LLVM  10.0.0svn
regerror.c
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1 /*-
2  * This code is derived from OpenBSD's libc/regex, original license follows:
3  *
4  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
5  * Copyright (c) 1992, 1993, 1994
6  * The Regents of the University of California. All rights reserved.
7  *
8  * This code is derived from software contributed to Berkeley by
9  * Henry Spencer.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  * notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in the
18  * documentation and/or other materials provided with the distribution.
19  * 3. Neither the name of the University nor the names of its contributors
20  * may be used to endorse or promote products derived from this software
21  * without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  *
35  * @(#)regerror.c 8.4 (Berkeley) 3/20/94
36  */
37 
38 #include <sys/types.h>
39 #include <stdio.h>
40 #include <string.h>
41 #include <ctype.h>
42 #include <limits.h>
43 #include <stdlib.h>
44 #include "regex_impl.h"
45 
46 #include "regutils.h"
47 
48 #ifdef _MSC_VER
49 #define snprintf _snprintf
50 #endif
51 
52 static const char *regatoi(const llvm_regex_t *, char *, int);
53 
54 static struct rerr {
55  int code;
56  const char *name;
57  const char *explain;
58 } rerrs[] = {
59  { REG_NOMATCH, "REG_NOMATCH", "llvm_regexec() failed to match" },
60  { REG_BADPAT, "REG_BADPAT", "invalid regular expression" },
61  { REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" },
62  { REG_ECTYPE, "REG_ECTYPE", "invalid character class" },
63  { REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" },
64  { REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" },
65  { REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" },
66  { REG_EPAREN, "REG_EPAREN", "parentheses not balanced" },
67  { REG_EBRACE, "REG_EBRACE", "braces not balanced" },
68  { REG_BADBR, "REG_BADBR", "invalid repetition count(s)" },
69  { REG_ERANGE, "REG_ERANGE", "invalid character range" },
70  { REG_ESPACE, "REG_ESPACE", "out of memory" },
71  { REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" },
72  { REG_EMPTY, "REG_EMPTY", "empty (sub)expression" },
73  { REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" },
74  { REG_INVARG, "REG_INVARG", "invalid argument to regex routine" },
75  { 0, "", "*** unknown regexp error code ***" }
76 };
77 
78 /*
79  - llvm_regerror - the interface to error numbers
80  = extern size_t llvm_regerror(int, const llvm_regex_t *, char *, size_t);
81  */
82 /* ARGSUSED */
83 size_t
84 llvm_regerror(int errcode, const llvm_regex_t *preg, char *errbuf, size_t errbuf_size)
85 {
86  struct rerr *r;
87  size_t len;
88  int target = errcode &~ REG_ITOA;
89  const char *s;
90  char convbuf[50];
91 
92  if (errcode == REG_ATOI)
93  s = regatoi(preg, convbuf, sizeof convbuf);
94  else {
95  for (r = rerrs; r->code != 0; r++)
96  if (r->code == target)
97  break;
98 
99  if (errcode&REG_ITOA) {
100  if (r->code != 0) {
101  assert(strlen(r->name) < sizeof(convbuf));
102  (void) llvm_strlcpy(convbuf, r->name, sizeof convbuf);
103  } else
104  (void)snprintf(convbuf, sizeof convbuf,
105  "REG_0x%x", target);
106  s = convbuf;
107  } else
108  s = r->explain;
109  }
110 
111  len = strlen(s) + 1;
112  if (errbuf_size > 0) {
113  llvm_strlcpy(errbuf, s, errbuf_size);
114  }
115 
116  return(len);
117 }
118 
119 /*
120  - regatoi - internal routine to implement REG_ATOI
121  */
122 static const char *
123 regatoi(const llvm_regex_t *preg, char *localbuf, int localbufsize)
124 {
125  struct rerr *r;
126 
127  for (r = rerrs; r->code != 0; r++)
128  if (strcmp(r->name, preg->re_endp) == 0)
129  break;
130  if (r->code == 0)
131  return("0");
132 
133  (void)snprintf(localbuf, localbufsize, "%d", r->code);
134  return(localbuf);
135 }
#define REG_INVARG
Definition: regex_impl.h:81
int code
Definition: regerror.c:55
#define REG_BADRPT
Definition: regex_impl.h:78
#define REG_EESCAPE
Definition: regex_impl.h:70
#define REG_EPAREN
Definition: regex_impl.h:73
#define REG_ATOI
Definition: regex_impl.h:82
#define REG_EMPTY
Definition: regex_impl.h:79
#define REG_EBRACE
Definition: regex_impl.h:74
#define REG_BADPAT
Definition: regex_impl.h:67
const char * re_endp
Definition: regex_impl.h:51
size_t llvm_regerror(int errcode, const llvm_regex_t *preg, char *errbuf, size_t errbuf_size)
Definition: regerror.c:84
static const char * regatoi(const llvm_regex_t *, char *, int)
Definition: regerror.c:123
size_t llvm_strlcpy(char *dst, const char *src, size_t siz)
Definition: regstrlcpy.c:29
static struct rerr rerrs[]
#define REG_ECOLLATE
Definition: regex_impl.h:68
#define REG_BADBR
Definition: regex_impl.h:75
const char * name
Definition: regerror.c:56
#define REG_EBRACK
Definition: regex_impl.h:72
#define REG_ERANGE
Definition: regex_impl.h:76
#define REG_NOMATCH
Definition: regex_impl.h:66
#define REG_ECTYPE
Definition: regex_impl.h:69
const char * explain
Definition: regerror.c:57
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
Definition: regerror.c:54
#define REG_ASSERT
Definition: regex_impl.h:80
#define REG_ITOA
Definition: regex_impl.h:83
#define REG_ESPACE
Definition: regex_impl.h:77
#define REG_ESUBREG
Definition: regex_impl.h:71