comparison: src/server/util/writer.c
src/server/util/writer.c
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- changeset 211
- 2160585200ac
- child 232
- 499711b2a970
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| 210:21274e5950af | 211:2160585200ac |
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2018 Olaf Wintermann. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include <stdio.h> | |
| 30 #include <stdlib.h> | |
| 31 #include <string.h> | |
| 32 | |
| 33 #include "writer.h" | |
| 34 | |
| 35 void writer_init(Writer *w, SYS_NETFD fd, char *buf, size_t len) { | |
| 36 w->fd = fd; | |
| 37 w->buffer = buf; | |
| 38 w->size = len; | |
| 39 w->pos = 0; | |
| 40 w->error = 0; | |
| 41 } | |
| 42 | |
| 43 int writer_flush(Writer *w) { | |
| 44 if(w->error) { | |
| 45 return w->error; | |
| 46 } | |
| 47 | |
| 48 size_t pos = 0; | |
| 49 size_t len = w->pos; | |
| 50 | |
| 51 while(len > 0) { | |
| 52 ssize_t r = net_write(w->fd, w->buffer + pos, len); | |
| 53 if(r <= 0) { | |
| 54 break; | |
| 55 } | |
| 56 len -= r; | |
| 57 pos += r; | |
| 58 } | |
| 59 | |
| 60 if(pos != w->pos) { | |
| 61 w->error = 1; | |
| 62 return 1; | |
| 63 } | |
| 64 | |
| 65 w->pos = 0; | |
| 66 return 0; | |
| 67 } | |
| 68 | |
| 69 int writer_put(Writer *w, const char *s, size_t len) { | |
| 70 if(w->error) { | |
| 71 return w->error; | |
| 72 } | |
| 73 | |
| 74 size_t a = w->size - w->pos; | |
| 75 if(a == 0) { | |
| 76 if(writer_flush(w)) { | |
| 77 return 1; | |
| 78 } | |
| 79 } | |
| 80 | |
| 81 size_t cplen = len > a ? a : len; | |
| 82 memcpy(w->buffer, s, cplen); | |
| 83 w->pos += cplen; | |
| 84 | |
| 85 if(cplen < len) { | |
| 86 return writer_put(w, s + cplen, len - cplen); | |
| 87 } else { | |
| 88 return 0; | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 int writer_puts(Writer *w, sstr_t s) { | |
| 93 return writer_put(w, s.ptr, s.length); | |
| 94 } | |
| 95 | |
| 96 int writer_putc(Writer *w, char c) { | |
| 97 if(w->pos == w->size) { | |
| 98 if(writer_flush(w)) { | |
| 99 return 1; | |
| 100 } | |
| 101 } | |
| 102 w->buffer[w->pos++] = c; | |
| 103 return 0; | |
| 104 } |
