/**
This function writes a filtered version of string to a file.
*/
void subst_list_filtered_fprintf(const subst_list_type * subst_list , const char * string , FILE * stream) {
buffer_type * buffer = buffer_alloc( strlen(string) + 1 );
buffer_fwrite( buffer , string , 1 , strlen( string ) + 1);
subst_list_update_buffer(subst_list , buffer);
buffer_stream_fwrite_n( buffer , 0 , -1 , stream ); /* -1: The trailing \0 is not explicitly written to file. */
buffer_free(buffer);
}
void subst_list_filter_file(const subst_list_type * subst_list , const char * src_file , const char * target_file) {
char * backup_file = NULL;
buffer_type * buffer = buffer_fread_alloc( src_file );
buffer_fseek( buffer , 0 , SEEK_END ); /* Ensure that the buffer is a \0 terminated string. */
buffer_fwrite_char( buffer , '\0');
/*****************************************************************/
/* Backup file ?? */
if (util_same_file(src_file , target_file)) {
char * backup_prefix = util_alloc_sprintf("%s-%s" , src_file , __func__);
backup_file = util_alloc_tmp_file("/tmp" , backup_prefix , false);
free(backup_prefix);
}
/* Writing backup file */
if (backup_file != NULL) {
FILE * stream = util_fopen(backup_file , "w");
buffer_stream_fwrite_n( buffer , 0 , -1 , stream ); /* -1: Do not write the trailing \0. */
fclose(stream);
}
/* Doing the actual update */
subst_list_update_buffer(subst_list , buffer);
/* Writing updated file */
{
FILE * stream = util_mkdir_fopen(target_file , "w");
buffer_stream_fwrite_n( buffer , 0 , -1 , stream ); /* -1: Do not write the trailing \0. */
fclose(stream);
}
/* OK - all went hunka dory - unlink the backup file and leave the building. */
if (backup_file != NULL) {
remove( backup_file );
free( backup_file );
}
free(buffer);
}
void buffer_stream_fwrite( const buffer_type * buffer , FILE * stream ) {
buffer_stream_fwrite_n( buffer , 0 , buffer->content_size , stream );
}