49 lines
852 B
C
Executable file
49 lines
852 B
C
Executable file
/*
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* Force I/O to be done to complete transfer length
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*
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* written by:
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*
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* Alain L. Knaff
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* alain@linux.lu
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*
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*/
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#include "sysincludes.h"
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#include "msdos.h"
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#include "stream.h"
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static int force_io(Stream_t *Stream,
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char *buf, mt_off_t start, size_t len,
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int (*io)(Stream_t *, char *, mt_off_t, size_t))
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{
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int ret;
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int done=0;
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while(len){
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ret = io(Stream, buf, start, len);
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if ( ret <= 0 ){
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if (done)
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return done;
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else
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return ret;
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}
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start += ret;
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done += ret;
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len -= ret;
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buf += ret;
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}
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return done;
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}
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int force_write(Stream_t *Stream, char *buf, mt_off_t start, size_t len)
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{
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return force_io(Stream, buf, start, len,
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Stream->Class->write);
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}
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int force_read(Stream_t *Stream, char *buf, mt_off_t start, size_t len)
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{
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return force_io(Stream, buf, start, len,
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Stream->Class->read);
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}
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