Split the source tree into two new directories.

PSSRC files are now in 'gs/psi'.
GLSRC files are now in 'gs/base'.

This is to facilitate build modularization and merging in the ghostpdl
tree.

NOTE: msvc32.mak is now in psi, not src.

git-svn-id: http://svn.ghostscript.com/ghostscript/trunk@9048 a1074d23-0009-0410-80fe-cf8c14f379e6

1 files changed, 4489 insertions, 0 deletions

diff --git a/gs/psi/dscparse.c b/gs/psi/dscparse.c
new file mode 100644
index 000000000..f727d295a
--- /dev/null
+++ b/gs/psi/dscparse.c
@@ -0,0 +1,4489 @@
+/* Copyright (C) 2001-2006 Artifex Software, Inc.
+   All Rights Reserved.
+  
+   This software is provided AS-IS with no warranty, either express or
+   implied.
+
+   This software is distributed under license and may not be copied, modified
+   or distributed except as expressly authorized under the terms of that
+   license.  Refer to licensing information at http://www.artifex.com/
+   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
+   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
+*/
+
+/* $Id$ */
+
+/*
+ * This is a DSC parser, based on the DSC 3.0 spec, 
+ * with a few DSC 2.1 additions for page size.
+ *
+ * Current limitations:
+ * %%+ may be used after any comment in the comment or trailer, 
+ * but is currently only supported by
+ *   %%DocumentMedia
+ *
+ * DSC 2.1 additions (discontinued in DSC 3.0):
+ * %%DocumentPaperColors: 
+ * %%DocumentPaperForms: 
+ * %%DocumentPaperSizes: 
+ * %%DocumentPaperWeights: 
+ * %%PaperColor:   (ignored)
+ * %%PaperForm:    (ignored)
+ * %%PaperSize: 
+ * %%PaperWeight:  (ignored)
+ *
+ * Other additions for defaults or page section
+ % %%ViewingOrientation: xx xy yx yy
+*/
+
+#include <stdio.h>	/* for sprintf(), not file I/O */
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#define MAXSTR 256
+
+#include "dscparse.h"
+
+/* Macros for comparing string literals
+ * For maximum speed, the length of the second macro argument is
+ * computed at compile time.
+ * THE SECOND MACRO ARGUMENT MUST BE A STRING LITERAL.
+ */
+#define COMPARE(p,str) (strncmp((const char *)(p), (str), sizeof(str)-1)==0)
+#define IS_DSC(line, str) (COMPARE((line), (str)))
+
+/* Macros for comparing the first one or two characters */
+#define IS_WHITE(ch) (((ch)==' ') || ((ch)=='\t'))
+#define IS_EOL(ch) (((ch)=='\r') || ((ch)=='\n'))
+#define IS_WHITE_OR_EOL(ch) (IS_WHITE(ch) || IS_EOL(ch))
+#define IS_BLANK(str) (IS_EOL(str[0]))
+#define NOT_DSC_LINE(str) (((str)[0]!='%') || ((str)[1]!='%'))
+
+/* Macros for document offset to start and end of line */
+#define DSC_START(dsc)  ((dsc)->data_offset + (dsc)->data_index - (dsc)->line_length)
+#define DSC_END(dsc)  ((dsc)->data_offset + (dsc)->data_index)
+
+/* dsc_scan_SECTION() functions return one of 
+ * CDSC_ERROR, CDSC_OK, CDSC_NOTDSC 
+ * or one of the following
+ */
+/* The line should be passed on to the next section parser. */
+#define CDSC_PROPAGATE	10
+
+/* If document is DOS EPS and we haven't read 30 bytes, ask for more. */
+#define CDSC_NEEDMORE 11
+
+/* local prototypes */
+static void * dsc_memalloc(CDSC *dsc, size_t size);
+static void dsc_memfree(CDSC*dsc, void *ptr);
+static CDSC * dsc_init2(CDSC *dsc);
+static void dsc_reset(CDSC *dsc);
+static void dsc_section_join(DSC_OFFSET begin, DSC_OFFSET *pend, DSC_OFFSET **pplast);
+static int dsc_read_line(CDSC *dsc);
+static int dsc_read_doseps(CDSC *dsc);
+static int dsc_read_macbin(CDSC *dsc);
+static int dsc_read_applesingle(CDSC *dsc);
+static char * dsc_alloc_string(CDSC *dsc, const char *str, int len);
+static char * dsc_add_line(CDSC *dsc, const char *line, unsigned int len);
+static char * dsc_copy_string(char *str, unsigned int slen, 
+    char *line, unsigned int len, unsigned int *offset);
+static GSDWORD dsc_get_dword(const unsigned char *buf);
+static GSWORD dsc_get_word(const unsigned char *buf);
+static GSDWORD dsc_get_bigendian_dword(const unsigned char *buf);
+static GSWORD dsc_get_bigendian_word(const unsigned char *buf);
+static int dsc_get_int(const char *line, unsigned int len, unsigned int *offset);
+static float dsc_get_real(const char *line, unsigned int len, 
+    unsigned int *offset);
+static void dsc_unknown(CDSC *dsc); 
+static GSBOOL dsc_is_section(char *line);
+static int dsc_parse_pages(CDSC *dsc);
+static int dsc_parse_bounding_box(CDSC *dsc, CDSCBBOX** pbbox, int offset);
+static int dsc_parse_float_bounding_box(CDSC *dsc, CDSCFBBOX** pfbbox, int offset);
+static int dsc_parse_orientation(CDSC *dsc, unsigned int *porientation, 
+    int offset);
+static int dsc_parse_order(CDSC *dsc);
+static int dsc_parse_media(CDSC *dsc, const CDSCMEDIA **page_media);
+static int dsc_parse_document_media(CDSC *dsc);
+static int dsc_parse_viewing_orientation(CDSC *dsc, CDSCCTM **pctm);
+static int dsc_parse_page(CDSC *dsc);
+static void dsc_save_line(CDSC *dsc);
+static int dsc_scan_type(CDSC *dsc);
+static int dsc_scan_comments(CDSC *dsc);
+static int dsc_scan_preview(CDSC *dsc);
+static int dsc_scan_defaults(CDSC *dsc);
+static int dsc_scan_prolog(CDSC *dsc);
+static int dsc_scan_setup(CDSC *dsc);
+static int dsc_scan_page(CDSC *dsc);
+static int dsc_scan_trailer(CDSC *dsc);
+static int dsc_error(CDSC *dsc, unsigned int explanation, 
+    char *line, unsigned int line_len);
+static int dsc_dcs2_fixup(CDSC *dsc);
+static int dsc_parse_platefile(CDSC *dsc);
+static int dsc_parse_dcs1plate(CDSC *dsc);
+static CDSCCOLOUR * dsc_find_colour(CDSC *dsc, const char *colourname);
+static int dsc_parse_process_colours(CDSC *dsc);
+static int dsc_parse_custom_colours(CDSC *dsc);
+static int dsc_parse_cmyk_custom_colour(CDSC *dsc);
+static int dsc_parse_rgb_custom_colour(CDSC *dsc);
+
+/* DSC error reporting */
+static const int dsc_severity[] = {
+    CDSC_ERROR_WARN, 	/* CDSC_MESSAGE_BBOX */
+    CDSC_ERROR_WARN, 	/* CDSC_MESSAGE_EARLY_TRAILER */
+    CDSC_ERROR_WARN, 	/* CDSC_MESSAGE_EARLY_EOF */
+    CDSC_ERROR_ERROR, 	/* CDSC_MESSAGE_PAGE_IN_TRAILER */
+    CDSC_ERROR_ERROR, 	/* CDSC_MESSAGE_PAGE_ORDINAL */
+    CDSC_ERROR_ERROR, 	/* CDSC_MESSAGE_PAGES_WRONG */
+    CDSC_ERROR_ERROR, 	/* CDSC_MESSAGE_EPS_NO_BBOX */
+    CDSC_ERROR_ERROR, 	/* CDSC_MESSAGE_EPS_PAGES */
+    CDSC_ERROR_WARN, 	/* CDSC_MESSAGE_NO_MEDIA */
+    CDSC_ERROR_WARN, 	/* CDSC_MESSAGE_ATEND */
+    CDSC_ERROR_INFORM, 	/* CDSC_MESSAGE_DUP_COMMENT */
+    CDSC_ERROR_INFORM, 	/* CDSC_MESSAGE_DUP_TRAILER */
+    CDSC_ERROR_WARN, 	/* CDSC_MESSAGE_BEGIN_END */
+    CDSC_ERROR_INFORM, 	/* CDSC_MESSAGE_BAD_SECTION */
+    CDSC_ERROR_INFORM,  /* CDSC_MESSAGE_LONG_LINE */
+    CDSC_ERROR_WARN, 	/* CDSC_MESSAGE_INCORRECT_USAGE */
+    0
+};
+
+#define DSC_MAX_ERROR ((sizeof(dsc_severity) / sizeof(int))-2)
+
+const CDSCMEDIA dsc_known_media[CDSC_KNOWN_MEDIA] = {
+    /* These sizes taken from Ghostscript gs_statd.ps */
+    {"11x17", 792, 1224, 0, NULL, NULL},
+    {"A3", 842, 1190, 0, NULL, NULL},
+    {"A4", 595, 842, 0, NULL, NULL},
+    {"A5", 421, 595, 0, NULL, NULL},
+    {"B4", 709, 1002, 0, NULL, NULL}, /* ISO, but not Adobe standard */
+    {"B5", 501, 709, 0, NULL, NULL},  /* ISO, but not Adobe standard */
+    {"Ledger", 1224, 792, 0, NULL, NULL},
+    {"Legal", 612, 1008, 0, NULL, NULL},
+    {"Letter", 612, 792, 0, NULL, NULL},
+    {"Note", 612, 792, 0, NULL, NULL},
+    {NULL, 0, 0, 0, NULL, NULL}
+};
+
+/* parser state */
+enum CDSC_SCAN_SECTION {
+    scan_none = 0,
+    scan_comments = 1,
+    scan_pre_preview = 2,
+    scan_preview = 3,
+    scan_pre_defaults = 4,
+    scan_defaults = 5,
+    scan_pre_prolog = 6,
+    scan_prolog = 7,
+    scan_pre_setup = 8,
+    scan_setup = 9,
+    scan_pre_pages = 10,
+    scan_pages = 11,
+    scan_pre_trailer = 12,
+    scan_trailer = 13,
+    scan_eof = 14
+};
+
+static const char * const dsc_scan_section_name[15] = {
+ "Type", "Comments", 
+ "pre-Preview", "Preview",
+ "pre-Defaults", "Defaults",
+ "pre-Prolog", "Prolog",
+ "pre-Setup", "Setup",
+ "pre-Page", "Page",
+ "pre-Trailer", "Trailer",
+ "EOF"
+};
+
+
+/******************************************************************/
+/* Public functions                                               */
+/******************************************************************/
+
+/* constructor */
+CDSC *
+dsc_init(void *caller_data)
+{
+    CDSC *dsc = (CDSC *)malloc(sizeof(CDSC));
+    if (dsc == NULL)
+	return NULL;
+    memset(dsc, 0, sizeof(CDSC));
+    dsc->caller_data = caller_data;
+    dsc->ref_count = 0;
+    dsc_ref(dsc);
+
+    return dsc_init2(dsc);
+}
+
+/* constructor, with caller supplied memalloc */
+CDSC *
+dsc_init_with_alloc(
+    void *caller_data,
+    void *(*memalloc)(size_t size, void *closure_data),
+    void (*memfree)(void *ptr, void *closure_data),
+    void *closure_data)
+{
+    CDSC *dsc = (CDSC *)memalloc(sizeof(CDSC), closure_data);
+    if (dsc == NULL)
+	return NULL;
+    memset(dsc, 0, sizeof(CDSC));
+    dsc->caller_data = caller_data;
+
+    dsc->memalloc = memalloc;
+    dsc->memfree = memfree;
+    dsc->mem_closure_data = closure_data;
+    dsc->ref_count = 0;
+    dsc_ref(dsc);
+    
+    return dsc_init2(dsc);
+}
+
+
+
+/* destructor */
+void 
+dsc_free(CDSC *dsc)
+{
+    if (dsc == NULL)
+	return;
+    dsc_reset(dsc);
+    dsc_memfree(dsc, dsc);
+}
+
+
+CDSC *
+dsc_new(void *caller_data)
+{
+    return dsc_init(caller_data);
+}
+
+int
+dsc_ref(CDSC *dsc)
+{
+    return ++(dsc->ref_count);
+}
+
+int 
+dsc_unref(CDSC *dsc)
+{
+    if (dsc->ref_count <= 0)
+	return -1;
+    dsc->ref_count--;
+    if (dsc->ref_count == 0) {
+	dsc_free(dsc);
+	return 0;
+    }
+    return dsc->ref_count;
+}
+
+
+/* Tell DSC parser how long document will be, to allow ignoring
+ * of early %%Trailer and %%EOF.  This is optional.
+ */
+void 
+dsc_set_length(CDSC *dsc, DSC_OFFSET len)
+{
+    dsc->file_length = len;
+}
+
+/* Process a buffer containing DSC comments and PostScript */
+/* Return value is < 0 for error, >=0 for OK.
+ *  CDSC_ERROR
+ *  CDSC_OK
+ *  CDSC_NOTDSC (DSC will be ignored)
+ *  other values indicate the last DSC comment read
+ */ 
+int
+dsc_scan_data(CDSC *dsc, const char *data, int length)
+{
+    int bytes_read;
+    int code = 0;
+
+    if (dsc == NULL)
+	return CDSC_ERROR;
+
+    if (dsc->id == CDSC_NOTDSC)
+	return CDSC_NOTDSC;
+    dsc->id = CDSC_OK;
+    if (dsc->eof)
+	return CDSC_OK;	/* ignore */
+
+    if (length == 0) {
+	/* EOF, so process what remains */
+	dsc->eof = TRUE;
+    }
+
+    do {
+	if (dsc->id == CDSC_NOTDSC)
+	    break;
+
+	if (length != 0) {
+	    /* move existing data if needed */
+	    if (dsc->data_length > CDSC_DATA_LENGTH/2) {
+		memmove(dsc->data, dsc->data + dsc->data_index,
+		    dsc->data_length - dsc->data_index);
+		dsc->data_offset += dsc->data_index;
+		dsc->data_length -= dsc->data_index;
+		dsc->data_index = 0;
+	    }
+	    /* append to buffer */
+	    bytes_read = min(length, (int)(CDSC_DATA_LENGTH - dsc->data_length));
+	    memcpy(dsc->data + dsc->data_length, data, bytes_read);
+	    dsc->data_length += bytes_read;
+	    data += bytes_read;
+	    length -= bytes_read;
+	}
+	if (dsc->scan_section == scan_none) {
+	    code = dsc_scan_type(dsc);
+	    if (code == CDSC_NEEDMORE) {
+		/* need more characters before we can identify type */
+		code = CDSC_OK;
+		break;
+	    }
+	    dsc->id = code;
+	}
+
+        if (code == CDSC_NOTDSC) {
+	    dsc->id = CDSC_NOTDSC;
+	    break;
+	}
+
+	while ((code = dsc_read_line(dsc)) > 0) {
+	    if (dsc->id == CDSC_NOTDSC)
+		break;
+	    if (dsc->file_length && 
+		(dsc->data_offset + dsc->data_index > dsc->file_length)) {
+		/* have read past end of where we need to parse. */
+		return CDSC_OK;	/* ignore */
+	    }
+	    if (dsc->doseps_end && 
+		(dsc->data_offset + dsc->data_index > dsc->doseps_end)) {
+		/* have read past end of DOS EPS or Mac Binary 
+		 * PostScript section
+		 */
+		return CDSC_OK;	/* ignore */
+	    }
+	    if (dsc->eof)
+		return CDSC_OK;
+	    if (dsc->skip_document)
+		continue;	/* embedded document */
+	    if (dsc->skip_lines)
+		continue;	/* embedded lines */
+	    if (IS_DSC(dsc->line, "%%BeginData:"))
+		continue;
+	    if (IS_DSC(dsc->line, "%%BeginBinary:"))
+		continue;
+	    if (IS_DSC(dsc->line, "%%EndDocument"))
+		continue;
+	    if (IS_DSC(dsc->line, "%%EndData"))
+		continue;
+	    if (IS_DSC(dsc->line, "%%EndBinary"))
+		continue;
+
+	    do {
+		switch (dsc->scan_section) {
+		    case scan_comments:
+			code = dsc_scan_comments(dsc);
+			break;
+		    case scan_pre_preview:
+		    case scan_preview:
+			code = dsc_scan_preview(dsc);
+			break;
+		    case scan_pre_defaults:
+		    case scan_defaults:
+			code = dsc_scan_defaults(dsc);
+			break;
+		    case scan_pre_prolog:
+		    case scan_prolog:
+			code = dsc_scan_prolog(dsc);
+			break;
+		    case scan_pre_setup:
+		    case scan_setup:
+			code = dsc_scan_setup(dsc);
+			break;
+		    case scan_pre_pages:
+		    case scan_pages:
+			code = dsc_scan_page(dsc);
+			break;
+		    case scan_pre_trailer:
+		    case scan_trailer:
+			code = dsc_scan_trailer(dsc);
+			break;
+		    case scan_eof:
+			code = CDSC_OK;
+			break;
+		    default:
+			/* invalid state */
+			code = CDSC_ERROR;
+		}
+		/* repeat if line is start of next section */
+	    } while (code == CDSC_PROPAGATE);
+
+	    /* if DOS EPS header not complete, ask for more */
+	    if (code == CDSC_NEEDMORE) {
+		code = CDSC_OK;
+		break;
+	    }
+	    if (code == CDSC_NOTDSC) {
+		dsc->id = CDSC_NOTDSC;
+		break;
+	    }
+	}
+    } while (length != 0);
+
+    return (code < 0) ? code : dsc->id;
+}
+
+/* Tidy up from incorrect DSC comments */
+int 
+dsc_fixup(CDSC *dsc)
+{
+    unsigned int i;
+    char buf[32];
+    DSC_OFFSET *last;
+
+    if (dsc->id == CDSC_NOTDSC)
+	return 0;
+
+    /* flush last partial line */
+    dsc_scan_data(dsc, NULL, 0);
+
+
+    /* Fix DSC error: EOF before end of %%BeginData */
+    if (dsc->eof && 
+	(dsc->skip_lines || dsc->skip_bytes || dsc->skip_document)) {
+	switch (dsc->scan_section) {
+	    case scan_comments:
+		dsc->endcomments = DSC_END(dsc);
+		break;
+	    case scan_preview:
+		dsc->endpreview = DSC_END(dsc);
+		break;
+	    case scan_defaults:
+		dsc->enddefaults = DSC_END(dsc);
+		break;
+	    case scan_prolog:
+		dsc->endprolog = DSC_END(dsc);
+		break;
+	    case scan_setup:
+		dsc->endsetup = DSC_END(dsc);
+		break;
+	    case scan_pages:
+		if (dsc->page_count)
+		    dsc->page[dsc->page_count-1].end = DSC_END(dsc);
+		break;
+	    case scan_trailer:
+	    case scan_eof:
+		dsc->endtrailer = DSC_END(dsc);
+		break;
+	}
+    }
+    
+    /* Fix DSC error: code between %%EndSetup and %%Page */
+    if (dsc->page_count && (dsc->page[0].begin != dsc->endsetup)
+		&& (dsc->endsetup != dsc->beginsetup)) {
+	dsc->endsetup = dsc->page[0].begin;
+	dsc_debug_print(dsc, "Warning: code included between setup and first page\n");
+    }
+
+    /* Last page contained a false trailer, */
+    /* so extend last page to start of trailer */
+    if (dsc->page_count && (dsc->begintrailer != 0) &&
+	(dsc->page[dsc->page_count-1].end != dsc->begintrailer)) {
+	dsc_debug_print(dsc, "Ignoring earlier misplaced trailer\n");
+	dsc_debug_print(dsc, "and extending last page to start of trailer\n"); 
+	dsc->page[dsc->page_count-1].end = dsc->begintrailer;
+    }
+
+    /* 
+     * Join up all sections.
+     * There might be extra code between them, or we might have
+     * missed including the \n which followed \r.
+     */
+    last = &dsc->endcomments;
+    dsc_section_join(dsc->beginpreview, &dsc->endpreview, &last);
+    dsc_section_join(dsc->begindefaults, &dsc->enddefaults, &last);
+    dsc_section_join(dsc->beginprolog, &dsc->endprolog, &last);
+    dsc_section_join(dsc->beginsetup, &dsc->endsetup, &last);
+    for (i=0; i<dsc->page_count; i++)
+	dsc_section_join(dsc->page[i].begin, &dsc->page[i].end, &last);
+    if (dsc->begintrailer)
+	*last = dsc->begintrailer;
+	
+    if ((dsc->page_pages == 0) && (dsc->page_count == 1)) {
+	/* don't flag an error if %%Pages absent but one %%Page found */
+	/* adjust incorrect page count */
+	dsc->page_pages = dsc->page_count;
+    }
+
+    /* Warnings and Errors that we can now identify */
+    if ((dsc->page_count != dsc->page_pages)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_PAGES_WRONG, NULL, 0);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+		/* adjust incorrect page count */
+		dsc->page_pages = dsc->page_count;
+		break;
+	    case CDSC_RESPONSE_CANCEL:
+		break;;
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+
+    if (dsc->epsf && (dsc->bbox == (CDSCBBOX *)NULL)) {
+	/* EPS files MUST include a BoundingBox */
+	int rc = dsc_error(dsc, CDSC_MESSAGE_EPS_NO_BBOX, NULL, 0);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+		/* Assume that it is EPS */
+		break;
+	    case CDSC_RESPONSE_CANCEL:
+		/* Is NOT an EPS file */
+		dsc->epsf = FALSE;
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+
+    if (dsc->epsf && ((dsc->page_count > 1) || (dsc->page_pages > 1))) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_EPS_PAGES, NULL, 0);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+		/* Is an EPS file */
+		break;
+	    case CDSC_RESPONSE_CANCEL:
+		/* Is NOT an EPS file */
+		dsc->epsf = FALSE;
+		break;
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+
+    /* convert single file DSC 2.0 into multiple pages */
+    dsc_dcs2_fixup(dsc);
+
+    if ((dsc->media_count == 1) && (dsc->page_media == NULL)) {
+	/* if one only media was specified, and default page media */
+	/* was not specified, assume that default is the only media. */
+	dsc->page_media = dsc->media[0];
+    }
+
+    if ((dsc->media_count != 0) && (dsc->page_media == NULL)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_NO_MEDIA, NULL, 0);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+		/* default media is first listed */
+		dsc->page_media = dsc->media[0];
+		break;
+	    case CDSC_RESPONSE_CANCEL:
+		/* No default media */
+		break;
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+
+    /* make sure all pages have a label */
+    for (i=0; i<dsc->page_count; i++) {
+	if (strlen(dsc->page[i].label) == 0) {
+	    sprintf(buf, "%d", i+1);
+	    if ((dsc->page[i].label = dsc_alloc_string(dsc, buf, (int)strlen(buf))) 
+		== (char *)NULL)
+		return CDSC_ERROR;	/* no memory */
+	}
+    }
+    return CDSC_OK;
+}
+
+/* Install a function to be used for displaying messages about 
+ * DSC errors and warnings, and to request advice from user.
+ * Installing an error function is optional.
+ */
+void 
+dsc_set_error_function(CDSC *dsc, 
+	int (*fn)(void *caller_data, CDSC *dsc, 
+	unsigned int explanation, const char *line, unsigned int line_len))
+{
+    dsc->dsc_error_fn = fn;
+}
+
+
+/* Install a function for printing debug messages */
+/* This is optional */
+void 
+dsc_set_debug_function(CDSC *dsc, 
+	void (*debug_fn)(void *caller_data, const char *str))
+{
+    dsc->debug_print_fn = debug_fn;
+}
+
+/* Doesn't need to be public for PostScript documents */
+/* Made public so GSview can add pages when processing PDF files */
+int 
+dsc_add_page(CDSC *dsc, int ordinal, char *label)
+{
+    dsc->page[dsc->page_count].ordinal = ordinal;
+    dsc->page[dsc->page_count].label = 
+	dsc_alloc_string(dsc, label, (int)strlen(label)+1);
+    dsc->page[dsc->page_count].begin = 0;
+    dsc->page[dsc->page_count].end = 0;
+    dsc->page[dsc->page_count].orientation = CDSC_ORIENT_UNKNOWN;
+    dsc->page[dsc->page_count].media = NULL;
+    dsc->page[dsc->page_count].bbox = NULL;
+    dsc->page[dsc->page_count].viewing_orientation = NULL;
+    dsc->page[dsc->page_count].crop_box = NULL;
+
+    dsc->page_count++;
+    if (dsc->page_count >= dsc->page_chunk_length) {
+	CDSCPAGE *new_page = (CDSCPAGE *)dsc_memalloc(dsc, 
+	    (CDSC_PAGE_CHUNK+dsc->page_count) * sizeof(CDSCPAGE));
+	if (new_page == NULL)
+	    return CDSC_ERROR;	/* out of memory */
+	memcpy(new_page, dsc->page, 
+	    dsc->page_count * sizeof(CDSCPAGE));
+	dsc_memfree(dsc, dsc->page);
+	dsc->page= new_page;
+	dsc->page_chunk_length = CDSC_PAGE_CHUNK+dsc->page_count;
+    }
+    return CDSC_OK;
+}
+
+/* Doesn't need to be public for PostScript documents */
+/* Made public so GSview can store PDF MediaBox */
+int
+dsc_add_media(CDSC *dsc, CDSCMEDIA *media)
+{
+    CDSCMEDIA **newmedia_array;
+    CDSCMEDIA *newmedia;
+
+    /* extend media array  */
+    newmedia_array = (CDSCMEDIA **)dsc_memalloc(dsc, 
+	(dsc->media_count + 1) * sizeof(CDSCMEDIA *));
+    if (newmedia_array == NULL)
+	return CDSC_ERROR;	/* out of memory */
+    if (dsc->media != NULL) {
+	memcpy(newmedia_array, dsc->media, 
+	    dsc->media_count * sizeof(CDSCMEDIA *));
+	dsc_memfree(dsc, dsc->media);
+    }
+    dsc->media = newmedia_array;
+
+    /* allocate new media */
+    newmedia = dsc->media[dsc->media_count] =
+	(CDSCMEDIA *)dsc_memalloc(dsc, sizeof(CDSCMEDIA));
+    if (newmedia == NULL)
+	return CDSC_ERROR;	/* out of memory */
+    newmedia->name = NULL;
+    newmedia->width = 595.0;
+    newmedia->height = 842.0;
+    newmedia->weight = 80.0;
+    newmedia->colour = NULL;
+    newmedia->type = NULL;
+    newmedia->mediabox = NULL;
+
+    dsc->media_count++;
+
+    if (media->name) {
+	newmedia->name = dsc_alloc_string(dsc, media->name,
+	    (int)strlen(media->name));
+	if (newmedia->name == NULL)
+	    return CDSC_ERROR;	/* no memory */
+    }
+    newmedia->width = media->width;
+    newmedia->height = media->height;
+    newmedia->weight = media->weight;
+    if (media->colour) {
+	newmedia->colour = dsc_alloc_string(dsc, media->colour, 
+	    (int)strlen(media->colour));
+        if (newmedia->colour == NULL)
+	    return CDSC_ERROR;	/* no memory */
+    }
+    if (media->type) {
+	newmedia->type = dsc_alloc_string(dsc, media->type, 
+	    (int)strlen(media->type));
+	if (newmedia->type == NULL)
+	    return CDSC_ERROR;	/* no memory */
+    }
+    newmedia->mediabox = NULL;
+
+    if (media->mediabox) {
+	newmedia->mediabox = (CDSCBBOX *)dsc_memalloc(dsc, sizeof(CDSCBBOX));
+	if (newmedia->mediabox == NULL)
+	    return CDSC_ERROR;	/* no memory */
+	*newmedia->mediabox = *media->mediabox;
+    }
+    return CDSC_OK;
+}
+
+/* Doesn't need to be public for PostScript documents */
+/* Made public so GSview can store PDF CropBox */
+int
+dsc_set_page_bbox(CDSC *dsc, unsigned int page_number, 
+    int llx, int lly, int urx, int ury)
+{
+    CDSCBBOX *bbox;
+    if (page_number >= dsc->page_count)
+	return CDSC_ERROR;
+    bbox = dsc->page[page_number].bbox;
+    if (bbox == NULL)
+	dsc->page[page_number].bbox = bbox = 
+	    (CDSCBBOX *)dsc_memalloc(dsc, sizeof(CDSCBBOX));
+    if (bbox == NULL)
+	return CDSC_ERROR;
+    bbox->llx = llx;
+    bbox->lly = lly;
+    bbox->urx = urx;
+    bbox->ury = ury;
+    return CDSC_OK;
+}
+
+
+/******************************************************************/
+/* Private functions below here.                                  */
+/******************************************************************/
+
+static void *
+dsc_memalloc(CDSC *dsc, size_t size)
+{
+    if (dsc->memalloc)
+	return dsc->memalloc(size, dsc->mem_closure_data);
+    return malloc(size);
+}
+
+static void
+dsc_memfree(CDSC*dsc, void *ptr)
+{
+    if (dsc->memfree) 
+	dsc->memfree(ptr, dsc->mem_closure_data);
+    else
+	free(ptr);
+}
+
+/* private constructor */
+static CDSC *
+dsc_init2(CDSC *dsc)
+{
+    dsc_reset(dsc);
+
+    dsc->string_head = (CDSCSTRING *)dsc_memalloc(dsc, sizeof(CDSCSTRING));
+    if (dsc->string_head == NULL) {
+	dsc_free(dsc);
+	return NULL;	/* no memory */
+    }
+    dsc->string = dsc->string_head;
+    dsc->string->next = NULL;
+    dsc->string->data = (char *)dsc_memalloc(dsc, CDSC_STRING_CHUNK);
+    if (dsc->string->data == NULL) {
+	dsc_free(dsc);
+	return NULL;	/* no memory */
+    }
+    dsc->string->index = 0;
+    dsc->string->length = CDSC_STRING_CHUNK;
+	
+    dsc->page = (CDSCPAGE *)dsc_memalloc(dsc, CDSC_PAGE_CHUNK * sizeof(CDSCPAGE));
+    if (dsc->page == NULL) {
+	dsc_free(dsc);
+	return NULL;	/* no memory */
+    }
+    dsc->page_chunk_length = CDSC_PAGE_CHUNK;
+    dsc->page_count = 0;
+	
+    dsc->line = NULL;
+    dsc->data_length = 0;
+    dsc->data_index = dsc->data_length;
+
+    return dsc;
+}
+
+
+static void 
+dsc_reset(CDSC *dsc)
+{
+    unsigned int i;
+    /* Clear public members */
+    dsc->dsc = FALSE;
+    dsc->ctrld = FALSE;
+    dsc->pjl = FALSE;
+    dsc->epsf = FALSE;
+    dsc->pdf = FALSE;
+    dsc->epsf = FALSE;
+    dsc->preview = CDSC_NOPREVIEW;
+    dsc->dsc_version = NULL;	/* stored in dsc->string */
+    dsc->language_level = 0;
+    dsc->document_data = CDSC_DATA_UNKNOWN;
+    dsc->begincomments = 0;
+    dsc->endcomments = 0;
+    dsc->beginpreview = 0;
+    dsc->endpreview = 0;
+    dsc->begindefaults = 0;
+    dsc->enddefaults = 0;
+    dsc->beginprolog = 0;
+    dsc->endprolog = 0;
+    dsc->beginsetup = 0;
+    dsc->endsetup = 0;
+    dsc->begintrailer = 0;
+    dsc->endtrailer = 0;
+	
+    for (i=0; i<dsc->page_count; i++) {
+	/* page media is pointer to an element of media or dsc_known_media */
+	/* do not free it. */
+
+	if (dsc->page[i].bbox)
+	    dsc_memfree(dsc, dsc->page[i].bbox);
+	if (dsc->page[i].viewing_orientation)
+	    dsc_memfree(dsc, dsc->page[i].viewing_orientation);
+	if (dsc->page[i].crop_box)
+	    dsc_memfree(dsc, dsc->page[i].crop_box);
+    }
+    if (dsc->page)
+	dsc_memfree(dsc, dsc->page);
+    dsc->page = NULL;
+	
+    dsc->page_count = 0;
+    dsc->page_pages = 0;
+    dsc->page_order = CDSC_ORDER_UNKNOWN;
+    dsc->page_orientation = CDSC_ORIENT_UNKNOWN;
+    if (dsc->viewing_orientation)
+	dsc_memfree(dsc, dsc->viewing_orientation);
+    dsc->viewing_orientation = NULL;
+	
+    if (dsc->media) {
+	for (i=0; i<dsc->media_count; i++) {
+	    if (dsc->media[i]) {
+		if (dsc->media[i]->mediabox)
+		    dsc_memfree(dsc, dsc->media[i]->mediabox);
+		dsc_memfree(dsc, dsc->media[i]);
+	    }
+	}
+	dsc_memfree(dsc, dsc->media);
+    }
+    dsc->media_count = 0;
+    dsc->media = NULL;
+
+    /* page_media is pointer to an element of media or dsc_known_media */
+    /* do not free it. */
+    dsc->page_media = NULL;
+
+    if (dsc->bbox)
+	dsc_memfree(dsc, dsc->bbox);
+    dsc->bbox = NULL;
+    if (dsc->page_bbox)
+	dsc_memfree(dsc, dsc->page_bbox);
+    dsc->page_bbox = NULL;
+    if (dsc->doseps)
+	dsc_memfree(dsc, dsc->doseps);
+    dsc->doseps = NULL;
+	
+    dsc->dsc_title = NULL;
+    dsc->dsc_creator = NULL;
+    dsc->dsc_date = NULL;
+    dsc->dsc_for = NULL;
+	
+
+    dsc->max_error = DSC_MAX_ERROR;
+    dsc->severity = dsc_severity;
+
+    /* Clear private members */
+    /* Don't touch dsc->caller_data */
+    dsc->id = CDSC_OK;
+    dsc->scan_section = scan_none;
+    dsc->doseps_end = 0;
+    dsc->page_chunk_length = 0;
+    dsc->file_length = 0;
+    dsc->skip_document = 0;
+    dsc->skip_bytes = 0;
+    dsc->skip_lines = 0;
+    dsc->skip_pjl = 0;
+    dsc->begin_font_count = 0;
+    dsc->begin_feature_count = 0;
+    dsc->begin_resource_count = 0;
+    dsc->begin_procset_count = 0;
+
+    dsc->data_length = 0;
+    dsc->data_index = 0;
+    dsc->data_offset = 0;
+
+    dsc->eof = 0;
+	
+    dsc->line = 0;
+    dsc->line_length = 0;
+    dsc->eol = 0;
+    dsc->last_cr = FALSE;
+    dsc->line_count = 1;
+    dsc->long_line = FALSE;
+    memset(dsc->last_line, 0, sizeof(dsc->last_line));
+
+    dsc->string = dsc->string_head;
+    while (dsc->string != (CDSCSTRING *)NULL) {
+	if (dsc->string->data)
+	    dsc_memfree(dsc, dsc->string->data);
+	dsc->string_head = dsc->string;
+	dsc->string = dsc->string->next;
+	dsc_memfree(dsc, dsc->string_head);
+    }
+    dsc->string_head = NULL;
+    dsc->string = NULL;
+
+    /* don't touch caller functions */
+
+    /* public data */
+    if (dsc->hires_bbox)
+	dsc_memfree(dsc, dsc->hires_bbox);
+    dsc->hires_bbox = NULL;
+    if (dsc->crop_box)
+	dsc_memfree(dsc, dsc->crop_box);
+    dsc->crop_box = NULL;
+
+    if (dsc->dcs2) {
+	CDCS2 *this_dcs, *next_dcs;
+	this_dcs = dsc->dcs2;
+	while (this_dcs) {
+	    next_dcs = this_dcs->next;
+	    /* strings have already been freed */
+	    dsc_memfree(dsc, this_dcs);
+	    this_dcs = next_dcs;
+	}
+	dsc->dcs2 = NULL;
+    }
+    if (dsc->colours) {
+	CDSCCOLOUR *this_colour, *next_colour;
+	this_colour = dsc->colours;
+	while (this_colour) {
+	    next_colour = this_colour->next;
+	    /* strings have already been freed */
+	    dsc_memfree(dsc, this_colour);
+	    this_colour = next_colour;
+	}
+	dsc->colours = NULL;
+    }
+
+    if (dsc->macbin)
+	dsc_memfree(dsc, dsc->macbin);
+    dsc->macbin = NULL;
+}
+
+/* 
+* Join up all sections.
+* There might be extra code between them, or we might have
+* missed including the \n which followed \r.
+* begin is the start of this section
+* pend is a pointer to the end of this section
+* pplast is a pointer to a pointer of the end of the previous section
+*/
+static void 
+dsc_section_join(DSC_OFFSET begin, DSC_OFFSET *pend, DSC_OFFSET **pplast)
+{
+    if (begin)
+	**pplast = begin;
+    if (*pend > begin)
+	*pplast = pend;
+}
+
+
+/* return value is 0 if no line available, or length of line */
+static int
+dsc_read_line(CDSC *dsc)
+{
+    char *p, *last;
+    dsc->line = NULL;
+
+    if (dsc->eof) {
+	/* return all that remains, even if line incomplete */
+	dsc->line = dsc->data + dsc->data_index;
+	dsc->line_length = dsc->data_length - dsc->data_index;
+	dsc->data_index = dsc->data_length;
+	return dsc->line_length;
+    }
+
+    if (dsc->file_length && 
+	(dsc->data_offset + dsc->data_index >= dsc->file_length)) {
+	/* Have read past where we need to parse. */
+	/* Ignore all that remains. */
+	dsc->line = dsc->data + dsc->data_index;
+	dsc->line_length = dsc->data_length - dsc->data_index;
+	dsc->data_index = dsc->data_length;
+	return dsc->line_length;
+
+    }
+    if (dsc->doseps_end && 
+	(dsc->data_offset + dsc->data_index >= dsc->doseps_end)) {
+	/* Have read past end of DOS EPS PostScript section. */
+	/* Ignore all that remains. */
+	dsc->line = dsc->data + dsc->data_index;
+	dsc->line_length = dsc->data_length - dsc->data_index;
+	dsc->data_index = dsc->data_length;
+	return dsc->line_length;
+    }
+
+    /* ignore embedded bytes */
+    if (dsc->skip_bytes) {
+	int cnt = min(dsc->skip_bytes,
+		     (int)(dsc->data_length - dsc->data_index));
+	dsc->skip_bytes -= cnt;
+	dsc->data_index += cnt;
+	if (dsc->skip_bytes != 0)
+	    return 0;
+    }
+
+    do {
+	dsc->line = dsc->data + dsc->data_index;
+	last = dsc->data + dsc->data_length;
+	if (dsc->data_index == dsc->data_length) {
+	    dsc->line_length = 0;
+	    return 0;
+	}
+	if (dsc->eol) {
+	    /* if previous line was complete, increment line count */
+	    dsc->line_count++;
+	    if (dsc->skip_lines)
+		dsc->skip_lines--;
+	}
+	    
+	/* skip over \n which followed \r */
+	if (dsc->last_cr && dsc->line[0] == '\n') {
+	    dsc->data_index++;
+	    dsc->line++;
+	}
+	dsc->last_cr = FALSE;
+
+	/* look for EOL */
+	dsc->eol = FALSE;
+	for (p = dsc->line; p < last; p++) {
+	    if (*p == '\r') {
+		p++;
+		if ((p<last) && (*p == '\n'))
+		    p++;	/* include line feed also */
+		else
+		    dsc->last_cr = TRUE; /* we might need to skip \n */
+		dsc->eol = TRUE;	/* dsc->line is a complete line */
+		break;
+	    }
+	    if (*p == '\n') {
+		p++;
+		dsc->eol = TRUE;	/* dsc->line is a complete line */
+		break;
+	    }
+	    if (*p == '\032') {		/* MS-DOS Ctrl+Z */
+		dsc->eol = TRUE;
+	    }
+	}
+	if (dsc->eol == FALSE) {
+	    /* we haven't got a complete line yet */
+	    if (dsc->data_length - dsc->data_index < sizeof(dsc->data)/2) {
+		/* buffer is less than half full, ask for some more */
+		dsc->line_length = 0;
+		return 0;
+	    }
+	}
+	dsc->data_index += dsc->line_length = (int)(p - dsc->line);
+    } while (dsc->skip_lines && dsc->line_length);
+
+    if (dsc->line_length == 0)
+	return 0;
+	
+    if ((dsc->line[0]=='%') && (dsc->line[1]=='%'))  {
+	/* handle recursive %%BeginDocument */
+	if ((dsc->skip_document) && dsc->line_length &&
+		COMPARE(dsc->line, "%%EndDocument")) {
+	    dsc->skip_document--;
+	}
+
+	/* handle embedded lines or binary data */
+	if (COMPARE(dsc->line, "%%BeginData:")) {
+	    /* %%BeginData: <numberof>[ <type> [ <bytesorlines> ] ] 
+	     * <numberof> ::= <uint> (Lines or physical bytes) 
+	     * <type> ::= Hex | Binary | ASCII (Type of data) 
+	     * <bytesorlines> ::= Bytes | Lines (Read in bytes or lines) 
+	     */
+	    char begindata[MAXSTR+1];
+	    int cnt;
+	    const char *numberof, *bytesorlines;
+	    cnt = dsc->line_length;
+	    if (dsc->line_length > sizeof(begindata)-1)
+		cnt = sizeof(begindata)-1;
+	    memcpy(begindata, dsc->line, cnt);
+	    begindata[cnt] = '\0';
+	    numberof = strtok(begindata+12, " \r\n");
+	    strtok(NULL, " \r\n");	/* dump type */
+	    bytesorlines = strtok(NULL, " \r\n");
+	    if (bytesorlines == NULL)
+		bytesorlines = "Bytes";
+	   
+	    if ( (numberof == NULL) || (bytesorlines == NULL) ) {
+		/* invalid usage of %%BeginData */
+		/* ignore that we ever saw it */
+		int rc = dsc_error(dsc, CDSC_MESSAGE_INCORRECT_USAGE, 
+			    dsc->line, dsc->line_length);
+		switch (rc) {
+		    case CDSC_RESPONSE_OK:
+		    case CDSC_RESPONSE_CANCEL:
+			break;
+		    case CDSC_RESPONSE_IGNORE_ALL:
+			return 0;
+		}
+	    }
+	    else {
+		cnt = atoi(numberof);
+		if (cnt) {
+		    if (bytesorlines && (dsc_stricmp(bytesorlines, "Lines")==0)) {
+			/* skip cnt lines */
+			if (dsc->skip_lines == 0) {
+			    /* we are not already skipping lines */
+			    dsc->skip_lines = cnt+1;
+			}
+		    }
+		    else {
+			/* byte count doesn't includes \n or \r\n  */
+			/* or \r of %%BeginData: */
+			/* skip cnt bytes */
+			if (dsc->skip_bytes == 0) {
+			    /* we are not already skipping lines */
+			    dsc->skip_bytes = cnt;
+			}
+
+		    }
+		}
+	    }
+	}
+	else if (COMPARE(dsc->line, "%%BeginBinary:")) {
+	    /* byte count doesn't includes \n or \r\n or \r of %%BeginBinary:*/
+	    int cnt = dsc_get_int(dsc->line + 14,
+		dsc->line_length - 14, NULL);
+	    if (dsc->skip_bytes == 0) {
+		/* we are not already skipping lines */
+		dsc->skip_bytes = cnt;
+	    }
+	}
+    }
+	
+    if ((dsc->line[0]=='%') && (dsc->line[1]=='%') &&
+	COMPARE(dsc->line, "%%BeginDocument:") ) {
+	/* Skip over embedded document, recursively */
+	dsc->skip_document++;
+    }
+
+    if (!dsc->long_line && (dsc->line_length > DSC_LINE_LENGTH)) {
+	dsc_error(dsc, CDSC_MESSAGE_LONG_LINE, dsc->line, dsc->line_length);
+        dsc->long_line = TRUE;
+    }
+	
+    return dsc->line_length;
+}
+
+
+/* Save last DSC line, for use with %%+ */
+static void 
+dsc_save_line(CDSC *dsc)
+{
+    int len = min(sizeof(dsc->last_line), dsc->line_length);
+    memcpy(dsc->last_line, dsc->line, len);
+}
+
+/* display unknown DSC line */
+static void 
+dsc_unknown(CDSC *dsc)
+{
+    if (dsc->debug_print_fn) {
+	char line[DSC_LINE_LENGTH];
+	unsigned int length = min(DSC_LINE_LENGTH-1, dsc->line_length);
+	sprintf(line, "Unknown in %s section at line %d:\n  ", 
+	    dsc_scan_section_name[dsc->scan_section], dsc->line_count);
+	dsc_debug_print(dsc, line);
+	strncpy(line, dsc->line, length);
+	line[length] = '\0';
+	dsc_debug_print(dsc, line);
+	dsc_debug_print(dsc, "\n");
+    }
+}
+
+
+static GSBOOL
+dsc_is_section(char *line)
+{
+    if ( !((line[0]=='%') && (line[1]=='%')) )
+	return FALSE;
+    if (IS_DSC(line, "%%BeginPreview"))
+	return TRUE;
+    if (IS_DSC(line, "%%BeginDefaults"))
+	return TRUE;
+    if (IS_DSC(line, "%%BeginProlog"))
+	return TRUE;
+    if (IS_DSC(line, "%%BeginSetup"))
+	return TRUE;
+    if (IS_DSC(line, "%%Page:"))
+	return TRUE;
+    if (IS_DSC(line, "%%Trailer"))
+	return TRUE;
+    if (IS_DSC(line, "%%EOF"))
+	return TRUE;
+    return FALSE;
+}
+
+/* Get little-endian DWORD, used for DOS EPS files */
+static GSDWORD
+dsc_get_dword(const unsigned char *buf)
+{
+    GSDWORD dw;
+    dw = (GSDWORD)buf[0];
+    dw += ((GSDWORD)buf[1])<<8;
+    dw += ((GSDWORD)buf[2])<<16;
+    dw += ((GSDWORD)buf[3])<<24;
+    return dw;
+}
+
+static GSWORD
+dsc_get_word(const unsigned char *buf)
+{
+    GSWORD w;
+    w = (GSWORD)buf[0];
+    w |= (GSWORD)(buf[1]<<8);
+    return w;
+}
+
+/* Get big-endian DWORD, used for Mac Binary files */
+static GSDWORD
+dsc_get_bigendian_dword(const unsigned char *buf)
+{
+    GSDWORD dw;
+    dw = (GSDWORD)buf[3];
+    dw += ((GSDWORD)buf[2])<<8;
+    dw += ((GSDWORD)buf[1])<<16;
+    dw += ((GSDWORD)buf[0])<<24;
+    return dw;
+}
+
+static GSWORD
+dsc_get_bigendian_word(const unsigned char *buf)
+{
+    GSWORD w;
+    w = (GSWORD)buf[1];
+    w |= (GSWORD)(buf[0]<<8);
+    return w;
+}
+
+static int
+dsc_read_doseps(CDSC *dsc)
+{
+    unsigned char *line = (unsigned char *)dsc->line;
+    if ((dsc->doseps = (CDSCDOSEPS *)dsc_memalloc(dsc, sizeof(CDSCDOSEPS))) == NULL)
+	return CDSC_ERROR;	/* no memory */
+	
+    dsc->doseps->ps_begin = dsc_get_dword(line+4);
+    dsc->doseps->ps_length = dsc_get_dword(line+8);
+    dsc->doseps->wmf_begin = dsc_get_dword(line+12);
+    dsc->doseps->wmf_length = dsc_get_dword(line+16);
+    dsc->doseps->tiff_begin = dsc_get_dword(line+20);
+    dsc->doseps->tiff_length = dsc_get_dword(line+24);
+    dsc->doseps->checksum = dsc_get_word(line+28);
+
+    if (dsc->file_length && 
+	(dsc->doseps->ps_begin + dsc->doseps->ps_length > dsc->file_length)) {
+	/* Error in DOS EPS header.
+	 * Some files have been seen with a fixed large value as 
+	 * the length of the PostScript section.
+	 * Correct for these erroneous files.
+	 */
+	 dsc->doseps->ps_length = 
+	    (GSDWORD)(dsc->file_length - dsc->doseps->ps_begin);
+    }
+
+    dsc->doseps_end = dsc->doseps->ps_begin + dsc->doseps->ps_length;
+
+    /* move data_index backwards to byte after doseps header */
+    dsc->data_index -= dsc->line_length - 30;
+    /* we haven't read a line of PostScript code yet */
+    dsc->line_count = 0;
+    /* skip from current position to start of PostScript section */
+    dsc->skip_bytes = dsc->doseps->ps_begin - 30;
+
+    if (dsc->doseps->tiff_begin)
+	dsc->preview = CDSC_TIFF;
+    if (dsc->doseps->wmf_begin)
+	dsc->preview = CDSC_WMF;
+
+    return CDSC_OK;
+}
+
+
+static int
+dsc_read_macbin(CDSC *dsc)
+{
+    unsigned char *line = (unsigned char *)dsc->line;
+    if ((dsc->macbin = 
+	(CDSCMACBIN *)dsc_memalloc(dsc, sizeof(CDSCMACBIN))) == NULL)
+	return CDSC_ERROR;	/* no memory */
+	
+    dsc->macbin->data_begin = 128;
+    dsc->macbin->data_length = dsc_get_bigendian_dword(line+83);
+    dsc->macbin->resource_begin = 
+	(dsc->macbin->data_begin + dsc->macbin->data_length + 127 ) & ~127;
+    dsc->macbin->resource_length = dsc_get_bigendian_dword(line+87);
+
+    if (dsc->file_length && 
+	(((dsc->macbin->resource_begin + dsc->macbin->resource_length 
+	  + 127) & ~127) > dsc->file_length)) {
+	return CDSC_ERROR;
+    }
+
+    dsc->doseps_end = dsc->macbin->data_begin + dsc->macbin->data_length;
+
+    /* move data_index to byte after Mac Binary header */
+    dsc->data_index -= dsc->line_length - 128;
+    /* we haven't read a line of PostScript code yet */
+    dsc->line_count = 0;
+
+    dsc->preview = CDSC_PICT;
+
+    return CDSC_OK;
+}
+
+
+static int
+dsc_read_applesingle(CDSC *dsc)
+{
+    GSDWORD EntryID;
+    GSDWORD Offset;
+    GSDWORD Length;
+    GSWORD entries;
+    int index;
+    int header;
+    int i;
+
+    unsigned char *line = (unsigned char *)dsc->line;
+    if ((dsc->macbin = 
+	(CDSCMACBIN *)dsc_memalloc(dsc, sizeof(CDSCMACBIN))) == NULL)
+	return CDSC_ERROR;	/* no memory */
+    entries = dsc_get_bigendian_word(line+24);
+    for (i=0; i<(int)entries; i++) {
+	index = 26 + i * 12;
+	EntryID = dsc_get_bigendian_dword(line+index);
+	Offset = dsc_get_bigendian_dword(line+index+4);
+	Length = dsc_get_bigendian_dword(line+index+8);
+	if (EntryID == 1) {
+	    /* data fork */
+	    dsc->macbin->data_begin = Offset;
+	    dsc->macbin->data_length = Length;
+	}
+	else if (EntryID == 2) {
+	    /* resource fork */
+	    dsc->macbin->resource_begin = Offset;
+	    dsc->macbin->resource_length = Length;
+	}
+    }
+	
+    if (dsc->file_length && 
+	(dsc->macbin->resource_begin + dsc->macbin->resource_length
+	  > dsc->file_length)) {
+	return CDSC_ERROR;
+    }
+    if (dsc->file_length && 
+	(dsc->macbin->data_begin + dsc->macbin->data_length 
+	  > dsc->file_length)) {
+	return CDSC_ERROR;
+    }
+
+    dsc->doseps_end = dsc->macbin->data_begin + dsc->macbin->data_length;
+
+    header = 26 + entries * 12;
+    /* move data_index to byte after AppleSingle/AppleDouble header */
+    dsc->data_index -= dsc->line_length - header;
+    /* we haven't read a line of PostScript code yet */
+    dsc->line_count = 0;
+    /* skip from current position to start of PostScript section */
+    dsc->skip_bytes = dsc->macbin->data_begin - header;
+
+    dsc->preview = CDSC_PICT;
+
+    return CDSC_OK;
+}
+
+static int 
+dsc_parse_pages(CDSC *dsc)
+{
+    int ip, io; 
+    unsigned int i;
+    char *p;
+    int n;
+    if ((dsc->page_pages != 0) && (dsc->scan_section == scan_comments)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		return CDSC_OK;	/* ignore duplicate comments in header */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    if ((dsc->page_pages != 0) && (dsc->scan_section == scan_trailer)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		break;		/* use duplicate comments in header */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+
+    n = IS_DSC(dsc->line, "%%+") ? 3 : 8;
+    while (IS_WHITE(dsc->line[n]))
+	n++;
+    p = dsc->line + n;
+    if (COMPARE(p, "atend")) {
+	if (dsc->scan_section != scan_comments)
+	    dsc_unknown(dsc);
+	else {
+	    int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, 
+		dsc->line, dsc->line_length);
+	    switch (rc) {
+		case CDSC_RESPONSE_OK:
+		    /* assume (atend) */
+		    /* we should mark it as deferred */
+		    break;
+		case CDSC_RESPONSE_CANCEL:
+		    /* ignore it */
+		    break;
+		case CDSC_RESPONSE_IGNORE_ALL:
+		    return CDSC_NOTDSC;
+	    }
+	}
+    }
+    else if (COMPARE(p, "(atend)")) {
+	if (dsc->scan_section != scan_comments)
+	    dsc_unknown(dsc);
+	/* do nothing */
+	/* we should mark it as deferred */
+    }
+    else {
+	ip = dsc_get_int(dsc->line+n, dsc->line_length-n, &i);
+        if (i) {
+	    n+=i;
+	    dsc->page_pages = ip;
+	    io = dsc_get_int(dsc->line+n, dsc->line_length-n, &i);
+	    if (i) {
+		/* DSC 2 uses extra integer to indicate page order */
+		/* DSC 3 uses %%PageOrder: */
+		if (dsc->page_order == CDSC_ORDER_UNKNOWN)
+		    switch (io) {
+			case -1:
+			    dsc->page_order = CDSC_DESCEND;
+			    break;
+			case 0:
+			    dsc->page_order = CDSC_SPECIAL;
+			    break;
+			case 1:
+			    dsc->page_order = CDSC_ASCEND;
+			    break;
+		    }
+	    }
+	}
+	else {
+	    int rc = dsc_error(dsc, CDSC_MESSAGE_INCORRECT_USAGE, dsc->line, 
+		dsc->line_length);
+	    switch (rc) {
+		case CDSC_RESPONSE_OK:
+		case CDSC_RESPONSE_CANCEL:
+		    /* ignore it */
+		    break;
+		case CDSC_RESPONSE_IGNORE_ALL:
+		    return CDSC_NOTDSC;
+	    }
+	}
+    }
+    return CDSC_OK;
+}
+
+static int 
+dsc_parse_bounding_box(CDSC *dsc, CDSCBBOX** pbbox, int offset)
+{
+    unsigned int i, n;
+    int llx, lly, urx, ury;
+    float fllx, flly, furx, fury;
+    char *p;
+    /* Process first %%BoundingBox: in comments, and last in trailer */
+    if ((*pbbox != NULL) && (dsc->scan_section == scan_comments)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		return CDSC_OK;	/* ignore duplicate comments in header */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    if ((*pbbox != NULL) && (dsc->scan_section == scan_pages)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		return CDSC_OK;	/* ignore duplicate comments in header */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    if ((*pbbox != NULL) && (dsc->scan_section == scan_trailer)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		break;		/* use duplicate comments in trailer */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    if (*pbbox != NULL) {
+	dsc_memfree(dsc, *pbbox);
+	*pbbox = NULL;
+    }
+
+    /* should only process first %%BoundingBox: */
+
+    while (IS_WHITE(dsc->line[offset]))
+	offset++;
+    p = dsc->line + offset;
+    
+    if (COMPARE(p, "atend")) {
+	if (dsc->scan_section == scan_trailer)
+	    dsc_unknown(dsc);
+	else {
+	    int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, dsc->line, 
+		    dsc->line_length);
+	    switch (rc) {
+		case CDSC_RESPONSE_OK:
+		    /* assume (atend) */
+		    /* we should mark it as deferred */
+		    break;
+		case CDSC_RESPONSE_CANCEL:
+		    /* ignore it */
+		    break;
+		case CDSC_RESPONSE_IGNORE_ALL:
+		    return CDSC_NOTDSC;
+	    }
+	}
+    }
+    else if (COMPARE(p, "(atend)")) {
+	if (dsc->scan_section == scan_trailer)
+	    dsc_unknown(dsc);
+	/* do nothing */
+	/* we should mark it as deferred */
+    }
+    else {
+        /* llx = */ lly = urx = ury = 0;
+	n = offset;
+	llx = dsc_get_int(dsc->line+n, dsc->line_length-n, &i);
+	n += i;
+	if (i)
+	    lly = dsc_get_int(dsc->line+n, dsc->line_length-n, &i);
+	n += i;
+	if (i)
+	    urx = dsc_get_int(dsc->line+n, dsc->line_length-n, &i);
+	n += i;
+	if (i)
+	    ury = dsc_get_int(dsc->line+n, dsc->line_length-n, &i);
+	if (i) {
+	    *pbbox = (CDSCBBOX *)dsc_memalloc(dsc, sizeof(CDSCBBOX));
+	    if (*pbbox == NULL)
+		return CDSC_ERROR;	/* no memory */
+	    (*pbbox)->llx = llx;
+	    (*pbbox)->lly = lly;
+	    (*pbbox)->urx = urx;
+	    (*pbbox)->ury = ury;
+	}
+	else {
+	    int rc = dsc_error(dsc, CDSC_MESSAGE_BBOX, dsc->line, 
+		dsc->line_length);
+	    switch (rc) {
+	      case CDSC_RESPONSE_OK:
+		/* fllx = */ flly = furx = fury = 0.0;
+		n = offset;
+		n += i;
+		fllx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+		n += i;
+		if (i)
+		    flly = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+		n += i;
+		if (i)
+		    furx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+		n += i;
+		if (i)
+		    fury = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+		if (i) {
+		    *pbbox = (CDSCBBOX *)dsc_memalloc(dsc, sizeof(CDSCBBOX));
+		    if (*pbbox == NULL)
+			return CDSC_ERROR;	/* no memory */
+			(*pbbox)->llx = (int)fllx;
+			(*pbbox)->lly = (int)flly;
+			(*pbbox)->urx = (int)(furx+0.999);
+			(*pbbox)->ury = (int)(fury+0.999);
+		}
+		return CDSC_OK;
+	    case CDSC_RESPONSE_CANCEL:
+		return CDSC_OK;
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	  }
+	}
+    }
+    return CDSC_OK;
+}
+
+static int 
+dsc_parse_float_bounding_box(CDSC *dsc, CDSCFBBOX** pbbox, int offset)
+{
+    unsigned int i, n;
+    float fllx, flly, furx, fury;
+    char *p;
+    /* Process first %%HiResBoundingBox: or %%CropBox: in comments, 
+     * and last in trailer.
+     */
+    if ((*pbbox != NULL) && (dsc->scan_section == scan_comments)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		return CDSC_OK;	/* ignore duplicate comments in header */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    if ((*pbbox != NULL) && (dsc->scan_section == scan_pages)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		return CDSC_OK;	/* ignore duplicate comments in header */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    if ((*pbbox != NULL) && (dsc->scan_section == scan_trailer)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		break;		/* use duplicate comments in trailer */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    if (*pbbox != NULL) {
+	dsc_memfree(dsc, *pbbox);
+	*pbbox = NULL;
+    }
+
+    /* should only process first %%BoundingBox: */
+
+    while (IS_WHITE(dsc->line[offset]))
+	offset++;
+    p = dsc->line + offset;
+    
+    if (COMPARE(p, "atend")) {
+	if (dsc->scan_section == scan_trailer)
+	    dsc_unknown(dsc);
+	else {
+	    int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, dsc->line, 
+		    dsc->line_length);
+	    switch (rc) {
+		case CDSC_RESPONSE_OK:
+		    /* assume (atend) */
+		    /* we should mark it as deferred */
+		    break;
+		case CDSC_RESPONSE_CANCEL:
+		    /* ignore it */
+		    break;
+		case CDSC_RESPONSE_IGNORE_ALL:
+		    return CDSC_NOTDSC;
+	    }
+	}
+    }
+    else if (COMPARE(p, "(atend)")) {
+	if (dsc->scan_section == scan_trailer)
+	    dsc_unknown(dsc);
+	/* do nothing */
+	/* we should mark it as deferred */
+    }
+    else {
+	/* fllx = */ flly = furx = fury = 0.0;
+	n = offset;
+	fllx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	n += i;
+	if (i)
+	    flly = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	n += i;
+	if (i)
+	    furx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	n += i;
+	if (i)
+	    fury = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	if (i) {
+	    *pbbox = (CDSCFBBOX *)dsc_memalloc(dsc, sizeof(CDSCFBBOX));
+	    if (*pbbox == NULL)
+		return CDSC_ERROR;	/* no memory */
+	    (*pbbox)->fllx = fllx;
+	    (*pbbox)->flly = flly;
+	    (*pbbox)->furx = furx;
+	    (*pbbox)->fury = fury;
+	}
+    }
+    return CDSC_OK;
+}
+
+static int 
+dsc_parse_orientation(CDSC *dsc, unsigned int *porientation, int offset)
+{
+    char *p;
+    if ((dsc->page_orientation != CDSC_ORIENT_UNKNOWN) && 
+	(dsc->scan_section == scan_comments)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		return CDSC_OK;	/* ignore duplicate comments in header */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    if ((dsc->page_orientation != CDSC_ORIENT_UNKNOWN) && 
+	(dsc->scan_section == scan_trailer)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		break;		/* use duplicate comments in header; */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    p = dsc->line + offset;
+    while (IS_WHITE(*p))
+	p++;
+    if (COMPARE(p, "atend")) {
+	if (dsc->scan_section == scan_trailer)
+	    dsc_unknown(dsc);
+	else {
+	    int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, 
+		dsc->line, dsc->line_length);
+	    switch (rc) {
+		case CDSC_RESPONSE_OK:
+		    /* assume (atend) */
+		    /* we should mark it as deferred */
+		    break;
+		case CDSC_RESPONSE_CANCEL:
+		    /* ignore it */
+		    break;
+		case CDSC_RESPONSE_IGNORE_ALL:
+		    return CDSC_NOTDSC;
+	    }
+	}
+    }
+    else if (COMPARE(p, "(atend)")) {
+	if (dsc->scan_section == scan_trailer)
+	    dsc_unknown(dsc);
+	/* do nothing */
+	/* we should mark it as deferred */
+    }
+    else if (COMPARE(p, "Portrait")) {
+	*porientation = CDSC_PORTRAIT;
+    }
+    else if (COMPARE(p, "Landscape")) {
+	*porientation = CDSC_LANDSCAPE;
+    }
+    else {
+	dsc_unknown(dsc);
+    }
+    return CDSC_OK;
+}
+
+static int 
+dsc_parse_order(CDSC *dsc)
+{
+    char *p;
+    if ((dsc->page_order != CDSC_ORDER_UNKNOWN) && 
+	(dsc->scan_section == scan_comments)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_COMMENT, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		return CDSC_OK;	/* ignore duplicate comments in header */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    if ((dsc->page_order != CDSC_ORDER_UNKNOWN) && 
+	(dsc->scan_section == scan_trailer)) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_DUP_TRAILER, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+	    case CDSC_RESPONSE_CANCEL:
+		break;		/* use duplicate comments in trailer */
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+
+    p = dsc->line + (IS_DSC(dsc->line, "%%+") ? 3 : 13);
+    while (IS_WHITE(*p))
+	p++;
+    if (COMPARE(p, "atend")) {
+	if (dsc->scan_section == scan_trailer)
+	    dsc_unknown(dsc);
+	else {
+	    int rc = dsc_error(dsc, CDSC_MESSAGE_ATEND, dsc->line, 
+		    dsc->line_length);
+	    switch (rc) {
+		case CDSC_RESPONSE_OK:
+		    /* assume (atend) */
+		    /* we should mark it as deferred */
+		    break;
+		case CDSC_RESPONSE_CANCEL:
+		    /* ignore it */
+		    break;
+		case CDSC_RESPONSE_IGNORE_ALL:
+		    return CDSC_NOTDSC;
+	    }
+	}
+    }
+    else if (COMPARE(p, "(atend)")) {
+	if (dsc->scan_section == scan_trailer)
+	    dsc_unknown(dsc);
+	/* do nothing */
+	/* we should mark it as deferred */
+    }
+    else if (COMPARE(p, "Ascend")) {
+	dsc->page_order = CDSC_ASCEND;
+    }
+    else if (COMPARE(p, "Descend")) {
+	dsc->page_order = CDSC_DESCEND;
+    }
+    else if (COMPARE(p, "Special")) {
+	dsc->page_order = CDSC_SPECIAL;
+    }
+    else {
+	dsc_unknown(dsc);
+    }
+    return CDSC_OK;
+}
+
+
+static int 
+dsc_parse_media(CDSC *dsc, const CDSCMEDIA **page_media)
+{
+    char media_name[MAXSTR];
+    int n = IS_DSC(dsc->line, "%%+") ? 3 : 12; /* %%PageMedia: */
+    unsigned int i;
+
+    if (dsc_copy_string(media_name, sizeof(media_name)-1, 
+	dsc->line+n, dsc->line_length-n, NULL)) {
+	for (i=0; i<dsc->media_count; i++) {
+	    if (dsc->media[i]->name && 
+		(dsc_stricmp(media_name, dsc->media[i]->name) == 0)) {
+		*page_media = dsc->media[i];
+		return CDSC_OK;
+	    }
+	}
+    }
+    dsc_unknown(dsc);
+    
+    return CDSC_OK;
+}
+
+
+static int 
+dsc_parse_document_media(CDSC *dsc)
+{
+    unsigned int i, n;
+    CDSCMEDIA lmedia;
+    GSBOOL blank_line;
+
+    if (IS_DSC(dsc->line, "%%DocumentMedia:"))
+	n = 16;
+    else if (IS_DSC(dsc->line, "%%+"))
+	n = 3;
+    else
+	return CDSC_ERROR;	/* error */
+
+    /* check for blank remainder of line */
+    blank_line = TRUE;
+    for (i=n; i<dsc->line_length; i++) {
+	if (!IS_WHITE_OR_EOL(dsc->line[i])) {
+	    blank_line = FALSE;
+	    break;
+	}
+    }
+
+    if (!blank_line) {
+	char name[MAXSTR];
+	char colour[MAXSTR];
+	char type[MAXSTR];
+	lmedia.name = lmedia.colour = lmedia.type = (char *)NULL;
+	lmedia.width = lmedia.height = lmedia.weight = 0;
+	lmedia.mediabox = (CDSCBBOX *)NULL;
+	lmedia.name = dsc_copy_string(name, sizeof(name),
+		dsc->line+n, dsc->line_length-n, &i);
+	n+=i;
+	if (i)
+	    lmedia.width = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	n+=i;
+	if (i)
+	    lmedia.height = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	n+=i;
+	if (i)
+	    lmedia.weight = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	n+=i;
+	if (i)
+	    lmedia.colour = dsc_copy_string(colour, sizeof(colour),
+		dsc->line+n, dsc->line_length-n, &i);
+	n+=i;
+	if (i)
+	    lmedia.type = dsc_copy_string(type, sizeof(type),
+		dsc->line+n, dsc->line_length-n, &i);
+
+	if (i==0)
+	    dsc_unknown(dsc); /* we didn't get all fields */
+	else {
+	    if (dsc_add_media(dsc, &lmedia))
+		return CDSC_ERROR;	/* out of memory */
+	}
+    }
+    return CDSC_OK;
+}
+
+/* viewing orientation is believed to be the first four elements of
+ * a CTM matrix
+ */
+static int 
+dsc_parse_viewing_orientation(CDSC *dsc, CDSCCTM **pctm)
+{
+    CDSCCTM ctm;
+    unsigned int i, n;
+
+    if (*pctm != NULL) {
+	dsc_memfree(dsc, *pctm);
+	*pctm = NULL;
+    }
+
+    n = IS_DSC(dsc->line, "%%+") ? 3 : 21;  /* %%ViewingOrientation: */
+    while (IS_WHITE(dsc->line[n]))
+	n++;
+
+    /* ctm.xx = */ ctm.xy = ctm.yx = ctm.yy = 0.0;
+    ctm.xx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+    n += i;
+    if (i)
+        ctm.xy = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+    n += i;
+    if (i)
+        ctm.yx = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+    n += i;
+    if (i)
+        ctm.yy = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+    if (i==0) {
+	dsc_unknown(dsc); /* we didn't get all fields */
+    }
+    else {
+	*pctm = (CDSCCTM *)dsc_memalloc(dsc, sizeof(CDSCCTM));
+	if (*pctm == NULL)
+	    return CDSC_ERROR;	/* no memory */
+	**pctm = ctm;
+    }
+    return CDSC_OK;
+}
+   
+
+/* This is called before dsc_read_line(), since we may
+ * need to skip a binary header which contains a new line
+ * character
+ */
+static int 
+dsc_scan_type(CDSC *dsc)
+{
+    unsigned char *p;
+    unsigned char *line = (unsigned char *)(dsc->data + dsc->data_index);
+    int length = dsc->data_length - dsc->data_index;
+
+    /* Types that should be known:
+     *   DSC
+     *   EPSF
+     *   PJL + any of above
+     *   ^D + any of above
+     *   DOS EPS
+     *   PDF
+     *   non-DSC
+     */
+
+    /* First process any non PostScript headers */
+    /* At this stage we do not have a complete line */
+
+    if (length == 0)
+	return CDSC_NEEDMORE;
+
+    /* If we have already found a DOS EPS header, */
+    /* ignore all until the PostScript section */
+    if (dsc->skip_bytes) {
+	int cnt = min(dsc->skip_bytes,
+		     (int)(dsc->data_length - dsc->data_index));
+	dsc->skip_bytes -= cnt;
+	dsc->data_index += cnt;
+	length -= cnt;
+	line += cnt;
+	if (dsc->skip_bytes != 0)
+	    return CDSC_NEEDMORE;
+    }
+
+    if (dsc->skip_pjl) {
+	/* skip until first PostScript comment */
+	while (length >= 2) {
+	    while (length && !IS_EOL(line[0])) {
+		/* skip until EOL character */
+		line++;
+		dsc->data_index++;
+		length--;
+	    }
+	    while ((length >= 2) && IS_EOL(line[0]) && IS_EOL(line[1])) {
+		/* skip until EOL followed by non-EOL */
+		line++;
+		dsc->data_index++;
+		length--;
+	    }
+	    if (length < 2)
+		return CDSC_NEEDMORE;
+
+	    if (IS_EOL(line[0]) && line[1]=='%') {
+		line++;
+		dsc->data_index++;
+		length--;
+		dsc->skip_pjl = FALSE;
+		break;
+	    }
+	    else {
+		line++;
+		dsc->data_index++;
+		length--;
+	    }
+	}
+	if (dsc->skip_pjl)
+	    return CDSC_NEEDMORE;
+    }
+
+    if (length == 0)
+	return CDSC_NEEDMORE;
+
+    if (line[0] == '\004') {
+	line++;
+	dsc->data_index++;
+	length--;
+	dsc->ctrld = TRUE;
+    }
+
+    if (line[0] == '\033') {
+	/* possibly PJL */
+	if (length < 9)
+	    return CDSC_NEEDMORE;
+	if (COMPARE(line, "\033%-12345X")) {
+	    dsc->skip_pjl = TRUE;  /* skip until first PostScript comment */
+	    dsc->pjl = TRUE;
+	    dsc->data_index += 9;
+	    return dsc_scan_type(dsc);
+	}
+    }
+
+    if ((line[0]==0x0) && (length < 2))
+	return CDSC_NEEDMORE;	/* Could be Mac Binary EPSF */
+    if ((line[0]==0x0) && (line[1] >= 1) && (line[1] <= 63) && (length < 128))
+	return CDSC_NEEDMORE;	/* Could be Mac Binary EPSF */
+    if ((line[0]==0x0) && (line[1] == 0x5) && (length < 4))
+	return CDSC_NEEDMORE;	/* Could be Mac AppleSingle/AppleDouble */
+    if ((line[0]==0xc5) && (length < 4))
+	return CDSC_NEEDMORE;	/* Could be DOS EPS */
+
+    if ((line[0]==0xc5) && (line[1]==0xd0) && 
+	 (line[2]==0xd3) && (line[3]==0xc6) ) {
+	/* id is "EPSF" with bit 7 set */
+	/* read DOS EPS header, then ignore all bytes until the PS section */
+	if (length < 30)
+	    return CDSC_NEEDMORE;
+	dsc->line = (char *)line;
+	if (dsc_read_doseps(dsc))
+	    return CDSC_ERROR;
+    }
+    else if ((line[0]==0x0) && (line[1]==0x05) && 
+	 (line[2]==0x16) && ((line[3]==0x0) || (line[3] == 0x07))) {
+	/* Mac AppleSingle or AppleDouble */
+	GSDWORD version;
+	GSWORD entries;
+	if (length < 26)
+	    return CDSC_NEEDMORE;
+	version = dsc_get_bigendian_dword(line+4);
+	entries = dsc_get_bigendian_word(line+24);
+	if ((version == 0x00010000) || (version == 0x00020000)) {
+	    if (length < (int)(26 + entries * 12))
+		return CDSC_NEEDMORE;
+	    dsc->line = (char *)line;
+	    if (dsc_read_applesingle(dsc))
+		return CDSC_ERROR;
+	}
+    }
+    else if ((line[0]==0x0) && 
+	(line[1] >= 1) && (line[1] <= 63) && 
+        (line[74]==0x0) && 
+        (line[65]=='E') && (line[66]=='P') && 
+        (line[67]=='S') && (line[68]=='F')) {
+	/* Mac Binary EPSF */
+	dsc->line = (char *)line;
+	if (dsc_read_macbin(dsc))
+	    return CDSC_ERROR;
+    }
+    else {
+	if (length < 2)
+	    return CDSC_NEEDMORE;
+	if ((line[0] == '%') && (line[1] == 'P')) {
+	    if (length < 5)
+	        return CDSC_NEEDMORE;
+	    if (COMPARE(line, "%PDF-")) {
+		dsc->pdf = TRUE;
+		dsc->scan_section = scan_comments;
+		return CDSC_OK;
+	    }
+	}
+    }
+
+    /* Finally process PostScript headers */
+
+    if (dsc_read_line(dsc) <= 0)
+	return CDSC_NEEDMORE;
+	
+    dsc->dsc_version = dsc_add_line(dsc, dsc->line, dsc->line_length);
+    if (COMPARE(dsc->line, "%!PS-Adobe")) {
+	dsc->dsc = TRUE;
+	dsc->begincomments = DSC_START(dsc);
+	if (dsc->dsc_version == NULL)
+	    return CDSC_ERROR;	/* no memory */
+	p = (unsigned char *)dsc->line + 14;
+	while (IS_WHITE(*p))
+	    p++;
+	if (COMPARE(p, "EPSF-"))
+	    dsc->epsf = TRUE;
+	dsc->scan_section = scan_comments;
+	return CDSC_PSADOBE;
+    }
+    if (COMPARE(dsc->line, "%!")) {
+	dsc->scan_section = scan_comments;
+	return CDSC_NOTDSC;
+    }
+
+    dsc->scan_section = scan_comments;
+    return CDSC_NOTDSC;	/* unrecognised */
+}
+
+
+
+static int 
+dsc_scan_comments(CDSC *dsc)
+{
+    /* Comments section ends at */
+    /*  %%EndComments */
+    /*  another section */
+    /*  line that does not start with %% */
+    /* Save a few important lines */
+
+    char *line = dsc->line;
+    GSBOOL continued = FALSE;
+    dsc->id = CDSC_OK;
+    if (IS_DSC(line, "%%EndComments")) {
+	dsc->id = CDSC_ENDCOMMENTS;
+	dsc->endcomments = DSC_END(dsc);
+	dsc->scan_section = scan_pre_preview;
+	return CDSC_OK;
+    }
+    else if (IS_DSC(line, "%%BeginComments")) {
+	/* ignore because we are in this section */
+	dsc->id = CDSC_BEGINCOMMENTS;
+    }
+    else if (dsc_is_section(line)) {
+	dsc->endcomments = DSC_START(dsc);
+	dsc->scan_section = scan_pre_preview;
+	return CDSC_PROPAGATE;
+    }
+    else if (line[0] == '%' && IS_WHITE_OR_EOL(line[1])) {
+	dsc->endcomments = DSC_START(dsc);
+	dsc->scan_section = scan_pre_preview;
+	return CDSC_PROPAGATE;
+    }
+    else if (line[0] != '%') {
+	dsc->id = CDSC_OK;
+	dsc->endcomments = DSC_START(dsc);
+	dsc->scan_section = scan_pre_preview;
+	return CDSC_PROPAGATE;
+    }
+    else if (IS_DSC(line, "%%Begin")) {
+	dsc->endcomments = DSC_START(dsc);
+	dsc->scan_section = scan_pre_preview;
+	return CDSC_PROPAGATE;
+    }
+
+    /* Handle continuation lines.
+     * To simply processing, we assume that contination lines 
+     * will only occur if repeat parameters are allowed and that 
+     * a complete set of these parameters appears on each line.  
+     * This is more restrictive than the DSC specification, but
+     * is valid for the DSC comments understood by this parser
+     * for all documents that we have seen.
+     */
+    if (IS_DSC(line, "%%+")) {
+	line = dsc->last_line;
+	continued = TRUE;
+    }
+    else
+	dsc_save_line(dsc);
+
+    if (IS_DSC(line, "%%Pages:")) {
+	dsc->id = CDSC_PAGES;
+	if (dsc_parse_pages(dsc) != 0)
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%Creator:")) {
+	dsc->id = CDSC_CREATOR;
+	dsc->dsc_creator = dsc_add_line(dsc, dsc->line+10, dsc->line_length-10);
+	if (dsc->dsc_creator==NULL)
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%CreationDate:")) {
+	dsc->id = CDSC_CREATIONDATE;
+	dsc->dsc_date = dsc_add_line(dsc, dsc->line+15, dsc->line_length-15);
+	if (dsc->dsc_date==NULL)
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%Title:")) {
+	dsc->id = CDSC_TITLE;
+	dsc->dsc_title = dsc_add_line(dsc, dsc->line+8, dsc->line_length-8);
+	if (dsc->dsc_title==NULL)
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%For:")) {
+	dsc->id = CDSC_FOR;
+	dsc->dsc_for = dsc_add_line(dsc, dsc->line+6, dsc->line_length-6);
+	if (dsc->dsc_for==NULL)
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%LanguageLevel:")) {
+	unsigned int n = continued ? 3 : 16;
+	unsigned int i;
+	int ll;
+	dsc->id = CDSC_LANGUAGELEVEL;
+	ll = dsc_get_int(dsc->line+n, dsc->line_length-n, &i);
+	if (i) {
+	    if ( (ll==1) || (ll==2) || (ll==3) )
+		dsc->language_level = ll;
+	    else {
+		dsc_unknown(dsc);
+	    }
+	}
+	else 
+	    dsc_unknown(dsc);
+    }
+    else if (IS_DSC(line, "%%BoundingBox:")) {
+	dsc->id = CDSC_BOUNDINGBOX;
+	if (dsc_parse_bounding_box(dsc, &(dsc->bbox), continued ? 3 : 14))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%HiResBoundingBox:")) {
+	dsc->id = CDSC_HIRESBOUNDINGBOX;
+	if (dsc_parse_float_bounding_box(dsc, &(dsc->hires_bbox), 
+	    continued ? 3 : 19))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%CropBox:")) {
+	dsc->id = CDSC_CROPBOX;
+	if (dsc_parse_float_bounding_box(dsc, &(dsc->crop_box), 
+	    continued ? 3 : 10))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%Orientation:")) {
+	dsc->id = CDSC_ORIENTATION;
+	if (dsc_parse_orientation(dsc, &(dsc->page_orientation), 
+		continued ? 3 : 14))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%PageOrder:")) {
+	dsc->id = CDSC_PAGEORDER;
+	if (dsc_parse_order(dsc))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%DocumentMedia:")) {
+	dsc->id = CDSC_DOCUMENTMEDIA;
+	if (dsc_parse_document_media(dsc))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%DocumentPaperSizes:")) {
+	/* DSC 2.1 */
+	unsigned int n = continued ? 3 : 21;
+	unsigned int count = 0;
+	unsigned int i = 1;
+	char name[MAXSTR];
+	char *p;
+	dsc->id = CDSC_DOCUMENTPAPERSIZES;
+	while (i && (dsc->line[n]!='\r') && (dsc->line[n]!='\n')) {
+	    p = dsc_copy_string(name, sizeof(name)-1,
+		    dsc->line+n, dsc->line_length-n, &i);
+	    if (i && p) {
+		const CDSCMEDIA *m = dsc_known_media;
+		if (count >= dsc->media_count) {
+		    /* set some default values */
+		    CDSCMEDIA lmedia;
+		    lmedia.name = p;
+		    lmedia.width = 595.0;
+		    lmedia.height = 842.0;
+		    lmedia.weight = 80.0;
+		    lmedia.colour = NULL;
+		    lmedia.type = NULL;
+		    lmedia.mediabox = NULL;
+		    if (dsc_add_media(dsc, &lmedia))
+			return CDSC_ERROR;
+		}
+		else
+		    dsc->media[count]->name = 
+			dsc_alloc_string(dsc, p, (int)strlen(p));
+		/* find in list of known media */
+		while (m && m->name) {
+		    if (dsc_stricmp(p, m->name)==0) {
+			dsc->media[count]->width = m->width;
+			dsc->media[count]->height = m->height;
+			break;
+		    }
+		    m++;
+		}
+	    }
+	    n+=i;
+	    count++;
+	}
+    }
+    else if (IS_DSC(line, "%%DocumentPaperForms:")) {
+	/* DSC 2.1 */
+	unsigned int n = continued ? 3 : 21;
+	unsigned int count = 0;
+	unsigned int i = 1;
+	char type[MAXSTR];
+	char *p;
+	dsc->id = CDSC_DOCUMENTPAPERFORMS;
+	while (i && (dsc->line[n]!='\r') && (dsc->line[n]!='\n')) {
+	    p = dsc_copy_string(type, sizeof(type)-1,
+		    dsc->line+n, dsc->line_length-n, &i);
+	    if (i && p) {
+		if (count >= dsc->media_count) {
+		    /* set some default values */
+		    CDSCMEDIA lmedia;
+		    lmedia.name = NULL;
+		    lmedia.width = 595.0;
+		    lmedia.height = 842.0;
+		    lmedia.weight = 80.0;
+		    lmedia.colour = NULL;
+		    lmedia.type = p;
+		    lmedia.mediabox = NULL;
+		    if (dsc_add_media(dsc, &lmedia))
+			return CDSC_ERROR;
+		}
+		else
+		    dsc->media[count]->type = 
+			dsc_alloc_string(dsc, p, (int)strlen(p));
+	    }
+	    n+=i;
+	    count++;
+	}
+    }
+    else if (IS_DSC(line, "%%DocumentPaperColors:")) {
+	/* DSC 2.1 */
+	unsigned int n = continued ? 3 : 22;
+	unsigned int count = 0;
+	unsigned int i = 1;
+	char colour[MAXSTR];
+	char *p;
+	dsc->id = CDSC_DOCUMENTPAPERCOLORS;
+	while (i && (dsc->line[n]!='\r') && (dsc->line[n]!='\n')) {
+	    p = dsc_copy_string(colour, sizeof(colour)-1, 
+		    dsc->line+n, dsc->line_length-n, &i);
+	    if (i && p) {
+		if (count >= dsc->media_count) {
+		    /* set some default values */
+		    CDSCMEDIA lmedia;
+		    lmedia.name = NULL;
+		    lmedia.width = 595.0;
+		    lmedia.height = 842.0;
+		    lmedia.weight = 80.0;
+		    lmedia.colour = p;
+		    lmedia.type = NULL;
+		    lmedia.mediabox = NULL;
+		    if (dsc_add_media(dsc, &lmedia))
+			return CDSC_ERROR;
+		}
+		else
+		    dsc->media[count]->colour = 
+			dsc_alloc_string(dsc, p, (int)strlen(p));
+	    }
+	    n+=i;
+	    count++;
+	}
+    }
+    else if (IS_DSC(line, "%%DocumentPaperWeights:")) {
+	/* DSC 2.1 */
+	unsigned int n = continued ? 3 : 23;
+	unsigned int count = 0;
+	unsigned int i = 1;
+	float w;
+	dsc->id = CDSC_DOCUMENTPAPERWEIGHTS;
+	while (i && (dsc->line[n]!='\r') && (dsc->line[n]!='\n')) {
+	    w = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	    if (i) {
+		if (count >= dsc->media_count) {
+		    /* set some default values */
+		    CDSCMEDIA lmedia;
+		    lmedia.name = NULL;
+		    lmedia.width = 595.0;
+		    lmedia.height = 842.0;
+		    lmedia.weight = w;
+		    lmedia.colour = NULL;
+		    lmedia.type = NULL;
+		    lmedia.mediabox = NULL;
+		    if (dsc_add_media(dsc, &lmedia))
+			return CDSC_ERROR;
+		}
+		else
+		    dsc->media[count]->weight = w;
+	    }
+	    n+=i;
+	    count++;
+	}
+    }
+    else if (IS_DSC(line, "%%DocumentData:")) {
+	unsigned int n = continued ? 3 : 15;
+	char *p = dsc->line + n;
+        while (IS_WHITE(*p))
+	    p++;
+	dsc->id = CDSC_DOCUMENTDATA;
+	if (COMPARE(p, "Clean7Bit"))
+	    dsc->document_data = CDSC_CLEAN7BIT;
+	else if (COMPARE(p, "Clean8Bit"))
+	    dsc->document_data = CDSC_CLEAN8BIT;
+	else if (COMPARE(p, "Binary"))
+	    dsc->document_data = CDSC_BINARY;
+	else
+	    dsc_unknown(dsc);
+    }
+    else if (IS_DSC(line, "%%Requirements:")) {
+	dsc->id = CDSC_REQUIREMENTS;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%DocumentNeededFonts:")) {
+	dsc->id = CDSC_DOCUMENTNEEDEDFONTS;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%DocumentSuppliedFonts:")) {
+	dsc->id = CDSC_DOCUMENTSUPPLIEDFONTS;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%PlateFile:")) {
+	dsc->id = CDSC_PLATEFILE;
+	if (dsc_parse_platefile(dsc) != CDSC_OK)
+	    dsc->id = CDSC_UNKNOWNDSC;
+    }
+    else if (IS_DSC(line, "%%CyanPlate:") || 
+	IS_DSC(line, "%%MagentaPlate:") || 
+	IS_DSC(line, "%%YellowPlate:") ||
+	IS_DSC(line, "%%BlackPlate:")) {
+	dsc->id = CDSC_PLATEFILE;
+	if (dsc_parse_dcs1plate(dsc) != CDSC_OK)
+	    dsc->id = CDSC_UNKNOWNDSC;
+    }
+    else if (IS_DSC(line, "%%DocumentProcessColors:")) {
+	dsc->id = CDSC_DOCUMENTPROCESSCOLORS;
+	if (dsc_parse_process_colours(dsc) != CDSC_OK)
+	    dsc->id = CDSC_UNKNOWNDSC;
+    }
+    else if (IS_DSC(line, "%%DocumentCustomColors:")) {
+	dsc->id = CDSC_DOCUMENTCUSTOMCOLORS;
+	if (dsc_parse_custom_colours(dsc) != CDSC_OK)
+	    dsc->id = CDSC_UNKNOWNDSC;
+    }
+    else if (IS_DSC(line, "%%CMYKCustomColor:")) {
+	dsc->id = CDSC_CMYKCUSTOMCOLOR;
+	if (dsc_parse_cmyk_custom_colour(dsc) != CDSC_OK)
+	    dsc->id = CDSC_UNKNOWNDSC;
+    }
+    else if (IS_DSC(line, "%%RGBCustomColor:")) {
+	dsc->id = CDSC_RGBCUSTOMCOLOR;
+	if (dsc_parse_rgb_custom_colour(dsc) != CDSC_OK)
+	    dsc->id = CDSC_UNKNOWNDSC;
+    }
+    else if (dsc->line[0] == '%' && IS_WHITE_OR_EOL(dsc->line[1])) {
+	dsc->id = CDSC_OK;
+	/* ignore */
+    }
+    else {
+	dsc->id = CDSC_UNKNOWNDSC;
+	dsc_unknown(dsc);
+    }
+
+    dsc->endcomments = DSC_END(dsc);
+    return CDSC_OK;
+}
+
+
+static int 
+dsc_scan_preview(CDSC *dsc)
+{
+    /* Preview section ends at */
+    /*  %%EndPreview */
+    /*  another section */
+    /* Preview section must start with %%BeginPreview */
+    char *line = dsc->line;
+    dsc->id = CDSC_OK;
+
+    if (dsc->scan_section == scan_pre_preview) {
+	if (IS_BLANK(line))
+	    return CDSC_OK;	/* ignore blank lines before preview */
+	else if (IS_DSC(line, "%%BeginPreview")) {
+	    dsc->id = CDSC_BEGINPREVIEW;
+	    dsc->beginpreview = DSC_START(dsc);
+	    dsc->endpreview = DSC_END(dsc);
+	    dsc->scan_section = scan_preview;
+	    /* Don't mark the preview as EPSI if a DOS EPS header is present */
+	    if (dsc->preview == CDSC_NOPREVIEW)
+		dsc->preview = CDSC_EPSI;
+	    return CDSC_OK;
+	}
+	else {
+	    dsc->scan_section = scan_pre_defaults;
+	    return CDSC_PROPAGATE;
+	}
+    }
+
+    if (IS_DSC(line, "%%BeginPreview")) {
+	/* ignore because we are in this section */
+    }
+    else if (dsc_is_section(line)) {
+	dsc->endpreview = DSC_START(dsc);
+	dsc->scan_section = scan_pre_defaults;
+	return CDSC_PROPAGATE;
+    }
+    else if (IS_DSC(line, "%%EndPreview")) {
+	dsc->id = CDSC_ENDPREVIEW;
+	dsc->endpreview = DSC_END(dsc);
+	dsc->scan_section = scan_pre_defaults;
+	return CDSC_OK;
+    }
+    else if (line[0] == '%' && line[1] != '%') {
+	/* Ordinary comments are OK */
+    }
+    else {
+	dsc->id = CDSC_UNKNOWNDSC;
+	/* DSC comments should not occur in preview */
+	dsc_unknown(dsc);
+    }
+
+    dsc->endpreview = DSC_END(dsc);
+    return CDSC_OK;
+}
+
+static int
+dsc_scan_defaults(CDSC *dsc)
+{
+    /* Defaults section ends at */
+    /*  %%EndDefaults */
+    /*  another section */
+    /* Defaults section must start with %%BeginDefaults */
+    char *line = dsc->line;
+    dsc->id = CDSC_OK;
+
+    if (dsc->scan_section == scan_pre_defaults) {
+	if (IS_BLANK(line))
+	    return CDSC_OK;	/* ignore blank lines before defaults */
+	else if (IS_DSC(line, "%%BeginDefaults")) {
+	    dsc->id = CDSC_BEGINDEFAULTS;
+	    dsc->begindefaults = DSC_START(dsc);
+	    dsc->enddefaults = DSC_END(dsc);
+	    dsc->scan_section = scan_defaults;
+	    return CDSC_OK;
+	}
+	else {
+	    dsc->scan_section = scan_pre_prolog;
+	    return CDSC_PROPAGATE;
+	}
+    }
+
+    if (NOT_DSC_LINE(line)) {
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%BeginPreview")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (IS_DSC(line, "%%BeginDefaults")) {
+	/* ignore because we are in this section */
+    }
+    else if (dsc_is_section(line)) {
+	dsc->enddefaults = DSC_START(dsc);
+	dsc->scan_section = scan_pre_prolog;
+	return CDSC_PROPAGATE;
+    }
+    else if (IS_DSC(line, "%%EndDefaults")) {
+	dsc->id = CDSC_ENDDEFAULTS;
+	dsc->enddefaults = DSC_END(dsc);
+	dsc->scan_section = scan_pre_prolog;
+	return CDSC_OK;
+    }
+    else if (IS_DSC(line, "%%PageMedia:")) {
+	dsc->id = CDSC_PAGEMEDIA;
+	dsc_parse_media(dsc, &dsc->page_media);
+    }
+    else if (IS_DSC(line, "%%PageOrientation:")) {
+	dsc->id = CDSC_PAGEORIENTATION;
+	/* This can override %%Orientation:  */
+	if (dsc_parse_orientation(dsc, &(dsc->page_orientation), 18))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%PageBoundingBox:")) {
+	dsc->id = CDSC_PAGEBOUNDINGBOX;
+	if (dsc_parse_bounding_box(dsc, &(dsc->page_bbox), 18))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%ViewingOrientation:")) {
+	dsc->id = CDSC_VIEWINGORIENTATION;
+	if (dsc_parse_viewing_orientation(dsc, &dsc->viewing_orientation))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%PageCropBox:")) {
+	dsc->id = CDSC_PAGECROPBOX;
+	if (dsc_parse_float_bounding_box(dsc, &dsc->crop_box, 14))
+	    return CDSC_ERROR;
+    }
+    else {
+	dsc->id = CDSC_UNKNOWNDSC;
+	/* All other DSC comments are unknown, but not an error */
+	dsc_unknown(dsc);
+    }
+    dsc->enddefaults = DSC_END(dsc);
+    return CDSC_OK;
+}
+
+/* CDSC_RESPONSE_OK and CDSC_RESPONSE_CANCEL mean ignore the 
+ * mismatch (default) */
+static int
+dsc_check_match_prompt(CDSC *dsc, const char *str, int count)
+{
+    if (count != 0) {
+	char buf[MAXSTR+MAXSTR];
+	if (dsc->line_length < (unsigned int)(sizeof(buf)/2-1))  {
+	    strncpy(buf, dsc->line, dsc->line_length);
+	    buf[dsc->line_length] = '\0';
+	}
+	sprintf(buf+strlen(buf), "\n%%%%Begin%.40s: / %%%%End%.40s\n", str, str);
+	return dsc_error(dsc, CDSC_MESSAGE_BEGIN_END, buf, (int)strlen(buf));
+    }
+    return CDSC_RESPONSE_CANCEL;
+}
+
+static int
+dsc_check_match_type(CDSC *dsc, const char *str, int count)
+{
+    if (dsc_check_match_prompt(dsc, str, count) == CDSC_RESPONSE_IGNORE_ALL)
+	return CDSC_NOTDSC;
+    return CDSC_OK;
+}
+
+/* complain if Begin/End blocks didn't match */
+/* return non-zero if we should ignore all DSC */
+static int
+dsc_check_match(CDSC *dsc)
+{
+    int rc = 0;
+    const char *font = "Font";
+    const char *feature = "Feature";
+    const char *resource = "Resource";
+    const char *procset = "ProcSet";
+
+    if (!rc)
+	rc = dsc_check_match_type(dsc, font, dsc->begin_font_count);
+    if (!rc)
+	rc = dsc_check_match_type(dsc, feature, dsc->begin_feature_count);
+    if (!rc)
+	rc = dsc_check_match_type(dsc, resource, dsc->begin_resource_count);
+    if (!rc)
+	rc = dsc_check_match_type(dsc, procset, dsc->begin_procset_count);
+
+    dsc->begin_font_count = 0;
+    dsc->begin_feature_count = 0;
+    dsc->begin_resource_count = 0;
+    dsc->begin_procset_count = 0;
+    return rc;
+}
+
+
+static int 
+dsc_scan_prolog(CDSC *dsc)
+{
+    /* Prolog section ends at */
+    /*  %%EndProlog */
+    /*  another section */
+    /* Prolog section may start with %%BeginProlog or non-dsc line */
+    char *line = dsc->line;
+    dsc->id = CDSC_OK;
+
+    if (dsc->scan_section == scan_pre_prolog) {
+        if (dsc_is_section(line) && (!IS_DSC(line, "%%BeginProlog"))) {
+	    dsc->scan_section = scan_pre_setup;
+	    return CDSC_PROPAGATE;
+	}
+	dsc->id = CDSC_BEGINPROLOG;
+	dsc->beginprolog = DSC_START(dsc);
+	dsc->endprolog = DSC_END(dsc);
+	dsc->scan_section = scan_prolog;
+	if (IS_DSC(line, "%%BeginProlog"))
+	    return CDSC_OK;
+    }
+   
+    if (NOT_DSC_LINE(line)) {
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%BeginPreview")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (IS_DSC(line, "%%BeginDefaults")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (IS_DSC(line, "%%BeginProlog")) {
+	/* ignore because we are in this section */
+    }
+    else if (dsc_is_section(line)) {
+	dsc->endprolog = DSC_START(dsc);
+	dsc->scan_section = scan_pre_setup;
+	if (dsc_check_match(dsc))
+	    return CDSC_NOTDSC;
+	return CDSC_PROPAGATE;
+    }
+    else if (IS_DSC(line, "%%EndProlog")) {
+	dsc->id = CDSC_ENDPROLOG;
+	dsc->endprolog = DSC_END(dsc);
+	dsc->scan_section = scan_pre_setup;
+	if (dsc_check_match(dsc))
+	    return CDSC_NOTDSC;
+	return CDSC_OK;
+    }
+    else if (IS_DSC(line, "%%BeginFont:")) {
+	dsc->id = CDSC_BEGINFONT;
+	/* ignore Begin/EndFont, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_font_count++;
+    }
+    else if (IS_DSC(line, "%%EndFont")) {
+	dsc->id = CDSC_ENDFONT;
+	dsc->begin_font_count--;
+    }
+    else if (IS_DSC(line, "%%BeginFeature:")) {
+	dsc->id = CDSC_BEGINFEATURE;
+	/* ignore Begin/EndFeature, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_feature_count++;
+    }
+    else if (IS_DSC(line, "%%EndFeature")) {
+	dsc->id = CDSC_ENDFEATURE;
+	dsc->begin_feature_count--;
+    }
+    else if (IS_DSC(line, "%%BeginResource:")) {
+	dsc->id = CDSC_BEGINRESOURCE;
+	/* ignore Begin/EndResource, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_resource_count++;
+    }
+    else if (IS_DSC(line, "%%EndResource")) {
+	dsc->id = CDSC_ENDRESOURCE;
+	dsc->begin_resource_count--;
+    }
+    else if (IS_DSC(line, "%%BeginProcSet:")) {
+	dsc->id = CDSC_BEGINPROCSET;
+	/* ignore Begin/EndProcSet, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_procset_count++;
+    }
+    else if (IS_DSC(line, "%%EndProcSet")) {
+	dsc->id = CDSC_ENDPROCSET;
+	dsc->begin_procset_count--;
+    }
+    else {
+	/* All other DSC comments are unknown, but not an error */
+	dsc->id = CDSC_UNKNOWNDSC;
+	dsc_unknown(dsc);
+    }
+
+    dsc->endprolog = DSC_END(dsc);
+    return CDSC_OK;
+}
+
+static int
+dsc_scan_setup(CDSC *dsc)
+{
+    /* Setup section ends at */
+    /*  %%EndSetup */
+    /*  another section */
+    /* Setup section must start with %%BeginSetup */
+
+    char *line = dsc->line;
+    dsc->id = CDSC_OK;
+
+    if (dsc->scan_section == scan_pre_setup) {
+	if (IS_BLANK(line))
+	    return CDSC_OK;	/* ignore blank lines before setup */
+	else if (IS_DSC(line, "%%BeginSetup")) {
+	    dsc->id = CDSC_BEGINSETUP;
+	    dsc->beginsetup = DSC_START(dsc);
+	    dsc->endsetup = DSC_END(dsc);
+	    dsc->scan_section = scan_setup;
+	    return CDSC_OK;
+	}
+	else {
+	    dsc->scan_section = scan_pre_pages;
+	    return CDSC_PROPAGATE;
+	}
+    }
+
+    if (NOT_DSC_LINE(line)) {
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%BeginPreview")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (IS_DSC(line, "%%BeginDefaults")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (IS_DSC(line, "%%BeginProlog")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (IS_DSC(line, "%%BeginSetup")) {
+	/* ignore because we are in this section */
+    }
+    else if (dsc_is_section(line)) {
+	dsc->endsetup = DSC_START(dsc);
+	dsc->scan_section = scan_pre_pages;
+	if (dsc_check_match(dsc))
+	    return CDSC_NOTDSC;
+	return CDSC_PROPAGATE;
+    }
+    else if (IS_DSC(line, "%%EndSetup")) {
+	dsc->id = CDSC_ENDSETUP;
+	dsc->endsetup = DSC_END(dsc);
+	dsc->scan_section = scan_pre_pages;
+	if (dsc_check_match(dsc))
+	    return CDSC_NOTDSC;
+	return CDSC_OK;
+    }
+    else if (IS_DSC(line, "%%BeginFeature:")) {
+	dsc->id = CDSC_BEGINFEATURE;
+	/* ignore Begin/EndFeature, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_feature_count++;
+    }
+    else if (IS_DSC(line, "%%EndFeature")) {
+	dsc->id = CDSC_ENDFEATURE;
+	dsc->begin_feature_count--;
+    }
+    else if (IS_DSC(line, "%%Feature:")) {
+	dsc->id = CDSC_FEATURE;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%BeginResource:")) {
+	dsc->id = CDSC_BEGINRESOURCE;
+	/* ignore Begin/EndResource, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_resource_count++;
+    }
+    else if (IS_DSC(line, "%%EndResource")) {
+	dsc->id = CDSC_ENDRESOURCE;
+	dsc->begin_resource_count--;
+    }
+    else if (IS_DSC(line, "%%PaperColor:")) {
+	dsc->id = CDSC_PAPERCOLOR;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%PaperForm:")) {
+	dsc->id = CDSC_PAPERFORM;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%PaperWeight:")) {
+	dsc->id = CDSC_PAPERWEIGHT;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%PaperSize:")) {
+	/* DSC 2.1 */
+        GSBOOL found_media = FALSE;
+	int i;
+	int n = 12;
+	char buf[MAXSTR];
+	buf[0] = '\0';
+	dsc->id = CDSC_PAPERSIZE;
+	dsc_copy_string(buf, sizeof(buf)-1, dsc->line+n, dsc->line_length-n, 
+		NULL);
+ 	for (i=0; i<(int)dsc->media_count; i++) {
+	    if (dsc->media[i] && dsc->media[i]->name && 
+		(dsc_stricmp(buf, dsc->media[i]->name)==0)) {
+		dsc->page_media = dsc->media[i];
+		found_media = TRUE;
+		break;
+	    }
+	}
+	if (!found_media) {
+	    /* It didn't match %%DocumentPaperSizes: */
+	    /* Try our known media */
+	    const CDSCMEDIA *m = dsc_known_media;
+	    while (m->name) {
+		if (dsc_stricmp(buf, m->name)==0) {
+		    dsc->page_media = m;
+		    break;
+		}
+		m++;
+	    }
+	    if (m->name == NULL)
+		dsc_unknown(dsc);
+	}
+    }
+    else {
+	/* All other DSC comments are unknown, but not an error */
+	dsc->id = CDSC_UNKNOWNDSC;
+	dsc_unknown(dsc);
+    }
+
+    dsc->endsetup = DSC_END(dsc);
+    return CDSC_OK;
+}
+
+static int 
+dsc_scan_page(CDSC *dsc)
+{
+    /* Page section ends at */
+    /*  %%Page */
+    /*  %%Trailer */
+    /*  %%EOF */
+    char *line = dsc->line;
+    dsc->id = CDSC_OK;
+
+    if (dsc->scan_section == scan_pre_pages) {
+	if (IS_DSC(line, "%%Page:")) {
+	    dsc->scan_section = scan_pages;
+	    /* fall through */
+	}
+	else  {
+	    /* %%Page: didn't follow %%EndSetup
+	     * Keep reading until reach %%Page or %%Trailer
+	     * and add it to previous section.
+	     */
+	    DSC_OFFSET *last;
+	    if (dsc->endsetup != 0)
+		last = &dsc->endsetup;
+	    else if (dsc->endprolog != 0)
+		last = &dsc->endprolog;
+	    else if (dsc->enddefaults != 0)
+		last = &dsc->enddefaults;
+	    else if (dsc->endpreview != 0)
+		last = &dsc->endpreview;
+	    else if (dsc->endcomments != 0)
+		last = &dsc->endcomments;
+	    else
+		last = &dsc->begincomments;
+	    *last = DSC_START(dsc);
+	    if (IS_DSC(line, "%%Trailer") || IS_DSC(line, "%%EOF")) {
+		dsc->scan_section = scan_pre_trailer;
+		return CDSC_PROPAGATE;
+	    }
+	    *last = DSC_END(dsc);
+	    return CDSC_OK;
+	}
+    }
+
+    if (NOT_DSC_LINE(line)) {
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%Page:")) {
+	int code;
+	dsc->id = CDSC_PAGE;
+	if (dsc->page_count) {
+	    dsc->page[dsc->page_count-1].end = DSC_START(dsc);
+	    if (dsc_check_match(dsc))
+		return CDSC_NOTDSC;
+	}
+
+	if ( (code = dsc_parse_page(dsc)) != CDSC_OK)
+	    return code;
+        if (dsc->page_count == 0)
+	    dsc->scan_section = scan_pre_pages;
+    }
+    else if (IS_DSC(line, "%%BeginPreview")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (IS_DSC(line, "%%BeginDefaults")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (IS_DSC(line, "%%BeginProlog")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (IS_DSC(line, "%%BeginSetup")) {
+	/* ignore because we have already processed this section */
+    }
+    else if (dsc_is_section(line)) {
+	if (IS_DSC(line, "%%Trailer")) {
+	    if (dsc->page_count)
+		dsc->page[dsc->page_count-1].end = DSC_START(dsc);
+	    if (dsc->file_length) {
+		if ((!dsc->doseps_end && 
+			((DSC_END(dsc) + 32768) < dsc->file_length)) ||
+		     ((dsc->doseps_end) && 
+			((DSC_END(dsc) + 32768) < dsc->doseps_end))) {
+		    int rc = dsc_error(dsc, CDSC_MESSAGE_EARLY_TRAILER, 
+			dsc->line, dsc->line_length);
+		    switch (rc) {
+			case CDSC_RESPONSE_OK:
+			    /* ignore early trailer */
+			    break;
+			case CDSC_RESPONSE_CANCEL:
+			    /* this is the trailer */
+			    dsc->scan_section = scan_pre_trailer;
+			    if (dsc_check_match(dsc))
+				return CDSC_NOTDSC;
+			    return CDSC_PROPAGATE;
+			case CDSC_RESPONSE_IGNORE_ALL:
+			    return CDSC_NOTDSC;
+		    }
+		}
+		else {
+		    dsc->scan_section = scan_pre_trailer;
+		    if (dsc_check_match(dsc))
+			return CDSC_NOTDSC;
+		    return CDSC_PROPAGATE;
+		}
+	    }
+	    else {
+		dsc->scan_section = scan_pre_trailer;
+		if (dsc_check_match(dsc))
+		    return CDSC_NOTDSC;
+		return CDSC_PROPAGATE;
+	    }
+	}
+	else if (IS_DSC(line, "%%EOF")) {
+	    if (dsc->page_count)
+		dsc->page[dsc->page_count-1].end = DSC_START(dsc);
+	    if (dsc->file_length) {
+		if ((!dsc->doseps_end && 
+			((DSC_END(dsc) + 100) < dsc->file_length)) ||
+		     ((dsc->doseps_end) && 
+			((DSC_END(dsc) + 100) < dsc->doseps_end))) {
+		    int rc = dsc_error(dsc, CDSC_MESSAGE_EARLY_EOF, 
+			dsc->line, dsc->line_length);
+		    switch (rc) {
+			case CDSC_RESPONSE_OK:
+			    /* %%EOF is wrong, ignore it */
+			    break;
+			case CDSC_RESPONSE_CANCEL:
+			    /* %%EOF is correct */
+			    dsc->scan_section = scan_eof;
+			    dsc->eof = TRUE;
+			    if (dsc_check_match(dsc))
+				return CDSC_NOTDSC;
+			    return CDSC_PROPAGATE;
+			case CDSC_RESPONSE_IGNORE_ALL:
+			    return CDSC_NOTDSC;
+		    }
+		}
+	    }
+	    else {
+		/* ignore it */
+		if (dsc_check_match(dsc))
+		    return CDSC_NOTDSC;
+		return CDSC_OK;
+	    }
+	}
+	else {
+	    /* Section comment, probably from a badly */
+	    /* encapsulated EPS file. */
+	    int rc = dsc_error(dsc, CDSC_MESSAGE_BAD_SECTION, 
+		    dsc->line, dsc->line_length);
+	    if (rc == CDSC_RESPONSE_IGNORE_ALL)
+		return CDSC_NOTDSC;
+	}
+    }
+    else if (IS_DSC(line, "%%PageTrailer")) {
+	dsc->id = CDSC_PAGETRAILER;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%BeginPageSetup")) {
+	dsc->id = CDSC_BEGINPAGESETUP;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%EndPageSetup")) {
+	dsc->id = CDSC_ENDPAGESETUP;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%PageMedia:")) {
+	dsc->id = CDSC_PAGEMEDIA;
+	if (dsc->page_count)
+	    dsc_parse_media(dsc, &(dsc->page[dsc->page_count-1].media));
+    }
+    else if (IS_DSC(line, "%%PaperColor:")) {
+	dsc->id = CDSC_PAPERCOLOR;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%PaperForm:")) {
+	dsc->id = CDSC_PAPERFORM;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%PaperWeight:")) {
+	dsc->id = CDSC_PAPERWEIGHT;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%PaperSize:")) {
+	/* DSC 2.1 */
+        GSBOOL found_media = FALSE;
+	int i;
+	int n = 12;
+	char buf[MAXSTR];
+	buf[0] = '\0';
+	dsc_copy_string(buf, sizeof(buf)-1, dsc->line+n, 
+	    dsc->line_length-n, NULL);
+ 	for (i=0; i<(int)dsc->media_count; i++) {
+	    if (dsc->media[i] && dsc->media[i]->name && 
+		(dsc_stricmp(buf, dsc->media[i]->name)==0)) {
+		if (dsc->page_count)
+		    dsc->page[dsc->page_count-1].media = dsc->media[i];
+		found_media = TRUE;
+		break;
+	    }
+	}
+	if (!found_media) {
+	    /* It didn't match %%DocumentPaperSizes: */
+	    /* Try our known media */
+	    const CDSCMEDIA *m = dsc_known_media;
+	    while (m->name) {
+		if (dsc_stricmp(buf, m->name)==0) {
+		    if (dsc->page_count)
+			dsc->page[dsc->page_count-1].media = m;
+		    break;
+		}
+		m++;
+	    }
+	    if (m->name == NULL)
+		dsc_unknown(dsc);
+	}
+    }
+    else if (IS_DSC(line, "%%PageOrientation:")) {
+	if (dsc->page_count) {
+	    dsc->id = CDSC_PAGEORIENTATION;
+	    if (dsc_parse_orientation(dsc, 
+		&(dsc->page[dsc->page_count-1].orientation) ,18))
+		return CDSC_NOTDSC;
+	}
+    }
+    else if (IS_DSC(line, "%%PageBoundingBox:")) {
+	if (dsc->page_count) {
+	    dsc->id = CDSC_PAGEBOUNDINGBOX;
+	    if (dsc_parse_bounding_box(dsc, 
+		&dsc->page[dsc->page_count-1].bbox, 18))
+		return CDSC_NOTDSC;
+	}
+    }
+    else if (IS_DSC(line, "%%ViewingOrientation:")) {
+	if (dsc->page_count) {
+	    dsc->id = CDSC_VIEWINGORIENTATION;
+	    if (dsc_parse_viewing_orientation(dsc, 
+		&dsc->page[dsc->page_count-1].viewing_orientation))
+		return CDSC_ERROR;
+	}
+    }
+    else if (IS_DSC(line, "%%PageCropBox:")) {
+	if (dsc->page_count) {
+	    dsc->id = CDSC_PAGECROPBOX;
+	    if (dsc_parse_float_bounding_box(dsc, 
+		&(dsc->page[dsc->page_count-1].crop_box), 14))
+		return CDSC_ERROR;
+	}
+    }
+    else if (IS_DSC(line, "%%BeginFont:")) {
+	dsc->id = CDSC_BEGINFONT;
+	/* ignore Begin/EndFont, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_font_count++;
+    }
+    else if (IS_DSC(line, "%%EndFont")) {
+	dsc->id = CDSC_BEGINFONT;
+	dsc->begin_font_count--;
+    }
+    else if (IS_DSC(line, "%%BeginFeature:")) {
+	dsc->id = CDSC_BEGINFEATURE;
+	/* ignore Begin/EndFeature, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_feature_count++;
+    }
+    else if (IS_DSC(line, "%%EndFeature")) {
+	dsc->id = CDSC_ENDFEATURE;
+	dsc->begin_feature_count--;
+    }
+    else if (IS_DSC(line, "%%BeginResource:")) {
+	dsc->id = CDSC_BEGINRESOURCE;
+	/* ignore Begin/EndResource, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_resource_count++;
+    }
+    else if (IS_DSC(line, "%%EndResource")) {
+	dsc->id = CDSC_ENDRESOURCE;
+	dsc->begin_resource_count--;
+    }
+    else if (IS_DSC(line, "%%BeginProcSet:")) {
+	dsc->id = CDSC_BEGINPROCSET;
+	/* ignore Begin/EndProcSet, apart form making sure */
+	/* that they are matched. */
+	dsc->begin_procset_count++;
+    }
+    else if (IS_DSC(line, "%%EndProcSet")) {
+	dsc->id = CDSC_ENDPROCSET;
+	dsc->begin_procset_count--;
+    }
+    else if (IS_DSC(line, "%%IncludeFont:")) {
+	dsc->id = CDSC_INCLUDEFONT;
+	/* ignore */
+    }
+    else {
+	/* All other DSC comments are unknown, but not an error */
+	dsc->id = CDSC_UNKNOWNDSC;
+	dsc_unknown(dsc);
+    }
+
+    if (dsc->page_count)
+	dsc->page[dsc->page_count-1].end = DSC_END(dsc);
+    return CDSC_OK;
+}
+
+/* Valid Trailer comments are
+ * %%Trailer
+ * %%EOF
+ * or the following deferred with (atend)
+ * %%BoundingBox:
+ * %%DocumentCustomColors:
+ * %%DocumentFiles:
+ * %%DocumentFonts:
+ * %%DocumentNeededFiles:
+ * %%DocumentNeededFonts:
+ * %%DocumentNeededProcSets:
+ * %%DocumentNeededResources:
+ * %%DocumentProcSets:
+ * %%DocumentProcessColors:
+ * %%DocumentSuppliedFiles:
+ * %%DocumentSuppliedFonts:
+ * %%DocumentSuppliedProcSets: 
+ * %%DocumentSuppliedResources: 
+ * %%Orientation: 
+ * %%Pages: 
+ * %%PageOrder: 
+ *
+ * Our supported subset is
+ * %%Trailer
+ * %%EOF
+ * %%BoundingBox:
+ * %%CropBox:
+ * %%HiResBoundingBox:
+ * %%DocumentCustomColors:
+ * %%DocumentProcessColors:
+ * %%Orientation: 
+ * %%Pages: 
+ * %%PageOrder: 
+ * In addition to these, we support
+ * %%DocumentMedia:
+ * 
+ * A %%PageTrailer can have the following:
+ * %%PageBoundingBox: 
+ * %%PageCustomColors: 
+ * %%PageFiles: 
+ * %%PageFonts: 
+ * %%PageOrientation: 
+ * %%PageProcessColors: 
+ * %%PageResources: 
+ */
+
+static int
+dsc_scan_trailer(CDSC *dsc)
+{
+    /* Trailer section start at */
+    /*  %%Trailer */
+    /* and ends at */
+    /*  %%EOF */
+    char *line = dsc->line;
+    GSBOOL continued = FALSE;
+    dsc->id = CDSC_OK;
+
+    if (dsc->scan_section == scan_pre_trailer) {
+	if (IS_DSC(line, "%%Trailer")) {
+	    dsc->id = CDSC_TRAILER;
+	    dsc->begintrailer = DSC_START(dsc);
+	    dsc->endtrailer = DSC_END(dsc);
+	    dsc->scan_section = scan_trailer;
+	    return CDSC_OK;
+	}
+	else if (IS_DSC(line, "%%EOF")) {
+	    dsc->id = CDSC_EOF;
+	    dsc->begintrailer = DSC_START(dsc);
+	    dsc->endtrailer = DSC_END(dsc);
+	    dsc->scan_section = scan_trailer;
+	    /* Continue, in case we found %%EOF in an embedded document */
+	    return CDSC_OK;
+	}
+	else {
+	    /* %%Page: didn't follow %%EndSetup
+	     * Keep reading until reach %%Page or %%Trailer
+	     * and add it to setup section
+	     */
+	    /* append to previous section */
+	    if (dsc->beginsetup)
+		dsc->endsetup = DSC_END(dsc);
+	    else if (dsc->beginprolog)
+		dsc->endprolog = DSC_END(dsc);
+	    else {
+		/* horribly confused */
+	    }
+	    return CDSC_OK;
+	}
+    }
+
+    /* Handle continuation lines.
+     * See comment above about our restrictive processing of 
+     * continuation lines
+     */
+    if (IS_DSC(line, "%%+")) {
+	line = dsc->last_line;
+	continued = TRUE;
+    }
+    else
+	dsc_save_line(dsc);
+
+    if (NOT_DSC_LINE(line)) {
+	/* ignore */
+    }
+    else if (IS_DSC(dsc->line, "%%EOF")) {
+	/* Keep scanning, in case we have a false trailer */
+	dsc->id = CDSC_EOF;
+    }
+    else if (IS_DSC(dsc->line, "%%Trailer")) {
+	/* Cope with no pages with code after setup and before trailer. */
+	/* Last trailer is the correct one. */
+	dsc->id = CDSC_TRAILER;
+	dsc->begintrailer = DSC_START(dsc);
+    }
+    else if (IS_DSC(line, "%%Pages:")) {
+	dsc->id = CDSC_PAGES;
+	if (dsc_parse_pages(dsc) != 0)
+	       return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%BoundingBox:")) {
+	dsc->id = CDSC_BOUNDINGBOX;
+	if (dsc_parse_bounding_box(dsc, &(dsc->bbox), continued ? 3 : 14))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%HiResBoundingBox:")) {
+	dsc->id = CDSC_HIRESBOUNDINGBOX;
+	if (dsc_parse_float_bounding_box(dsc, &(dsc->hires_bbox), 
+	    continued ? 3 : 19))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%CropBox:")) {
+	dsc->id = CDSC_CROPBOX;
+	if (dsc_parse_float_bounding_box(dsc, &(dsc->crop_box), 
+	    continued ? 3 : 10))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%Orientation:")) {
+	dsc->id = CDSC_ORIENTATION;
+	if (dsc_parse_orientation(dsc, &(dsc->page_orientation), continued ? 3 : 14))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%PageOrder:")) {
+	dsc->id = CDSC_PAGEORDER;
+	if (dsc_parse_order(dsc))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(line, "%%DocumentMedia:")) {
+	dsc->id = CDSC_DOCUMENTMEDIA;
+	if (dsc_parse_document_media(dsc))
+	    return CDSC_ERROR;
+    }
+    else if (IS_DSC(dsc->line, "%%Page:")) {
+	/* This should not occur in the trailer, but we might see 
+	 * this if a document has been incorrectly embedded.
+	 */
+	int rc = dsc_error(dsc, CDSC_MESSAGE_PAGE_IN_TRAILER, 
+		dsc->line, dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+		/* Assume that we are really in the previous */
+		/* page, not the trailer */
+		dsc->scan_section = scan_pre_pages;
+		if (dsc->page_count)
+		    dsc->page[dsc->page_count-1].end = DSC_START(dsc);
+		return CDSC_PROPAGATE;	/* try again */
+	    case CDSC_RESPONSE_CANCEL:
+		/* ignore pages in trailer */
+		break;
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+    else if (IS_DSC(line, "%%DocumentNeededFonts:")) {
+	dsc->id = CDSC_DOCUMENTNEEDEDFONTS;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%DocumentSuppliedFonts:")) {
+	dsc->id = CDSC_DOCUMENTSUPPLIEDFONTS;
+	/* ignore */
+    }
+    else if (IS_DSC(line, "%%DocumentProcessColors:")) {
+	dsc->id = CDSC_DOCUMENTPROCESSCOLORS;
+	if (dsc_parse_process_colours(dsc) != CDSC_OK)
+	    dsc->id = CDSC_UNKNOWNDSC;
+    }
+    else if (IS_DSC(line, "%%DocumentCustomColors:")) {
+	dsc->id = CDSC_DOCUMENTCUSTOMCOLORS;
+	if (dsc_parse_custom_colours(dsc) != CDSC_OK)
+	    dsc->id = CDSC_UNKNOWNDSC;
+    }
+    else {
+	/* All other DSC comments are unknown, but not an error */
+	dsc->id = CDSC_UNKNOWNDSC;
+	dsc_unknown(dsc);
+    }
+
+    dsc->endtrailer = DSC_END(dsc);
+    return CDSC_OK;
+}
+
+
+static char *
+dsc_alloc_string(CDSC *dsc, const char *str, int len)
+{
+    char *p;
+    if (dsc->string_head == NULL) {
+	dsc->string_head = (CDSCSTRING *)dsc_memalloc(dsc, sizeof(CDSCSTRING));
+	if (dsc->string_head == NULL)
+	    return NULL;	/* no memory */
+	dsc->string = dsc->string_head;
+	dsc->string->next = NULL;
+	dsc->string->data = (char *)dsc_memalloc(dsc, CDSC_STRING_CHUNK);
+	if (dsc->string->data == NULL) {
+	    dsc_reset(dsc);
+	    return NULL;	/* no memory */
+	}
+	dsc->string->index = 0;
+	dsc->string->length = CDSC_STRING_CHUNK;
+    }
+    if ( dsc->string->index + len + 1 > dsc->string->length) {
+	/* allocate another string block */
+	CDSCSTRING *newstring = (CDSCSTRING *)dsc_memalloc(dsc, sizeof(CDSCSTRING));
+	if (newstring == NULL) {
+	    dsc_debug_print(dsc, "Out of memory\n");
+	    return NULL;
+	}
+        newstring->next = NULL;
+	newstring->length = 0;
+	newstring->index = 0;
+	newstring->data = (char *)dsc_memalloc(dsc, CDSC_STRING_CHUNK);
+	if (newstring->data == NULL) {
+	    dsc_memfree(dsc, newstring);
+	    dsc_debug_print(dsc, "Out of memory\n");
+	    return NULL;	/* no memory */
+	}
+	newstring->length = CDSC_STRING_CHUNK;
+	dsc->string->next = newstring;
+	dsc->string = newstring;
+    }
+    if ( dsc->string->index + len + 1 > dsc->string->length)
+	return NULL;	/* failed */
+    p = dsc->string->data + dsc->string->index;
+    memcpy(p, str, len);
+    *(p+len) = '\0';
+    dsc->string->index += len + 1;
+    return p;
+}
+
+/* store line, ignoring leading spaces */
+static char *
+dsc_add_line(CDSC *dsc, const char *line, unsigned int len)
+{
+    char *newline;
+    unsigned int i;
+    while (len && (IS_WHITE(*line))) {
+	len--;
+	line++;
+    }
+    newline = dsc_alloc_string(dsc, line, len);
+    if (newline == NULL)
+	return NULL;
+
+    for (i=0; i<len; i++) {
+	if (newline[i] == '\r') {
+	    newline[i]='\0';
+	    break;
+	}
+	if (newline[i] == '\n') {
+	    newline[i]='\0';
+	    break;
+	}
+    }
+    return newline;
+}
+
+
+/* Copy string on line to new allocated string str */
+/* String is always null terminated */
+/* String is no longer than len */
+/* Return pointer to string  */
+/* Store number of used characters from line */
+/* Don't copy enclosing () */
+static char *
+dsc_copy_string(char *str, unsigned int slen, char *line, 
+	unsigned int len, unsigned int *offset)
+{
+    int quoted = FALSE;
+    int instring=0;
+    unsigned int newlength = 0;
+    unsigned int i = 0;
+    unsigned char ch;
+    if (len > slen)
+	len = slen-1;
+    while ( (i<len) && IS_WHITE(line[i]))
+	i++;	/* skip leading spaces */
+    if ((i < len) && (line[i]=='(')) {
+	quoted = TRUE;
+	instring++;
+	i++; /* don't copy outside () */
+    }
+    while (i < len) {
+	str[newlength] = ch = line[i];
+	i++;
+	if (quoted) {
+	    if (ch == '(')
+		    instring++;
+	    if (ch == ')')
+		    instring--;
+	    if (instring==0)
+		    break;
+	}
+	else if (ch == ' ')
+	    break;
+
+	if (ch == '\r')
+	    break;
+	if (ch == '\n')
+	    break;
+	else if ( (ch == '\\') && (i+1 < len) ) {
+	    ch = line[i];
+	    if ((ch >= '0') && (ch <= '9')) {
+		/* octal coded character */
+		int j = 3;
+		ch = 0;
+		while (j && (i < len) && line[i]>='0' && line[i]<='7') {
+		    ch = (unsigned char)((ch<<3) + (line[i]-'0'));
+		    i++;
+		    j--;
+		}
+		str[newlength] = ch;
+	    }
+	    else if (ch == '(') {
+		str[newlength] = ch;
+		i++;
+	    }
+	    else if (ch == ')') {
+		str[newlength] = ch;
+		i++;
+	    }
+	    else if (ch == 'b') {
+		str[newlength] = '\b';
+		i++;
+	    }
+	    else if (ch == 'f') {
+		str[newlength] = '\b';
+		i++;
+	    }
+	    else if (ch == 'n') {
+		str[newlength] = '\n';
+		i++;
+	    }
+	    else if (ch == 'r') {
+		str[newlength] = '\r';
+		i++;
+	    }
+	    else if (ch == 't') {
+		str[newlength] = '\t';
+		i++;
+	    }
+	    else if (ch == '\\') {
+		str[newlength] = '\\';
+		i++;
+	    }
+	}
+	newlength++;
+    }
+    str[newlength] = '\0';
+    if (offset != (unsigned int *)NULL)
+        *offset = i;
+    return str;
+}
+
+static int 
+dsc_get_int(const char *line, unsigned int len, unsigned int *offset)
+{
+    char newline[MAXSTR];
+    int newlength = 0;
+    unsigned int i = 0;
+    unsigned char ch;
+
+    len = min(len, sizeof(newline)-1);
+    while ((i<len) && IS_WHITE(line[i]))
+	i++;	/* skip leading spaces */
+    while (i < len) {
+	newline[newlength] = ch = line[i];
+	if (!(isdigit(ch) || (ch=='-') || (ch=='+')))
+	    break;  /* not part of an integer number */
+	i++;
+	newlength++;
+    }
+    while ((i<len) && IS_WHITE(line[i]))
+	i++;	/* skip trailing spaces */
+    newline[newlength] = '\0';
+    if (offset != (unsigned int *)NULL)
+        *offset = i;
+    return atoi(newline);
+}
+
+static float 
+dsc_get_real(const char *line, unsigned int len, unsigned int *offset)
+{
+    char newline[MAXSTR];
+    int newlength = 0;
+    unsigned int i = 0;
+    unsigned char ch;
+
+    len = min(len, sizeof(newline)-1);
+    while ((i<len) && IS_WHITE(line[i]))
+	i++;	/* skip leading spaces */
+    while (i < len) {
+	newline[newlength] = ch = line[i];
+	if (!(isdigit(ch) || (ch=='.') || (ch=='-') || (ch=='+') 
+	    || (ch=='e') || (ch=='E')))
+	    break;  /* not part of a real number */
+	i++;
+	newlength++;
+    }
+    while ((i<len) && IS_WHITE(line[i]))
+	i++;	/* skip trailing spaces */
+
+    newline[newlength] = '\0';
+
+    if (offset != (unsigned int *)NULL)
+        *offset = i;
+    return (float)atof(newline);
+}
+
+int
+dsc_stricmp(const char *s, const char *t)
+{
+    while (toupper((unsigned char)*s) == toupper((unsigned char)*t)) {
+	if (*s == '\0')
+	    return 0;
+   	s++;
+	t++; 
+    }
+    return (toupper((unsigned char)*s) - toupper((unsigned char)*t));
+}
+
+
+static int
+dsc_parse_page(CDSC *dsc)
+{
+    char *p;
+    unsigned int i;
+    char page_label[MAXSTR];
+    char *pl;
+    int page_ordinal;
+    int page_number;
+
+    p = dsc->line + 7;
+    pl = dsc_copy_string(page_label, sizeof(page_label), p, dsc->line_length-7, &i);
+    if (pl == NULL)
+	return CDSC_ERROR;
+    p += i;
+    if (dsc->line_length - 7 - i == 0) {
+	/* Ordinal missing, or parentheses not matched in label */
+	/* Try to find ordinal at end of line */
+	while (i > 0) {
+	    if (!IS_WHITE_OR_EOL(p[-1])) 
+		break;
+	    p--;
+	    i--;
+	}
+	while (i > 0) {
+	    if (!isdigit((int)p[-1]))
+		break;
+	    p--;
+	    i--;
+	}
+    }
+    page_ordinal = dsc_get_int(p, dsc->line_length - 7 - i, NULL);
+
+    if ( (page_ordinal == 0) || (strlen(page_label) == 0) ||
+       (dsc->page_count && 
+	    (page_ordinal != dsc->page[dsc->page_count-1].ordinal+1)) ) {
+	int rc = dsc_error(dsc, CDSC_MESSAGE_PAGE_ORDINAL, dsc->line, 
+		dsc->line_length);
+	switch (rc) {
+	    case CDSC_RESPONSE_OK:
+		/* ignore this page */
+		return CDSC_OK;
+	    case CDSC_RESPONSE_CANCEL:
+		/* accept the page */
+		break;
+	    case CDSC_RESPONSE_IGNORE_ALL:
+		return CDSC_NOTDSC;
+	}
+    }
+
+    page_number = dsc->page_count;
+    dsc_add_page(dsc, page_ordinal, page_label);
+    dsc->page[page_number].begin = DSC_START(dsc);
+    dsc->page[page_number].end = DSC_START(dsc);
+
+    if (dsc->page[page_number].label == NULL)
+	return CDSC_ERROR;	/* no memory */
+	
+    return CDSC_OK;
+}
+
+
+
+/* DSC error reporting */
+
+void 
+dsc_debug_print(CDSC *dsc, const char *str)
+{
+    if (dsc->debug_print_fn)
+	dsc->debug_print_fn(dsc->caller_data, str);
+}
+
+
+/* Display a message about a problem with the DSC comments.
+ * 
+ * explanation = an index to to a multiline explanation in dsc_message[]
+ * line = pointer to the offending DSC line (if any)
+ * return code = 
+ *   CDSC_RESPONSE_OK 	       DSC was wrong, make a guess about what 
+ *                             was really meant.
+ *   CDSC_RESPONSE_CANCEL      Assume DSC was correct, ignore if it 
+ *                             is misplaced.
+ *   CDSC_RESPONSE_IGNORE_ALL  Ignore all DSC.
+ */
+/* Silent operation.  Don't display errors. */
+static int 
+dsc_error(CDSC *dsc, unsigned int explanation, 
+	char *line, unsigned int line_len)
+{
+    /* if error function provided, use it */
+    if (dsc->dsc_error_fn)
+	return dsc->dsc_error_fn(dsc->caller_data, dsc, 
+	    explanation, line, line_len);
+
+    /* treat DSC as being correct */
+    return CDSC_RESPONSE_CANCEL;
+}
+
+
+/* Fixup if DCS 2.0 was used */
+static int
+dsc_dcs2_fixup(CDSC *dsc)
+{
+    char composite[] = "Composite";
+    /* If DCS 2.0 single file format found, expose the separations
+     * as multiple pages.  Treat the initial EPS file as a single
+     * page without comments, prolog or trailer.
+     */
+    if (dsc->dcs2) {
+	int code = CDSC_OK;
+	int page_number;
+	DSC_OFFSET *pbegin;
+	DSC_OFFSET *pend;
+        DSC_OFFSET end;
+	CDCS2 *pdcs = dsc->dcs2;
+	/* Now treat the initial EPS file as a single page without
+	 * headers or trailer, so page extraction will fetch the
+	 * the correct separation. */
+	if (dsc->page_count == 0)
+	    code = dsc_add_page(dsc, 1, composite);
+	else if (dsc->page_count == 1)
+	    dsc->page[0].label = 
+		dsc_alloc_string(dsc, composite, (int)strlen(composite)+1);
+	if (code != CDSC_OK)
+	    return code; 
+	page_number = dsc->page_count - 1;
+	pbegin = &dsc->page[page_number].begin;
+	pend = &dsc->page[page_number].end;
+	if (*pbegin == *pend) {
+	    /* no page, so force it to conform to the following sections */
+	    *pbegin = 999999999;
+	    *pend = 0;
+	}
+
+	if (dsc->begincomments != dsc->endcomments) {
+	    *pbegin = min(dsc->begincomments, *pbegin);
+	    dsc->begincomments = 0;
+	    *pend = max(dsc->endcomments, *pend);
+	    dsc->endcomments = 0;
+	}
+
+	if (dsc->beginpreview != dsc->endpreview) {
+	    *pbegin = min(dsc->beginpreview, *pbegin);
+	    dsc->beginpreview = 0;
+	    *pend = max(dsc->endpreview, *pend);
+	    dsc->endpreview = 0;
+	}
+
+	if (dsc->begindefaults != dsc->enddefaults) {
+	    *pbegin = min(dsc->begindefaults, *pbegin);
+	    dsc->begindefaults = 0;
+	    *pend = max(dsc->enddefaults, *pend);
+	    dsc->enddefaults = 0;
+	}
+
+	if (dsc->beginprolog != dsc->endprolog) {
+	    *pbegin = min(dsc->beginprolog, *pbegin);
+	    dsc->beginprolog = 0;
+	    *pend = max(dsc->endprolog, *pend);
+	    dsc->endprolog = 0;
+	}
+
+	if (dsc->beginsetup != dsc->endsetup) {
+	    *pbegin = min(dsc->beginsetup, *pbegin);
+	    dsc->beginsetup = 0;
+	    *pend = max(dsc->endsetup, *pend);
+	    dsc->endsetup = 0;
+	}
+	
+	if (dsc->begintrailer != dsc->endtrailer) {
+	    *pbegin = min(dsc->begintrailer, *pbegin);
+	    dsc->begintrailer = 0;
+	    *pend = max(dsc->endtrailer, *pend);
+	    dsc->endtrailer = 0;
+	}
+
+	if (*pbegin == 999999999)
+	    *pbegin = *pend;
+	end = 0;	/* end of composite is start of first separation */
+	
+	while (pdcs) {
+    	    page_number = dsc->page_count;
+	    if ((pdcs->begin) && (pdcs->colourname != NULL)) {
+		/* Single file DCS 2.0 */
+		code = dsc_add_page(dsc, page_number+1, pdcs->colourname);
+		if (code)
+		    return code;
+		dsc->page[page_number].begin = pdcs->begin;
+		dsc->page[page_number].end = pdcs->end;
+		if (end != 0)
+		    end = min(end, pdcs->begin);
+		else
+		    end = pdcs->begin;		/* first separation  */
+	    }
+	    else {
+		/* Multiple file DCS 2.0 */
+		if ((pdcs->location != NULL) && 
+		    (pdcs->filetype != NULL) &&
+		    (pdcs->colourname != NULL) &&
+		    (dsc_stricmp(pdcs->location, "Local") == 0) &&
+		    ((dsc_stricmp(pdcs->filetype, "EPS") == 0) ||
+		     (dsc_stricmp(pdcs->filetype, "EPSF") == 0))) {
+		    code = dsc_add_page(dsc, page_number+1, pdcs->colourname);
+		    if (code)
+			return code;
+		    dsc->page[page_number].begin = 0;
+		    dsc->page[page_number].end = 0;
+		}
+	    }
+	    pdcs = pdcs->next;
+	}
+	/* end of composite is start of first separation */
+	if (end != 0)
+	    *pend = end;
+	/* According to the DCS2 specification, the size of the composite 
+	 * section can be determined by the smallest #offset.
+	 * Some incorrect DCS2 files don't put the separations inside
+	 * the DOS EPS PostScript section, and have a TIFF separation
+	 * between the composite and the first separation.  This
+	 * contravenes the DCS2 specification.  If we see one of these 
+ 	 * files, bring the end of the composite back to the end of 
+	 * the DOS EPS PostScript section.
+	 */
+	if (dsc->doseps_end && (*pend > dsc->doseps_end))
+	    *pend = dsc->doseps_end;
+    }
+    return 0;
+}
+
+
+static int
+dsc_parse_platefile(CDSC *dsc)
+{
+    unsigned int i, n;
+    CDCS2 dcs2;
+    CDCS2 *pdcs2;
+    char colourname[MAXSTR];
+    char filetype[MAXSTR];
+    char location[MAXSTR];
+    char *filename = NULL;
+    int filename_length = 0;
+    GSBOOL blank_line;
+    GSBOOL single = FALSE;
+    if (IS_DSC(dsc->line, "%%PlateFile:"))
+	n = 12;
+    else if (IS_DSC(dsc->line, "%%+"))
+	n = 3;
+    else
+	return CDSC_ERROR;	/* error */
+
+    memset(&dcs2, 0, sizeof(dcs2));
+    memset(&colourname, 0, sizeof(colourname));
+    memset(&filetype, 0, sizeof(filetype));
+    memset(&location, 0, sizeof(location));
+    memset(&filename, 0, sizeof(filename));
+
+    /* check for blank remainder of line */
+    blank_line = TRUE;
+    for (i=n; i<dsc->line_length; i++) {
+	if (!IS_WHITE_OR_EOL(dsc->line[i])) {
+	    blank_line = FALSE;
+	    break;
+	}
+    }
+
+    if (!blank_line) {
+	dsc_copy_string(colourname, sizeof(colourname),
+		dsc->line+n, dsc->line_length-n, &i);
+	n+=i;
+	if (i)
+	    dsc_copy_string(filetype, sizeof(filetype),
+		dsc->line+n, dsc->line_length-n, &i);
+	n+=i;
+	while (IS_WHITE_OR_EOL(dsc->line[n]))
+	    n++;
+	if (dsc->line[n] == '#') {
+	    /* single file DCS 2.0 */
+	    single = TRUE;
+	    n++;
+	    if (i)
+		dcs2.begin= dsc_get_int(dsc->line+n, dsc->line_length-n, &i);
+	    n+=i;
+	    if (i)
+		dcs2.end= dcs2.begin + 
+		    dsc_get_int(dsc->line+n, dsc->line_length-n, &i);
+	}
+	else {
+	    /* multiple file DCS 2.0 */
+	    if (i)
+		dsc_copy_string(location, sizeof(location),
+		    dsc->line+n, dsc->line_length-n, &i);
+	    n+=i;
+	    if (i) {
+		filename = dsc->line+n;
+		filename_length = dsc->line_length-n;
+	    }
+	}
+	if (i==0)
+	    dsc_unknown(dsc); /* we didn't get all fields */
+	else {
+	    /* Allocate strings */
+	    if (strlen(colourname))
+		dcs2.colourname = dsc_alloc_string(dsc, 
+		    colourname, (int)strlen(colourname));
+	    if (strlen(filetype))
+		dcs2.filetype = dsc_alloc_string(dsc, 
+		    filetype, (int)strlen(filetype));
+	    if (strlen(location))
+		dcs2.location = dsc_alloc_string(dsc, 
+		    location, (int)strlen(location));
+	    if (filename)
+		dcs2.filename = dsc_add_line(dsc, filename, filename_length);
+
+	    /* Prevent parser from reading separations */
+	    if (single)
+	        dsc->file_length = min(dsc->file_length, dcs2.begin);
+	    /* Allocate it */
+	    pdcs2 = (CDCS2 *)dsc_memalloc(dsc, sizeof(CDCS2));
+	    if (pdcs2 == NULL)
+		return CDSC_ERROR;	/* out of memory */
+	    memcpy(pdcs2, &dcs2, sizeof(CDCS2));
+	    /* Then add to list of separations */
+	    if (dsc->dcs2 == NULL)
+		dsc->dcs2 = pdcs2;
+	    else {
+		CDCS2 *this_dcs2 = dsc->dcs2;
+		while (this_dcs2->next)
+		    this_dcs2 = this_dcs2->next;
+		this_dcs2->next = pdcs2;
+	    }
+	}
+    }
+    return CDSC_OK;
+}
+
+/* Parse a DCS 1.0 plate comment, storing like a multi file DSC 2.0 */
+static int
+dsc_parse_dcs1plate(CDSC *dsc)
+{
+    unsigned int i, n = 0;
+    CDCS2 dcs2;
+    CDCS2 *pdcs2;
+    const char *colourname;
+    char filename[MAXSTR];
+    GSBOOL blank_line;
+    GSBOOL continued = FALSE;
+    char *line = dsc->line;
+
+    memset(&dcs2, 0, sizeof(dcs2));
+    memset(&filename, 0, sizeof(filename));
+
+    if (IS_DSC(line, "%%+")) {
+	n = 3;
+	line = dsc->last_line;
+	continued = TRUE;
+    }
+
+    if (IS_DSC(line, "%%CyanPlate:")) {
+	colourname = "Cyan";
+	if (!continued)
+	    n = 12;
+    }
+    else if (IS_DSC(line, "%%MagentaPlate:")) {
+	colourname = "Magenta";
+	if (!continued)
+	    n = 15;
+    }
+    else if (IS_DSC(line, "%%YellowPlate:")) {
+	colourname = "Yellow";
+	if (!continued)
+	    n = 14;
+    }
+    else if (IS_DSC(line, "%%BlackPlate:")) {
+	colourname = "Black";
+	if (!continued)
+	    n = 13;
+    }
+    else
+	return CDSC_ERROR;	/* error */
+
+    /* check for blank remainder of line */
+    blank_line = TRUE;
+    for (i=n; i<dsc->line_length; i++) {
+	if (!IS_WHITE_OR_EOL(dsc->line[i])) {
+	    blank_line = FALSE;
+	    break;
+	}
+    }
+
+    if (!blank_line) {
+	dsc_copy_string(filename, sizeof(filename),
+		    dsc->line+n, dsc->line_length-n, &i);
+	if (i==0)
+	    dsc_unknown(dsc); /* we didn't get all fields */
+	else {
+	    /* Allocate strings */
+	    dcs2.colourname = dsc_alloc_string(dsc, 
+		    colourname, (int)strlen(colourname));
+	    dcs2.filetype = dsc_alloc_string(dsc, "EPS", 3);
+	    dcs2.location = dsc_alloc_string(dsc, "Local", 5);
+	    if (strlen(filename))
+		dcs2.filename = dsc_alloc_string(dsc, 
+		    filename, (int)strlen(filename));
+	    /* Allocate it */
+	    pdcs2 = (CDCS2 *)dsc_memalloc(dsc, sizeof(CDCS2));
+	    if (pdcs2 == NULL)
+		return CDSC_ERROR;	/* out of memory */
+	    memcpy(pdcs2, &dcs2, sizeof(CDCS2));
+	    /* Then add to list of separations */
+	    if (dsc->dcs2 == NULL)
+		dsc->dcs2 = pdcs2;
+	    else {
+		CDCS2 *this_dcs2 = dsc->dcs2;
+		while (this_dcs2->next)
+		    this_dcs2 = this_dcs2->next;
+		this_dcs2->next = pdcs2;
+	    }
+	}
+    }
+    return CDSC_OK;
+}
+
+
+/* Find the filename which corresponds to this separation.
+ * Used with multiple file DCS 2.0.
+ * Returns NULL if there is no filename, or not DCS 2.0,
+ * or single file DCS 2.0.
+ * Caller will need to obtain the filesize from the file.
+ */
+const char *
+dsc_find_platefile(CDSC *dsc, int page)
+{
+    CDCS2 *pdcs = dsc->dcs2;
+    int i = 1;
+    while (pdcs) {
+	if (pdcs->begin != pdcs->end)
+	    return NULL;	/* Single file DCS 2.0 */
+	if (pdcs->location && pdcs->filetype && pdcs->colourname
+	    && (dsc_stricmp(pdcs->location, "Local") == 0)
+	    && ((dsc_stricmp(pdcs->filetype, "EPS") == 0) ||
+	        (dsc_stricmp(pdcs->filetype, "EPSF") == 0))) {
+	    if (i == page)
+		return pdcs->filename;
+	    i++;
+	}
+	pdcs = pdcs->next;
+    }
+    return NULL;
+}
+
+
+static CDSCCOLOUR *
+dsc_find_colour(CDSC *dsc, const char *colourname)
+{
+    CDSCCOLOUR *colour = dsc->colours;
+    while (colour) {
+	if (colour->name && (dsc_stricmp(colour->name, colourname)==0))
+	    return colour;
+	colour = colour->next;
+    }
+    return 0;
+}
+
+static int
+dsc_parse_process_colours(CDSC *dsc)
+{
+    unsigned int i, n;
+    CDSCCOLOUR *pcolour;
+    char colourname[MAXSTR];
+    GSBOOL blank_line;
+    if (IS_DSC(dsc->line, "%%DocumentProcessColors:"))
+	n = 24;
+    else if (IS_DSC(dsc->line, "%%+"))
+	n = 3;
+    else
+	return CDSC_ERROR;	/* error */
+
+    memset(&colourname, 0, sizeof(colourname));
+
+    /* check for blank remainder of line */
+    blank_line = TRUE;
+    for (i=n; i<dsc->line_length; i++) {
+	if (!IS_WHITE_OR_EOL(dsc->line[i])) {
+	    blank_line = FALSE;
+	    break;
+	}
+    }
+    while (IS_WHITE(dsc->line[n]))
+	n++;
+    if (COMPARE(dsc->line+n, "(atend)")) {
+	if (dsc->scan_section == scan_comments)
+	    blank_line = TRUE;
+	else {
+	    dsc_unknown(dsc);
+	    return CDSC_NOTDSC;
+	}
+    }
+
+    if (!blank_line) {
+	do {
+	    dsc_copy_string(colourname, sizeof(colourname),
+		dsc->line+n, dsc->line_length-n, &i);
+	    n+=i;
+	    if (i && strlen(colourname)) {
+		if ((pcolour = dsc_find_colour(dsc, colourname)) == NULL) {
+		    pcolour = (CDSCCOLOUR *)
+			dsc_memalloc(dsc, sizeof(CDSCCOLOUR));
+		    if (pcolour == NULL)
+			return CDSC_ERROR;	/* out of memory */
+		    memset(pcolour, 0, sizeof(CDSCCOLOUR));
+		    pcolour->custom = CDSC_CUSTOM_COLOUR_UNKNOWN;
+		    pcolour->name = dsc_alloc_string(dsc, 
+			colourname, (int)strlen(colourname));
+		    if (dsc->colours == NULL)
+			dsc->colours = pcolour;
+		    else {
+			CDSCCOLOUR *this_colour = dsc->colours;
+			while (this_colour->next)
+			    this_colour = this_colour->next;
+			this_colour->next = pcolour;
+		    }
+		}
+	        pcolour->type = CDSC_COLOUR_PROCESS;
+		if (dsc_stricmp(colourname, "Cyan")==0) {
+		    pcolour->custom = CDSC_CUSTOM_COLOUR_CMYK;
+		    pcolour->cyan = 1.0;
+		    pcolour->magenta = pcolour->yellow = pcolour->black = 0.0;
+		}
+		else if (dsc_stricmp(colourname, "Magenta")==0) {
+		    pcolour->custom = CDSC_CUSTOM_COLOUR_CMYK;
+		    pcolour->magenta = 1.0;
+		    pcolour->cyan = pcolour->yellow = pcolour->black = 0.0;
+		}
+		else if (dsc_stricmp(colourname, "Yellow")==0) {
+		    pcolour->custom = CDSC_CUSTOM_COLOUR_CMYK;
+		    pcolour->yellow = 1.0;
+		    pcolour->cyan = pcolour->magenta = pcolour->black = 0.0;
+		}
+		else if (dsc_stricmp(colourname, "Black")==0) {
+		    pcolour->custom = CDSC_CUSTOM_COLOUR_CMYK;
+		    pcolour->black = 1.0;
+		    pcolour->cyan = pcolour->magenta = pcolour->yellow = 0.0;
+		}
+		else if (dsc_stricmp(colourname, "Red")==0) {
+		    pcolour->custom = CDSC_CUSTOM_COLOUR_RGB;
+		    pcolour->red = 1.0;
+		    pcolour->green = pcolour->blue = 0.0;
+		}
+		else if (dsc_stricmp(colourname, "Green")==0) {
+		    pcolour->custom = CDSC_CUSTOM_COLOUR_RGB;
+		    pcolour->green = 1.0;
+		    pcolour->red = pcolour->blue = 0.0;
+		}
+		else if (dsc_stricmp(colourname, "Blue")==0) {
+		    pcolour->custom = CDSC_CUSTOM_COLOUR_RGB;
+		    pcolour->blue = 1.0;
+		    pcolour->red = pcolour->green = 0.0;
+		}
+	    }
+	} while (i != 0);
+    }
+    return CDSC_OK;
+}
+
+static int
+dsc_parse_custom_colours(CDSC *dsc)
+{
+    unsigned int i, n;
+    CDSCCOLOUR *pcolour;
+    char colourname[MAXSTR];
+    GSBOOL blank_line;
+    if (IS_DSC(dsc->line, "%%DocumentCustomColors:"))
+	n = 23;
+    else if (IS_DSC(dsc->line, "%%+"))
+	n = 3;
+    else
+	return CDSC_ERROR;	/* error */
+
+    memset(&colourname, 0, sizeof(colourname));
+
+    /* check for blank remainder of line */
+    blank_line = TRUE;
+    for (i=n; i<dsc->line_length; i++) {
+	if (!IS_WHITE_OR_EOL(dsc->line[i])) {
+	    blank_line = FALSE;
+	    break;
+	}
+    }
+    while (IS_WHITE(dsc->line[n]))
+	n++;
+    if (COMPARE(dsc->line+n, "(atend)")) {
+	if (dsc->scan_section == scan_comments)
+	    blank_line = TRUE;
+	else {
+	    dsc_unknown(dsc);
+	    return CDSC_NOTDSC;
+	}
+    }
+
+    if (!blank_line) {
+	do {
+	    dsc_copy_string(colourname, sizeof(colourname),
+		dsc->line+n, dsc->line_length-n, &i);
+	    n+=i;
+	    if (i && strlen(colourname)) {
+		if ((pcolour = dsc_find_colour(dsc, colourname)) == NULL) {
+		    pcolour = (CDSCCOLOUR *)
+			dsc_memalloc(dsc, sizeof(CDSCCOLOUR));
+		    if (pcolour == NULL)
+			return CDSC_ERROR;	/* out of memory */
+		    memset(pcolour, 0, sizeof(CDSCCOLOUR));
+		    pcolour->name = dsc_alloc_string(dsc, 
+			colourname, (int)strlen(colourname));
+		    pcolour->custom = CDSC_CUSTOM_COLOUR_UNKNOWN;
+		    if (dsc->colours == NULL)
+			dsc->colours = pcolour;
+		    else {
+			CDSCCOLOUR *this_colour = dsc->colours;
+			while (this_colour->next)
+			    this_colour = this_colour->next;
+			this_colour->next = pcolour;
+		    }
+		}
+                pcolour->type = CDSC_COLOUR_CUSTOM;
+	    }
+	} while (i != 0);
+    }
+    return CDSC_OK;
+}
+
+
+static int
+dsc_parse_cmyk_custom_colour(CDSC *dsc)
+{
+    unsigned int i, n;
+    CDSCCOLOUR *pcolour;
+    char colourname[MAXSTR];
+    float cyan, magenta, yellow, black;
+    GSBOOL blank_line;
+    if (IS_DSC(dsc->line, "%%CMYKCustomColor:"))
+	n = 18;
+    else if (IS_DSC(dsc->line, "%%+"))
+	n = 3;
+    else
+	return CDSC_ERROR;	/* error */
+
+    memset(&colourname, 0, sizeof(colourname));
+
+    /* check for blank remainder of line */
+
+    do {
+	blank_line = TRUE;
+	for (i=n; i<dsc->line_length; i++) {
+	    if (!IS_WHITE_OR_EOL(dsc->line[i])) {
+		blank_line = FALSE;
+		break;
+	    }
+	}
+	if (blank_line)
+	    break;
+	else {
+	    cyan = magenta = yellow = black = 0.0;
+	    cyan = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	    n += i;
+	    if (i)
+		magenta = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	    n += i;
+	    if (i)
+		yellow = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	    n += i;
+	    if (i)
+		black = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	    n += i;
+	    if (i)
+		dsc_copy_string(colourname, sizeof(colourname),
+		    dsc->line+n, dsc->line_length-n, &i);
+	    n+=i;
+	    if (i && strlen(colourname)) {
+		if ((pcolour = dsc_find_colour(dsc, colourname)) == NULL) {
+		    pcolour = (CDSCCOLOUR *)
+			dsc_memalloc(dsc, sizeof(CDSCCOLOUR));
+		    if (pcolour == NULL)
+			return CDSC_ERROR;	/* out of memory */
+		    memset(pcolour, 0, sizeof(CDSCCOLOUR));
+		    pcolour->name = dsc_alloc_string(dsc, 
+			colourname, (int)strlen(colourname));
+	            pcolour->type = CDSC_COLOUR_UNKNOWN;
+		    if (dsc->colours == NULL)
+			dsc->colours = pcolour;
+		    else {
+			CDSCCOLOUR *this_colour = dsc->colours;
+			while (this_colour->next)
+			    this_colour = this_colour->next;
+			this_colour->next = pcolour;
+		    }
+		}
+		pcolour->custom = CDSC_CUSTOM_COLOUR_CMYK;
+		pcolour->cyan = cyan;
+		pcolour->magenta = magenta;
+		pcolour->yellow = yellow;
+		pcolour->black = black;
+	    }
+	}
+    } while (i != 0);
+    return CDSC_OK;
+}
+
+static int
+dsc_parse_rgb_custom_colour(CDSC *dsc)
+{
+    unsigned int i, n;
+    CDSCCOLOUR *pcolour;
+    char colourname[MAXSTR];
+    float red, green, blue;
+    GSBOOL blank_line;
+    if (IS_DSC(dsc->line, "%%RGBCustomColor:"))
+	n = 17;
+    else if (IS_DSC(dsc->line, "%%+"))
+	n = 3;
+    else
+	return CDSC_ERROR;	/* error */
+
+    memset(&colourname, 0, sizeof(colourname));
+
+    /* check for blank remainder of line */
+
+    do {
+	blank_line = TRUE;
+	for (i=n; i<dsc->line_length; i++) {
+	    if (!IS_WHITE_OR_EOL(dsc->line[i])) {
+		blank_line = FALSE;
+		break;
+	    }
+	}
+	if (blank_line)
+	    break;
+	else {
+	    red = green = blue = 0.0;
+	    red = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	    n += i;
+	    if (i)
+		green = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	    n += i;
+	    if (i)
+		blue = dsc_get_real(dsc->line+n, dsc->line_length-n, &i);
+	    n += i;
+	    if (i)
+		dsc_copy_string(colourname, sizeof(colourname),
+		    dsc->line+n, dsc->line_length-n, &i);
+	    n+=i;
+	    if (i && strlen(colourname)) {
+		if ((pcolour = dsc_find_colour(dsc, colourname)) == NULL) {
+		    pcolour = (CDSCCOLOUR *)
+			dsc_memalloc(dsc, sizeof(CDSCCOLOUR));
+		    if (pcolour == NULL)
+			return CDSC_ERROR;	/* out of memory */
+		    memset(pcolour, 0, sizeof(CDSCCOLOUR));
+		    pcolour->name = dsc_alloc_string(dsc, 
+			colourname, (int)strlen(colourname));
+	            pcolour->type = CDSC_COLOUR_UNKNOWN;
+		    if (dsc->colours == NULL)
+			dsc->colours = pcolour;
+		    else {
+			CDSCCOLOUR *this_colour = dsc->colours;
+			while (this_colour->next)
+			    this_colour = this_colour->next;
+			this_colour->next = pcolour;
+		    }
+		}
+		pcolour->custom = CDSC_CUSTOM_COLOUR_RGB;
+		pcolour->red = red;
+		pcolour->green = green;
+		pcolour->blue = blue;
+	    }
+	}
+    } while (i != 0);
+    return CDSC_OK;
+}