78 lines
1004 B
C
78 lines
1004 B
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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void
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abuf_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_appendch(abuf *buf, char c)
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{
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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 = buf->b;
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size_t sz = buf->size + len;
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if (sz >= buf->cap) {
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while (sz > buf->cap) {
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if (buf->cap == 0) {
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buf->cap = 1;
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} else {
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buf->cap *= 2;
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}
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}
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nc = realloc(nc, buf->cap);
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assert(nc != NULL);
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}
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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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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 = realloc(buf->b, buf->size + len);
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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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