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/* Generic support functions for Xcftools
*
* This file was written by Henning Makholm <henning@makholm.net>
* It is hereby in the public domain.
*
* In jurisdictions that do not recognise grants of copyright to the
* public domain: I, the author and (presumably, in those jurisdictions)
* copyright holder, hereby permit anyone to distribute and use this code,
* in source code or binary form, with or without modifications. This
* permission is world-wide and irrevocable.
*
* Of course, I will not be liable for any errors or shortcomings in the
* code, since I give it away without asking any compenstations.
*
* If you use or distribute this code, I would appreciate receiving
* credit for writing it, in whichever way you find proper and customary.
*/
#include "xcftools.h"
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <errno.h>
const char *progname = "$0" ;
int verboseFlag = 0 ;
static void __ATTRIBUTE__((noreturn))
vFatalGeneric(int status,const char *format,va_list args)
{
if( format ) {
if( *format == '!' ) {
vfprintf(stderr,format+1,args);
fprintf(stderr,": %s\n",strerror(errno));
} else {
vfprintf(stderr,format,args);
fputc('\n',stderr);
}
}
exit(status);
}
void
FatalGeneric(int status,const char* format,...)
{
va_list v; va_start(v,format);
if( format ) fprintf(stderr,"%s: ",progname);
vFatalGeneric(status,format,v);
}
void
FatalUnexpected(const char* format,...)
{
va_list v; va_start(v,format);
fprintf(stderr,"%s: ",progname);
vFatalGeneric(127,format,v) ;
}
void
FatalBadXCF(const char* format,...)
{
va_list v; va_start(v,format);
fprintf(stderr,"%s: %s:\n ",progname,_("Corrupted or malformed XCF file"));
vFatalGeneric(125,format,v) ;
}
void
xcfCheckspace(uint32_t addr,int spaceafter,const char *format,...)
{
if( xcf_length < spaceafter || addr > xcf_length - spaceafter ) {
va_list v; va_start(v,format);
fprintf(stderr,"%s: %s\n ",progname,_("Corrupted or truncated XCF file"));
fprintf(stderr,"(0x%" PRIXPTR " bytes): ",(uintptr_t)xcf_length);
vFatalGeneric(125,format,v) ;
}
}
void
FatalUnsupportedXCF(const char* format,...)
{
va_list v; va_start(v,format);
fprintf(stderr,"%s: %s\n ",progname,
_("The image contains features not understood by this program:"));
vFatalGeneric(123,format,v) ;
}
void
gpl_blurb(void)
{
fprintf(stderr,PACKAGE_STRING "\n");
fprintf(stderr,
_("Type \"%s -h\" to get an option summary.\n"),progname);
exit(1) ;
}
/* ******************************************************* */
void *
xcfmalloc(size_t size)
{
void *ptr = malloc(size);
if( !ptr )
FatalUnexpected(_("Out of memory"));
return ptr ;
}
void
xcffree(void *block)
{
if( xcf_file &&
(uint8_t*)block >= xcf_file &&
(uint8_t*)block < xcf_file + xcf_length )
;
else
free(block);
}
/* ******************************************************* */
FILE *
openout(const char *name)
{
FILE *newfile ;
if( strcmp(name,"-") == 0 )
return stdout ;
newfile = fopen(name,"wb") ;
if( newfile == NULL )
FatalUnexpected(_("!Cannot create file %s"),name);
return newfile ;
}
void
closeout(FILE *f,const char *name)
{
if( f == NULL )
return ;
if( fflush(f) == 0 ) {
errno = 0 ;
if( !ferror(f) ) {
if( fclose(f) == 0 )
return ;
} else if( errno == 0 ) {
/* Attempt to coax a valid errno out of the standard library,
* following an idea by Bruno Haible
* http://lists.gnu.org/archive/html/bug-gnulib/2003-09/msg00157.html
*/
if( fputc('\0', f) != EOF &&
fflush(f) == 0 )
errno = EIO ; /* Argh, everything succeds. Just call it an I/O error */
}
}
FatalUnexpected(_("!Error writing file %s"),name);
}
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