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fixed check for remaining size on WOFS

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This commit is contained in:
Bogdan Marinescu 2012-06-26 00:57:55 +03:00
parent a9ebeac525
commit c2227a7645
1 changed files with 4 additions and 2 deletions
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6
src/romfs.c
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@ -280,8 +280,10 @@ static _ssize_t romfs_write_r( struct _reent *r, int fd, const void* ptr, size_t
if( pfd->offset != pfd->size ) if( pfd->offset != pfd->size )
return 0; return 0;
// Check if we have enough space left on the device. Always keep 1 byte for the final 0xFF // Check if we have enough space left on the device. Always keep 1 byte for the final 0xFF
if( pfd->baseaddr + pfd->size + len > pfsdata->max_size - 1 ) // and ROMFS_ALIGN - 1 bytes for aligning the contents of the file data in the worst case
len = pfsdata->max_size - ( pfd->baseaddr + pfd->size ) - 1; // scenario (so ROMFS_ALIGN bytes in total)
if( pfd->baseaddr + pfd->size + len > pfsdata->max_size - ROMFS_ALIGN )
len = pfsdata->max_size - ( pfd->baseaddr + pfd->size ) - ROMFS_ALIGN;
pfsdata->writef( ptr, pfd->offset + pfd->baseaddr, len, pfsdata ); pfsdata->writef( ptr, pfd->offset + pfd->baseaddr, len, pfsdata );
pfd->offset += len; pfd->offset += len;
pfd->size += len; pfd->size += len;