52 lines
2.2 KiB
C
52 lines
2.2 KiB
C
/*
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* Copyright (c) 2014, 2015, 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* regex/regerror.c
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* Regular expression error reporting.
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*/
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#include <regex.h>
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#include <stdio.h>
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#include <string.h>
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size_t regerror(int errnum,
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const regex_t* restrict regex,
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char* restrict errbuf,
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size_t errbuf_size)
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{
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(void) regex;
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const char* msg = "Unknown regular expression error";
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switch ( errnum )
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{
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case REG_NOMATCH: msg = "Regular expression does not match"; break;
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case REG_BADPAT: msg = "Invalid regular expression"; break;
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case REG_ECOLLATE: msg = "Invalid collating element referenced"; break;
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case REG_ECTYPE: msg = "Invalid character class type referenced"; break;
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case REG_EESCAPE: msg = "Trailing <backslash> character in pattern"; break;
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case REG_ESUBREG: msg = "Number in \\digit invalid or in error"; break;
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case REG_EBRACK: msg = "\"[]\" imbalance"; break;
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case REG_EPAREN: msg = "\"\\(\\)\" or \"()\" imbalance"; break;
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case REG_EBRACE: msg = "\"\\{\\}\" imbalance"; break;
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case REG_BADBR: msg = "Content of \"\\{\\}\" invalid: not a number, number too large, more than two numbers, first larger than second"; break;
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case REG_ERANGE: msg = "Invalid endpoint in range expression"; break;
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case REG_ESPACE: msg = "Out of memory"; break;
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case REG_BADRPT: msg = "'?', '*', or '+' not preceded by valid regular expression"; break;
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case REG_INVARG: msg = "Invalid arguments"; break;
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}
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if ( errbuf_size )
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strlcpy(errbuf, msg, errbuf_size);
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return strlen(msg) + 1;
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}
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