| #include <sys/types.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <limits.h> |
| #include <stdlib.h> |
| #include <regex.h> |
| |
| #include "utils.h" |
| #include "regerror.ih" |
| |
| /* |
| = #define REG_OKAY 0 |
| = #define REG_NOMATCH 1 |
| = #define REG_BADPAT 2 |
| = #define REG_ECOLLATE 3 |
| = #define REG_ECTYPE 4 |
| = #define REG_EESCAPE 5 |
| = #define REG_ESUBREG 6 |
| = #define REG_EBRACK 7 |
| = #define REG_EPAREN 8 |
| = #define REG_EBRACE 9 |
| = #define REG_BADBR 10 |
| = #define REG_ERANGE 11 |
| = #define REG_ESPACE 12 |
| = #define REG_BADRPT 13 |
| = #define REG_EMPTY 14 |
| = #define REG_ASSERT 15 |
| = #define REG_INVARG 16 |
| = #define REG_ATOI 255 // convert name to number (!) |
| = #define REG_ITOA 0400 // convert number to name (!) |
| */ |
| static struct rerr { |
| int code; |
| char *name; |
| char *explain; |
| } rerrs[] = { |
| REG_OKAY, "REG_OKAY", "no errors detected", |
| REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match", |
| REG_BADPAT, "REG_BADPAT", "invalid regular expression", |
| REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element", |
| REG_ECTYPE, "REG_ECTYPE", "invalid character class", |
| REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)", |
| REG_ESUBREG, "REG_ESUBREG", "invalid backreference number", |
| REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced", |
| REG_EPAREN, "REG_EPAREN", "parentheses not balanced", |
| REG_EBRACE, "REG_EBRACE", "braces not balanced", |
| REG_BADBR, "REG_BADBR", "invalid repetition count(s)", |
| REG_ERANGE, "REG_ERANGE", "invalid character range", |
| REG_ESPACE, "REG_ESPACE", "out of memory", |
| REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid", |
| REG_EMPTY, "REG_EMPTY", "empty (sub)expression", |
| REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug", |
| REG_INVARG, "REG_INVARG", "invalid argument to regex routine", |
| -1, "", "*** unknown regexp error code ***", |
| }; |
| |
| /* |
| - regerror - the interface to error numbers |
| = extern size_t regerror(int, const regex_t *, char *, size_t); |
| */ |
| /* ARGSUSED */ |
| size_t |
| regerror( |
| int errcode, |
| const regex_t *preg, |
| char *errbuf, |
| size_t errbuf_size) |
| { |
| register struct rerr *r; |
| register size_t len; |
| register int target = errcode &~ REG_ITOA; |
| register char *s; |
| char convbuf[50]; |
| |
| if (errcode == REG_ATOI) |
| s = regatoi(preg, convbuf); |
| else { |
| for (r = rerrs; r->code >= 0; r++) |
| if (r->code == target) |
| break; |
| |
| if (errcode®_ITOA) { |
| if (r->code >= 0) |
| (void) strcpy(convbuf, r->name); |
| else |
| sprintf(convbuf, "REG_0x%x", target); |
| assert(strlen(convbuf) < sizeof(convbuf)); |
| s = convbuf; |
| } else |
| s = r->explain; |
| } |
| |
| len = strlen(s) + 1; |
| if (errbuf_size > 0) { |
| if (errbuf_size > len) |
| (void) strcpy(errbuf, s); |
| else { |
| (void) strncpy(errbuf, s, errbuf_size-1); |
| errbuf[errbuf_size-1] = '\0'; |
| } |
| } |
| |
| return(len); |
| } |
| |
| /* |
| - regatoi - internal routine to implement REG_ATOI |
| == static char *regatoi(const regex_t *preg, char *localbuf); |
| */ |
| static char * |
| regatoi(preg, localbuf) |
| const regex_t *preg; |
| char *localbuf; |
| { |
| register struct rerr *r; |
| |
| for (r = rerrs; r->code >= 0; r++) |
| if (strcmp(r->name, preg->re_endp) == 0) |
| break; |
| if (r->code < 0) |
| return("0"); |
| |
| sprintf(localbuf, "%d", r->code); |
| return(localbuf); |
| } |