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| 1 | /* |
| 2 | * error.c - Error reporting |
| 3 | * |
| 4 | * Written 2009, 2010 by Werner Almesberger |
| 5 | * Copyright 2009, 2010 by Werner Almesberger |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | |
| 14 | #include <stdarg.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <stdio.h> |
| 17 | |
| 18 | #include "util.h" |
| 19 | #include "error.h" |
| 20 | |
| 21 | |
| 22 | extern char *yytext; |
| 23 | |
| 24 | int lineno = 1; |
| 25 | void (*reporter)(const char *s) = report_to_stderr; |
| 26 | |
| 27 | |
| 28 | void yywarn(const char *s) |
| 29 | { |
| 30 | /* we use yywarn only when starting */ |
| 31 | fprintf(stderr, "%d: warning: %s near \"%s\"\n", lineno, s, yytext); |
| 32 | } |
| 33 | |
| 34 | |
| 35 | void yyerrorf(const char *fmt, ...) |
| 36 | { |
| 37 | va_list ap; |
| 38 | char *buf; |
| 39 | int n; |
| 40 | |
| 41 | va_start(ap, fmt); |
| 42 | n = vsnprintf(NULL, 0, fmt, ap); |
| 43 | va_end(ap); |
| 44 | buf = alloc_size(n+1); |
| 45 | va_start(ap, fmt); |
| 46 | vsnprintf(buf, n+1, fmt, ap); |
| 47 | va_end(ap); |
| 48 | fail("%s", buf); |
| 49 | free(buf); |
| 50 | } |
| 51 | |
| 52 | |
| 53 | void yyerror(const char *s) |
| 54 | { |
| 55 | yyerrorf("%s", s); |
| 56 | } |
| 57 | |
| 58 | |
| 59 | void report_parse_error(const char *s) |
| 60 | { |
| 61 | fprintf(stderr, "%d: %s near \"%s\"\n", lineno, s, yytext); |
| 62 | exit(1); |
| 63 | } |
| 64 | |
| 65 | |
| 66 | void report_to_stderr(const char *s) |
| 67 | { |
| 68 | fprintf(stderr, "%s\n", s); |
| 69 | exit(1); |
| 70 | } |
| 71 | |
| 72 | |
| 73 | void fail(const char *fmt, ...) |
| 74 | { |
| 75 | va_list ap; |
| 76 | char *s; |
| 77 | |
| 78 | va_start(ap, fmt); |
| 79 | s = stralloc_vprintf(fmt, ap); |
| 80 | va_end(ap); |
| 81 | reporter(s); |
| 82 | free(s); |
| 83 | } |
| 84 |
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