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#include <stdio.h>
#include <stdarg.h>
#include <sys/types.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#include <stdlib.h>
#include <Kernel/Syscall.h>
#include <AK/printf.cpp>
extern "C" {
int fileno(FILE* stream)
{
assert(stream);
return stream->fd;
}
int feof(FILE* stream)
{
assert(stream);
return stream->eof;
}
int fflush(FILE* stream)
{
// FIXME: Implement buffered streams, duh.
if (!stream)
return -EBADF;
if (!stream->write_buffer_index)
return 0;
int rc = write(stream->fd, stream->write_buffer, stream->write_buffer_index);
stream->write_buffer_index = 0;
return rc;
}
char* fgets(char* buffer, int size, FILE* stream)
{
assert(stream);
ssize_t nread = 0;
for (;;) {
if (nread >= size)
break;
char ch = fgetc(stream);
if (feof(stream))
break;
buffer[nread++] = ch;
if (!ch || ch == '\n')
break;
}
if (nread < size)
buffer[nread] = '\0';
return buffer;
}
int fgetc(FILE* stream)
{
assert(stream);
char ch;
fread(&ch, sizeof(char), 1, stream);
return ch;
}
int getc(FILE* stream)
{
return fgetc(stream);
}
int getchar()
{
return getc(stdin);
}
int fputc(int ch, FILE* stream)
{
assert(stream);
assert(stream->write_buffer_index < __STDIO_FILE_BUFFER_SIZE);
stream->write_buffer[stream->write_buffer_index++] = ch;
if (ch == '\n' || stream->write_buffer_index >= __STDIO_FILE_BUFFER_SIZE)
fflush(stream);
if (stream->eof)
return EOF;
return (byte)ch;
}
int putc(int ch, FILE* stream)
{
return fputc(ch, stream);
}
int putchar(int ch)
{
return putc(ch, stdout);
}
int fputs(const char* s, FILE* stream)
{
for (; *s; ++s) {
int rc = putc(*s, stream);
if (rc == EOF)
return EOF;
}
return putc('\n', stream);
}
int puts(const char* s)
{
return fputs(s, stdout);
}
void clearerr(FILE* stream)
{
assert(stream);
stream->eof = false;
stream->error = false;
}
int ferror(FILE* stream)
{
return stream->error;
}
size_t fread(void* ptr, size_t size, size_t nmemb, FILE* stream)
{
assert(stream);
ssize_t nread = read(stream->fd, ptr, nmemb * size);
if (nread < 0)
return 0;
if (nread == 0)
stream->eof = true;
return nread;
}
size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE* stream)
{
assert(stream);
fflush(stream);
ssize_t nwritten = write(stream->fd, ptr, nmemb * size);
if (nwritten < 0)
return 0;
return nwritten;
}
int fseek(FILE* stream, long offset, int whence)
{
assert(stream);
off_t off = lseek(stream->fd, offset, whence);
if (off < 0)
return off;
return 0;
}
long ftell(FILE* stream)
{
assert(stream);
return lseek(stream->fd, 0, SEEK_CUR);
}
void rewind(FILE* stream)
{
fseek(stream, 0, SEEK_SET);
}
static void sys_putch(char*&, char ch)
{
putchar(ch);
}
static FILE* __current_stream = nullptr;
static void stream_putch(char*&, char ch)
{
fputc(ch, __current_stream);
}
int fprintf(FILE* fp, const char* fmt, ...)
{
__current_stream = fp;
va_list ap;
va_start(ap, fmt);
int ret = printfInternal(stream_putch, nullptr, fmt, ap);
va_end(ap);
return ret;
}
int printf(const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int ret = printfInternal(sys_putch, nullptr, fmt, ap);
va_end(ap);
return ret;
}
static void buffer_putch(char*& bufptr, char ch)
{
*bufptr++ = ch;
}
int sprintf(char* buffer, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int ret = printfInternal(buffer_putch, buffer, fmt, ap);
buffer[ret] = '\0';
va_end(ap);
return ret;
}
void perror(const char* s)
{
fprintf(stderr, "%s: %s\n", s, strerror(errno));
}
FILE* fopen(const char* pathname, const char* mode)
{
assert(!strcmp(mode, "r") || !strcmp(mode, "rb"));
int fd = open(pathname, O_RDONLY);
if (fd < 0)
return nullptr;
auto* fp = (FILE*)malloc(sizeof(FILE));
memset(fp, 0, sizeof(FILE));
fp->fd = fd;
return fp;
}
FILE* fdopen(int fd, const char* mode)
{
assert(!strcmp(mode, "r") || !strcmp(mode, "rb"));
if (fd < 0)
return nullptr;
auto* fp = (FILE*)malloc(sizeof(FILE));
memset(fp, 0, sizeof(FILE));
fp->fd = fd;
return fp;
}
int fclose(FILE* stream)
{
int rc = close(stream->fd);
free(stream);
return rc;
}
}
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