Add scanner-utils.h for common scanner functions

We want to share the same functions for another scanner.

Signed-off-by: Ran Benita <ran234@gmail.com>

1 files changed, 1 insertions, 95 deletions

diff --git a/src/xkbcomp/rules.c b/src/xkbcomp/rules.c
index 3f71760..ec4a7aa 100644
--- a/src/xkbcomp/rules.c
+++ b/src/xkbcomp/rules.c
@@ -57,6 +57,7 @@
 #include "xkbcomp-priv.h"
 #include "rules.h"
 #include "include.h"
+#include "scanner-utils.h"
 
 /*
  * The rules file
@@ -138,25 +139,6 @@
 
 /* Scanner / Lexer */
 
-/* Point to some substring in the file; used to avoid copying. */
-struct sval {
-    const char *start;
-    unsigned int len;
-};
-typedef darray(struct sval) darray_sval;
-
-static inline bool
-svaleq(struct sval s1, struct sval s2)
-{
-    return s1.len == s2.len && strncmp(s1.start, s2.start, s1.len) == 0;
-}
-
-static inline bool
-svaleq_prefix(struct sval s1, struct sval s2)
-{
-    return s1.len <= s2.len && strncmp(s1.start, s2.start, s1.len) == 0;
-}
-
 /* Values returned with some tokens, like yylval. */
 union lvalue {
     struct sval string;
@@ -170,15 +152,6 @@ struct location {
     int line, column;
 };
 
-struct scanner {
-    const char *s;
-    size_t pos;
-    size_t len;
-    int line, column;
-    const char *file_name;
-    struct xkb_context *ctx;
-};
-
 enum rules_token {
     TOK_END_OF_FILE = 0,
     TOK_END_OF_LINE,
@@ -190,18 +163,6 @@ enum rules_token {
     TOK_ERROR
 };
 
-static void
-scanner_init(struct scanner *s, struct xkb_context *ctx,
-             const char *string, size_t len, const char *file_name)
-{
-    s->s = string;
-    s->len = len;
-    s->pos = 0;
-    s->line = s->column = 1;
-    s->file_name = file_name;
-    s->ctx = ctx;
-}
-
 /* C99 is stupid. Just use the 1 variant when there are no args. */
 #define scanner_error1(scanner, loc, msg) \
     log_warn(scanner->ctx, "rules/%s:%d:%d: " msg "\n", \
@@ -210,61 +171,6 @@ scanner_init(struct scanner *s, struct xkb_context *ctx,
     log_warn(scanner->ctx, "rules/%s:%d:%d: " fmt "\n", \
              scanner->file_name, loc->line, loc->column, __VA_ARGS__)
 
-static char
-peek(struct scanner *s)
-{
-    return s->pos < s->len ? s->s[s->pos] : '\0';
-}
-
-static bool
-eof(struct scanner *s)
-{
-    return peek(s) == '\0';
-}
-
-static bool
-eol(struct scanner *s)
-{
-    return peek(s) == '\n';
-}
-
-static char
-next(struct scanner *s)
-{
-    if (eof(s))
-        return '\0';
-    if (eol(s)) {
-        s->line++;
-        s->column = 1;
-    }
-    else {
-        s->column++;
-    }
-    return s->s[s->pos++];
-}
-
-static bool
-chr(struct scanner *s, char ch)
-{
-    if (peek(s) != ch)
-        return false;
-    s->pos++; s->column++;
-    return true;
-}
-
-static bool
-str(struct scanner *s, const char *string, size_t len)
-{
-    if (s->len - s->pos < len)
-        return false;
-    if (strncasecmp(s->s + s->pos, string, len) != 0)
-        return false;
-    s->pos += len; s->column += len;
-    return true;
-}
-
-#define lit(s, literal) str(s, literal, sizeof(literal) - 1)
-
 static enum rules_token
 lex(struct scanner *s, union lvalue *val, struct location *loc)
 {