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Diffstat (limited to 'glib/gtypes.h')
| -rw-r--r-- | glib/gtypes.h | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/glib/gtypes.h b/glib/gtypes.h new file mode 100644 index 000000000..ac856a7d8 --- /dev/null +++ b/glib/gtypes.h @@ -0,0 +1,314 @@ +/* GLIB - Library of useful routines for C programming + * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald + * + * 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 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., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/* + * Modified by the GLib Team and others 1997-2000. See the AUTHORS + * file for a list of people on the GLib Team. See the ChangeLog + * files for a list of changes. These files are distributed with + * GLib at ftp://ftp.gtk.org/pub/gtk/. + */ + +#ifndef __G_TYPES_H__ +#define __G_TYPES_H__ + +#include <glibconfig.h> + +G_BEGIN_DECLS + +/* Provide type definitions for commonly used types. + * These are useful because a "gint8" can be adjusted + * to be 1 byte (8 bits) on all platforms. Similarly and + * more importantly, "gint32" can be adjusted to be + * 4 bytes (32 bits) on all platforms. + */ + +typedef char gchar; +typedef short gshort; +typedef long glong; +typedef int gint; +typedef gint gboolean; +typedef gchar* gstring; + +typedef unsigned char guchar; +typedef unsigned short gushort; +typedef unsigned long gulong; +typedef unsigned int guint; + +typedef float gfloat; +typedef double gdouble; + +/* HAVE_LONG_DOUBLE doesn't work correctly on all platforms. + * Since gldouble isn't used anywhere, just disable it for now */ + +#if 0 +#ifdef HAVE_LONG_DOUBLE +typedef long double gldouble; +#else /* HAVE_LONG_DOUBLE */ +typedef double gldouble; +#endif /* HAVE_LONG_DOUBLE */ +#endif /* 0 */ + +typedef void* gpointer; +typedef const void *gconstpointer; + +typedef gint (*GCompareFunc) (gconstpointer a, + gconstpointer b); +typedef void (*GDestroyNotify) (gpointer data); +typedef void (*GFunc) (gpointer data, + gpointer user_data); +typedef guint (*GHashFunc) (gconstpointer key); +typedef void (*GHFunc) (gpointer key, + gpointer value, + gpointer user_data); + +/* Define some mathematical constants that aren't available + * symbolically in some strict ISO C implementations. + */ +#define G_E 2.7182818284590452354E0 +#define G_LN2 6.9314718055994530942E-1 +#define G_LN10 2.3025850929940456840E0 +#define G_PI 3.14159265358979323846E0 +#define G_PI_2 1.57079632679489661923E0 +#define G_PI_4 0.78539816339744830962E0 +#define G_SQRT2 1.4142135623730950488E0 + +/* Portable endian checks and conversions + * + * glibconfig.h defines G_BYTE_ORDER which expands to one of + * the below macros. + */ +#define G_LITTLE_ENDIAN 1234 +#define G_BIG_ENDIAN 4321 +#define G_PDP_ENDIAN 3412 /* unused, need specific PDP check */ + + +/* Basic bit swapping functions + */ +#define GUINT16_SWAP_LE_BE_CONSTANT(val) ((guint16) ( \ + (((guint16) (val) & (guint16) 0x00ffU) << 8) | \ + (((guint16) (val) & (guint16) 0xff00U) >> 8))) +#define GUINT32_SWAP_LE_BE_CONSTANT(val) ((guint32) ( \ + (((guint32) (val) & (guint32) 0x000000ffU) << 24) | \ + (((guint32) (val) & (guint32) 0x0000ff00U) << 8) | \ + (((guint32) (val) & (guint32) 0x00ff0000U) >> 8) | \ + (((guint32) (val) & (guint32) 0xff000000U) >> 24))) + +/* Intel specific stuff for speed + */ +#if defined (__i386__) && defined (__GNUC__) && __GNUC__ >= 2 +# define GUINT16_SWAP_LE_BE_X86(val) \ + (__extension__ \ + ({ register guint16 __v; \ + if (__builtin_constant_p (val)) \ + __v = GUINT16_SWAP_LE_BE_CONSTANT (val); \ + else \ + __asm__ __const__ ("rorw $8, %w0" \ + : "=r" (__v) \ + : "0" ((guint16) (val))); \ + __v; })) +# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_X86 (val)) +# if !defined(__i486__) && !defined(__i586__) \ + && !defined(__pentium__) && !defined(__i686__) && !defined(__pentiumpro__) +# define GUINT32_SWAP_LE_BE_X86(val) \ + (__extension__ \ + ({ register guint32 __v; \ + if (__builtin_constant_p (val)) \ + __v = GUINT32_SWAP_LE_BE_CONSTANT (val); \ + else \ + __asm__ __const__ ("rorw $8, %w0\n\t" \ + "rorl $16, %0\n\t" \ + "rorw $8, %w0" \ + : "=r" (__v) \ + : "0" ((guint32) (val))); \ + __v; })) +# else /* 486 and higher has bswap */ +# define GUINT32_SWAP_LE_BE_X86(val) \ + (__extension__ \ + ({ register guint32 __v; \ + if (__builtin_constant_p (val)) \ + __v = GUINT32_SWAP_LE_BE_CONSTANT (val); \ + else \ + __asm__ __const__ ("bswap %0" \ + : "=r" (__v) \ + : "0" ((guint32) (val))); \ + __v; })) +# endif /* processor specific 32-bit stuff */ +# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_X86 (val)) +#else /* !__i386__ */ +# define GUINT16_SWAP_LE_BE(val) (GUINT16_SWAP_LE_BE_CONSTANT (val)) +# define GUINT32_SWAP_LE_BE(val) (GUINT32_SWAP_LE_BE_CONSTANT (val)) +#endif /* __i386__ */ + +#ifdef G_HAVE_GINT64 +# define GUINT64_SWAP_LE_BE_CONSTANT(val) ((guint64) ( \ + (((guint64) (val) & \ + (guint64) G_GINT64_CONSTANT(0x00000000000000ffU)) << 56) | \ + (((guint64) (val) & \ + (guint64) G_GINT64_CONSTANT(0x000000000000ff00U)) << 40) | \ + (((guint64) (val) & \ + (guint64) G_GINT64_CONSTANT(0x0000000000ff0000U)) << 24) | \ + (((guint64) (val) & \ + (guint64) G_GINT64_CONSTANT(0x00000000ff000000U)) << 8) | \ + (((guint64) (val) & \ + (guint64) G_GINT64_CONSTANT(0x000000ff00000000U)) >> 8) | \ + (((guint64) (val) & \ + (guint64) G_GINT64_CONSTANT(0x0000ff0000000000U)) >> 24) | \ + (((guint64) (val) & \ + (guint64) G_GINT64_CONSTANT(0x00ff000000000000U)) >> 40) | \ + (((guint64) (val) & \ + (guint64) G_GINT64_CONSTANT(0xff00000000000000U)) >> 56))) +# if defined (__i386__) && defined (__GNUC__) && __GNUC__ >= 2 +# define GUINT64_SWAP_LE_BE_X86(val) \ + (__extension__ \ + ({ union { guint64 __ll; \ + guint32 __l[2]; } __r; \ + if (__builtin_constant_p (val)) \ + __r.__ll = GUINT64_SWAP_LE_BE_CONSTANT (val); \ + else \ + { \ + union { guint64 __ll; \ + guint32 __l[2]; } __w; \ + __w.__ll = ((guint64) val); \ + __r.__l[0] = GUINT32_SWAP_LE_BE (__w.__l[1]); \ + __r.__l[1] = GUINT32_SWAP_LE_BE (__w.__l[0]); \ + } \ + __r.__ll; })) +# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_X86 (val)) +# else /* !__i386__ */ +# define GUINT64_SWAP_LE_BE(val) (GUINT64_SWAP_LE_BE_CONSTANT(val)) +# endif +#endif + +#define GUINT16_SWAP_LE_PDP(val) ((guint16) (val)) +#define GUINT16_SWAP_BE_PDP(val) (GUINT16_SWAP_LE_BE (val)) +#define GUINT32_SWAP_LE_PDP(val) ((guint32) ( \ + (((guint32) (val) & (guint32) 0x0000ffffU) << 16) | \ + (((guint32) (val) & (guint32) 0xffff0000U) >> 16))) +#define GUINT32_SWAP_BE_PDP(val) ((guint32) ( \ + (((guint32) (val) & (guint32) 0x00ff00ffU) << 8) | \ + (((guint32) (val) & (guint32) 0xff00ff00U) >> 8))) + +/* The G*_TO_?E() macros are defined in glibconfig.h. + * The transformation is symmetric, so the FROM just maps to the TO. + */ +#define GINT16_FROM_LE(val) (GINT16_TO_LE (val)) +#define GUINT16_FROM_LE(val) (GUINT16_TO_LE (val)) +#define GINT16_FROM_BE(val) (GINT16_TO_BE (val)) +#define GUINT16_FROM_BE(val) (GUINT16_TO_BE (val)) +#define GINT32_FROM_LE(val) (GINT32_TO_LE (val)) +#define GUINT32_FROM_LE(val) (GUINT32_TO_LE (val)) +#define GINT32_FROM_BE(val) (GINT32_TO_BE (val)) +#define GUINT32_FROM_BE(val) (GUINT32_TO_BE (val)) + +#ifdef G_HAVE_GINT64 +#define GINT64_FROM_LE(val) (GINT64_TO_LE (val)) +#define GUINT64_FROM_LE(val) (GUINT64_TO_LE (val)) +#define GINT64_FROM_BE(val) (GINT64_TO_BE (val)) +#define GUINT64_FROM_BE(val) (GUINT64_TO_BE (val)) +#endif + +#define GLONG_FROM_LE(val) (GLONG_TO_LE (val)) +#define GULONG_FROM_LE(val) (GULONG_TO_LE (val)) +#define GLONG_FROM_BE(val) (GLONG_TO_BE (val)) +#define GULONG_FROM_BE(val) (GULONG_TO_BE (val)) + +#define GINT_FROM_LE(val) (GINT_TO_LE (val)) +#define GUINT_FROM_LE(val) (GUINT_TO_LE (val)) +#define GINT_FROM_BE(val) (GINT_TO_BE (val)) +#define GUINT_FROM_BE(val) (GUINT_TO_BE (val)) + + +/* Portable versions of host-network order stuff + */ +#define g_ntohl(val) (GUINT32_FROM_BE (val)) +#define g_ntohs(val) (GUINT16_FROM_BE (val)) +#define g_htonl(val) (GUINT32_TO_BE (val)) +#define g_htons(val) (GUINT16_TO_BE (val)) + +/* IEEE Standard 754 Single Precision Storage Format (gfloat): + * + * 31 30 23 22 0 + * +--------+---------------+---------------+ + * | s 1bit | e[30:23] 8bit | f[22:0] 23bit | + * +--------+---------------+---------------+ + * B0------------------->B1------->B2-->B3--> + * + * IEEE Standard 754 Double Precision Storage Format (gdouble): + * + * 63 62 52 51 32 31 0 + * +--------+----------------+----------------+ +---------------+ + * | s 1bit | e[62:52] 11bit | f[51:32] 20bit | | f[31:0] 32bit | + * +--------+----------------+----------------+ +---------------+ + * B0--------------->B1---------->B2--->B3----> B4->B5->B6->B7-> + */ +/* subtract from biased_exponent to form base2 exponent (normal numbers) */ +typedef union _GDoubleIEEE754 GDoubleIEEE754; +typedef union _GFloatIEEE754 GFloatIEEE754; +#define G_IEEE754_FLOAT_BIAS (127) +#define G_IEEE754_DOUBLE_BIAS (1023) +/* multiply with base2 exponent to get base10 exponent (nomal numbers) */ +#define G_LOG_2_BASE_10 (0.30102999566398119521) +#if G_BYTE_ORDER == G_LITTLE_ENDIAN +union _GFloatIEEE754 +{ + gfloat v_float; + struct { + guint mantissa : 23; + guint biased_exponent : 8; + guint sign : 1; + } mpn; +}; +union _GDoubleIEEE754 +{ + gdouble v_double; + struct { + guint mantissa_low : 32; + guint mantissa_high : 20; + guint biased_exponent : 11; + guint sign : 1; + } mpn; +}; +#elif G_BYTE_ORDER == G_BIG_ENDIAN +union _GFloatIEEE754 +{ + gfloat v_float; + struct { + guint sign : 1; + guint biased_exponent : 8; + guint mantissa : 23; + } mpn; +}; +union _GDoubleIEEE754 +{ + gdouble v_double; + struct { + guint sign : 1; + guint biased_exponent : 11; + guint mantissa_high : 20; + guint mantissa_low : 32; + } mpn; +}; +#else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */ +#error unknown ENDIAN type +#endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */ + +G_END_DECLS + +#endif /* __G_TYPES_H__ */ + |