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> 7 #include <regex.h> 8 9 #include "utils.h" 10 #include "regerror.ih" 11 12 /* 13 = #define REG_NOMATCH 1 14 = #define REG_BADPAT 2 15 = #define REG_ECOLLATE 3 16 = #define REG_ECTYPE 4 17 = #define REG_EESCAPE 5 18 = #define REG_ESUBREG 6 19 = #define REG_EBRACK 7 20 = #define REG_EPAREN 8 21 = #define REG_EBRACE 9 22 = #define REG_BADBR 10 23 = #define REG_ERANGE 11 24 = #define REG_ESPACE 12 25 = #define REG_BADRPT 13 26 = #define REG_EMPTY 14 27 = #define REG_ASSERT 15 28 = #define REG_INVARG 16 29 = #define REG_ATOI 255 // convert name to number (!) 30 = #define REG_ITOA 0400 // convert number to name (!) 31 */ 32 static struct rerr { 33 int code; 34 char *name; 35 char *explain; 36 } rerrs[] = { 37 REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match", 38 REG_BADPAT, "REG_BADPAT", "invalid regular expression", 39 REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element", 40 REG_ECTYPE, "REG_ECTYPE", "invalid character class", 41 REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)", 42 REG_ESUBREG, "REG_ESUBREG", "invalid backreference number", 43 REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced", 44 REG_EPAREN, "REG_EPAREN", "parentheses not balanced", 45 REG_EBRACE, "REG_EBRACE", "braces not balanced", 46 REG_BADBR, "REG_BADBR", "invalid repetition count(s)", 47 REG_ERANGE, "REG_ERANGE", "invalid character range", 48 REG_ESPACE, "REG_ESPACE", "out of memory", 49 REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid", 50 REG_EMPTY, "REG_EMPTY", "empty (sub)expression", 51 REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug", 52 REG_INVARG, "REG_INVARG", "invalid argument to regex routine", 53 0, "", "*** unknown regexp error code ***", 54 }; 55 56 /* 57 - regerror - the interface to error numbers 58 = extern size_t regerror(int, const regex_t *, char *, size_t); 59 */ 60 /* ARGSUSED */ 61 size_t 62 regerror(errcode, preg, errbuf, errbuf_size) 63 int errcode; 64 const regex_t *preg; 65 char *errbuf; 66 size_t errbuf_size; 67 { 68 register struct rerr *r; 69 register size_t len; 70 register int target = errcode &~ REG_ITOA; 71 register char *s; 72 char convbuf[50]; 73 74 if (errcode == REG_ATOI) 75 s = regatoi(preg, convbuf); 76 else { 77 for (r = rerrs; r->code != 0; r++) 78 if (r->code == target) 79 break; 80 81 if (errcode®_ITOA) { 82 if (r->code != 0) 83 (void) strcpy(convbuf, r->name); 84 else 85 sprintf(convbuf, "REG_0x%x", target); 86 assert(strlen(convbuf) < sizeof(convbuf)); 87 s = convbuf; 88 } else 89 s = r->explain; 90 } 91 92 len = strlen(s) + 1; 93 if (errbuf_size > 0) { 94 if (errbuf_size > len) 95 (void) strcpy(errbuf, s); 96 else { 97 (void) strncpy(errbuf, s, errbuf_size-1); 98 errbuf[errbuf_size-1] = '\0'; 99 } 100 } 101 102 return(len); 103 } 104 105 /* 106 - regatoi - internal routine to implement REG_ATOI 107 == static char *regatoi(const regex_t *preg, char *localbuf); 108 */ 109 static char * 110 regatoi(preg, localbuf) 111 const regex_t *preg; 112 char *localbuf; 113 { 114 register struct rerr *r; 115 register size_t siz; 116 register char *p; 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); 126 } 127