#include "buffer.h"
#include <string.h>
#include <stdlib.h>
void buffer_init(buffer* b) {
*b = (buffer) {
.sz = 0,
.run = 256,
};
b -> ptr = malloc(b -> run);
}
buffer buffer_mk() { buffer b; buffer_init(&b); return b; }
void buffer_push(buffer* b, strp const data) {
size_t run = b->run;
while (b -> sz + data.sz > run) run *= 2;
if (run != b->run) {
b->ptr = realloc(b->ptr, run);
b->run = run;
}
memcpy(&b->ptr[b->sz], data.ptr, data.sz);
b->sz += data.sz;
}
strp buffer_crush(buffer* b, size_t max) {
if (b->run>max) {
b->run = max;
if (b->sz > max) {
free(b->ptr);
b->sz = 0;
b->ptr = malloc(b->run);
} else {
b->ptr = realloc(b->ptr, b->run);
}
}
return (strp){b->sz, b->ptr};
}
size_t buffer_pushs(buffer* b, char const* data) {
size_t len = strlen(data);
buffer_push(b, (strp){len, .cptr = data});
return len;
}
void buffer_clear(buffer* b) {
b -> sz = 0;
}