Mercurial > hg > ucx / file diff

     1.1 --- a/ucx/memstream.c	Wed Oct 10 09:34:13 2012 +0200
     1.2 +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.3 @@ -1,118 +0,0 @@
     1.4 -#include "memstream.h"
     1.5 -#include <stdarg.h>
     1.6 -#include <stdlib.h>
     1.7 -#include <string.h>
     1.8 -
     1.9 -struct UcxMemstream {
    1.10 -    void *space;
    1.11 -    off_t pos;
    1.12 -    size_t length;
    1.13 -    _Bool autofree;
    1.14 -};
    1.15 -
    1.16 -UcxMemstream *ucx_memopen(void *space, size_t length) {
    1.17 -    UcxMemstream *stream = (UcxMemstream*) malloc(sizeof(UcxMemstream));
    1.18 -    if (stream) {
    1.19 -        if (!space) {
    1.20 -            stream->space = malloc(length);
    1.21 -            if (!stream->space) {
    1.22 -                free(stream);
    1.23 -                return NULL;
    1.24 -            }
    1.25 -            memset(stream->space, 0, length);
    1.26 -            stream->autofree = 1;
    1.27 -        } else {
    1.28 -            stream->space = space;
    1.29 -            stream->autofree = 0;
    1.30 -        }
    1.31 -        stream->length = length;
    1.32 -
    1.33 -        stream->pos = 0;
    1.34 -    }
    1.35 -
    1.36 -    return stream;
    1.37 -}
    1.38 -
    1.39 -void ucx_memclose(UcxMemstream *stream) {
    1.40 -    if (stream->autofree) {
    1.41 -        free(stream->space);
    1.42 -    }
    1.43 -    free(stream);
    1.44 -}
    1.45 -
    1.46 -int ucx_memseek(UcxMemstream *stream, off_t offset, int whence) {
    1.47 -    off_t npos;
    1.48 -    switch (whence) {
    1.49 -    case SEEK_SET:
    1.50 -        npos = 0;
    1.51 -        break;
    1.52 -    case SEEK_CUR:
    1.53 -        npos = stream->pos;
    1.54 -        break;
    1.55 -    case SEEK_END:
    1.56 -        npos = strlen(stream->space);
    1.57 -        break;
    1.58 -    }
    1.59 -
    1.60 -    npos += offset;
    1.61 -
    1.62 -    if (npos < 0 || npos > stream->length) {
    1.63 -        return -1;
    1.64 -    } else {
    1.65 -        stream->pos = npos;
    1.66 -        return 0;
    1.67 -    }
    1.68 -
    1.69 -}
    1.70 -
    1.71 -int ucx_memeof(UcxMemstream *stream) {
    1.72 -    return stream->pos >= stream->length;
    1.73 -}
    1.74 -
    1.75 -size_t ucx_memtell(UcxMemstream *stream) {
    1.76 -    return stream->pos;
    1.77 -}
    1.78 -
    1.79 -size_t ucx_memio(void* d, size_t s, size_t n, UcxMemstream *m, _Bool read) {
    1.80 -    size_t len;
    1.81 -    if (m->pos + s*n > m->length) {
    1.82 -        len = m->length - m->pos;
    1.83 -        if (s > 1) len -= len%s;
    1.84 -    } else {
    1.85 -        len = s*n;
    1.86 -    }
    1.87 -
    1.88 -    if (len == 0) {
    1.89 -        return 0;
    1.90 -    }
    1.91 -
    1.92 -    if (read) {
    1.93 -        memcpy(d, (char*)m->space+m->pos, len);
    1.94 -    } else {
    1.95 -        memcpy((char*)m->space+m->pos, d, len);
    1.96 -    }
    1.97 -    m->pos += len;
    1.98 -
    1.99 -    return len;
   1.100 -}
   1.101 -
   1.102 -int ucx_memputc(UcxMemstream *stream, int c) {
   1.103 -    if (ucx_memeof(stream)) {
   1.104 -        return EOF;
   1.105 -    } else {
   1.106 -        c &= 0xFF;
   1.107 -        ((char*)(stream->space))[stream->pos] = (char) c;
   1.108 -        stream->pos++;
   1.109 -        return c;
   1.110 -    }
   1.111 -}
   1.112 -
   1.113 -int ucx_memgetc(UcxMemstream *stream) {
   1.114 -    if (ucx_memeof(stream)) {
   1.115 -        return EOF;
   1.116 -    } else {
   1.117 -        int c = ((char*)(stream->space))[stream->pos];
   1.118 -        stream->pos++;
   1.119 -        return c;
   1.120 -    }
   1.121 -}