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Use a.rfind(b, 0) == 0 instead of a.find(b) == 0 to reduce processing time when checking that a starts wit b, #1459

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main
Ingo Weyrich 4 years ago
parent aa43be4782
commit a6a47346a8
3 changed files with 7 additions and 7 deletions
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4
src/futils.cpp
Unescape Escape View File

@ -275,7 +275,7 @@ namespace Exiv2 {
, { "-" ,pStdin , false } , { "-" ,pStdin , false }
}; };
for ( size_t i = 0 ; result == pFile && i < sizeof(prots)/sizeof(prots[0]) ; i ++ ) for ( size_t i = 0 ; result == pFile && i < sizeof(prots)/sizeof(prots[0]) ; i ++ )
if ( path.find(prots[i].name) == 0 ) if ( path.rfind(prots[i].name, 0) == 0 )
// URL's require data. Stdin == "-" and no further data // URL's require data. Stdin == "-" and no further data
if ( prots[i].isUrl ? path.size() > prots[i].name.size() : path.size() == prots[i].name.size() ) if ( prots[i].isUrl ? path.size() > prots[i].name.size() : path.size() == prots[i].name.size() )
result = prots[i].prot; result = prots[i].prot;
@ -300,7 +300,7 @@ namespace Exiv2 {
, { L"-" ,pStdin , false } , { L"-" ,pStdin , false }
}; };
for ( size_t i = 0 ; result == pFile && i < sizeof(prots)/sizeof(prots[0]) ; i ++ ) for ( size_t i = 0 ; result == pFile && i < sizeof(prots)/sizeof(prots[0]) ; i ++ )
if ( path.find(prots[i].name) == 0 ) if ( path.rfind(prots[i].name, 0) == 0 )
// URL's require data. Stdin == "-" and no further data // URL's require data. Stdin == "-" and no further data
if ( prots[i].isUrl ? path.size() > prots[i].name.size() : path.size() == prots[i].name.size() ) if ( prots[i].isUrl ? path.size() > prots[i].name.size() : path.size() == prots[i].name.size() )
result = prots[i].prot; result = prots[i].prot;

2
src/jpgimage.cpp
Unescape Escape View File

@ -665,7 +665,7 @@ namespace Exiv2 {
// 2 | 0xe1 APP1 | 911 | Exif..MM.*.......%.........#.... // 2 | 0xe1 APP1 | 911 | Exif..MM.*.......%.........#....
// 915 | 0xe1 APP1 | 870 | http://ns.adobe.com/xap/1.0/.<x: // 915 | 0xe1 APP1 | 870 | http://ns.adobe.com/xap/1.0/.<x:
// 1787 | 0xe1 APP1 | 65460 | http://ns.adobe.com/xmp/extensio // 1787 | 0xe1 APP1 | 65460 | http://ns.adobe.com/xmp/extensio
if (option == kpsXMP && signature.find("http://ns.adobe.com/x") == 0) { if (option == kpsXMP && signature.rfind("http://ns.adobe.com/x", 0) == 0) {
// extract XMP // extract XMP
if (size > 0) { if (size > 0) {
io_->seek(-bufRead, BasicIo::cur); io_->seek(-bufRead, BasicIo::cur);

8
src/pentaxmn_int.cpp
Unescape Escape View File

@ -1316,7 +1316,7 @@ namespace Exiv2 {
; ;
if ( value.count() == 4 ) { if ( value.count() == 4 ) {
std::string model = getKeyString("Exif.Image.Model" ,metadata); std::string model = getKeyString("Exif.Image.Model" ,metadata);
if ( model.find("PENTAX K-3")==0 && lensInfo->count() == 128 && lensInfo->toLong(1) == 168 && lensInfo->toLong(2) == 144 ) index = 7; if ( model.rfind("PENTAX K-3", 0)==0 && lensInfo->count() == 128 && lensInfo->toLong(1) == 168 && lensInfo->toLong(2) == 144 ) index = 7;
} }
if ( index > 0 ) { if ( index > 0 ) {
@ -1344,14 +1344,14 @@ namespace Exiv2 {
; ;
if ( value.count() == 4 ) { if ( value.count() == 4 ) {
std::string model = getKeyString("Exif.Image.Model" ,metadata); std::string model = getKeyString("Exif.Image.Model" ,metadata);
if ( model.find("PENTAX K-3")==0 && lensInfo->count() == 128 && lensInfo->toLong(1) == 131 && lensInfo->toLong(2) == 128 ) if ( model.rfind("PENTAX K-3", 0)==0 && lensInfo->count() == 128 && lensInfo->toLong(1) == 131 && lensInfo->toLong(2) == 128 )
index = 6; index = 6;
} }
if ( value.count() == 2 ) { if ( value.count() == 2 ) {
std::string model = getKeyString("Exif.Image.Model" ,metadata); std::string model = getKeyString("Exif.Image.Model" ,metadata);
if ( model.find("PENTAX K100D")==0 && lensInfo->count() == 44 ) if ( model.rfind("PENTAX K100D", 0)==0 && lensInfo->count() == 44 )
index = 6; index = 6;
if ( model.find("PENTAX *ist DL")==0 && lensInfo->count() == 36 ) if ( model.rfind("PENTAX *ist DL", 0)==0 && lensInfo->count() == 36 )
index = 6; index = 6;
} }

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