| /* |
| * 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. |
| * |
| * $PostgreSQL: pgsql/src/backend/regex/regerror.c,v 1.28 2008/02/14 17:33:37 tgl Exp $ |
| * |
| */ |
| |
| #include "regex/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; |
| const char *name; |
| const char *explain; |
| } rerrs[] = |
| |
| { |
| /* the actual table is built from regex.h */ |
| #include "regex/regerrs.h" |
| { |
| -1, "", "oops" |
| }, /* explanation special-cased in code */ |
| }; |
| |
| /* |
| * pg_regerror - the interface to error numbers |
| */ |
| /* ARGSUSED */ |
| size_t /* actual space needed (including NUL) */ |
| pg_regerror(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; |
| const 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; |
| } |