libcdecl: reduce snprintf reliance for error reporting.

[cdecl99.git] / src / scan.l

diff --git a/src/scan.l b/src/scan.l
index 7e3e365af90f99102b3fc11adf198ed09e9f423d..7549e6f7baee99cafb40a46d72f2211f10d511ce 100644 (file)
--- a/src/scan.l
+++ b/src/scan.l
@@ -19,6 +19,9 @@
 
 #include <config.h>
 #include "parse.h"
+
+#define YY_NO_INPUT 1
+#define YY_NO_UNPUT 1
 }
 
 %option nodefault noyywrap bison-locations reentrant never-interactive
@@ -45,16 +48,6 @@
 #define STRTOUMAX strtoul
 #endif
 
-#define dup_token() do { \
-       yylval->strval = malloc(yyleng+1); \
-       if (!yylval->strval) { \
-               cdecl__errmsg(CDECL__ENOMEM); \
-               return T_LEX_ERROR; \
-       } \
-       memcpy(yylval->strval, yytext, yyleng); \
-       yylval->strval[yyleng] = 0; \
-} while(0)
-
 static char *to_octal(char *dst, unsigned val)
 {
        unsigned i;
@@ -124,37 +117,26 @@ INTEGER 0x[[:xdigit:]]+|0[0-7]+|[[:digit:]]+
 
 %{
        char *c;
-
-       if (yyextra > 0) {
-               yyextra = -yyextra;
-               return T_ENGLISH;
-       }
 %}
 
 "..."|[][;*(),] {
+       unsigned char *match;
        static const unsigned char tab[2][8] = {
                "*[](),.;",
                {
-                       T_ASTERISK  & 0xff,
-                       T_LBRACKET  & 0xff,
-                       T_RBRACKET  & 0xff,
-                       T_LPAREN    & 0xff,
-                       T_RPAREN    & 0xff,
-                       T_COMMA     & 0xff,
-                       T_ELLIPSIS  & 0xff,
-                       T_SEMICOLON & 0xff
+                       PACK_TOKEN(T_ASTERISK),
+                       PACK_TOKEN(T_LBRACKET),
+                       PACK_TOKEN(T_RBRACKET),
+                       PACK_TOKEN(T_LPAREN),
+                       PACK_TOKEN(T_RPAREN),
+                       PACK_TOKEN(T_COMMA),
+                       PACK_TOKEN(T_ELLIPSIS),
+                       PACK_TOKEN(T_SEMICOLON)
                }
        };
 
-       unsigned char *match;
-       int x;
-
        match = memchr(&tab, yytext[0], sizeof tab[0]);
-       x = match[sizeof tab[0]];
-
-       if (T_VOID >= 256)
-               x += 256;
-       return x;
+       return UNPACK_TOKEN(match[sizeof tab[0]]);
 }
 
 {INTEGER} {
@@ -175,8 +157,11 @@ INTEGER 0x[[:xdigit:]]+|0[0-7]+|[[:digit:]]+
 }
 
 {IDENT} {
-       int ret = cdecl__to_keyword(yytext, yyleng, yyextra);
-       if (ret == T_IDENT) {
+       unsigned x = cdecl__to_keyword(yytext, yyleng, yyextra);
+       int tok;
+
+       yylval->spectype = UNPACK_SPEC(x & 0xff);
+       if ((tok = (x >> 8)) == PACK_TOKEN(T_IDENT)) {
                /*
                 * Our IDENT pattern includes hyphens so we can match
                 * "variable-length" as a keyword.  In all other cases a
@@ -193,9 +178,11 @@ INTEGER 0x[[:xdigit:]]+|0[0-7]+|[[:digit:]]+
 #else
                yyless(strcspn(yytext, "-"));
 #endif
-               dup_token();
+               if (!(yylval->item = cdecl__alloc_item(yyleng+1)))
+                       return T_LEX_ERROR; \
+               memcpy(yylval->item->s, yytext, yyleng+1);
        }
-       return ret;
+       return UNPACK_TOKEN(tok);
 }
 
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