Egor00f
c121db7a88
Use bitfield `flags` flags in file instead of `int` variables `mode`, `error`, `eof`. And rewrite weird logic opening/close files Reviewed-on: #691 Reviewed-by: Ivan B <1+dunkaist@noreply.localhost> Reviewed-by: Kiril Lipatov <lipatov.kiril@gmail.com> Co-authored-by: Egor00f <y.yarin@inbox.ru>
45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
#include <stdio.h>
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#include <errno.h>
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#include "../sys/_conio.h"
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#include "sys/ksys.h"
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size_t fread(void *restrict ptr, size_t size, size_t nmemb, FILE *restrict stream) {
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unsigned bytes_read = 0;
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unsigned bytes_count = size * nmemb;
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if(!stream){
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errno = EBADF;
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return 0;
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}
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if(size<=0 || nmemb<=0){
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errno = EINVAL;
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stream->flags.error = true;
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return 0;
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}
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if(stream==stdin){
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console_gets((char*)ptr, bytes_count+1);
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return nmemb;
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}
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if(stream->flags.read){
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if(!stream->__ungetc_emu_buff){
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((char*) ptr)[0]=(char)stream->__ungetc_emu_buff;
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//debug_printf("Ungetc: %x\n", ((char*) ptr)[0]);
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}
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unsigned status = _ksys_file_read_file(stream->name, stream->position, bytes_count, ptr , &bytes_read);
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if (status != KSYS_FS_ERR_SUCCESS) {
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if(status == KSYS_FS_ERR_EOF){
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stream->flags.eof = true;
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}else{
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errno = EIO;
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stream->flags.error = true;
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return 0;
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}
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}
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stream->position+=bytes_read;
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}
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return bytes_read/size;
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}
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