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Make guessFormatFromContents() a bit more private, since it is not supposed
to be used in new code. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@40790 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Georg Baum
parent
26e5f1a8ec
commit
de6e4a2937
189
src/Format.cpp
189
src/Format.cpp
@ -182,6 +182,193 @@ Format const * Formats::getFormat(string const & name) const
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}
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namespace {
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/** Guess the file format name (as in Format::name()) from contents.
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* Normally you don't want to use this directly, but rather
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* Formats::getFormatFromFile().
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*/
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string guessFormatFromContents(FileName const & fn)
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{
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// the different filetypes and what they contain in one of the first lines
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// (dots are any characters). (Herbert 20020131)
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// AGR Grace...
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// BMP BM...
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// EPS %!PS-Adobe-3.0 EPSF...
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// FIG #FIG...
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// FITS ...BITPIX...
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// GIF GIF...
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// JPG JFIF
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// PDF %PDF-...
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// PNG .PNG...
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// PBM P1... or P4 (B/W)
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// PGM P2... or P5 (Grayscale)
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// PPM P3... or P6 (color)
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// PS %!PS-Adobe-2.0 or 1.0, no "EPSF"!
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// SGI \001\332... (decimal 474)
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// TGIF %TGIF...
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// TIFF II... or MM...
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// XBM ..._bits[]...
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// XPM /* XPM */ sometimes missing (f.ex. tgif-export)
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// ...static char *...
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// XWD \000\000\000\151 (0x00006900) decimal 105
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//
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// GZIP \037\213 http://www.ietf.org/rfc/rfc1952.txt
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// ZIP PK... http://www.halyava.ru/document/ind_arch.htm
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// Z \037\235 UNIX compress
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// paranoia check
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if (fn.empty() || !fn.isReadableFile())
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return string();
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ifstream ifs(fn.toFilesystemEncoding().c_str());
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if (!ifs)
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// Couldn't open file...
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return string();
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// gnuzip
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static string const gzipStamp = "\037\213";
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// PKZIP
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static string const zipStamp = "PK";
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// ZIP containers (koffice, openoffice.org etc).
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static string const nonzipStamp = "\008\0\0\0mimetypeapplication/";
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// compress
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static string const compressStamp = "\037\235";
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// Maximum strings to read
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int const max_count = 50;
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int count = 0;
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string str;
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string format;
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bool firstLine = true;
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while ((count++ < max_count) && format.empty()) {
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if (ifs.eof()) {
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LYXERR(Debug::GRAPHICS, "filetools(getFormatFromContents)\n"
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<< "\tFile type not recognised before EOF!");
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break;
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}
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getline(ifs, str);
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string const stamp = str.substr(0, 2);
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if (firstLine && str.size() >= 2) {
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// at first we check for a zipped file, because this
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// information is saved in the first bytes of the file!
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// also some graphic formats which save the information
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// in the first line, too.
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if (prefixIs(str, gzipStamp)) {
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format = "gzip";
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} else if (stamp == zipStamp &&
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!contains(str, nonzipStamp)) {
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format = "zip";
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} else if (stamp == compressStamp) {
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format = "compress";
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// the graphics part
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} else if (stamp == "BM") {
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format = "bmp";
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} else if (stamp == "\001\332") {
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format = "sgi";
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// PBM family
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// Don't need to use str.at(0), str.at(1) because
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// we already know that str.size() >= 2
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} else if (str[0] == 'P') {
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switch (str[1]) {
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case '1':
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case '4':
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format = "pbm";
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break;
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case '2':
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case '5':
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format = "pgm";
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break;
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case '3':
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case '6':
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format = "ppm";
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}
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break;
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} else if ((stamp == "II") || (stamp == "MM")) {
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format = "tiff";
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} else if (prefixIs(str,"%TGIF")) {
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format = "tgif";
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} else if (prefixIs(str,"#FIG")) {
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format = "fig";
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} else if (prefixIs(str,"GIF")) {
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format = "gif";
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} else if (str.size() > 3) {
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int const c = ((str[0] << 24) & (str[1] << 16) &
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(str[2] << 8) & str[3]);
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if (c == 105) {
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format = "xwd";
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}
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}
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firstLine = false;
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}
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if (!format.empty())
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break;
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else if (contains(str,"EPSF"))
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// dummy, if we have wrong file description like
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// %!PS-Adobe-2.0EPSF"
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format = "eps";
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else if (contains(str, "Grace"))
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format = "agr";
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else if (contains(str, "JFIF"))
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format = "jpg";
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else if (contains(str, "%PDF"))
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format = "pdf";
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else if (contains(str, "PNG"))
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format = "png";
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else if (contains(str, "%!PS-Adobe")) {
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// eps or ps
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ifs >> str;
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if (contains(str,"EPSF"))
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format = "eps";
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else
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format = "ps";
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}
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else if (contains(str, "_bits[]"))
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format = "xbm";
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else if (contains(str, "XPM") || contains(str, "static char *"))
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format = "xpm";
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else if (contains(str, "BITPIX"))
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format = "fits";
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}
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if (!format.empty()) {
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LYXERR(Debug::GRAPHICS, "Recognised Fileformat: " << format);
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return format;
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}
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LYXERR(Debug::GRAPHICS, "filetools(getFormatFromContents)\n"
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<< "\tCouldn't find a known format!");
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return string();
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}
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}
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string Formats::getFormatFromFile(FileName const & filename) const
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{
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if (filename.empty())
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@ -217,7 +404,7 @@ string Formats::getFormatFromFile(FileName const & filename) const
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}
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#endif
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string const format = filename.guessFormatFromContents();
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string const format = guessFormatFromContents(filename);
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string const ext = getExtension(filename.absFileName());
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if (isZippedFileFormat(format) && !ext.empty()) {
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string const & fmt_name = formats.getFormatFromExtension(ext);
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@ -769,185 +769,6 @@ void FileName::changeExtension(string const & extension)
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}
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string FileName::guessFormatFromContents() const
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{
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// the different filetypes and what they contain in one of the first lines
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// (dots are any characters). (Herbert 20020131)
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// AGR Grace...
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// BMP BM...
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// EPS %!PS-Adobe-3.0 EPSF...
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// FIG #FIG...
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// FITS ...BITPIX...
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// GIF GIF...
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// JPG JFIF
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// PDF %PDF-...
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// PNG .PNG...
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// PBM P1... or P4 (B/W)
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// PGM P2... or P5 (Grayscale)
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// PPM P3... or P6 (color)
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// PS %!PS-Adobe-2.0 or 1.0, no "EPSF"!
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// SGI \001\332... (decimal 474)
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// TGIF %TGIF...
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// TIFF II... or MM...
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// XBM ..._bits[]...
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// XPM /* XPM */ sometimes missing (f.ex. tgif-export)
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// ...static char *...
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// XWD \000\000\000\151 (0x00006900) decimal 105
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//
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// GZIP \037\213 http://www.ietf.org/rfc/rfc1952.txt
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// ZIP PK... http://www.halyava.ru/document/ind_arch.htm
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// Z \037\235 UNIX compress
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// paranoia check
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if (empty() || !isReadableFile())
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return string();
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ifstream ifs(toFilesystemEncoding().c_str());
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if (!ifs)
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// Couldn't open file...
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return string();
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// gnuzip
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static string const gzipStamp = "\037\213";
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// PKZIP
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static string const zipStamp = "PK";
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// ZIP containers (koffice, openoffice.org etc).
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static string const nonzipStamp = "\008\0\0\0mimetypeapplication/";
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// compress
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static string const compressStamp = "\037\235";
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// Maximum strings to read
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int const max_count = 50;
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int count = 0;
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string str;
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string format;
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bool firstLine = true;
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while ((count++ < max_count) && format.empty()) {
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if (ifs.eof()) {
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LYXERR(Debug::GRAPHICS, "filetools(getFormatFromContents)\n"
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<< "\tFile type not recognised before EOF!");
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break;
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}
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getline(ifs, str);
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string const stamp = str.substr(0, 2);
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if (firstLine && str.size() >= 2) {
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// at first we check for a zipped file, because this
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// information is saved in the first bytes of the file!
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// also some graphic formats which save the information
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// in the first line, too.
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if (prefixIs(str, gzipStamp)) {
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format = "gzip";
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} else if (stamp == zipStamp &&
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!contains(str, nonzipStamp)) {
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format = "zip";
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} else if (stamp == compressStamp) {
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format = "compress";
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// the graphics part
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} else if (stamp == "BM") {
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format = "bmp";
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} else if (stamp == "\001\332") {
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format = "sgi";
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// PBM family
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// Don't need to use str.at(0), str.at(1) because
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// we already know that str.size() >= 2
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} else if (str[0] == 'P') {
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switch (str[1]) {
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case '1':
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case '4':
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format = "pbm";
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break;
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case '2':
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case '5':
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format = "pgm";
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break;
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case '3':
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case '6':
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format = "ppm";
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}
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break;
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} else if ((stamp == "II") || (stamp == "MM")) {
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format = "tiff";
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} else if (prefixIs(str,"%TGIF")) {
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format = "tgif";
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} else if (prefixIs(str,"#FIG")) {
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format = "fig";
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} else if (prefixIs(str,"GIF")) {
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format = "gif";
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} else if (str.size() > 3) {
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int const c = ((str[0] << 24) & (str[1] << 16) &
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(str[2] << 8) & str[3]);
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if (c == 105) {
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format = "xwd";
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}
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}
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firstLine = false;
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}
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if (!format.empty())
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break;
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else if (contains(str,"EPSF"))
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// dummy, if we have wrong file description like
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// %!PS-Adobe-2.0EPSF"
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format = "eps";
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else if (contains(str, "Grace"))
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format = "agr";
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else if (contains(str, "JFIF"))
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format = "jpg";
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else if (contains(str, "%PDF"))
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format = "pdf";
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else if (contains(str, "PNG"))
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format = "png";
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else if (contains(str, "%!PS-Adobe")) {
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// eps or ps
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ifs >> str;
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if (contains(str,"EPSF"))
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format = "eps";
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else
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format = "ps";
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}
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else if (contains(str, "_bits[]"))
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format = "xbm";
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else if (contains(str, "XPM") || contains(str, "static char *"))
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format = "xpm";
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else if (contains(str, "BITPIX"))
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format = "fits";
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}
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if (!format.empty()) {
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LYXERR(Debug::GRAPHICS, "Recognised Fileformat: " << format);
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return format;
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}
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LYXERR(Debug::GRAPHICS, "filetools(getFormatFromContents)\n"
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<< "\tCouldn't find a known format!");
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return string();
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}
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docstring const FileName::relPath(string const & path) const
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{
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// FIXME UNICODE
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@ -169,12 +169,6 @@ public:
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*/
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void changeExtension(std::string const & extension);
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/** Guess the file format name (as in Format::name()) from contents.
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Normally you don't want to use this directly, but rather
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Formats::getFormatFromFile().
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*/
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std::string guessFormatFromContents() const;
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static FileName fromFilesystemEncoding(std::string const & name);
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/// (securely) create a temporary file with the given mask.
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/// \p mask must be in filesystem encoding, if it contains a
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