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kolibri-libc: Reimplement fgets, fputc, fputs, fread and fwrite

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Now it follows the POSIX specification better.

git-svn-id: svn://kolibrios.org@8624 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Magomed Kostoev (mkostoevr) 2021-03-02 18:57:57 +00:00
parent 23ada42423
commit 162d919194
5 changed files with 85 additions and 25 deletions
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33
contrib/kolibri-libc/source/stdio/fgetc.c
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@ -1,11 +1,38 @@
#include <stdio.h>
#include <errno.h>
#include <ksys.h>
int fgetc(FILE* stream)
{
int c, rc;
rc = fread(&c, sizeof(char), 1, stream);
if(rc<1){
unsigned bytes_read;
char c;
unsigned status = _ksys_file_read_file(stream->name, stream->position, 1, &c, &bytes_read);
if (status != _KOS_FS_ERR_SUCCESS) {
switch (status) {
case _KOS_FS_ERR_EOF:
stream->eof = 1;
break;
case _KOS_FS_ERR_1:
case _KOS_FS_ERR_2:
case _KOS_FS_ERR_3:
case _KOS_FS_ERR_4:
case _KOS_FS_ERR_5:
case _KOS_FS_ERR_7:
case _KOS_FS_ERR_8:
case _KOS_FS_ERR_9:
case _KOS_FS_ERR_10:
case _KOS_FS_ERR_11:
default:
// Just some IO error, who knows what exactly happened
errno = EIO;
stream->error = errno;
break;
}
return EOF;
}
stream->position++;
return c;
}

32
contrib/kolibri-libc/source/stdio/fputc.c
View File

@ -1,9 +1,35 @@
#include <stdio.h>
#include <errno.h>
#include <ksys.h>
int fputc(int sym, FILE *stream)
int fputc(int c, FILE *stream)
{
if(!fwrite(&sym, sizeof(char), 1, stream)){
unsigned bytes_written;
unsigned status = _ksys_file_write_file(stream->name, stream->position, 1, &c, &bytes_written);
if (status != _KOS_FS_ERR_SUCCESS) {
switch (status) {
case _KOS_FS_ERR_1:
case _KOS_FS_ERR_2:
case _KOS_FS_ERR_3:
case _KOS_FS_ERR_4:
case _KOS_FS_ERR_5:
case _KOS_FS_ERR_EOF:
case _KOS_FS_ERR_7:
case _KOS_FS_ERR_8:
case _KOS_FS_ERR_9:
case _KOS_FS_ERR_10:
case _KOS_FS_ERR_11:
default:
// Just some IO error, who knows what exactly happened
errno = EIO;
stream->error = errno;
break;
}
return EOF;
}
return sym;
stream->position++;
return c;
}

9
contrib/kolibri-libc/source/stdio/fputs.c
View File

@ -2,9 +2,10 @@
#include <string.h>
int fputs(const char *str, FILE *stream){
int s_code;
for(int i=0; i<strlen(str) && s_code!=EOF; i++){
s_code = fputc(str[i], stream);
for(size_t i = 0; i < strlen(str); i++){
if (fputc(str[i], stream) == EOF) {
return EOF;
}
}
return s_code;
return 0;
}

18
contrib/kolibri-libc/source/stdio/fread.c
View File

@ -3,14 +3,18 @@
size_t fread(void *restrict ptr, size_t size, size_t nmemb, FILE *restrict stream) {
unsigned bytes_read = 0;
unsigned bytes_count = size * nmemb;
_ksys_file_read_file(stream->name, stream->position, bytes_count, ptr, &bytes_read);
stream->position += bytes_read;
ksys_bdfe_t info;
// TODO: Handle _ksys_file_get_info error somehow
if (!_ksys_file_get_info(stream->name, &info)) {
if (stream->position >= info.size) {
stream->eof = 1;
for (size_t i = 0; i < bytes_count; i++) {
char c = fgetc(stream);
if (c == EOF) {
break;
}
ptr[i] = c;
bytes_read++;
}
return bytes_read / size;
}

18
contrib/kolibri-libc/source/stdio/fwrite.c
View File

@ -1,16 +1,18 @@
#include <stdio.h>
size_t fwrite(const void * restrict ptr,size_t size, size_t nmemb,FILE * restrict stream) {
size_t fwrite(const void *restrict ptr, size_t size, size_t nmemb, FILE *restrict stream) {
unsigned bytes_written = 0;
unsigned bytes_count = size * nmemb;
_ksys_file_write_file(stream->name, stream->position, bytes_count, ptr, &bytes_written);
stream->position += bytes_written;
ksys_bdfe_t info;
// TODO: Handle _ksys_file_get_info error somehow
if (!_ksys_file_get_info(stream->name, &info)) {
if (stream->position >= info.size) {
stream->eof = 1;
for (size_t i = 0; i < bytes_count; i++) {
char c = ptr[i];
if (fputc(c, stream) != c) {
break;
}
bytes_written++;
}
return bytes_written / size;
}