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_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 */ 33static struct rerr { 34 int code; 35 char *name; 36 char *explain; 37} rerrs[] = { 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 ***", 56}; 57 58/* 59 - regerror - the interface to error numbers 60 = extern size_t regerror(int, const regex_t *, char *, size_t); 61 */ 62/* ARGSUSED */ 63size_t 64regerror( 65int errcode, 66const regex_t *preg, 67char *errbuf, 68size_t errbuf_size) 69{ 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]; 75 76 if (errcode == REG_ATOI) 77 s = regatoi(preg, convbuf); 78 else { 79 for (r = rerrs; r->code >= 0; r++) 80 if (r->code == target) 81 break; 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; 92 } 93 94 len = strlen(s) + 1; 95 if (errbuf_size > 0) { 96 if (errbuf_size > len) 97 (void) strcpy(errbuf, s); 98 else { 99 (void) strncpy(errbuf, s, errbuf_size-1); 100 errbuf[errbuf_size-1] = '\0'; 101 } 102 } 103 104 return(len); 105} 106 107/* 108 - regatoi - internal routine to implement REG_ATOI 109 == static char *regatoi(const regex_t *preg, char *localbuf); 110 */ 111static char * 112regatoi(preg, localbuf) 113const regex_t *preg; 114char *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); 126} 127