/* General purpose, i.e. non SoX specific, utility functions and macros. * * (c) 2006-8 Chris Bagwell and SoX contributors * * This library 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 2.1 of the License, or (at * your option) any later version. * * This library 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 this library; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA */ #include <stdio.h>#include <stdlib.h>#include <inttypes.h>#include "soxconfig.h" #ifdef HAVE_SYS_TYPES_H#include <sys/types.h> /* For off_t not found in stdio.h */#endif #ifdef HAVE_SYS_STAT_H#include <sys/stat.h> /* Needs to be included before we redefine off_t. */#endif #include "xmalloc.h" /*---------------------------- Portability stuff -----------------------------*/ #ifdef __GNUC__#define NORET __attribute__((noreturn))#define UNUSED __attribute__ ((unused))#else#define NORET#define UNUSED#endif #ifdef _MSC_VER #define __STDC__ 1#define O_BINARY _O_BINARY#define O_CREAT _O_CREAT#define O_RDWR _O_RDWR#define O_TRUNC _O_TRUNC#define S_IFMT _S_IFMT#define S_IFREG _S_IFREG#define S_IREAD _S_IREAD#define S_IWRITE _S_IWRITE#define close _close#define dup _dup#define fdopen _fdopen#define fileno _fileno #ifdef _fstati64#define fstat _fstati64#else#define fstat _fstat#endif #define ftime _ftime#define inline __inline#define isatty _isatty#define kbhit _kbhit#define mktemp _mktemp#define off_t _off_t#define open _open#define pclose _pclose#define popen _popen#define setmode _setmode#define snprintf _snprintf #ifdef _stati64#define stat _stati64#else#define stat _stat#endif #define strdup _strdup#define timeb _timeb#define unlink _unlink #if defined(HAVE__FSEEKI64) && !defined(HAVE_FSEEKO)#undef off_t#define fseeko _fseeki64#define ftello _ftelli64#define off_t __int64#define HAVE_FSEEKO 1#endif #elif defined(__MINGW32__) #if !defined(HAVE_FSEEKO)#undef off_t#define fseeko fseeko64#define fstat _fstati64#define ftello ftello64#define off_t off64_t#define stat _stati64#define HAVE_FSEEKO 1#endif #endif #if defined(DOS) || defined(WIN32) || defined(__NT__) || defined(__DJGPP__) || defined(__OS2__)  #define LAST_SLASH(path) max(strrchr(path, '/'), strrchr(path, '\\'))  #define IS_ABSOLUTE(path) ((path)[0] == '/' || (path)[0] == '\\' || (path)[1] == ':')  #define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)  #define POPEN_MODE "rb"#else  #define LAST_SLASH(path) strrchr(path, '/')  #define IS_ABSOLUTE(path) ((path)[0] == '/')  #define SET_BINARY_MODE(file)#endif #ifdef WORDS_BIGENDIAN  #define MACHINE_IS_BIGENDIAN 1  #define MACHINE_IS_LITTLEENDIAN 0#else  #define MACHINE_IS_BIGENDIAN 0  #define MACHINE_IS_LITTLEENDIAN 1#endif /*--------------------------- Language extensions ----------------------------*/ /* Compile-time ("static") assertion *//*   e.g. assert_static(sizeof(int) >= 4, int_type_too_small)    */#define assert_static(e,f) enum {assert_static__##f = 1/(e)}#define array_length(a) (sizeof(a)/sizeof(a[0]))#define field_offset(type, field) ((size_t)&(((type *)0)->field))#define unless(x) if (!(x)) /*------------------------------- Maths stuff --------------------------------*/ #include <math.h> #ifdef min#undef min#endif#define min(a, b) ((a) <= (b) ? (a) : (b)) #ifdef max#undef max#endif#define max(a, b) ((a) >= (b) ? (a) : (b)) #define range_limit(x, lower, upper) (min(max(x, lower), upper)) #ifndef M_PI#define M_PI    3.14159265358979323846#endif#ifndef M_PI_2#define M_PI_2  1.57079632679489661923  /* pi/2 */#endif#ifndef M_LN10#define M_LN10  2.30258509299404568402  /* natural log of 10 */#endif#ifndef M_SQRT2#define M_SQRT2  sqrt(2.)#endif #define sqr(a) ((a) * (a))#define sign(x) ((x) < 0? -1 : 1) /* Numerical Recipes in C, p. 284 */#define ranqd1(x) ((x) = 1664525L * (x) + 1013904223L) /* int32_t x */#define dranqd1(x) (ranqd1(x) * (1. / (65536. * 32768.))) /* [-1,1) */ #define dB_to_linear(x) exp((x) * M_LN10 * 0.05)#define linear_to_dB(x) (log10(x) * 20) extern int lsx_strcasecmp(const char *s1, const char *st);extern int lsx_strncasecmp(char const *s1, char const *s2, size_t n); #ifndef HAVE_STRCASECMP#define strcasecmp(s1, s2) lsx_strcasecmp((s1), (s2))#define strncasecmp(s1, s2, n) lsx_strncasecmp((s1), (s2), (n))#endif