| adamdunkels | 5680786 | 2004-08-09 20:50:11 +0000 | [diff] [blame^] | 1 | |
| 2 | #include "uipbuf.h" |
| 3 | |
| 4 | #include <string.h> |
| 5 | |
| 6 | /*---------------------------------------------------------------------------*/ |
| 7 | void |
| 8 | uipbuf_setup(struct uipbuf_buffer *buf, |
| 9 | u8_t *bufptr, u16_t bufsize) |
| 10 | { |
| 11 | buf->buffer = buf->ptr = bufptr; |
| 12 | buf->bufsize = buf->left = bufsize; |
| 13 | } |
| 14 | /*---------------------------------------------------------------------------*/ |
| 15 | u8_t |
| 16 | uipbuf_bufdata(struct uipbuf_buffer *buf, u16_t len, |
| 17 | u8_t **dataptr, u16_t *datalen) |
| 18 | { |
| 19 | if(*datalen < buf->left) { |
| 20 | memcpy(buf->ptr, *dataptr, *datalen); |
| 21 | buf->ptr += *datalen; |
| 22 | buf->left -= *datalen; |
| 23 | *dataptr += *datalen; |
| 24 | *datalen = 0; |
| 25 | return UIPBUF_NOT_FULL; |
| 26 | } else if(*datalen == buf->left) { |
| 27 | memcpy(buf->ptr, *dataptr, *datalen); |
| 28 | buf->ptr += *datalen; |
| 29 | buf->left = 0; |
| 30 | *dataptr += *datalen; |
| 31 | *datalen = 0; |
| 32 | return UIPBUF_FULL; |
| 33 | } else { |
| 34 | memcpy(buf->ptr, *dataptr, buf->left); |
| 35 | buf->ptr += buf->left; |
| 36 | *datalen -= buf->left; |
| 37 | *dataptr += buf->left; |
| 38 | buf->left = 0; |
| 39 | return UIPBUF_FULL; |
| 40 | } |
| 41 | |
| 42 | } |
| 43 | /*---------------------------------------------------------------------------*/ |
| 44 | u8_t |
| 45 | uipbuf_bufdata_endmarker(struct uipbuf_buffer *buf, u8_t endmarker, |
| 46 | u8_t **dataptr, u16_t *datalen) |
| 47 | { |
| 48 | u8_t c; |
| 49 | |
| 50 | while(buf->left > 0 && *datalen > 0) { |
| 51 | c = *buf->ptr = **dataptr; |
| 52 | ++*dataptr; |
| 53 | ++buf->ptr; |
| 54 | --*datalen; |
| 55 | --buf->left; |
| 56 | |
| 57 | if(c == endmarker) { |
| 58 | return UIPBUF_FOUND; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | if(*datalen == 0) { |
| 63 | return UIPBUF_NOT_FOUND; |
| 64 | } |
| 65 | |
| 66 | while(*datalen > 0) { |
| 67 | if(**dataptr == endmarker) { |
| 68 | return UIPBUF_FOUND | UIPBUF_FULL; |
| 69 | } |
| 70 | --*datalen; |
| 71 | ++*dataptr; |
| 72 | } |
| 73 | |
| 74 | return UIPBUF_FULL; |
| 75 | } |
| 76 | /*----------------------------------------------------------------------------*/u16_t |
| 77 | uipbuf_len(struct uipbuf_buffer *buf) |
| 78 | { |
| 79 | return buf->bufsize - buf->left; |
| 80 | } |
| 81 | /*----------------------------------------------------------------------------*/ |