259 lines
7.5 KiB
C
259 lines
7.5 KiB
C
/* Various useful definitions.
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*
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* J.Cupitt, 8/4/93
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* 15/7/96 JC
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* - C++ stuff added
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifndef VIPS_UTIL_H
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#define VIPS_UTIL_H
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#ifdef __cplusplus
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extern "C" {
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#endif /*__cplusplus*/
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#include <stdio.h>
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/* Some platforms don't have M_PI :-(
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*/
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#define VIPS_PI (3.14159265358979323846)
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/* Convert degrees->rads and vice-versa.
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*/
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#define VIPS_RAD( R ) (((R) / 360.0) * 2.0 * VIPS_PI)
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#define VIPS_DEG( A ) (((A) / (2.0 * VIPS_PI)) * 360.0)
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#define VIPS_MAX( A, B ) ((A) > (B) ? (A) : (B))
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#define VIPS_MIN( A, B ) ((A) < (B) ? (A) : (B))
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#define VIPS_ABS( X ) (((X) >= 0) ? (X) : -(X))
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#define VIPS_CLIP( A, V, B ) VIPS_MAX( (A), VIPS_MIN( (B), (V) ) )
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#define VIPS_NUMBER( R ) ((int) (sizeof(R) / sizeof(R[0])))
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#define VIPS_SWAP( TYPE, A, B ) \
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G_STMT_START { \
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TYPE t = (A); \
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(A) = (B); \
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(B) = t; \
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} G_STMT_END
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/* Duff's device. Do OPERation N times in a 16-way unrolled loop.
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*/
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#define VIPS_UNROLL( N, OPER ) \
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G_STMT_START { \
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if( (N) ) { \
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int duff_count = ((N) + 15) / 16; \
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\
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switch( (N) % 16 ) { \
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case 0: do { OPER; \
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case 15: OPER; \
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case 14: OPER; \
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case 13: OPER; \
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case 12: OPER; \
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case 11: OPER; \
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case 10: OPER; \
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case 9: OPER; \
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case 8: OPER; \
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case 7: OPER; \
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case 6: OPER; \
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case 5: OPER; \
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case 4: OPER; \
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case 3: OPER; \
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case 2: OPER; \
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case 1: OPER; \
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} while( --duff_count > 0 ); \
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} \
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} \
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} G_STMT_END
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/* Round a float to the nearest integer. Much faster than rint().
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*/
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#define VIPS_RINT( R ) ((int) ((R) > 0 ? ((R) + 0.5) : ((R) - 0.5)))
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/* Various integer range clips. Record over/under flows.
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*/
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#define VIPS_CLIP_UCHAR( V, SEQ ) \
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G_STMT_START { \
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if( (V) < 0 ) { \
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(SEQ)->underflow++; \
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(V) = 0; \
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} \
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else if( (V) > UCHAR_MAX ) { \
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(SEQ)->overflow++; \
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(V) = UCHAR_MAX; \
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} \
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} G_STMT_END
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#define VIPS_CLIP_CHAR( V, SEQ ) \
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G_STMT_START { \
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if( (V) < SCHAR_MIN ) { \
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(SEQ)->underflow++; \
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(V) = SCHAR_MIN; \
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} \
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else if( (V) > SCHAR_MAX ) { \
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(SEQ)->overflow++; \
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(V) = SCHAR_MAX; \
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} \
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} G_STMT_END
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#define VIPS_CLIP_USHORT( V, SEQ ) \
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G_STMT_START { \
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if( (V) < 0 ) { \
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(SEQ)->underflow++; \
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(V) = 0; \
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} \
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else if( (V) > USHRT_MAX ) { \
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(SEQ)->overflow++; \
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(V) = USHRT_MAX; \
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} \
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} G_STMT_END
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#define VIPS_CLIP_SHORT( V, SEQ ) \
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G_STMT_START { \
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if( (V) < SHRT_MIN ) { \
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(SEQ)->underflow++; \
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(V) = SHRT_MIN; \
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} \
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else if( (V) > SHRT_MAX ) { \
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(SEQ)->overflow++; \
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(V) = SHRT_MAX; \
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} \
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} G_STMT_END
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#define VIPS_CLIP_NONE( V, SEQ ) {}
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const char *vips_enum_string( GType enm, int value );
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const char *vips_enum_nick( GType enm, int value );
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gboolean vips_slist_equal( GSList *l1, GSList *l2 );
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void *vips_slist_map2( GSList *list, VipsSListMap2Fn fn, void *a, void *b );
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void *vips_slist_map2_rev( GSList *list, VipsSListMap2Fn fn, void *a, void *b );
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void *vips_slist_map4( GSList *list,
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VipsSListMap4Fn fn, void *a, void *b, void *c, void *d );
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void *vips_slist_fold2( GSList *list, void *start,
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VipsSListFold2Fn fn, void *a, void *b );
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GSList *vips_slist_filter( GSList *list, VipsSListMap2Fn fn, void *a, void *b );
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void vips_slist_free_all( GSList *list );
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void *vips_map_equal( void *a, void *b );
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void *vips_hash_table_map( GHashTable *hash,
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VipsSListMap2Fn fn, void *a, void *b );
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char *vips_strncpy( char *dest, const char *src, int n );
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char *vips_strrstr( const char *haystack, const char *needle );
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gboolean vips_ispostfix( const char *a, const char *b );
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gboolean vips_isprefix( const char *a, const char *b );
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char *vips_break_token( char *str, const char *brk );
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int vips_vsnprintf( char *str, size_t size, const char *format, va_list ap );
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int vips_snprintf( char *str, size_t size, const char *format, ... )
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__attribute__((format(printf, 3, 4)));
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void vips_filename_split( const char *path, char *name, char *mode );
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const char *vips_skip_dir( const char *filename );
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void vips_filename_suffix( const char *path, char *suffix );
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int vips_filename_suffix_match( const char *path, const char *suffixes[] );
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char *vips_getnextoption( char **in );
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char *vips_getsuboption( const char *buf );
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gint64 vips_file_length( int fd );
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int vips__write( int fd, const void *buf, size_t count );
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FILE *vips__file_open_read( const char *filename,
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const char *fallback_dir, gboolean text_mode );
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FILE *vips__file_open_write( const char *filename,
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gboolean text_mode );
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char *vips__file_read( FILE *fp, const char *name, unsigned int *length_out );
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char *vips__file_read_name( const char *name, const char *fallback_dir,
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unsigned int *length_out );
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int vips__file_write( void *data, size_t size, size_t nmemb, FILE *stream );
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int vips__get_bytes( const char *filename, unsigned char buf[], int len );
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GValue *vips__gvalue_ref_string_new( const char *text );
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void vips__gslist_gvalue_free( GSList *list );
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GSList *vips__gslist_gvalue_copy( const GSList *list );
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GSList *vips__gslist_gvalue_merge( GSList *a, const GSList *b );
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char *vips__gslist_gvalue_get( const GSList *list );
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int vips__seek( int fd, gint64 pos );
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int vips__ftruncate( int fd, gint64 pos );
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int vips_existsf( const char *name, ... )
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__attribute__((format(printf, 1, 2)));
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int vips_mkdirf( const char *name, ... )
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__attribute__((format(printf, 1, 2)));
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FILE *vips_popenf( const char *fmt, const char *mode, ... )
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__attribute__((format(printf, 1, 3)));
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/**
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* VipsToken:
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* @VIPS_TOKEN_LEFT: left bracket
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* @VIPS_TOKEN_RIGHT: right bracket
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* @VIPS_TOKEN_STRING: string constant
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* @VIPS_TOKEN_EQUALS: equals sign
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* @VIPS_TOKEN_COMMA: comma
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*
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* Tokens returned by the vips lexical analyzer, see vips__token_get(). This
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* is used to parse option strings for arguments.
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*
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* Left and right brackets can be any of (, {, [, <.
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*
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* Strings may be in double quotes, and may contain escaped quote characters,
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* for example string, "string" and "str\"ing".
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*
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*/
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typedef enum {
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VIPS_TOKEN_LEFT = 1,
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VIPS_TOKEN_RIGHT,
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VIPS_TOKEN_STRING,
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VIPS_TOKEN_EQUALS,
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VIPS_TOKEN_COMMA
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} VipsToken;
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const char *vips__token_get( const char *buffer,
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VipsToken *token, char *string, int size );
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const char *vips__token_must( const char *buffer, VipsToken *token,
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char *string, int size );
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const char *vips__token_need( const char *buffer, VipsToken need_token,
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char *string, int size );
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const char *vips__find_rightmost_brackets( const char *p );
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int vips_ispoweroftwo( int p );
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int vips_amiMSBfirst( void );
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char *vips__temp_name( const char *format );
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void vips__change_suffix( const char *name, char *out, int mx,
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const char *new_suff, const char **olds, int nolds );
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#ifdef __cplusplus
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}
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#endif /*__cplusplus*/
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#endif /*VIPS_UTIL_H*/
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