/* Given a filename, generate the names for the header and the image data.
*
* Eg.
* "fred" -> "fred.hdr", "fred.img"
* "fred.img" -> "fred.hdr", "fred.img"
*/
static void
generate_filenames( const char *path, char *header, char *image )
{
const char *olds[] = { ".img", ".hdr" };
vips__change_suffix( path, header, FILENAME_MAX, ".hdr", olds, 2 );
vips__change_suffix( path, image, FILENAME_MAX, ".img", olds, 2 );
}
/**
* vips_guess_prefix:
* @argv0: program name (typically argv[0])
* @env_name: save prefix in this environment variable
*
* vips_guess_prefix() tries to guess the install directory. You should pass
* in the value of argv[0] (the name your program was run as) as a clue to
* help it out, plus the name of the environment variable you let the user
* override your package install area with (eg. "VIPSHOME").
*
* On success, vips_guess_prefix() returns the prefix it discovered, and as a
* side effect, sets the environment variable (if it's not set).
*
* Don't free the return string!
*
* See also: vips_guess_libdir().
*
* Returns: (transfer none): the install prefix as a static string, do not free.
*/
const char *
vips_guess_prefix( const char *argv0, const char *env_name )
{
const char *prefix;
char *basename;
char name[VIPS_PATH_MAX];
/* Already set?
*/
if( (prefix = g_getenv( env_name )) ) {
#ifdef DEBUG
printf( "vips_guess_prefix: found \"%s\" in environment\n",
prefix );
#endif /*DEBUG*/
return( prefix );
}
/* Get the program name from argv0.
*/
basename = g_path_get_basename( argv0 );
/* Add the exe suffix, if it's missing.
*/
if( strlen( VIPS_EXEEXT ) > 0 ) {
const char *olds[] = { VIPS_EXEEXT };
vips__change_suffix( basename, name,
VIPS_PATH_MAX, VIPS_EXEEXT, olds, 1 );
}
else
vips_strncpy( name, basename, VIPS_PATH_MAX );
g_free( basename );
#ifdef DEBUG
printf( "vips_guess_prefix: argv0 = %s\n", argv0 );
printf( "vips_guess_prefix: name = %s\n", name );
#endif /*DEBUG*/
prefix = guess_prefix( argv0, name );
g_setenv( env_name, prefix, TRUE );
return( prefix );
}
