108 lines
1.3 KiB
C
108 lines
1.3 KiB
C
#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include "abuf.h"
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#include "core.h"
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static void
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abuf_grow(abuf *buf, size_t delta)
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{
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if (buf->cap - buf->size < delta) {
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ab_resize(buf, buf->cap + delta);
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}
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}
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void
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ab_init(abuf *buf)
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{
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assert(buf != NULL);
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buf->b = NULL;
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buf->size = buf->cap = 0;
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}
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void
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ab_init_cap(abuf *buf, const size_t cap)
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{
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ab_init(buf);
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if (cap > 0) {
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ab_resize(buf, cap);
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}
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}
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void
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ab_resize(abuf *buf, size_t cap)
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{
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char *newbuf = NULL;
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cap = cap_growth(buf->cap, cap) + 1;
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newbuf = realloc(buf->b, cap);
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assert(newbuf != NULL);
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buf->cap = cap;
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buf->b = newbuf;
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}
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void
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ab_appendch(abuf *buf, char c)
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{
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abuf_grow(buf, 1);
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ab_append(buf, &c, 1);
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}
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void
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ab_append(abuf *buf, const char *s, size_t len)
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{
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char *nc = NULL;
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abuf_grow(buf, len);
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nc = buf->b;
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memcpy(&nc[buf->size], s, len);
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buf->b = nc;
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buf->size += len;
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}
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void
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ab_prependch(abuf *buf, const char c)
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{
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abuf_grow(buf, 1);
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ab_prepend(buf, &c, 1);
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}
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void
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ab_prepend(abuf *buf, const char *s, const size_t len)
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{
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char *nc = NULL;
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abuf_grow(buf, len);
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nc = buf->b;
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assert(nc != NULL);
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memmove(nc + len, nc, buf->size);
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memcpy(nc, s, len);
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buf->b = nc;
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buf->size += len;
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}
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void
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ab_free(abuf *buf)
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{
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free(buf->b);
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buf->b = NULL;
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buf->size = 0;
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buf->cap = 0;
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}
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