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/*
* upb - a minimalist implementation of protocol buffers.
*
* Copyright (c) 2010 Google Inc. See LICENSE for details.
* Author: Josh Haberman <jhaberman@gmail.com>
*/
#include "upb_strstream.h"
#include <stdlib.h>
/* upb_stringsrc **************************************************************/
size_t upb_stringsrc_fetch(void *_src, uint64_t ofs, upb_status *s) {
upb_stringsrc *src = _src;
size_t bytes = src->len - ofs;
if (bytes == 0) s->code = UPB_EOF;
return bytes;
}
void upb_stringsrc_read(void *_src, uint64_t src_ofs, size_t len, char *dst) {
upb_stringsrc *src = _src;
memcpy(dst, src->str + src_ofs, len);
}
const char *upb_stringsrc_getptr(void *_src, uint64_t ofs, size_t *len) {
upb_stringsrc *src = _src;
*len = src->len - ofs;
return src->str + ofs;
}
void upb_stringsrc_init(upb_stringsrc *s) {
static upb_bytesrc_vtbl vtbl = {
&upb_stringsrc_fetch,
&upb_stringsrc_read,
&upb_stringsrc_getptr,
NULL, NULL, NULL, NULL
};
upb_bytesrc_init(&s->bytesrc, &vtbl);
s->str = NULL;
}
void upb_stringsrc_reset(upb_stringsrc *s, const char *str, size_t len) {
s->str = str;
s->len = len;
}
void upb_stringsrc_uninit(upb_stringsrc *s) { (void)s; }
upb_bytesrc *upb_stringsrc_bytesrc(upb_stringsrc *s) {
return &s->bytesrc;
}
/* upb_stringsink *************************************************************/
void upb_stringsink_uninit(upb_stringsink *s) {
free(s->str);
}
// Resets the stringsink to a state where it will append to the given string.
// The string must be newly created or recycled. The stringsink will take a
// reference on the string, so the caller need not ensure that it outlives the
// stringsink. A stringsink can be reset multiple times.
void upb_stringsink_reset(upb_stringsink *s, char *str, size_t size) {
free(s->str);
s->str = str;
s->len = 0;
s->size = size;
}
upb_bytesink *upb_stringsink_bytesink(upb_stringsink *s) {
return &s->bytesink;
}
static int32_t upb_stringsink_vprintf(void *_s, upb_status *status,
const char *fmt, va_list args) {
(void)status; // TODO: report realloc() errors.
upb_stringsink *s = _s;
int ret = upb_vrprintf(&s->str, &s->size, s->len, fmt, args);
if (ret >= 0) s->len += ret;
return ret;
}
bool upb_stringsink_write(void *_s, const char *buf, size_t len,
upb_status *status) {
(void)status; // TODO: report realloc() errors.
upb_stringsink *s = _s;
if (s->len + len > s->size) {
while(s->len + len > s->size) s->size *= 2;
s->str = realloc(s->str, s->size);
}
memcpy(s->str + s->len, buf, len);
s->len += len;
return true;
}
void upb_stringsink_init(upb_stringsink *s) {
static upb_bytesink_vtbl vtbl = {
upb_stringsink_write,
upb_stringsink_vprintf
};
upb_bytesink_init(&s->bytesink, &vtbl);
s->str = NULL;
}
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