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/*************************************************************************
** Ghostscript.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2018 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/>. **
*************************************************************************/
#ifndef GHOSTSCRIPT_HPP
#define GHOSTSCRIPT_HPP
#include <config.h>
#include <string>
#if defined(DISABLE_GS)
#include "iapi.h"
#elif defined(HAVE_LIBGS)
#include <ghostscript/iapi.h>
#else
#include "DLLoader.hpp"
#include "iapi.h"
#endif
#if defined(_WIN32) && !defined(_Windows)
#define _Windows
#endif
#if defined(DISABLE_GS)
struct Ghostscript
{
using Stdin = int (GSDLLCALLPTR)(void *caller, char *buf, int len);
using Stdout = int (GSDLLCALLPTR)(void *caller, const char *str, int len);
using Stderr = int (GSDLLCALLPTR)(void *caller, const char *str, int len);
Ghostscript () {}
Ghostscript (int argc, const char **argv, void *caller=0) {}
bool init (int argc, const char **argv, void *caller=0) {return false;}
bool available () {return false;}
bool revision (gsapi_revision_t *r) {return false;}
std::string revision (bool revonly=false) {return "";}
int set_stdio (Stdin in, Stdout out, Stderr err) {return 0;}
int run_string_begin (int user_errors, int *pexit_code) {return 0;}
int run_string_continue (const char *str, unsigned int length, int user_errors, int *pexit_code) {return 0;}
int run_string_end (int user_errors, int *pexit_code) {return 0;}
int exit () {return 0;}
const char* error_name (int code) {return 0;}
};
#else
/** Wrapper class of (a subset of) the Ghostscript API. */
class Ghostscript
#if !defined(HAVE_LIBGS)
: public DLLoader
#endif
{
public:
using Stdin = int (GSDLLCALLPTR)(void *caller, char *buf, int len);
using Stdout = int (GSDLLCALLPTR)(void *caller, const char *str, int len);
using Stderr = int (GSDLLCALLPTR)(void *caller, const char *str, int len);
public:
Ghostscript ();
Ghostscript (int argc, const char **argv, void *caller=0);
Ghostscript (const Ghostscript &gs) =delete;
~Ghostscript ();
bool init (int argc, const char **argv, void *caller=0);
bool available ();
bool revision (gsapi_revision_t *r);
std::string revision (bool revonly=false);
int set_stdio (Stdin in, Stdout out, Stderr err);
int run_string_begin (int user_errors, int *pexit_code);
int run_string_continue (const char *str, unsigned int length, int user_errors, int *pexit_code);
int run_string_end (int user_errors, int *pexit_code);
int exit ();
const char* error_name (int code);
static std::string LIBGS_NAME;
protected:
int init_with_args (int argc, char **argv);
int new_instance (void **psinst, void *caller);
void delete_instance ();
private:
void *_inst; ///< Ghostscript handle needed to call the gsapi_foo functions
};
#endif // DISABLE_GS
#endif
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