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54 lines
1021 B
C
54 lines
1021 B
C
/*
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*
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* (c) 2005 Laurent Vivier <Laurent@lvivier.info>
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*
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*/
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#include <stdlib.h>
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#include "libblock.h"
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#include "block.h"
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#define NB_SECTORS (18*2)
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/*
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* path is "<first>,<size>"
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* where <first> is the offset of the first byte to read on the device
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* and <size> is the number of bytes to read then.
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*/
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stream_FILE *block_open(stream_VOLUME *volume, char *path)
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{
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block_FILE *block;
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int blocksize = ((device_io_t*)volume)->get_blocksize(((device_io_t*)volume)->data);
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int first, size;
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first = strtol(path, &path, 0);
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if ( (*path != ',') && (*path != 0) )
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return NULL;
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if (*path == ',')
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{
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path++;
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size = strtol(path, &path, 0);
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if (*path != 0)
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return NULL;
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}
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else
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size = -1;
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block = (block_FILE *)malloc(sizeof(block_FILE) +
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NB_SECTORS * blocksize);
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if (block == NULL)
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return NULL;
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block->base = first;
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block->offset = 0;
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block->size = size;
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block->device = (device_io_t*)volume;
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block->current = -1;
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block->buffer_size = NB_SECTORS;
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return (stream_FILE*)block;
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}
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