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/*
  This file is part of the Astrometry.net suite.
  Copyright 2008, 2010 Dustin Lang.

  The Astrometry.net suite 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, version 2.

  The Astrometry.net suite 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 the Astrometry.net suite ; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
*/

#ifndef AN_ERRORS_H
#define AN_ERRORS_H

#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <regex.h>

#include "an-bool.h"
#include "bl.h"
#include "keywords.h"

// forward declaration
struct errors;
typedef struct errors err_t;

typedef void (errfunc_t)(void* baton, err_t* errstate, const char* file, int line, const char* func, const char* format, va_list va);

struct errentry {
	char* file;
	int line;
	char* func;
	char* str;
};
typedef struct errentry errentry_t;

struct errors {
    FILE* print;
    anbool save;
	bl* errstack;

	errfunc_t* errfunc;
	void* baton;
};

/***    Global functions    ***/

err_t* errors_get_state();

// takes a (deep) snapshot of the current error handling state and pushes it onto the
// stack.
void errors_push_state();

// 
void errors_pop_state();

void
ATTRIB_FORMAT(printf,4,5)
report_error(const char* modfile, int modline, const char* modfunc, const char* fmt, ...);

void report_errno();

#define ERROR(fmt, ...) report_error(__FILE__, __LINE__, __func__, fmt, ##__VA_ARGS__)

#define SYSERROR(fmt, ...) do { report_errno(); report_error(__FILE__, __LINE__, __func__, fmt, ##__VA_ARGS__); } while(0)

void errors_log_to(FILE* f);

/* Sends all errors to the given function for processing;
 turns off printing and saving (ie, err_t.print and err_t.save)
 */
void errors_use_function(errfunc_t* func, void* baton);

void errors_print_stack(FILE* f);

void errors_clear_stack();

int errors_print_on_exit(FILE* fid);

// free globals.
void errors_free();

/*
 A convenience routine for times when you want to suppress printing error
 messages and instead capture them to a string.  Use in conjunction with
 the following...
 */
void errors_start_logging_to_string();

/*
 Reverts the error-processing system to its previous state and returns the
 captured error string.
 Returns a newly-allocated string which you must free().
 */
char* errors_stop_logging_to_string(const char* separator);

/*
 Convenience function to report an error from the regex module.
 */
void errors_regex_error(int errcode, const regex_t* re);

/***    End globals   ***/


err_t* error_new();

void error_free(err_t* e);

void error_stack_add_entryv(err_t* e, const char* file, int line, const char* func, const char* format, va_list va);

void error_stack_add_entry(err_t* e, const char* file, int line, const char* func, const char* str);

errentry_t* error_stack_get_entry(const err_t* e, int i);

int error_stack_N_entries(const err_t* e);

int error_nerrs(const err_t* e);

char* error_get_errstr(const err_t* e, int i);

void error_stack_clear(err_t* e);

void
ATTRIB_FORMAT(printf,5,6)
error_report(err_t* e, const char* module, int line, const char* func,
             const char* fmt, ...);

void error_reportv(err_t* e, const char* module, int line,
                   const char* func, const char* fmt, va_list va);

void error_print_stack(err_t* e, FILE* f);

// returns the error messages (not module:lines) in a newly-allocated string
char* error_get_errs(err_t* e, const char* separator);


#endif