Annotation of libelwix/src/regex.c, revision 1.1
1.1 ! misho 1: /*************************************************************************
! 2: * (C) 2013 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
! 3: * by Michael Pounov <misho@elwix.org>
! 4: *
! 5: * $Author: misho $
! 6: * $Id: global.h,v 1.13 2012/08/29 13:51:29 misho Exp $
! 7: *
! 8: **************************************************************************
! 9: The ELWIX and AITNET software is distributed under the following
! 10: terms:
! 11:
! 12: All of the documentation and software included in the ELWIX and AITNET
! 13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
! 14:
! 15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
! 16: by Michael Pounov <misho@elwix.org>. All rights reserved.
! 17:
! 18: Redistribution and use in source and binary forms, with or without
! 19: modification, are permitted provided that the following conditions
! 20: are met:
! 21: 1. Redistributions of source code must retain the above copyright
! 22: notice, this list of conditions and the following disclaimer.
! 23: 2. Redistributions in binary form must reproduce the above copyright
! 24: notice, this list of conditions and the following disclaimer in the
! 25: documentation and/or other materials provided with the distribution.
! 26: 3. All advertising materials mentioning features or use of this software
! 27: must display the following acknowledgement:
! 28: This product includes software developed by Michael Pounov <misho@elwix.org>
! 29: ELWIX - Embedded LightWeight unIX and its contributors.
! 30: 4. Neither the name of AITNET nor the names of its contributors
! 31: may be used to endorse or promote products derived from this software
! 32: without specific prior written permission.
! 33:
! 34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
! 35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 44: SUCH DAMAGE.
! 45: */
! 46: #include "global.h"
! 47:
! 48:
! 49: /*
! 50: * regex_Verify() - Function for verify data match in regex expression
! 51: *
! 52: * @csRegex = Regulare expression pattern
! 53: * @csData = Data for check and verify
! 54: * @startPos = Return start positions
! 55: * @endPos = Return end positions
! 56: * return: NULL not match or error; !=NULL begin of matched data
! 57: */
! 58: const char *
! 59: regex_Verify(const char *csRegex, const char *csData, int *startPos, int *endPos)
! 60: {
! 61: regex_t re;
! 62: regmatch_t match;
! 63: char szErr[STRSIZ];
! 64: int ret, flg;
! 65: const char *pos;
! 66:
! 67: if (!csRegex || !csData)
! 68: return NULL;
! 69:
! 70: if ((ret = regcomp(&re, csRegex, REG_EXTENDED))) {
! 71: regerror(ret, &re, szErr, STRSIZ);
! 72: elwix_SetErr(ret, "%s", szErr);
! 73: regfree(&re);
! 74: return NULL;
! 75: }
! 76:
! 77: for (ret = flg = 0, pos = csData; !(ret = regexec(&re, pos, 1, &match, flg));
! 78: pos += match.rm_eo, flg = REG_NOTBOL) {
! 79: if (startPos)
! 80: *startPos = match.rm_so;
! 81: if (endPos)
! 82: *endPos = match.rm_eo;
! 83:
! 84: pos += match.rm_so;
! 85: break;
! 86: }
! 87:
! 88: if (ret) {
! 89: regerror(ret, &re, szErr, STRSIZ);
! 90: elwix_SetErr(ret, "%s", szErr);
! 91: pos = NULL;
! 92: }
! 93:
! 94: regfree(&re);
! 95: return pos;
! 96: }
! 97:
! 98: /*
! 99: * regex_Get() - Function for get data match in regex expression
! 100: *
! 101: * @csRegex = Regulare expression pattern
! 102: * @csData = Data from get
! 103: * @psString = Returned string if match
! 104: * @strLen = Length of string
! 105: * return: 0 not match; >0 count of returned chars
! 106: */
! 107: int
! 108: regex_Get(const char *csRegex, const char *csData, char * __restrict psString, int strLen)
! 109: {
! 110: int sp, ep, len;
! 111: const char *str;
! 112:
! 113: if (!csRegex || !csData)
! 114: return -1;
! 115:
! 116: str = regex_Verify(csRegex, csData, &sp, &ep);
! 117: if (!str)
! 118: return 0;
! 119:
! 120: len = ep - sp;
! 121: if (psString && strLen) {
! 122: memset(psString, 0, strLen);
! 123: strncpy(psString, str, strLen <= len ? strLen - 1 : len);
! 124: }
! 125:
! 126: return len;
! 127: }
! 128:
! 129: /*
! 130: * regex_Replace() - Function for replace data match in regex expression with newdata
! 131: *
! 132: * @csRegex = Regulare expression pattern
! 133: * @csData = Source data
! 134: * @csNew = Data for replace
! 135: * return: NULL not match or error; !=NULL allocated new string, must be e_free after use!
! 136: */
! 137: char *
! 138: regex_Replace(const char *csRegex, const char *csData, const char *csNew)
! 139: {
! 140: int sp, ep, len;
! 141: char *tmp, *str = NULL;
! 142:
! 143: if (!csRegex || !csData)
! 144: return NULL;
! 145:
! 146: if (!regex_Verify(csRegex, csData, &sp, &ep))
! 147: return NULL;
! 148:
! 149: // ___ before match
! 150: len = sp + 1;
! 151: str = e_malloc(len);
! 152: if (!str)
! 153: return NULL;
! 154: else
! 155: strlcpy(str, csData, len);
! 156: // * replace match *
! 157: if (csNew) {
! 158: len += strlen(csNew);
! 159: tmp = e_realloc(str, len);
! 160: if (!tmp) {
! 161: e_free(str);
! 162: return NULL;
! 163: } else {
! 164: str = tmp;
! 165: strlcat(str, csNew, len);
! 166: }
! 167: }
! 168: // after match ___
! 169: len += strlen(csData) - ep;
! 170: tmp = e_realloc(str, len);
! 171: if (!tmp) {
! 172: e_free(str);
! 173: return NULL;
! 174: } else {
! 175: str = tmp;
! 176: strlcat(str, csData + ep, len);
! 177: }
! 178:
! 179: return str;
! 180: }
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