179 lines
5.1 KiB
C
179 lines
5.1 KiB
C
/*
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compat: Some compatibility functions and header inclusions.
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Basic standard C stuff, that may barely be above/around C89.
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The mpg123 code is determined to keep it's legacy. A legacy of old, old UNIX.
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It is envisioned to include this compat header instead of any of the "standard" headers, to catch compatibility issues.
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So, don't include stdlib.h or string.h ... include compat.h.
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copyright 2007-8 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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initially written by Thomas Orgis
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*/
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#ifndef MPG123_COMPAT_H
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#define MPG123_COMPAT_H
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#include "config.h"
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#include "intsym.h"
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#ifdef HAVE_STDLIB_H
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/* realloc, size_t */
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#include <stdlib.h>
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#endif
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#include <stdio.h>
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#include <math.h>
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#ifdef HAVE_SIGNAL_H
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#include <signal.h>
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#else
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#ifdef HAVE_SYS_SIGNAL_H
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#include <sys/signal.h>
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#endif
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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/* Types, types, types. */
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/* Do we actually need these two in addition to sys/types.h? As replacement? */
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_INTTYPES_H
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#include <inttypes.h>
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#endif
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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/* We want SIZE_MAX, etc. */
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#ifndef SIZE_MAX
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#define SIZE_MAX ((size_t)-1)
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#endif
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#ifndef ULONG_MAX
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#define ULONG_MAX ((unsigned long)-1)
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef OS2
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#include <float.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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/* For select(), I need select.h according to POSIX 2001, else: sys/time.h sys/types.h unistd.h */
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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/* To parse big numbers... */
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#ifdef HAVE_ATOLL
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#define atobigint atoll
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#else
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#define atobigint atol
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#endif
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typedef unsigned char byte;
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/* A safe realloc also for very old systems where realloc(NULL, size) returns NULL. */
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void *safe_realloc(void *ptr, size_t size);
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#ifndef HAVE_STRERROR
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const char *strerror(int errnum);
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#endif
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#ifndef HAVE_STRDUP
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char *strdup(const char *s);
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#endif
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/* If we have the size checks enabled, try to derive some sane printfs.
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Simple start: Use max integer type and format if long is not big enough.
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I am hesitating to use %ll without making sure that it's there... */
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#if !(defined PLAIN_C89) && (defined SIZEOF_OFF_T) && (SIZEOF_OFF_T > SIZEOF_LONG) && (defined PRIiMAX)
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# define OFF_P PRIiMAX
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typedef intmax_t off_p;
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#else
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# define OFF_P "li"
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typedef long off_p;
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#endif
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#if !(defined PLAIN_C89) && (defined SIZEOF_SIZE_T) && (SIZEOF_SIZE_T > SIZEOF_LONG) && (defined PRIuMAX)
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# define SIZE_P PRIuMAX
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typedef uintmax_t size_p;
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#else
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# define SIZE_P "lu"
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typedef unsigned long size_p;
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#endif
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#if !(defined PLAIN_C89) && (defined SIZEOF_SSIZE_T) && (SIZEOF_SSIZE_T > SIZEOF_LONG) && (defined PRIiMAX)
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# define SSIZE_P PRIuMAX
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typedef intmax_t ssize_p;
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#else
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# define SSIZE_P "li"
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typedef long ssize_p;
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#endif
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/**
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* Opening a file handle can be different.
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* This function here is defined to take a path in native encoding (ISO8859 / UTF-8 / ...), or, when MS Windows Unicode support is enabled, an UTF-8 string that will be converted back to native UCS-2 (wide character) before calling the system's open function.
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* @param[in] wptr Pointer to wide string.
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* @param[in] mbptr Pointer to multibyte string.
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* @return file descriptor (>=0) or error code.
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*/
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int compat_open(const char *filename, int flags);
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/**
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* Closing a file handle can be platform specific.
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* This function takes a file descriptor that is to be closed.
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* @param[in] infd File descriptor to be closed.
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* @return 0 if the file was successfully closed. A return value of -1 indicates an error.
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*/
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int compat_close(int infd);
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/* Those do make sense in a separate file, but I chose to include them in compat.c because that's the one source whose object is shared between mpg123 and libmpg123 -- and both need the functionality internally. */
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#ifdef WANT_WIN32_UNICODE
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/**
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* win32_uni2mbc
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* Converts a null terminated UCS-2 string to a multibyte (UTF-8) equivalent.
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* Caller is supposed to free allocated buffer.
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* @param[in] wptr Pointer to wide string.
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* @param[out] mbptr Pointer to multibyte string.
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* @param[out] buflen Optional parameter for length of allocated buffer.
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* @return status of WideCharToMultiByte conversion.
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*
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* WideCharToMultiByte - http://msdn.microsoft.com/en-us/library/dd374130(VS.85).aspx
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*/
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int win32_wide_utf8(const wchar_t * const wptr, char **mbptr, size_t * buflen);
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/**
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* win32_mbc2uni
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* Converts a null terminated UTF-8 string to a UCS-2 equivalent.
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* Caller is supposed to free allocated buffer.
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* @param[out] mbptr Pointer to multibyte string.
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* @param[in] wptr Pointer to wide string.
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* @param[out] buflen Optional parameter for length of allocated buffer.
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* @return status of WideCharToMultiByte conversion.
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*
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* MultiByteToWideChar - http://msdn.microsoft.com/en-us/library/dd319072(VS.85).aspx
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*/
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int win32_utf8_wide(const char *const mbptr, wchar_t **wptr, size_t *buflen);
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#endif
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/* That one comes from Tellie on OS/2, needed in resolver. */
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#ifdef __KLIBC__
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typedef int socklen_t;
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#endif
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#endif
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