// Replace data between marks
int mark_replace_between_mark(mark_t* self, mark_t* other, char* data, bint_t data_len) {
bint_t offset_a;
bint_t offset_b;
buffer_get_offset(self->bline->buffer, self->bline, self->col, &offset_a);
buffer_get_offset(other->bline->buffer, other->bline, other->col, &offset_b);
if (offset_a < offset_b) {
return buffer_replace(self->bline->buffer, offset_a, offset_b - offset_a, data, data_len);
}
return buffer_replace(self->bline->buffer, offset_b, offset_a - offset_b, data, data_len);
}
// Delete data between self and other
int mark_delete_between_mark(mark_t* self, mark_t* other) {
bint_t offset_a;
bint_t offset_b;
buffer_get_offset(self->bline->buffer, self->bline, self->col, &offset_a);
buffer_get_offset(other->bline->buffer, other->bline, other->col, &offset_b);
if (offset_a == offset_b) {
return MLBUF_OK;
} else if (offset_a > offset_b) {
return buffer_delete(self->bline->buffer, offset_b, offset_a - offset_b);
}
return buffer_delete(self->bline->buffer, offset_a, offset_b - offset_a);
}
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 );
}
char * util_alloc_envvar( const char * value ) {
if (value == NULL)
return NULL;
else {
buffer_type * buffer = buffer_alloc( 1024 ); /* Start by filling up a buffer instance with
the current content of @value. */
buffer_fwrite_char_ptr( buffer , value );
buffer_fwrite_char( buffer , '\0' );
buffer_rewind( buffer );
while (true) {
if (buffer_strchr( buffer , '$')) {
const char * data = buffer_get_data( buffer );
int offset = buffer_get_offset( buffer ) + 1; /* Points at the first character following the '$' */
int var_length = 0;
/* Find the length of the variable name */
while (true) {
char c;
c = data[offset + var_length];
if (!(isalnum( c ) || c == '_')) /* Any character which is NOT in the set [a-Z,0-9_] marks the end of the variable. */
break;
if (c == '\0') /* The end of the string. */
break;
var_length += 1;
}
{
char * var_name = util_alloc_substring_copy( data , offset - 1 , var_length + 1); /* Include the leading $ */
const char * var_value = getenv( &var_name[1] );
if (var_value != NULL)
buffer_search_replace( buffer , var_name , var_value); /* The actual string replacement. */
else
buffer_fseek( buffer , var_length , SEEK_CUR ); /* The variable is not defined, and we leave the $name. */
free( var_name );
}
} else break; /* No more $ to replace */
}
buffer_shrink_to_fit( buffer );
{
char * expanded_value = buffer_get_data( buffer );
buffer_free_container( buffer );
return expanded_value;
}
}
}
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;
}
// Move mark by a character delta
int mark_move_by(mark_t* self, bint_t char_delta) {
bint_t offset;
buffer_get_offset(self->bline->buffer, self->bline, self->col, &offset);
return mark_move_offset(self, offset + char_delta);
}
// Get mark offset
int mark_get_offset(mark_t* self, bint_t* ret_offset) {
return buffer_get_offset(self->bline->buffer, self->bline, self->col, ret_offset);
}