--- /dev/null
+/*-
+ * Copyright (c) 1992, 1993, 1994 Henry Spencer.
+ * Copyright (c) 1992, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Henry Spencer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
+ *
+ * @(#)regerror.c 8.4 (Berkeley) 3/20/94
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/regex/regerror.c,v 1.11 2007/06/11 03:05:54 delphij Exp $");
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <regex.h>
+
+#include "utils.h"
+
+/* ========= begin header generated by ./mkh ========= */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* === regerror.c === */
+static char *regatoi(const regex_t *preg, char *localbuf);
+
+#ifdef __cplusplus
+}
+#endif
+/* ========= end header generated by ./mkh ========= */
+/*
+ = #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_ILLSEQ 17
+ = #define REG_ATOI 255 // convert name to number (!)
+ = #define REG_ITOA 0400 // convert number to name (!)
+ */
+static const 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"},
+ {REG_ILLSEQ, "REG_ILLSEQ", "illegal byte sequence"},
+ {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
+regerror(int errcode,
+ const regex_t * __restrict preg,
+ char * __restrict errbuf,
+ size_t errbuf_size)
+{
+ const struct rerr *r;
+ size_t len;
+ int target = errcode &~ REG_ITOA;
+ 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 char *
+regatoi(const regex_t *preg, char *localbuf)
+{
+ const 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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