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/*************************************************************************
** FileFinder.cpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2016 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include <config.h>
#ifdef MIKTEX
#include "MessageException.h"
#include "MiKTeXCom.h"
static MiKTeXCom *miktex=0;
#else
#ifdef KPSE_CXX_UNSAFE
extern "C" {
#endif
#include <kpathsea/kpathsea.h>
#ifdef KPSE_CXX_UNSAFE
}
#endif
#endif
#include <cstdlib>
#include <fstream>
#include <map>
#include <string>
#include "FileFinder.h"
#include "FileSystem.h"
#include "FontMap.h"
#include "Message.h"
#include "Process.h"
// ---------------------------------------------------
static bool _initialized = false;
static bool _mktex_enabled = false;
// ---------------------------------------------------
static const char* find_file (const std::string &fname, const char *ftype);
static const char* find_mapped_file (std::string fname);
static const char* mktex (const std::string &fname);
/** Initializes the file finder. This function must be called before any other
* FileFinder function.
* @param[in] argv0 argv[0] of main() function
* @param[in] progname name of application using the FileFinder
* @param[in] enable_mktexmf if true, tfm and mf file generation is activated */
void FileFinder::init (const char *argv0, const char *progname, bool enable_mktexmf) {
if (_initialized)
return;
_mktex_enabled = enable_mktexmf;
#ifdef MIKTEX
miktex = new MiKTeXCom;
#else
kpse_set_program_name(argv0, progname);
// enable tfm and mf generation (actually invoked by calls of kpse_make_tex)
kpse_set_program_enabled(kpse_tfm_format, 1, kpse_src_env);
kpse_set_program_enabled(kpse_mf_format, 1, kpse_src_env);
kpse_make_tex_discard_errors = true; // suppress messages from mktexFOO tools
#ifdef TEXLIVEWIN32
texlive_gs_init();
#endif
#endif
_initialized = true;
}
/** Cleans up the FileFinder. This function must be called before leaving the
* application's main() function. */
void FileFinder::finish () {
#ifdef MIKTEX
if (miktex) {
delete miktex;
miktex = 0;
}
#endif
_initialized = false;
}
/** Returns the version string of the underlying file searching library (kpathsea, MiKTeX) */
std::string FileFinder::version () {
#ifdef MIKTEX
bool autoinit=false;
try {
if (!_initialized) {
init("", "", false);
autoinit = true;
}
std::string ret = miktex->getVersion();
if (autoinit)
finish();
return ret;
}
catch (MessageException &e) {
if (autoinit)
finish();
}
#else
if (const char *v = strrchr(KPSEVERSION, ' '))
return (std::string(KPSEVERSION).substr(0, 9) == "kpathsea ") ? v+1 : KPSEVERSION;
if (strlen(KPSEVERSION) > 0)
return KPSEVERSION;
#endif
return "unknown";
}
/** Determines filetype by the filename extension and calls kpse_find_file
* to actually look up the file.
* @param[in] fname name of file to look up
* @param[in] ftype expected file format of file fname; if 0, it's derived from the filename suffix
* @return file path on success, 0 otherwise */
static const char* find_file (const std::string &fname, const char *ftype) {
if (!_initialized || fname.empty())
return 0;
static std::string buf;
// try to lookup the file in the current working directory
buf = FileSystem::getcwd()+"/"+fname;
if (FileSystem::exists(buf.c_str()))
return buf.c_str();
std::string ext;
if (ftype)
ext = ftype;
else {
size_t pos = fname.rfind('.');
if (pos == std::string::npos)
return 0; // no extension and no file type => no search
ext = fname.substr(pos+1);
}
#ifdef MIKTEX
if (ext == "dll" || ext == "exe") {
// lookup dll and exe files in the MiKTeX bin directory first
buf = miktex->getBinDir() + "/" + fname;
if (FileSystem::exists(buf.c_str()))
return buf.c_str();
}
else if (ext == "cmap") {
// The MiKTeX SDK doesn't support the lookup of files without suffix (yet), thus
// it's not possible to find cmap files which usually don't have a suffix. In order
// to work around this, we try to lookup the files by calling kpsewhich.
Process process("kpsewhich", std::string("-format=cmap ")+fname);
process.run(&buf);
return buf.empty() ? 0 : buf.c_str();
}
try {
return miktex->findFile(fname.c_str());
}
catch (const MessageException &e) {
return 0;
}
#else
#ifdef TEXLIVEWIN32
if (ext == "exe") {
// lookup exe files in directory where dvisvgm is located
if (const char *path = kpse_var_value("SELFAUTOLOC")) {
buf = std::string(path) + "/" + fname;
return FileSystem::exists(buf.c_str()) ? buf.c_str() : 0;
}
return 0;
}
#endif
static std::map<std::string, kpse_file_format_type> types;
if (types.empty()) {
types["tfm"] = kpse_tfm_format;
types["pfb"] = kpse_type1_format;
types["vf"] = kpse_vf_format;
types["mf"] = kpse_mf_format;
types["ttc"] = kpse_truetype_format;
types["ttf"] = kpse_truetype_format;
types["otf"] = kpse_opentype_format;
types["map"] = kpse_fontmap_format;
types["cmap"] = kpse_cmap_format;
types["sty"] = kpse_tex_format;
types["enc"] = kpse_enc_format;
types["pro"] = kpse_tex_ps_header_format;
types["sfd"] = kpse_sfd_format;
}
std::map<std::string, kpse_file_format_type>::iterator it = types.find(ext.c_str());
if (it == types.end())
return 0;
if (char *path = kpse_find_file(fname.c_str(), it->second, 0)) {
// In the current version of libkpathsea, each call of kpse_find_file produces
// a memory leak since the path buffer is not freed. I don't think we can do
// anything against it here...
buf = path;
std::free(path);
return buf.c_str();
}
return 0;
#endif
}
/** Checks whether the given file is mapped to a different name and if the
* file can be found under this name.
* @param[in] fname name of file to look up
* @return file path on success, 0 otherwise */
static const char* find_mapped_file (std::string fname) {
size_t pos = fname.rfind('.');
if (pos == std::string::npos)
return 0;
const std::string ext = fname.substr(pos+1); // file extension
const std::string base = fname.substr(0, pos);
if (const FontMap::Entry *entry = FontMap::instance().lookup(base)) {
const char *path=0;
if (entry->fontname.find('.') != std::string::npos) // does the mapped filename has an extension?
path = find_file(entry->fontname, 0); // look for that file
else { // otherwise, use extension of unmapped file
fname = entry->fontname + "." + ext;
(path = find_file(fname, 0)) || (path = mktex(fname));
}
return path;
}
return 0;
}
/** Runs external mktexFOO tool to create missing tfm or mf file.
* @param[in] fname name of file to build
* @return file path on success, 0 otherwise */
static const char* mktex (const std::string &fname) {
if (!_initialized)
return 0;
size_t pos = fname.rfind('.');
if (!_mktex_enabled || pos == std::string::npos)
return 0;
std::string ext = fname.substr(pos+1); // file extension
if (ext != "tfm" && ext != "mf")
return 0;
const char *path = 0;
#ifdef MIKTEX
// maketfm and makemf are located in miktex/bin which is in the search PATH
std::string toolname = (ext == "tfm" ? "miktex-maketfm" : "miktex-makemf");
system((toolname+".exe "+fname).c_str());
path = find_file(fname, 0);
#else
kpse_file_format_type type = (ext == "tfm" ? kpse_tfm_format : kpse_mf_format);
path = kpse_make_tex(type, fname.c_str());
#endif
return path;
}
/** Searches a file in the TeX directory tree.
* If the file doesn't exist, maximal two further steps are applied
* (if "extended" is true):
* - checks whether the filename is mapped to a different name and returns
* the path to that name
* - in case of tfm or mf files: invokes the external mktextfm/mktexmf tool
* to create the missing file
* @param[in] fname name of file to look up
* @param[in] ftype type/format of file to look up
* @param[in] extended if true, use fontmap lookup and mktexFOO calls
* @return path to file on success, 0 otherwise */
const char* FileFinder::lookup (const std::string &fname, const char *ftype, bool extended) {
const char *path;
if ((path = find_file(fname, ftype)) || (extended && ((path = find_mapped_file(fname)) || (path = mktex(fname)))))
return path;
return 0;
}
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