shared_source/c_tcl_base_7_5_w_mods/regerror.c

/* $Header$ */
/*
 * 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[] = {
        /* the actual table is built from regex.h */
#       include "regerrs.h"
        { -1,   "",     "oops" },       /* explanation special-cased in code */
};

/*
 - regerror - the interface to error numbers
 */
/* ARGSUSED */
size_t                          /* actual space needed (including NUL) */
regerror(errcode, preg, errbuf, errbuf_size)
int errcode;                    /* 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 */
{
        struct rerr *r;
        char *msg;
        char convbuf[sizeof(unk)+50];   /* 50 = plenty for int */
        size_t len;
        int icode;

        switch (errcode) {
        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 == errcode)
                                break;
                if (r->code >= 0)
                        msg = r->explain;
                else {                  /* unknown; say so */
                        sprintf(convbuf, unk, errcode);
                        msg = convbuf;
                }
                break;
        }

        len = strlen(msg) + 1;          /* space needed, including NUL */
        if (errbuf_size > 0) {
                if (errbuf_size > len)
                        strcpy(errbuf, msg);
                else {                  /* truncate to fit */
                        strncpy(errbuf, msg, errbuf_size-1);
                        errbuf[errbuf_size-1] = '\0';
                }
        }

        return len;
}

/* End of regerror.c */
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 */