/[dtapublic]/projs/trunk/shared_source/c_tcl_base_7_5_w_mods/regerror.c
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Revision 67 - (show annotations) (download)
Mon Oct 31 00:57:34 2016 UTC (6 years, 2 months ago) by dashley
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File size: 3667 byte(s)
Header and footer cleanup.
1 /* $Header$ */
2 /*
3 * regerror - error-code expansion
4 *
5 * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
6 *
7 * Development of this software was funded, in part, by Cray Research Inc.,
8 * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
9 * Corporation, none of whom are responsible for the results. The author
10 * thanks all of them.
11 *
12 * Redistribution and use in source and binary forms -- with or without
13 * modification -- are permitted for any purpose, provided that
14 * redistributions in source form retain this entire copyright notice and
15 * indicate the origin and nature of any modifications.
16 *
17 * I'd appreciate being given credit for this package in the documentation
18 * of software which uses it, but that is not a requirement.
19 *
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
23 * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 */
32
33 #include "regguts.h"
34
35 /* unknown-error explanation */
36 static char unk[] = "*** unknown regex error code 0x%x ***";
37
38 /* struct to map among codes, code names, and explanations */
39 static struct rerr {
40 int code;
41 char *name;
42 char *explain;
43 } rerrs[] = {
44 /* the actual table is built from regex.h */
45 # include "regerrs.h"
46 { -1, "", "oops" }, /* explanation special-cased in code */
47 };
48
49 /*
50 - regerror - the interface to error numbers
51 */
52 /* ARGSUSED */
53 size_t /* actual space needed (including NUL) */
54 regerror(errcode, preg, errbuf, errbuf_size)
55 int errcode; /* error code, or REG_ATOI or REG_ITOA */
56 CONST regex_t *preg; /* associated regex_t (unused at present) */
57 char *errbuf; /* result buffer (unless errbuf_size==0) */
58 size_t errbuf_size; /* available space in errbuf, can be 0 */
59 {
60 struct rerr *r;
61 char *msg;
62 char convbuf[sizeof(unk)+50]; /* 50 = plenty for int */
63 size_t len;
64 int icode;
65
66 switch (errcode) {
67 case REG_ATOI: /* convert name to number */
68 for (r = rerrs; r->code >= 0; r++)
69 if (strcmp(r->name, errbuf) == 0)
70 break;
71 sprintf(convbuf, "%d", r->code); /* -1 for unknown */
72 msg = convbuf;
73 break;
74 case REG_ITOA: /* convert number to name */
75 icode = atoi(errbuf); /* not our problem if this fails */
76 for (r = rerrs; r->code >= 0; r++)
77 if (r->code == icode)
78 break;
79 if (r->code >= 0)
80 msg = r->name;
81 else { /* unknown; tell him the number */
82 sprintf(convbuf, "REG_%u", (unsigned)icode);
83 msg = convbuf;
84 }
85 break;
86 default: /* a real, normal error code */
87 for (r = rerrs; r->code >= 0; r++)
88 if (r->code == errcode)
89 break;
90 if (r->code >= 0)
91 msg = r->explain;
92 else { /* unknown; say so */
93 sprintf(convbuf, unk, errcode);
94 msg = convbuf;
95 }
96 break;
97 }
98
99 len = strlen(msg) + 1; /* space needed, including NUL */
100 if (errbuf_size > 0) {
101 if (errbuf_size > len)
102 strcpy(errbuf, msg);
103 else { /* truncate to fit */
104 strncpy(errbuf, msg, errbuf_size-1);
105 errbuf[errbuf_size-1] = '\0';
106 }
107 }
108
109 return len;
110 }
111
112 /* End of regerror.c */

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