refactoring: only function prototypes belong in header files

[smdp.git] / cstring.c

diff --git a/cstring.c b/cstring.c
new file mode 100644 (file)
index 0000000..e7308ef
--- /dev/null
+++ b/cstring.c
@@ -0,0 +1,46 @@
+#include <string.h> // strlen
+#include <stdlib.h> // malloc, realloc
+
+#include "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;
+    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);
+    }
+    self->text[self->size] = x;
+    self->text[self->size+1] = '\0';
+    self->size = strlen(self->text);
+}
+
+void cstring_expand_arr(cstring_t *self, char *x) {
+    if(self->size + strlen(x) + sizeof(char) > self->alloc) {
+        self->alloc += (REALLOC_ADD * sizeof(char));
+        self->text = realloc(self->text, self->alloc);
+    }
+    self->text = strcat(self->text, x);
+    self->size = strlen(self->text);
+}
+
+void cstring_reset(cstring_t *self) {
+    free(self->text);
+    self->text = (void*)0;
+    self->size = self->alloc = 0;
+}
+
+void cstring_delete(cstring_t *self) {
+    free(self->text);
+    free(self);
+}
+