adamdunkels | a2f3c42 | 2004-09-12 20:24:53 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004, Swedish Institute of Computer Science. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. Neither the name of the Institute nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | * |
| 29 | * This file is part of the Contiki operating system. |
| 30 | * |
| 31 | * Author: Adam Dunkels <adam@sics.se> |
| 32 | * |
| 33 | * $Id: uipbuf.c,v 1.6 2004/09/12 20:24:56 adamdunkels Exp $ |
| 34 | */ |
adamdunkels | 5680786 | 2004-08-09 20:50:11 +0000 | [diff] [blame] | 35 | |
| 36 | #include "uipbuf.h" |
| 37 | |
| 38 | #include <string.h> |
| 39 | |
| 40 | /*---------------------------------------------------------------------------*/ |
| 41 | void |
| 42 | uipbuf_setup(struct uipbuf_buffer *buf, |
| 43 | u8_t *bufptr, u16_t bufsize) |
| 44 | { |
| 45 | buf->buffer = buf->ptr = bufptr; |
| 46 | buf->bufsize = buf->left = bufsize; |
| 47 | } |
| 48 | /*---------------------------------------------------------------------------*/ |
| 49 | u8_t |
| 50 | uipbuf_bufdata(struct uipbuf_buffer *buf, u16_t len, |
| 51 | u8_t **dataptr, u16_t *datalen) |
| 52 | { |
| 53 | if(*datalen < buf->left) { |
| 54 | memcpy(buf->ptr, *dataptr, *datalen); |
| 55 | buf->ptr += *datalen; |
| 56 | buf->left -= *datalen; |
| 57 | *dataptr += *datalen; |
| 58 | *datalen = 0; |
| 59 | return UIPBUF_NOT_FULL; |
| 60 | } else if(*datalen == buf->left) { |
| 61 | memcpy(buf->ptr, *dataptr, *datalen); |
| 62 | buf->ptr += *datalen; |
| 63 | buf->left = 0; |
| 64 | *dataptr += *datalen; |
| 65 | *datalen = 0; |
| 66 | return UIPBUF_FULL; |
| 67 | } else { |
| 68 | memcpy(buf->ptr, *dataptr, buf->left); |
| 69 | buf->ptr += buf->left; |
| 70 | *datalen -= buf->left; |
| 71 | *dataptr += buf->left; |
| 72 | buf->left = 0; |
| 73 | return UIPBUF_FULL; |
| 74 | } |
| 75 | |
| 76 | } |
| 77 | /*---------------------------------------------------------------------------*/ |
| 78 | u8_t |
adamdunkels | bce2a81 | 2004-09-03 10:00:40 +0000 | [diff] [blame] | 79 | uipbuf_bufto(register struct uipbuf_buffer *buf, u8_t endmarker, |
| 80 | register u8_t **dataptr, register u16_t *datalen) |
adamdunkels | 5680786 | 2004-08-09 20:50:11 +0000 | [diff] [blame] | 81 | { |
| 82 | u8_t c; |
adamdunkels | bce2a81 | 2004-09-03 10:00:40 +0000 | [diff] [blame] | 83 | /* |
| 84 | int len; |
| 85 | |
| 86 | ptr = memchr(*dataptr, endmarker, *datalen); |
| 87 | if(ptr != NULL) { |
| 88 | len = ptr - *dataptr; |
| 89 | } else { |
| 90 | len = *datalen; |
| 91 | } |
| 92 | memcpy(buf->ptr, *dataptr, len); |
| 93 | *dataptr += len; |
| 94 | *datalen -= len; |
| 95 | buf->ptr += len; |
| 96 | */ |
adamdunkels | 5680786 | 2004-08-09 20:50:11 +0000 | [diff] [blame] | 97 | while(buf->left > 0 && *datalen > 0) { |
| 98 | c = *buf->ptr = **dataptr; |
| 99 | ++*dataptr; |
| 100 | ++buf->ptr; |
| 101 | --*datalen; |
| 102 | --buf->left; |
| 103 | |
| 104 | if(c == endmarker) { |
| 105 | return UIPBUF_FOUND; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | if(*datalen == 0) { |
| 110 | return UIPBUF_NOT_FOUND; |
| 111 | } |
| 112 | |
| 113 | while(*datalen > 0) { |
adamdunkels | 5c22b92 | 2004-08-11 21:25:30 +0000 | [diff] [blame] | 114 | c = **dataptr; |
adamdunkels | 5680786 | 2004-08-09 20:50:11 +0000 | [diff] [blame] | 115 | --*datalen; |
| 116 | ++*dataptr; |
adamdunkels | 5c22b92 | 2004-08-11 21:25:30 +0000 | [diff] [blame] | 117 | |
| 118 | if(c == endmarker) { |
| 119 | return UIPBUF_FOUND | UIPBUF_FULL; |
| 120 | } |
adamdunkels | 5680786 | 2004-08-09 20:50:11 +0000 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | return UIPBUF_FULL; |
| 124 | } |
oliverschmidt | 4b4c289 | 2004-08-20 12:34:33 +0000 | [diff] [blame] | 125 | /*----------------------------------------------------------------------------*/ |
| 126 | u16_t |
adamdunkels | 5680786 | 2004-08-09 20:50:11 +0000 | [diff] [blame] | 127 | uipbuf_len(struct uipbuf_buffer *buf) |
| 128 | { |
| 129 | return buf->bufsize - buf->left; |
| 130 | } |
| 131 | /*----------------------------------------------------------------------------*/ |