| 1 | #include <stdio.h> |
| 2 | #include <string.h> |
| 3 | #include <stdlib.h> |
| 4 | |
| 5 | #include "output_buffer.h" |
| 6 | #include "../log.h" |
| 7 | #include "../minmax.h" |
| 8 | |
| 9 | #define BUF_INC 1024 |
| 10 | |
| 11 | void buf_output_init(struct buf_output *out) |
| 12 | { |
| 13 | out->max_buflen = 0; |
| 14 | out->buflen = 0; |
| 15 | out->buf = NULL; |
| 16 | } |
| 17 | |
| 18 | void buf_output_free(struct buf_output *out) |
| 19 | { |
| 20 | free(out->buf); |
| 21 | } |
| 22 | |
| 23 | size_t buf_output_add(struct buf_output *out, const char *buf, size_t len) |
| 24 | { |
| 25 | if (out->max_buflen - out->buflen < len) { |
| 26 | size_t need = len - (out->max_buflen - out->buflen); |
| 27 | size_t old_max = out->max_buflen; |
| 28 | |
| 29 | need = max((size_t) BUF_INC, need); |
| 30 | out->max_buflen += need; |
| 31 | out->buf = realloc(out->buf, out->max_buflen); |
| 32 | |
| 33 | old_max = max(old_max, out->buflen + len); |
| 34 | if (old_max + need > out->max_buflen) |
| 35 | need = out->max_buflen - old_max; |
| 36 | memset(&out->buf[old_max], 0, need); |
| 37 | } |
| 38 | |
| 39 | memcpy(&out->buf[out->buflen], buf, len); |
| 40 | out->buflen += len; |
| 41 | return len; |
| 42 | } |
| 43 | |
| 44 | size_t buf_output_flush(struct buf_output *out) |
| 45 | { |
| 46 | size_t ret = 0; |
| 47 | |
| 48 | if (out->buflen) { |
| 49 | ret = log_info_buf(out->buf, out->buflen); |
| 50 | memset(out->buf, 0, out->max_buflen); |
| 51 | out->buflen = 0; |
| 52 | } |
| 53 | |
| 54 | return ret; |
| 55 | } |