diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/plugins/imageformats/svg/qsvgiohandler.cpp | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/src/plugins/imageformats/svg/qsvgiohandler.cpp b/src/plugins/imageformats/svg/qsvgiohandler.cpp index 41b247b..405a760 100644 --- a/src/plugins/imageformats/svg/qsvgiohandler.cpp +++ b/src/plugins/imageformats/svg/qsvgiohandler.cpp @@ -64,6 +64,7 @@ public: } bool load(QIODevice *device); + static bool findSvgTag(QIODevice *device); QSvgRenderer *r; QSize defaultSize; @@ -86,6 +87,33 @@ bool QSvgIOHandlerPrivate::load(QIODevice *device) return loaded; } +bool QSvgIOHandlerPrivate::findSvgTag(QIODevice *device) +{ + qint64 pos = device->pos(); + device->seek(0); + char buffer[256]; + const char svg_tag[] = "<svg"; + + while (1) { + int size = device->read(buffer, 256); + for (int i=0; i<size - 5; ++i) { + if (!memcmp(buffer + i, svg_tag, 4)) { + if (buffer[i+4] == ' ' || buffer[i+4] == '\t' + || buffer[i+4] == '\n' || buffer[i+4] == '\r') + { + device->seek(pos); + return true; + } + } + } + if (device->atEnd()) + break; + device->seek(device->pos()-4); + } + device->seek(pos); + return false; +} + QSvgIOHandler::QSvgIOHandler() : d(new QSvgIOHandlerPrivate()) { @@ -101,9 +129,7 @@ QSvgIOHandler::~QSvgIOHandler() bool QSvgIOHandler::canRead() const { - QByteArray contents = device()->peek(80); - - return contents.contains("<svg"); + return QSvgIOHandlerPrivate::findSvgTag(device()); } @@ -182,8 +208,7 @@ bool QSvgIOHandler::supportsOption(ImageOption option) const bool QSvgIOHandler::canRead(QIODevice *device) { - QByteArray contents = device->peek(80); - return contents.contains("<svg"); + return QSvgIOHandlerPrivate::findSvgTag(device); } QT_END_NAMESPACE |