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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 <unistd.h>
#include <fcntl.h>
#include <AK/printf.cpp>
#include <AK/StdLibExtras.h>
#include <Kernel/Syscall.h>
extern "C" {
static FILE __default_streams[4];
FILE* stdin;
FILE* stdout;
FILE* stderr;
FILE* stddbg;
void init_FILE(FILE& fp, int fd, int mode)
{
fp.fd = fd;
fp.buffer = fp.default_buffer;
fp.buffer_size = BUFSIZ;
fp.mode = mode;
}
static FILE* make_FILE(int fd)
{
auto* fp = (FILE*)malloc(sizeof(FILE));
memset(fp, 0, sizeof(FILE));
init_FILE(*fp, fd, isatty(fd));
return fp;
}
void __stdio_init()
{
stdin = &__default_streams[0];
stdout = &__default_streams[1];
stderr = &__default_streams[2];
stddbg = &__default_streams[3];
init_FILE(*stdin, 0, isatty(0) ? _IOLBF : _IOFBF);
init_FILE(*stdout, 1, isatty(1) ? _IOLBF : _IOFBF);
init_FILE(*stderr, 2, _IONBF);
int fd = open("/dev/debuglog", O_WRONLY | O_CLOEXEC);
if (fd < 0) {
perror("open /dev/debuglog");
ASSERT_NOT_REACHED();
}
init_FILE(*stddbg, fd, _IOLBF);
}
int setvbuf(FILE* stream, char* buf, int mode, size_t size)
{
if (mode != _IONBF && mode != _IOLBF && mode != _IOFBF) {
errno = EINVAL;
return -1;
}
stream->mode = mode;
if (buf) {
stream->buffer = buf;
stream->buffer_size = size;
} else {
stream->buffer = stream->default_buffer;
stream->buffer_size = BUFSIZ;
}
stream->buffer_index = 0;
return 0;
}
void setbuf(FILE* stream, char* buf)
{
setvbuf(stream, buf, buf ? _IOFBF : _IONBF, BUFSIZ);
}
void setlinebuf(FILE* stream)
{
setvbuf(stream, nullptr, _IOLBF, 0);
}
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->buffer_index)
return 0;
int rc = write(stream->fd, stream->buffer, stream->buffer_index);
stream->buffer_index = 0;
return rc;
}
char* fgets(char* buffer, int size, FILE* stream)
{
assert(stream);
ssize_t nread = 0;
for (;;) {
if (nread >= size)
break;
int ch = fgetc(stream);
if (ch == EOF) {
if (nread == 0)
return nullptr;
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;
size_t nread = fread(&ch, sizeof(char), 1, stream);
if (nread <= 0) {
stream->eof = nread == 0;
stream->error = -nread;
return EOF;
}
return ch;
}
int getc(FILE* stream)
{
return fgetc(stream);
}
int getchar()
{
return getc(stdin);
}
int ungetc(int c, FILE* stream)
{
ASSERT(stream);
stream->have_ungotten = true;
stream->ungotten = c;
stream->eof = false;
return c;
}
int fputc(int ch, FILE* stream)
{
assert(stream);
assert(stream->buffer_index < stream->buffer_size);
stream->buffer[stream->buffer_index++] = ch;
if (stream->buffer_index >= stream->buffer_size)
fflush(stream);
else if (stream->mode == _IONBF || (stream->mode == _IOLBF && ch == '\n'))
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 0;
}
int puts(const char* s)
{
int rc = fputs(s, stdout);
if (rc < 0)
return rc;
return fputc('\n', 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);
if (!size)
return 0;
ssize_t nread = 0;
if (stream->have_ungotten) {
// FIXME: Support ungotten character even if size != 1.
ASSERT(size == 1);
((char*)ptr)[0] = stream->ungotten;
stream->have_ungotten = false;
--nmemb;
if (!nmemb)
return 1;
ptr = &((char*)ptr)[1];
++nread;
}
ssize_t rc = read(stream->fd, ptr, nmemb * size);
if (rc < 0)
return 0;
if (rc == 0)
stream->eof = true;
nread += rc;
return nread / size;
}
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);
}
int dbgprintf(const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int ret = vfprintf(stddbg, fmt, ap);
va_end(ap);
return ret;
}
static void stdout_putch(char*&, char ch)
{
putchar(ch);
}
static FILE* __current_stream = nullptr;
static void stream_putch(char*&, char ch)
{
fputc(ch, __current_stream);
}
int vfprintf(FILE* stream, const char* fmt, va_list ap)
{
__current_stream = stream;
return printf_internal(stream_putch, nullptr, fmt, ap);
}
int fprintf(FILE* stream, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int ret = vfprintf(stream, fmt, ap);
va_end(ap);
return ret;
}
int vprintf(const char* fmt, va_list ap)
{
return printf_internal(stdout_putch, nullptr, fmt, ap);
}
int printf(const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int ret = vprintf(fmt, ap);
va_end(ap);
return ret;
}
static void buffer_putch(char*& bufptr, char ch)
{
*bufptr++ = ch;
}
int vsprintf(char* buffer, const char* fmt, va_list ap)
{
int ret = printf_internal(buffer_putch, buffer, fmt, ap);
buffer[ret] = '\0';
return ret;
}
int sprintf(char* buffer, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int ret = vsprintf(buffer, fmt, ap);
buffer[ret] = '\0';
va_end(ap);
return ret;
}
static size_t __vsnprintf_space_remaining;
static void sized_buffer_putch(char*& bufptr, char ch)
{
if (__vsnprintf_space_remaining) {
*bufptr++ = ch;
--__vsnprintf_space_remaining;
}
}
int vsnprintf(char* buffer, size_t size, const char* fmt, va_list ap)
{
__vsnprintf_space_remaining = size;
int ret = printf_internal(sized_buffer_putch, buffer, fmt, ap);
buffer[ret] = '\0';
return ret;
}
int snprintf(char* buffer, size_t size, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int ret = vsnprintf(buffer, size, 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)
{
int flags = 0;
if (!strcmp(mode, "r") || !strcmp(mode, "rb"))
flags = O_RDONLY;
else if (!strcmp(mode, "r+") || !strcmp(mode, "rb+"))
flags = O_RDWR;
else if (!strcmp(mode, "w") || !strcmp(mode, "wb"))
flags = O_WRONLY | O_CREAT | O_TRUNC;
else if (!strcmp(mode, "w+") || !strcmp(mode, "wb+"))
flags = O_RDWR | O_CREAT | O_TRUNC;
else {
fprintf(stderr, "FIXME(LibC): fopen('%s', '%s')\n", pathname, mode);
ASSERT_NOT_REACHED();
}
int fd = open(pathname, flags, 0666);
if (fd < 0)
return nullptr;
return make_FILE(fd);
}
FILE* freopen(const char* pathname, const char* mode, FILE* stream)
{
(void)pathname;
(void)mode;
(void)stream;
ASSERT_NOT_REACHED();
}
FILE* fdopen(int fd, const char* mode)
{
UNUSED_PARAM(mode);
// FIXME: Verify that the mode matches how fd is already open.
if (fd < 0)
return nullptr;
return make_FILE(fd);
}
int fclose(FILE* stream)
{
fflush(stream);
int rc = close(stream->fd);
free(stream);
return rc;
}
int rename(const char* oldpath, const char* newpath)
{
int rc = syscall(SC_rename, oldpath, newpath);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
char* tmpnam(char*)
{
ASSERT_NOT_REACHED();
}
FILE* popen(const char* command, const char* type)
{
(void)command;
(void)type;
ASSERT_NOT_REACHED();
}
int pclose(FILE*)
{
ASSERT_NOT_REACHED();
}
int remove(const char* pathname)
{
int rc = unlink(pathname);
if (rc < 0 && errno != EISDIR)
return -1;
return rmdir(pathname);
}
int scanf(const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int count = vfscanf(stdin, fmt, ap);
va_end(ap);
return count;
}
int fscanf(FILE* stream, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int count = vfscanf(stream, fmt, ap);
va_end(ap);
return count;
}
int sscanf(const char* buffer, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int count = vsscanf(buffer, fmt, ap);
va_end(ap);
return count;
}
int vfscanf(FILE* stream, const char* fmt, va_list ap)
{
char buffer[BUFSIZ];
if (!fgets(buffer, sizeof(buffer) - 1, stream))
return -1;
return vsscanf(buffer, fmt, ap);
}
}
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