X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1b6b675be301127f8df86270694c78217a735f8e..6ce43ac97db5cab1373d2e3c158849faffa8128d:/src/regex/regerror.c?ds=inline

diff --git a/src/regex/regerror.c b/src/regex/regerror.c
index 8be61f6041..9b2a31b274 100644
--- a/src/regex/regerror.c
+++ b/src/regex/regerror.c
@@ -1,130 +1,109 @@
-#ifdef __MWERKS__
-typedef long off_t ;
-#else
-#include <sys/types.h>
-#endif
-#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 (!)
+ * 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"
+
+/* unknown-error explanation */
+static char unk[] = "*** unknown regex error code 0x%x ***";
+
+/* struct to map among codes, code names, and explanations */
 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 ***" },
+	/* the actual table is built from regex.h */
+#	include "regerrs.h"
+	{ -1,	"",	"oops" },	/* explanation special-cased in 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;
+size_t				/* actual space needed (including NUL) */
+regerror(rxerrcode, preg, errbuf, errbuf_size)
+int rxerrcode;			/* 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 */
 {
-	register struct rerr *r;
-	register size_t len;
-	register int target = errcode &~ REG_ITOA;
-	register char *s;
-	char convbuf[50];
+	struct rerr *r;
+	char *msg;
+	char convbuf[sizeof(unk)+50];	/* 50 = plenty for int */
+	size_t len;
+	int icode;
 
-	if (errcode == REG_ATOI)
-		s = regatoi(preg, convbuf);
-	else {
+	switch (rxerrcode) {
+	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 */
 		for (r = rerrs; r->code >= 0; r++)
-			if (r->code == target)
+			if (r->code == rxerrcode)
 				break;
-	
-		if (errcode&REG_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;
+		if (r->code >= 0)
+			msg = r->explain;
+		else {			/* unknown; say so */
+			sprintf(convbuf, unk, rxerrcode);
+			msg = convbuf;
+		}
+		break;
 	}
 
-	len = strlen(s) + 1;
+	len = strlen(msg) + 1;		/* space needed, including NUL */
 	if (errbuf_size > 0) {
 		if (errbuf_size > len)
-			(void) strcpy(errbuf, s);
-		else {
-			(void) strncpy(errbuf, s, errbuf_size-1);
+			strcpy(errbuf, msg);
+		else {			/* truncate to fit */
+			strncpy(errbuf, msg, 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);
+	return len;
 }