sortix-mirror/libmaxsi/io.cpp

167 lines
4.0 KiB
C++

/******************************************************************************
COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
This file is part of LibMaxsi.
LibMaxsi is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
io.cpp
Functions for management of input and output.
******************************************************************************/
#include "platform.h"
#include "syscall.h"
#include "io.h"
#include "format.h"
#include "string.h"
#include <sys/readdirents.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <error.h>
#include <stdlib.h>
namespace Maxsi
{
DEFN_SYSCALL1(size_t, SysPrint, 4, const char*);
DEFN_SYSCALL3(ssize_t, SysRead, 18, int, void*, size_t);
DEFN_SYSCALL3(ssize_t, SysWrite, 19, int, const void*, size_t);
DEFN_SYSCALL1(int, SysPipe, 20, int*);
DEFN_SYSCALL1(int, SysClose, 21, int);
DEFN_SYSCALL1(int, SysDup, 22, int);
DEFN_SYSCALL3(int, SysOpen, 23, const char*, int, mode_t);
DEFN_SYSCALL3(int, SysReadDirEnts, 24, int, struct sortix_dirent*, size_t);
DEFN_SYSCALL1(int, SysChDir, 25, const char*);
DEFN_SYSCALL2(char*, SysGetCWD, 26, char*, size_t);
DEFN_SYSCALL1(int, SysUnlink, 27, const char*);
size_t Print(const char* string)
{
size_t stringlen = String::Length(string);
if ( writeall(1, string, stringlen) ) { return 0; }
return stringlen;
}
size_t PrintCallback(void* user, const char* string, size_t stringlen)
{
if ( writeall(1, string, stringlen) ) { return 0; }
return stringlen;
}
size_t PrintF(const char* format, ...)
{
va_list list;
va_start(list, format);
size_t result = Maxsi::Format::Virtual(PrintCallback, NULL, format, list);
va_end(list);
return result;
}
#ifdef LIBMAXSI_LIBC
extern "C" int printf(const char* /*restrict*/ format, ...)
{
va_list list;
va_start(list, format);
size_t result = Maxsi::Format::Virtual(PrintCallback, NULL, format, list);
va_end(list);
return (int) result;
}
extern "C" void error(int status, int errnum, const char *format, ...)
{
printf("%s: ", program_invocation_name);
va_list list;
va_start(list, format);
size_t result = Maxsi::Format::Virtual(PrintCallback, NULL, format, list);
va_end(list);
printf(": %s\n", strerror(errnum));
if ( status ) { exit(status); }
}
extern "C" void perror(const char* s)
{
error(0, errno, "%s", s);
}
extern "C" ssize_t read(int fd, void* buf, size_t count)
{
return SysRead(fd, buf, count);
}
extern "C" ssize_t write(int fd, const void* buf, size_t count)
{
return SysWrite(fd, buf, count);
}
extern "C" int writeall(int fd, const void* buffer, size_t len)
{
const char* buf = (const char*) buffer;
while ( len )
{
ssize_t byteswritten = write(fd, buf, len);
if ( byteswritten < 0 ) { return (int) byteswritten; }
buf += byteswritten;
len -= byteswritten;
}
return 0;
}
extern "C" int pipe(int pipefd[2])
{
return SysPipe(pipefd);
}
extern "C" int close(int fd)
{
return SysClose(fd);
}
extern "C" int dup(int fd)
{
return SysDup(fd);
}
extern "C" int open(const char* path, int flags, mode_t mode)
{
return SysOpen(path, flags, mode);
}
extern "C" int readdirents(int fd, struct sortix_dirent* dirent, size_t size)
{
return SysReadDirEnts(fd, dirent, size);
}
extern "C" int chdir(const char* path)
{
return SysChDir(path);
}
extern "C" char* getcwd(char* buf, size_t size)
{
return SysGetCWD(buf, size);
}
extern "C" int unlink(const char* pathname)
{
return SysUnlink(pathname);
}
#endif
}