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/* Various useful definitions.
*
* J.Cupitt, 8/4/93
* 15/7/96 JC
* - C++ stuff added
*/
/*
This file is part of VIPS.
VIPS 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 program 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 program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifndef VIPS_UTIL_H
#define VIPS_UTIL_H
#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/
#include <math.h>
/* Some platforms don't have M_PI :-(
*/
#define VIPS_PI (3.14159265358979323846)
/* Convert degrees->rads and vice-versa.
*/
#define VIPS_RAD(R) (((R) / 360.0) * 2.0 * VIPS_PI)
#define VIPS_DEG(A) (((A) / (2.0 * VIPS_PI)) * 360.0)
#define VIPS_MAX(A, B) ((A) > (B) ? (A) : (B))
#define VIPS_MIN(A, B) ((A) < (B) ? (A) : (B))
#define VIPS_FMAX(A, B) fmax((A), (B)) VIPS_DEPRECATED_MACRO_FOR(fmax)
#define VIPS_FMIN(A, B) fmin((A), (B)) VIPS_DEPRECATED_MACRO_FOR(fmin)
#define VIPS_CLIP(A, V, B) VIPS_MAX((A), VIPS_MIN((B), (V)))
#define VIPS_FCLIP(A, V, B) fmax((A), fmin((B), (V)))
#define VIPS_NUMBER(R) ((int) (sizeof(R) / sizeof(R[0])))
#define VIPS_ABS(V) (((V) >= 0) ? (V) : -(V))
#define VIPS_FABS(V) fabs((V)) VIPS_DEPRECATED_MACRO_FOR(fabs)
// is something (eg. a pointer) N aligned
#define VIPS_ALIGNED(P, N) ((((guint64) (P)) & ((N) - 1)) == 0)
#define VIPS_ISNAN(V) isnan(V) VIPS_DEPRECATED_MACRO_FOR(isnan)
#define VIPS_FLOOR(V) floor(V) VIPS_DEPRECATED_MACRO_FOR(floor)
#define VIPS_CEIL(V) ceil(V) VIPS_DEPRECATED_MACRO_FOR(ceil)
#define VIPS_RINT(V) rint(V) VIPS_DEPRECATED_MACRO_FOR(rint)
#define VIPS_ROUND(V) round(V) VIPS_DEPRECATED_MACRO_FOR(round)
/* Testing status before the function call saves a lot of time.
*/
#define VIPS_ONCE(ONCE, FUNC, CLIENT) \
G_STMT_START \
{ \
if (G_UNLIKELY((ONCE)->status != G_ONCE_STATUS_READY)) \
(void) g_once(ONCE, FUNC, CLIENT); \
} \
G_STMT_END
/* rint() does "bankers rounding", it rounds to the nearest even integer.
* For things like image geometry, we want strict nearest int.
*
* If you know it's unsigned, _UINT is a little faster.
*/
#define VIPS_ROUND_INT(R) ((int) ((R) > 0 ? ((R) + 0.5) : ((R) -0.5)))
#define VIPS_ROUND_UINT(R) ((int) ((R) + 0.5))
/* Round N down and up to the nearest multiple of P.
*/
#define VIPS_ROUND_DOWN(N, P) ((N) - ((N) % (P)))
#define VIPS_ROUND_UP(N, P) (VIPS_ROUND_DOWN((N) + (P) -1, (P)))
#define VIPS_SWAP(TYPE, A, B) \
G_STMT_START \
{ \
TYPE t = (A); \
(A) = (B); \
(B) = t; \
} \
G_STMT_END
/* Duff's device. Do OPERation N times in a 16-way unrolled loop.
*/
#define VIPS_UNROLL(N, OPER) \
G_STMT_START \
{ \
if ((N)) { \
int duff_count = ((N) + 15) / 16; \
\
switch ((N) % 16) { \
case 0: \
do { \
OPER; \
case 15: \
OPER; \
case 14: \
OPER; \
case 13: \
OPER; \
case 12: \
OPER; \
case 11: \
OPER; \
case 10: \
OPER; \
case 9: \
OPER; \
case 8: \
OPER; \
case 7: \
OPER; \
case 6: \
OPER; \
case 5: \
OPER; \
case 4: \
OPER; \
case 3: \
OPER; \
case 2: \
OPER; \
case 1: \
OPER; \
} while (--duff_count > 0); \
} \
} \
} \
G_STMT_END
/* Various integer range clips. Record over/under flows.
*/
#define VIPS_CLIP_UCHAR(V, SEQ) \
G_STMT_START \
{ \
if ((V) < 0) { \
(SEQ)->underflow++; \
(V) = 0; \
} \
else if ((V) > UCHAR_MAX) { \
(SEQ)->overflow++; \
(V) = UCHAR_MAX; \
} \
} \
G_STMT_END
#define VIPS_CLIP_CHAR(V, SEQ) \
G_STMT_START \
{ \
if ((V) < SCHAR_MIN) { \
(SEQ)->underflow++; \
(V) = SCHAR_MIN; \
} \
else if ((V) > SCHAR_MAX) { \
(SEQ)->overflow++; \
(V) = SCHAR_MAX; \
} \
} \
G_STMT_END
#define VIPS_CLIP_USHORT(V, SEQ) \
G_STMT_START \
{ \
if ((V) < 0) { \
(SEQ)->underflow++; \
(V) = 0; \
} \
else if ((V) > USHRT_MAX) { \
(SEQ)->overflow++; \
(V) = USHRT_MAX; \
} \
} \
G_STMT_END
#define VIPS_CLIP_SHORT(V, SEQ) \
G_STMT_START \
{ \
if ((V) < SHRT_MIN) { \
(SEQ)->underflow++; \
(V) = SHRT_MIN; \
} \
else if ((V) > SHRT_MAX) { \
(SEQ)->overflow++; \
(V) = SHRT_MAX; \
} \
} \
G_STMT_END
#define VIPS_CLIP_UINT(V, SEQ) \
G_STMT_START \
{ \
if ((V) < 0) { \
(SEQ)->underflow++; \
(V) = 0; \
} \
} \
G_STMT_END
#define VIPS_CLIP_NONE(V, SEQ) \
{ \
}
/* Not all platforms have PATH_MAX (eg. Hurd) and we don't need a platform one
* anyway, just a static buffer big enough for almost any path.
*/
#define VIPS_PATH_MAX (4096)
/* Create multiple copies of a function targeted at groups of SIMD intrinsics,
* with the most suitable selected at runtime via dynamic dispatch.
*/
#ifdef HAVE_TARGET_CLONES
#define VIPS_TARGET_CLONES(TARGETS) \
__attribute__((target_clones(TARGETS)))
#else
#define VIPS_TARGET_CLONES(TARGETS)
#endif
VIPS_API
const char *vips_enum_string(GType enm, int value);
VIPS_API
const char *vips_enum_nick(GType enm, int value);
VIPS_API
int vips_enum_from_nick(const char *domain, GType type, const char *str);
VIPS_API
int vips_flags_from_nick(const char *domain, GType type, const char *nick);
VIPS_API
gboolean vips_slist_equal(GSList *l1, GSList *l2);
VIPS_API
void *vips_slist_map2(GSList *list, VipsSListMap2Fn fn, void *a, void *b);
VIPS_API
void *vips_slist_map2_rev(GSList *list, VipsSListMap2Fn fn, void *a, void *b);
VIPS_API
void *vips_slist_map4(GSList *list,
VipsSListMap4Fn fn, void *a, void *b, void *c, void *d);
VIPS_API
void *vips_slist_fold2(GSList *list, void *start,
VipsSListFold2Fn fn, void *a, void *b);
VIPS_API
GSList *vips_slist_filter(GSList *list, VipsSListMap2Fn fn, void *a, void *b);
VIPS_API
void vips_slist_free_all(GSList *list);
VIPS_API
void *vips_map_equal(void *a, void *b);
VIPS_API
void *vips_hash_table_map(GHashTable *hash,
VipsSListMap2Fn fn, void *a, void *b);
VIPS_API
gboolean vips_iscasepostfix(const char *a, const char *b);
VIPS_API
gboolean vips_isprefix(const char *a, const char *b);
VIPS_API
char *vips_break_token(char *str, const char *brk);
VIPS_API
int vips_filename_suffix_match(const char *path, const char *suffixes[]);
VIPS_API
gint64 vips_file_length(int fd);
VIPS_API
int vips_existsf(const char *name, ...)
G_GNUC_PRINTF(1, 2);
VIPS_API
int vips_isdirf(const char *name, ...)
G_GNUC_PRINTF(1, 2);
VIPS_API
int vips_mkdirf(const char *name, ...)
G_GNUC_PRINTF(1, 2);
VIPS_API
int vips_rmdirf(const char *name, ...)
G_GNUC_PRINTF(1, 2);
VIPS_API
int vips_rename(const char *old_name, const char *new_name);
/**
* VipsToken: (skip)
* @VIPS_TOKEN_LEFT: left bracket
* @VIPS_TOKEN_RIGHT: right bracket
* @VIPS_TOKEN_STRING: string constant
* @VIPS_TOKEN_EQUALS: equals sign
* @VIPS_TOKEN_COMMA: comma
*
* Tokens returned by the vips lexical analyzer, see vips__token_get(). This
* is used to parse option strings for arguments.
*
* Left and right brackets can be any of (, {, [, <.
*
* Strings may be in double quotes, and may contain escaped quote characters,
* for example string, "string" and "str\"ing".
*/
typedef enum {
VIPS_TOKEN_LEFT = 1,
VIPS_TOKEN_RIGHT,
VIPS_TOKEN_STRING,
VIPS_TOKEN_EQUALS,
VIPS_TOKEN_COMMA
} VipsToken;
#ifndef __GI_SCANNER__
// we expose this one in the API for testing
VIPS_API
const char *vips__token_get(const char *buffer,
VipsToken *token, char *string, int size);
#endif /* !__GI_SCANNER__ */
VIPS_API
int vips_ispoweroftwo(int p);
VIPS_API
int vips_amiMSBfirst(void);
VIPS_API
char *vips_realpath(const char *path);
VIPS_API
int vips_strtod(const char *str, double *out);
#ifdef __cplusplus
}
#endif /*__cplusplus*/
#endif /*VIPS_UTIL_H*/