forked from KolibriOS/kolibrios
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
#include <stdio.h>
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#include <kolibrisys.h>
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// dont support return partial writing when fail
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// only 32-bit filesize
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int fwrite(void *buffer,int size,int count,FILE* file)
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{
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dword res;
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dword fullsize;
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if(!file || !buffer)
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{
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errno = E_INVALIDPTR;
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return EOF;
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}
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if ((file->mode & 3)==FILE_OPEN_READ)
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{
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errno = E_ACCESS;
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return 0;
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}
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if ((file->mode &3)==FILE_OPEN_APPEND)
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file->filepos=file->filesize;
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fullsize=count*size;
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if ((file->filesize)<(file->filepos+fullsize)) file->filesize=file->filepos+fullsize;
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/*
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if (file->mode==FILE_OPEN_APPEND)
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{
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file->filepos==file->filesize;
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res=_ksys_appendtofile(file->filename,file->filepos,fullsize,buffer);
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if (res==0)
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{
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file->filepos+=fullsize;
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fullsize=fullsize/size;
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return(fullsize);
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}
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else return(0);
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}
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*/
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file->ungetc_buf = EOF;
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if (file->filepos >= file->buffer_start && file->filepos < file->buffer_end) // drop buffer, if change his data
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{
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file->buffer_start = -1;
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file->buffer_end = -1;
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}
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if ((file->mode &3)==FILE_OPEN_WRITE || (file->mode&3)==FILE_OPEN_APPEND) // always true, as read checked previous
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{
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if (file->filepos==0)
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{ //file mot created yet
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res=_ksys_rewritefile(file->filename,fullsize,buffer);
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if (res==0)
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{
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file->filepos+=fullsize;
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return(count);
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} else
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{
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errno = -res;
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return(0);
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}
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}
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else
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{
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res=_ksys_appendtofile(file->filename,file->filepos,fullsize,buffer);
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if (res==0)
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{
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file->filepos+=fullsize;
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return(count);
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} else
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{
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errno = -res;
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return(0);
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}
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}
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}
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else return(0);
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}
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