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libc: Implement fwrite()

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Now that we have the write() syscall and libc wrapper, fwrite can finally be implemented.
This commit is contained in:
apio 2022-10-11 21:09:30 +02:00
parent 80ab982fe4
commit 2f46e46aa4
1 changed files with 13 additions and 3 deletions
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16
libs/libc/src/file.cpp
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@ -5,6 +5,9 @@
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h> #include <unistd.h>
FILE* __stderr;
FILE* __stdout;
extern "C" extern "C"
{ {
int fclose(FILE* stream) int fclose(FILE* stream)
@ -29,7 +32,7 @@ extern "C"
FILE* fopen(const char* pathname, const char*) FILE* fopen(const char* pathname, const char*)
{ {
int fd = open(pathname, O_RDONLY); // FIXME: Use the mode string. int fd = open(pathname, O_RDWR); // FIXME: Use the mode string.
if (fd < 0) { return 0; } if (fd < 0) { return 0; }
FILE* stream = (FILE*)malloc(sizeof(FILE)); FILE* stream = (FILE*)malloc(sizeof(FILE));
stream->f_fd = fd; stream->f_fd = fd;
@ -74,9 +77,16 @@ extern "C"
NOT_IMPLEMENTED("ftell"); NOT_IMPLEMENTED("ftell");
} }
size_t fwrite(const void*, size_t, size_t, FILE*) size_t fwrite(const void* buf, size_t size, size_t nmemb, FILE* stream)
{ {
NOT_IMPLEMENTED("fwrite"); ssize_t status = write(stream->f_fd, buf, size * nmemb);
if (status < 0)
{
stream->f_err = 1;
return 0;
}
if (status == 0) stream->f_eof = 1;
return (size_t)status;
} }
void setbuf(FILE*, char*) void setbuf(FILE*, char*)