-/*
- * regerror - error-code expansion
- *
- * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
- *
- * Development of this software was funded, in part, by Cray Research Inc.,
- * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
- * Corporation, none of whom are responsible for the results. The author
- * thanks all of them.
- *
- * Redistribution and use in source and binary forms -- with or without
- * modification -- are permitted for any purpose, provided that
- * redistributions in source form retain this entire copyright notice and
- * indicate the origin and nature of any modifications.
- *
- * I'd appreciate being given credit for this package in the documentation
- * of software which uses it, but that is not a requirement.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
- * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include "regguts.h"
+#include <sys/types.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <regex.h>
-/* unknown-error explanation */
-static char unk[] = "*** unknown regex error code 0x%x ***";
+#include "utils.h"
+#include "regerror.ih"
-/* struct to map among codes, code names, and explanations */
+/*
+ = #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[] = {
- /* the actual table is built from regex.h */
-# include "regerrs.h"
- { -1, "", "oops" }, /* explanation special-cased in code */
+ { 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 /* actual space needed (including NUL) */
+size_t
regerror(errcode, preg, errbuf, errbuf_size)
-int errcode; /* error code, or REG_ATOI or REG_ITOA */
-CONST regex_t *preg; /* associated regex_t (unused at present) */
-char *errbuf; /* result buffer (unless errbuf_size==0) */
-size_t errbuf_size; /* available space in errbuf, can be 0 */
+int errcode;
+const regex_t *preg;
+char *errbuf;
+size_t errbuf_size;
{
- struct rerr *r;
- char *msg;
- char convbuf[sizeof(unk)+50]; /* 50 = plenty for int */
- size_t len;
- int icode;
+ register struct rerr *r;
+ register size_t len;
+ register int target = errcode &~ REG_ITOA;
+ register char *s;
+ char convbuf[50];
- switch (errcode) {
- case REG_ATOI: /* convert name to number */
- for (r = rerrs; r->code >= 0; r++)
- if (strcmp(r->name, errbuf) == 0)
- break;
- sprintf(convbuf, "%d", r->code); /* -1 for unknown */
- msg = convbuf;
- break;
- case REG_ITOA: /* convert number to name */
- icode = atoi(errbuf); /* not our problem if this fails */
- for (r = rerrs; r->code >= 0; r++)
- if (r->code == icode)
- break;
- if (r->code >= 0)
- msg = r->name;
- else { /* unknown; tell him the number */
- sprintf(convbuf, "REG_%u", (unsigned)icode);
- msg = convbuf;
- }
- break;
- default: /* a real, normal error code */
+ if (errcode == REG_ATOI)
+ s = regatoi(preg, convbuf);
+ else {
for (r = rerrs; r->code >= 0; r++)
- if (r->code == errcode)
+ if (r->code == target)
break;
- if (r->code >= 0)
- msg = r->explain;
- else { /* unknown; say so */
- sprintf(convbuf, unk, errcode);
- msg = convbuf;
- }
- 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(msg) + 1; /* space needed, including NUL */
+ len = strlen(s) + 1;
if (errbuf_size > 0) {
if (errbuf_size > len)
- strcpy(errbuf, msg);
- else { /* truncate to fit */
- strncpy(errbuf, msg, errbuf_size-1);
+ (void) strcpy(errbuf, s);
+ else {
+ (void) strncpy(errbuf, s, errbuf_size-1);
errbuf[errbuf_size-1] = '\0';
}
}
- return len;
+ 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);
}
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