128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
#include "winsup.h"
|
|
#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;
|
|
const char *name;
|
|
const 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(errcode, preg, errbuf, errbuf_size)
|
|
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 const 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 const 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);
|
|
}
|