*
*/
-#include <string.h> // strlen
+#include <string.h> // strlen, memmove
+#include <stdio.h> // fprintf
#include <stdlib.h> // malloc, realloc
#include "cstring.h"
cstring_t *cstring_init() {
- cstring_t *x = malloc(sizeof(cstring_t));
- x->text = (void*)0;
- x->size = x->alloc = 0;
- x->expand = cstring_expand;
- x->expand_arr = cstring_expand_arr;
- x->reset = cstring_reset;
- x->delete = cstring_delete;
+ cstring_t *x = NULL;
+ if((x = malloc(sizeof(cstring_t))) != NULL) {
+ x->text = NULL;
+ x->size = x->alloc = 0;
+ x->expand = cstring_expand;
+ x->expand_arr = cstring_expand_arr;
+ x->strip = cstring_strip;
+ x->reset = cstring_reset;
+ x->delete = cstring_delete;
+ } else {
+ fprintf(stderr, "%s\n", "cstring_init() failed to allocate memory.");
+ exit(EXIT_FAILURE);
+ }
return x;
}
void cstring_expand(cstring_t *self, char x) {
if(self->size + sizeof(x) + sizeof(char) > self->alloc) {
self->alloc += (REALLOC_ADD * sizeof(char));
- self->text = realloc(self->text, self->alloc);
+ if((self->text = realloc(self->text, self->alloc)) == NULL) {
+ fprintf(stderr, "%s\n", "cstring_expand() failed to reallocate memory.");
+ exit(EXIT_FAILURE);
+ }
}
self->text[self->size] = x;
self->text[self->size+1] = '\0';
void cstring_expand_arr(cstring_t *self, char *x) {
if(self->size + strlen(x) + sizeof(char) > self->alloc) {
self->alloc = ((strlen(x) + self->size + 1) * sizeof(char));
- self->text = realloc(self->text, self->alloc);
+ if((self->text = realloc(self->text, self->alloc)) == NULL) {
+ fprintf(stderr, "%s\n", "cstring_expand() failed to reallocate memory.");
+ exit(EXIT_FAILURE);
+ }
}
self->text = strcat(self->text, x);
self->size = strlen(self->text);
self->text[self->size+1] = '\0';
}
+void cstring_strip(cstring_t *self, int pos, int len) {
+ if(pos + len >= self->size) {
+ if(pos <= self->size) {
+ self->text[pos] = '\0';
+ self->size = pos;
+ }
+ return;
+ }
+ memmove(&self->text[pos], &self->text[pos+len], self->size - pos - len+1);
+ self->size -= len;
+}
+
void cstring_reset(cstring_t *self) {
free(self->text);
- self->text = (void*)0;
+ self->text = NULL;
self->size = self->alloc = 0;
}
free(self->text);
free(self);
}
-