56 lines
1.2 KiB
C++
Executable File
56 lines
1.2 KiB
C++
Executable File
#include <cstring>
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#include "replace.h"
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int Replace::run (
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std::string& buffer,
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const std::string& find,
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const std::string& replace,
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bool matchCase )
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{
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if ( buffer.empty() || find.empty() )
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return 0;
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std::string output;
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size_t capacity = buffer.size();
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int diff = replace.size() - find.size();
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if ( diff > 0 )
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capacity += diff * BUFSIZ;
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output.reserve ( capacity );
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size_t findLength = find.size();
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int matchCount = 0;
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// comparison function pointer
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int ( *comp ) ( const char *, const char *, size_t ) =
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#ifdef __WXMSW__
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( matchCase ) ? strncmp : strnicmp;
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#else
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( matchCase ) ? strncmp : strncasecmp;
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#endif
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char *bufferPtr;
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const char *findPtr, *replacePtr;
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bufferPtr = ( char * ) buffer.c_str();
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findPtr = find.c_str();
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replacePtr = replace.c_str();
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while ( *bufferPtr )
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{
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if ( !comp ( ( const char * ) bufferPtr, findPtr, findLength ) )
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{
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++matchCount;
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output += replacePtr;
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bufferPtr += findLength;
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}
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else
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{
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output += *bufferPtr;
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++bufferPtr;
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}
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}
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if ( !matchCount )
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return 0;
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buffer = output;
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return matchCount;
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}
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