libcrypto/bio/bss_mem.c

76 bio_mem_pending(struct bio_mem *bm)
78 	if (bm->read_offset > bm->buf->length)
81 	return bm->buf->length - bm->read_offset;
85 bio_mem_read_ptr(struct bio_mem *bm)
87 	return &bm->buf->data[bm->read_offset];
125 	struct bio_mem *bm;
142 	bm = bio->ptr;
143 	bm->buf->data = (void *)buf; /* Trust in the BIO_FLAGS_MEM_RDONLY flag. */
144 	bm->buf->length = buf_len;
145 	bm->buf->max = buf_len;
157 	struct bio_mem *bm;
159 	if ((bm = calloc(1, sizeof(*bm))) == NULL)
161 	if ((bm->buf = BUF_MEM_new()) == NULL) {
162 		free(bm);
169 	bio->ptr = bm;
177 	struct bio_mem *bm;
184 	bm = bio->ptr;
187 			bm->buf->data = NULL;
188 		BUF_MEM_free(bm->buf);
190 	free(bm);
199 	struct bio_mem *bm = bio->ptr;
206 	if ((size_t)out_len > bio_mem_pending(bm))
207 		out_len = bio_mem_pending(bm);
215 	memcpy(out, bio_mem_read_ptr(bm), out_len);
216 	bm->read_offset += out_len;
224 	struct bio_mem *bm = bio->ptr;
237 	if (bm->read_offset > 4096) {
238 		memmove(bm->buf->data, bio_mem_read_ptr(bm),
239 		    bio_mem_pending(bm));
240 		bm->buf->length = bio_mem_pending(bm);
241 		bm->read_offset = 0;
248 	buf_len = bm->buf->length + in_len;
249 	if (buf_len < bm->buf->length || buf_len > INT_MAX)
252 	if (BUF_MEM_grow_clean(bm->buf, buf_len) != buf_len)
255 	memcpy(&bm->buf->data[buf_len - in_len], in, in_len);
263 	struct bio_mem *bm = bio->ptr;
269 		if (bm->buf->data != NULL) {
271 				memset(bm->buf->data, 0, bm->buf->max);
272 				bm->buf->length = 0;
274 			bm->read_offset = 0;
278 		ret = (long)(bio_mem_pending(bm) == 0);
286 			*pptr = bio_mem_read_ptr(bm);
288 		ret = (long)bio_mem_pending(bm);
291 		BUF_MEM_free(bm->buf);
293 		bm->buf = ptr;
294 		bm->read_offset = 0;
299 			*pptr = bm->buf;
312 		ret = (long)bio_mem_pending(bm);
330 	struct bio_mem *bm = bio->ptr;
337 	out_max = bio_mem_pending(bm);
345 	p = bio_mem_read_ptr(bm);