/[dtapublic]/projs/trunk/shared_source/c_tcl_base_7_5_w_mods/regerror.c
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Annotation of /projs/trunk/shared_source/c_tcl_base_7_5_w_mods/regerror.c

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Revision 25 - (hide annotations) (download)
Sat Oct 8 06:43:03 2016 UTC (7 years, 4 months ago) by dashley
Original Path: sf_code/esrgpcpj/shared/tcl_base/regerror.c
File MIME type: text/plain
File size: 3995 byte(s)
Initial commit.
1 dashley 25 /* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/regerror.c,v 1.1.1.1 2001/06/13 04:32:13 dtashley Exp $ */
2    
3     /*
4     * regerror - error-code expansion
5     *
6     * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
7     *
8     * Development of this software was funded, in part, by Cray Research Inc.,
9     * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
10     * Corporation, none of whom are responsible for the results. The author
11     * thanks all of them.
12     *
13     * Redistribution and use in source and binary forms -- with or without
14     * modification -- are permitted for any purpose, provided that
15     * redistributions in source form retain this entire copyright notice and
16     * indicate the origin and nature of any modifications.
17     *
18     * I'd appreciate being given credit for this package in the documentation
19     * of software which uses it, but that is not a requirement.
20     *
21     * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
22     * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
23     * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
24     * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25     * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26     * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27     * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28     * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29     * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
30     * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31     *
32     */
33    
34     #include "regguts.h"
35    
36     /* unknown-error explanation */
37     static char unk[] = "*** unknown regex error code 0x%x ***";
38    
39     /* struct to map among codes, code names, and explanations */
40     static struct rerr {
41     int code;
42     char *name;
43     char *explain;
44     } rerrs[] = {
45     /* the actual table is built from regex.h */
46     # include "regerrs.h"
47     { -1, "", "oops" }, /* explanation special-cased in code */
48     };
49    
50     /*
51     - regerror - the interface to error numbers
52     */
53     /* ARGSUSED */
54     size_t /* actual space needed (including NUL) */
55     regerror(errcode, preg, errbuf, errbuf_size)
56     int errcode; /* error code, or REG_ATOI or REG_ITOA */
57     CONST regex_t *preg; /* associated regex_t (unused at present) */
58     char *errbuf; /* result buffer (unless errbuf_size==0) */
59     size_t errbuf_size; /* available space in errbuf, can be 0 */
60     {
61     struct rerr *r;
62     char *msg;
63     char convbuf[sizeof(unk)+50]; /* 50 = plenty for int */
64     size_t len;
65     int icode;
66    
67     switch (errcode) {
68     case REG_ATOI: /* convert name to number */
69     for (r = rerrs; r->code >= 0; r++)
70     if (strcmp(r->name, errbuf) == 0)
71     break;
72     sprintf(convbuf, "%d", r->code); /* -1 for unknown */
73     msg = convbuf;
74     break;
75     case REG_ITOA: /* convert number to name */
76     icode = atoi(errbuf); /* not our problem if this fails */
77     for (r = rerrs; r->code >= 0; r++)
78     if (r->code == icode)
79     break;
80     if (r->code >= 0)
81     msg = r->name;
82     else { /* unknown; tell him the number */
83     sprintf(convbuf, "REG_%u", (unsigned)icode);
84     msg = convbuf;
85     }
86     break;
87     default: /* a real, normal error code */
88     for (r = rerrs; r->code >= 0; r++)
89     if (r->code == errcode)
90     break;
91     if (r->code >= 0)
92     msg = r->explain;
93     else { /* unknown; say so */
94     sprintf(convbuf, unk, errcode);
95     msg = convbuf;
96     }
97     break;
98     }
99    
100     len = strlen(msg) + 1; /* space needed, including NUL */
101     if (errbuf_size > 0) {
102     if (errbuf_size > len)
103     strcpy(errbuf, msg);
104     else { /* truncate to fit */
105     strncpy(errbuf, msg, errbuf_size-1);
106     errbuf[errbuf_size-1] = '\0';
107     }
108     }
109    
110     return len;
111     }
112    
113     /* $History: regerror.c $
114     *
115     * ***************** Version 1 *****************
116     * User: Dtashley Date: 1/02/01 Time: 12:10a
117     * Created in $/IjuScripter, IjuConsole/Source/Tcl Base
118     * Initial check-in.
119     */
120    
121     /* End of REGERROR.C */

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