reactos/lib/3rdparty/libmpg123/compat.c

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/*
compat: Some compatibility functions.
The mpg123 code is determined to keep it's legacy. A legacy of old, old UNIX.
So anything possibly somewhat advanced should be considered to be put here, with proper #ifdef;-)
copyright 2007-8 by the mpg123 project - free software under the terms of the LGPL 2.1
see COPYING and AUTHORS files in distribution or http://mpg123.org
initially written by Thomas Orgis, Windows Unicode stuff by JonY.
*/
#include "config.h"
#include "compat.h"
#ifdef _MSC_VER
#include <io.h>
#else
#include <fcntl.h>
#endif
#ifdef WANT_WIN32_UNICODE
#include <wchar.h>
#include <windows.h>
#include <winnls.h>
#endif
#include "debug.h"
/* A safe realloc also for very old systems where realloc(NULL, size) returns NULL. */
void *safe_realloc(void *ptr, size_t size)
{
if(ptr == NULL) return malloc(size);
else return realloc(ptr, size);
}
#ifndef HAVE_STRERROR
const char *strerror(int errnum)
{
extern int sys_nerr;
extern char *sys_errlist[];
return (errnum < sys_nerr) ? sys_errlist[errnum] : "";
}
#endif
#ifndef HAVE_STRDUP
char *strdup(const char *src)
{
char *dest;
if (!(dest = (char *) malloc(strlen(src)+1)))
return NULL;
else
return strcpy(dest, src);
}
#endif
int compat_open(const char *filename, int mode)
{
int ret;
#if defined (WANT_WIN32_UNICODE)
const wchar_t *frag = NULL;
ret = win32_utf8_wide(filename, &frag, NULL);
if ((frag == NULL) || (ret == 0)) goto fallback; /* Fallback to plain open when ucs-2 conversion fails */
ret = _wopen(frag, mode); /*Try _wopen */
if (ret != -1 ) goto open_ok; /* msdn says -1 means failure */
fallback:
#endif
#ifdef __MSVCRT__ /* MSDN says POSIX function is deprecated beginning in Visual C++ 2005 */
ret = _open (filename, mode); /* Try plain old _open(), if it fails, do nothing */
#else
ret = open (filename, mode);
#endif
#if defined (WANT_WIN32_UNICODE)
open_ok:
free ((void *)frag); /* Freeing a NULL should be OK */
#endif
return ret;
}
int compat_close(int infd)
{
#ifdef __MSVCRT__ /* MSDN says POSIX function is deprecated beginning in Visual C++ 2005 */
return _close(infd);
#else
return close(infd);
#endif
}
/* Windows Unicode stuff */
#ifdef WANT_WIN32_UNICODE
int win32_wide_utf8(const wchar_t * const wptr, const char **const mbptr, size_t * const buflen)
{
size_t len;
char *buf;
int ret;
len = WideCharToMultiByte(CP_UTF8, 0, wptr, -1, NULL, 0, NULL, NULL); /* Get utf-8 string length */
buf = calloc(len, sizeof (char)); /* Can we assume sizeof char always = 1? */
debug2("win32_wide_utf8 allocated %u bytes at %p", len, buf);
if(buf != NULL)
{
ret = WideCharToMultiByte(CP_UTF8, 0, wptr, -1, buf, len, NULL, NULL); /*Do actual conversion*/
*mbptr = buf; /* Set string pointer to allocated buffer */
if(buflen != NULL) *buflen = len * sizeof (char); /* Give length of allocated memory if needed. */
return ret;
}
else
{
if(buflen != NULL) *buflen = 0;
return 0;
}
}
int win32_utf8_wide(const char *const mbptr, const wchar_t ** const wptr, size_t * const buflen)
{
size_t len;
wchar_t *buf;
int ret;
len = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, mbptr, -1, NULL, 0); /* Get converted size */
buf = calloc(len, sizeof (wchar_t)); /* Allocate memory accordingly */
debug2("win32_utf8_wide allocated %u bytes at %p", len, buf);
if(buf != NULL)
{
ret = MultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS, mbptr, -1, buf, len); /* Do conversion */
*wptr = buf; /* Set string pointer to allocated buffer */
if (buflen != NULL) *buflen = len * sizeof (wchar_t); /* Give length of allocated memory if needed. */
return ret;
}
else
{
if (buflen != NULL) *buflen = 0;
return 0;
}
}
#endif