X-Git-Url: https://git.draconx.ca/gitweb/cdecl99.git/blobdiff_plain/c034cd7dee803c5e4057ff8069103231ad431463..9abf0eb2e74d0fb3a4f652499571cb35697d3036:/src/scan.l
diff --git a/src/scan.l b/src/scan.l
index ad90afe..1688873 100644
--- a/src/scan.l
+++ b/src/scan.l
@@ -1,7 +1,7 @@
%top{
/*
* Scanner for C declarations.
- * Copyright © 2011 Nick Bowler
+ * Copyright © 2011, 2021, 2023 Nick Bowler
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -17,23 +17,44 @@
* along with this program. If not, see .
*/
+#include
#include "parse.h"
}
-%option noyywrap bison-locations reentrant never-interactive
+%option nodefault noyywrap bison-locations reentrant never-interactive
%option extra-type="_Bool"
%option prefix="cdecl__yy"
%{
-#define lex_error(msg) do { \
- cdecl__yyerror(yylloc, NULL, NULL, (msg)); \
+#include
+#include "cdecl-internal.h"
+#include "cdecl.h"
+
+#if HAVE_STRTOUMAX
+/* Best case, implementation provides strtoumax. */
+# define STRTOUMAX strtoumax
+#elif HAVE_STRTOULL
+/* Fall back to strtoull, with possibly reduced range. */
+#define STRTOUMAX strtoull
+#elif HAVE___STRTOULL
+/* HP-UX 11 has __strtoull in */
+#define STRTOUMAX __strtoull
+#else
+/* Fall back to strtoul, with possibly reduced range. */
+#define STRTOUMAX strtoul
+#endif
+
+#define lex_error(...) do { \
+ cdecl__err(CDECL_ENOPARSE, __VA_ARGS__); \
return T_LEX_ERROR; \
} while(0)
#define dup_token() do { \
yylval->strval = malloc(yyleng+1); \
- if (!yylval->strval) \
- lex_error("failed to allocate memory"); \
+ if (!yylval->strval) { \
+ cdecl__err(CDECL_ENOMEM); \
+ return T_LEX_ERROR; \
+ } \
strcpy(yylval->strval, yytext); \
} while(0)
%}
@@ -95,11 +116,11 @@ INTEGER 0x[[:xdigit:]]+|0[0-7]+|[[:digit:]]+
char *end;
errno = 0;
- yylval->uintval = strtoumax(yytext, &end, 0);
+ yylval->uintval = STRTOUMAX(yytext, &end, 0);
if (errno == ERANGE)
- lex_error("integer constant out of range");
+ lex_error(_("integer constant out of range"));
if (*end)
- lex_error("invalid integer constant");
+ lex_error(_("invalid integer constant"));
return T_UINT;
}
@@ -121,7 +142,28 @@ INTEGER 0x[[:xdigit:]]+|0[0-7]+|[[:digit:]]+
[[:space:]]+
. {
- char buf[] = "syntax error, unexpected #";
- *strchr(buf, '#') = *yytext;
- lex_error(buf);
+ char buf[5] = { yytext[0] };
+ unsigned char c = buf[0];
+
+ if (!isprint(c) || c == '\\' || c == '\'') {
+ /* Encode nonprinting characters with C-style escapes */
+ buf[0] = '\\';
+ switch (c) {
+ case '\a': buf[1] = 'a'; break;
+ case '\b': buf[1] = 'b'; break;
+ case '\f': buf[1] = 'f'; break;
+ case '\n': buf[1] = 'n'; break;
+ case '\r': buf[1] = 'r'; break;
+ case '\t': buf[1] = 't'; break;
+ case '\v': buf[1] = 'v'; break;
+ case '\\': buf[1] = '\\'; break;
+ case '\'': buf[1] = '\''; break;
+ default:
+ buf[1] = '0' + ((c >> 6) & 3);
+ buf[2] = '0' + ((c >> 3) & 7);
+ buf[3] = '0' + ((c >> 0) & 7);
+ }
+ }
+
+ lex_error(_("syntax error, unexpected '%s'"), buf);
}