X-Git-Url: https://git.draconx.ca/gitweb/cdecl99.git/blobdiff_plain/08ac16e49d67a40f0f8127cf43f8a166626615dc..ae2e55ea361bf632ba771264e07ec674123b0446:/src/scan.l

diff --git a/src/scan.l b/src/scan.l
index bb6564b..cc152b9 100644
--- a/src/scan.l
+++ b/src/scan.l
@@ -17,22 +17,30 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <config.h>
 #include "parse.h"
 }
 
-%option noyywrap bison-locations reentrant
+%option nodefault noyywrap bison-locations reentrant never-interactive
 %option extra-type="_Bool"
+%option prefix="cdecl__yy"
 
 %{
-#define lex_error(msg) do { \
-	yyerror(yylloc, NULL, NULL, (msg)); \
+#include <ctype.h>
+#include "cdecl-internal.h"
+#include "cdecl.h"
+
+#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)
 %}
@@ -96,9 +104,9 @@ INTEGER 0x[[:xdigit:]]+|0[0-7]+|[[:digit:]]+
 	errno = 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;
 }
@@ -120,7 +128,28 @@ 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);
 }