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1f0db2d9 VZ |
1 | #include <sys/types.h> |
2 | #include <stdio.h> | |
3 | #include <string.h> | |
4 | #include <ctype.h> | |
5 | #include <limits.h> | |
6 | #include <stdlib.h> | |
9b588fe1 | 7 | #include "regex.h" |
294645eb | 8 | |
1f0db2d9 VZ |
9 | #include "utils.h" |
10 | #include "regerror.ih" | |
294645eb | 11 | |
1f0db2d9 VZ |
12 | /* |
13 | = #define REG_OKAY 0 | |
14 | = #define REG_NOMATCH 1 | |
15 | = #define REG_BADPAT 2 | |
16 | = #define REG_ECOLLATE 3 | |
17 | = #define REG_ECTYPE 4 | |
18 | = #define REG_EESCAPE 5 | |
19 | = #define REG_ESUBREG 6 | |
20 | = #define REG_EBRACK 7 | |
21 | = #define REG_EPAREN 8 | |
22 | = #define REG_EBRACE 9 | |
23 | = #define REG_BADBR 10 | |
24 | = #define REG_ERANGE 11 | |
25 | = #define REG_ESPACE 12 | |
26 | = #define REG_BADRPT 13 | |
27 | = #define REG_EMPTY 14 | |
28 | = #define REG_ASSERT 15 | |
29 | = #define REG_INVARG 16 | |
30 | = #define REG_ATOI 255 // convert name to number (!) | |
31 | = #define REG_ITOA 0400 // convert number to name (!) | |
32 | */ | |
07dcc217 VZ |
33 | static struct rerr { |
34 | int code; | |
35 | char *name; | |
36 | char *explain; | |
37 | } rerrs[] = { | |
1f0db2d9 VZ |
38 | { REG_OKAY, "REG_OKAY", "no errors detected" }, |
39 | { REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match" }, | |
40 | { REG_BADPAT, "REG_BADPAT", "invalid regular expression" }, | |
41 | { REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" }, | |
42 | { REG_ECTYPE, "REG_ECTYPE", "invalid character class" }, | |
43 | { REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" }, | |
44 | { REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" }, | |
45 | { REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" }, | |
46 | { REG_EPAREN, "REG_EPAREN", "parentheses not balanced" }, | |
47 | { REG_EBRACE, "REG_EBRACE", "braces not balanced" }, | |
48 | { REG_BADBR, "REG_BADBR", "invalid repetition count(s)" }, | |
49 | { REG_ERANGE, "REG_ERANGE", "invalid character range" }, | |
50 | { REG_ESPACE, "REG_ESPACE", "out of memory" }, | |
51 | { REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" }, | |
52 | { REG_EMPTY, "REG_EMPTY", "empty (sub)expression" }, | |
53 | { REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" }, | |
54 | { REG_INVARG, "REG_INVARG", "invalid argument to regex routine" }, | |
55 | { -1, "", "*** unknown regexp error code ***" }, | |
07dcc217 VZ |
56 | }; |
57 | ||
58 | /* | |
59 | - regerror - the interface to error numbers | |
1f0db2d9 | 60 | = extern size_t regerror(int, const regex_t *, char *, size_t); |
07dcc217 VZ |
61 | */ |
62 | /* ARGSUSED */ | |
1f0db2d9 | 63 | size_t |
07dcc217 | 64 | regerror(errcode, preg, errbuf, errbuf_size) |
1f0db2d9 VZ |
65 | int errcode; |
66 | const regex_t *preg; | |
67 | char *errbuf; | |
68 | size_t errbuf_size; | |
07dcc217 | 69 | { |
1f0db2d9 VZ |
70 | register struct rerr *r; |
71 | register size_t len; | |
72 | register int target = errcode &~ REG_ITOA; | |
73 | register char *s; | |
74 | char convbuf[50]; | |
07dcc217 | 75 | |
1f0db2d9 VZ |
76 | if (errcode == REG_ATOI) |
77 | s = regatoi(preg, convbuf); | |
78 | else { | |
07dcc217 | 79 | for (r = rerrs; r->code >= 0; r++) |
1f0db2d9 | 80 | if (r->code == target) |
07dcc217 | 81 | break; |
1f0db2d9 VZ |
82 | |
83 | if (errcode®_ITOA) { | |
84 | if (r->code >= 0) | |
85 | (void) strcpy(convbuf, r->name); | |
86 | else | |
87 | sprintf(convbuf, "REG_0x%x", target); | |
88 | assert(strlen(convbuf) < sizeof(convbuf)); | |
89 | s = convbuf; | |
90 | } else | |
91 | s = r->explain; | |
07dcc217 VZ |
92 | } |
93 | ||
1f0db2d9 | 94 | len = strlen(s) + 1; |
07dcc217 VZ |
95 | if (errbuf_size > 0) { |
96 | if (errbuf_size > len) | |
1f0db2d9 VZ |
97 | (void) strcpy(errbuf, s); |
98 | else { | |
99 | (void) strncpy(errbuf, s, errbuf_size-1); | |
07dcc217 VZ |
100 | errbuf[errbuf_size-1] = '\0'; |
101 | } | |
102 | } | |
103 | ||
1f0db2d9 VZ |
104 | return(len); |
105 | } | |
106 | ||
107 | /* | |
108 | - regatoi - internal routine to implement REG_ATOI | |
109 | == static char *regatoi(const regex_t *preg, char *localbuf); | |
110 | */ | |
111 | static char * | |
112 | regatoi(preg, localbuf) | |
113 | const regex_t *preg; | |
114 | char *localbuf; | |
115 | { | |
116 | register struct rerr *r; | |
117 | ||
118 | for (r = rerrs; r->code >= 0; r++) | |
119 | if (strcmp(r->name, preg->re_endp) == 0) | |
120 | break; | |
121 | if (r->code < 0) | |
122 | return("0"); | |
123 | ||
124 | sprintf(localbuf, "%d", r->code); | |
125 | return(localbuf); | |
07dcc217 | 126 | } |