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64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2014.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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string/stresep.cpp
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Extract a token from a string while handling escape characters.
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*******************************************************************************/
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#include <string.h>
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extern "C" char* stresep(char** string_ptr, const char* delim, int escape)
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{
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char* token = *string_ptr;
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if ( !token )
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return NULL;
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size_t consumed_length = 0;
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size_t token_length = 0;
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bool escaped = false;
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while ( true )
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{
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char c = token[consumed_length++];
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bool true_nul = c == '\0';
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if ( !escaped && escape && (unsigned char) c == (unsigned char) escape )
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{
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escaped = true;
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continue;
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}
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if ( !escaped && c != '\0' )
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{
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for ( size_t i = 0; delim[i]; i++ )
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{
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if ( c != delim[i] )
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{
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c = '\0';
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break;
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}
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}
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}
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token[token_length++] = c;
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escaped = false;
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if ( c == '\0' )
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{
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*string_ptr = true_nul ? (char*) NULL : token + consumed_length;
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return token;
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}
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}
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}
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