bool buffer_search_replace( buffer_type * buffer , const char * old_string , const char * new_string) {
const int shift = strlen( new_string ) - strlen( old_string );
bool match = buffer_strstr( buffer , old_string );
if (match) {
size_t offset = buffer_get_offset( buffer ) + strlen( old_string );
if (shift != 0)
buffer_memshift( buffer , offset , shift );
/** Search continues at the end of the newly inserted string - i.e. no room for recursions. */
buffer_fwrite( buffer , new_string , strlen( new_string ) , sizeof * new_string );
}
return match;
}
bool buffer_search_replace( buffer_type * buffer , const char * old_string , const char * new_string) {
bool match = buffer_strstr( buffer , old_string );
if (match) {
size_t offset = buffer_get_offset( buffer ) + strlen( old_string );
const int shift = strlen( new_string ) - strlen( old_string );
if (shift != 0)
buffer_memshift( buffer , offset , shift );
buffer_fwrite( buffer , new_string , 1 , strlen(new_string));
buffer_terminate_char_ptr( buffer );
}
return match;
}
static void subst_list_eval_funcs____(const subst_list_type * subst_list , const parser_type * parser , buffer_type * buffer) {
{
int index;
for (index = 0; index < vector_get_size( subst_list->func_data); index++) {
const subst_list_func_type * subst_func = vector_iget_const( subst_list->func_data , index );
const char * func_name = subst_func->name;
bool match;
buffer_rewind( buffer );
do {
size_t match_pos;
match = buffer_strstr( buffer , func_name );
match_pos = buffer_get_offset( buffer );
if (match) {
bool update = false;
char * arg_start = buffer_get_data( buffer );
arg_start += buffer_get_offset( buffer ) + strlen( func_name );
if (arg_start[0] == '(') { /* We require that an opening paren follows immediately behind the function name. */
char * arg_end = strchr( arg_start , ')');
if (arg_end != NULL) {
/* OK - we found an enclosing () pair. */
char * arg_content = util_alloc_substring_copy( arg_start, 1 , arg_end - arg_start - 1);
stringlist_type * arg_list = parser_tokenize_buffer( parser , arg_content , true);
char * func_eval = subst_list_func_eval( subst_func , arg_list );
int old_len = strlen(func_name) + strlen( arg_content) + 2;
if (func_eval != NULL) {
buffer_memshift( buffer , match_pos + old_len , strlen( func_eval ) - old_len);
buffer_fwrite( buffer , func_eval , strlen( func_eval ) , sizeof * func_eval );
free( func_eval );
update = true;
}
free( arg_content );
stringlist_free( arg_list );
}
}
if (!update)
buffer_fseek( buffer , match_pos + strlen( func_name ) , SEEK_SET);
}
} while (match);
}
}
if (subst_list->parent != NULL)
subst_list_eval_funcs____( subst_list->parent , parser , buffer );
}
