Fix gcc -Wwrite-strings warnings that don't require public API changes

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

5 files changed, 23 insertions, 18 deletions

diff --git a/src/WrFFrI.c b/src/WrFFrI.c
index 83c11fa..b592fa1 100644
--- a/src/WrFFrI.c
+++ b/src/WrFFrI.c
@@ -51,7 +51,7 @@
 #endif
 
 /* MS Windows define a function called WriteFile @#%#&!!! */
-LFUNC(xpmWriteFile, int, (FILE *file, XpmImage *image, char *name,
+LFUNC(xpmWriteFile, int, (FILE *file, XpmImage *image, const char *name,
 			  XpmInfo *info));
 
 LFUNC(WriteColors, void, (FILE *file, XpmColor *colors, unsigned int ncolors));
@@ -104,7 +104,8 @@ XpmWriteFileFromXpmImage(
     XpmInfo	*info)
 {
     xpmData mdata;
-    char *name, *dot, *s, new_name[BUFSIZ] = {0};
+    const char *name;
+    char *dot, *s, new_name[BUFSIZ] = {0};
     int ErrorStatus;
 
     /* open file to write */
@@ -143,7 +144,7 @@ XpmWriteFileFromXpmImage(
 		name = new_name;
 	    }
 	    /* change '-' to '_' */
-	    s = name;
+	    s = new_name;
 	    while ((dot = strchr(s, '-'))) {
 		*dot = '_';
 		s = dot;
@@ -165,7 +166,7 @@ static int
 xpmWriteFile(
     FILE	*file,
     XpmImage	*image,
-    char	*name,
+    const char	*name,
     XpmInfo	*info)
 {
     /* calculation variables */
diff --git a/src/XpmI.h b/src/XpmI.h
index 9690622..280525d 100644
--- a/src/XpmI.h
+++ b/src/XpmI.h
@@ -114,7 +114,8 @@ typedef struct {
     unsigned int line;
     int CommentLength;
     char Comment[XPMMAXCMTLEN];
-    char *Bcmt, *Ecmt, Bos, Eos;
+    const char *Bcmt, *Ecmt;
+    char Bos, Eos;
     int format;			/* 1 if XPM1, 0 otherwise */
 #ifdef CXPMPROG
     int lineNum;
@@ -132,15 +133,15 @@ typedef struct {
 #define SPC ' '
 
 typedef struct {
-    char *type;			/* key word */
-    char *Bcmt;			/* string beginning comments */
-    char *Ecmt;			/* string ending comments */
+    const char *type;		/* key word */
+    const char *Bcmt;		/* string beginning comments */
+    const char *Ecmt;		/* string ending comments */
     char Bos;			/* character beginning strings */
     char Eos;			/* character ending strings */
-    char *Strs;			/* strings separator */
-    char *Dec;			/* data declaration string */
-    char *Boa;			/* string beginning assignment */
-    char *Eoa;			/* string ending assignment */
+    const char *Strs;		/* strings separator */
+    const char *Dec;		/* data declaration string */
+    const char *Boa;		/* string beginning assignment */
+    const char *Eoa;		/* string ending assignment */
 }      xpmDataType;
 
 extern xpmDataType xpmDataTypes[];
@@ -157,7 +158,7 @@ typedef struct {
 /* Maximum number of rgb mnemonics allowed in rgb text file. */
 #define MAX_RGBNAMES 1024
 
-extern char *xpmColorKeys[];
+extern const char *xpmColorKeys[];
 
 #define TRANSPARENT_COLOR "None"	/* this must be a string! */
 
diff --git a/src/data.c b/src/data.c
index 347aa46..898889c 100644
--- a/src/data.c
+++ b/src/data.c
@@ -61,7 +61,8 @@ ParseComment(xpmData *data)
 	register char c;
 	register unsigned int n = 0;
 	unsigned int notend;
-	char *s, *s2;
+	char *s;
+	const char *s2;
 
 	s = data->Comment;
 	*s = data->Bcmt[0];
@@ -119,7 +120,8 @@ ParseComment(xpmData *data)
 	register int c;
 	register unsigned int n = 0, a;
 	unsigned int notend;
-	char *s, *s2;
+	char *s;
+	const char *s2;
 
 	s = data->Comment;
 	*s = data->Bcmt[0];
diff --git a/src/parse.c b/src/parse.c
index 7dc2aa7..ff23a47 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -70,7 +70,7 @@ LFUNC(ParsePixels, int, (xpmData *data, unsigned int width,
 			 unsigned int cpp, XpmColor *colorTable,
 			 xpmHashTable *hashtable, unsigned int **pixels));
 
-char *xpmColorKeys[] = {
+const char *xpmColorKeys[] = {
     "s",				/* key #1: symbol */
     "m",				/* key #2: mono visual */
     "g4",				/* key #3: 4 grays visual */
@@ -205,7 +205,8 @@ xpmParseColors(
     unsigned int lastwaskey;		/* key read */
     char buf[BUFSIZ+1];
     char curbuf[BUFSIZ];		/* current buffer */
-    char **sptr, *s;
+    const char **sptr;
+    char *s;
     XpmColor *color;
     XpmColor *colorTable;
     char **defaults;
diff --git a/src/scan.c b/src/scan.c
index e51d1ab..54c8da5 100644
--- a/src/scan.c
+++ b/src/scan.c
@@ -53,7 +53,7 @@
 					 * minus \ and " for string compat
 					 * and ? to avoid ANSI trigraphs. */
 
-static char *printable =
+static const char *printable =
 " .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjklzxcvbnmMNBVCZ\
 ASDFGHJKLPIUYTREWQ!~^/()_`'][{}|";