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#include <my_global.h>
#include <m_string.h>
#include <m_ctype.h>
#include "my_regex.h"
#include "utils.h"
#include "regerror.ih"
/*
= #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_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"},
{0, "", "*** unknown regexp error code ***"},
};
/*
- regerror - the interface to error numbers
= extern size_t regerror(int, const regex_t *, char *, size_t);
*/
/* ARGSUSED */
size_t
my_regerror(int errcode, const my_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 = (char*) 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 my_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((char*) "0");
sprintf(localbuf, "%d", r->code);
return(localbuf);
}
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