2 * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
4 * This file is part of libass.
6 * libass is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * libass is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with libass; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #ifndef LIBASS_UTILS_H
22 #define LIBASS_UTILS_H
44 #define FFMAX(a,b) ((a) > (b) ? (a) : (b))
45 #define FFMIN(a,b) ((a) > (b) ? (b) : (a))
46 #define FFMINMAX(c,a,b) FFMIN(FFMAX(c, a), b)
48 int mystrtoi(char **p
, int *res
);
49 int mystrtoll(char **p
, long long *res
);
50 int mystrtou32(char **p
, int base
, uint32_t *res
);
51 int mystrtod(char **p
, double *res
);
52 int strtocolor(ASS_Library
*library
, char **q
, uint32_t *res
, int hex
);
53 char parse_bool(char *str
);
54 unsigned ass_utf8_get_char(char **str
);
55 void ass_msg(ASS_Library
*priv
, int lvl
, char *fmt
, ...);
57 void *ass_guess_buffer_cp(ASS_Library
*library
, unsigned char *buffer
,
58 int buflen
, char *preferred_language
,
62 static inline int d6_to_int(int x
)
66 static inline int d16_to_int(int x
)
68 return (x
+ 32768) >> 16;
70 static inline int int_to_d6(int x
)
74 static inline int int_to_d16(int x
)
78 static inline int d16_to_d6(int x
)
80 return (x
+ 512) >> 10;
82 static inline int d6_to_d16(int x
)
86 static inline double d6_to_double(int x
)
90 static inline int double_to_d6(double x
)
92 return (int) (x
* 64);
94 static inline double d16_to_double(int x
)
96 return ((double) x
) / 0x10000;
98 static inline int double_to_d16(double x
)
100 return (int) (x
* 0x10000);
103 #define FNV1_32A_INIT (unsigned)0x811c9dc5
105 static inline unsigned fnv_32a_buf(void *buf
, size_t len
, unsigned hval
)
107 unsigned char *bp
= buf
;
108 unsigned char *be
= bp
+ len
;
110 hval
^= (unsigned) *bp
++;
112 (hval
<< 1) + (hval
<< 4) + (hval
<< 7) + (hval
<< 8) +
117 static inline unsigned fnv_32a_str(char *str
, unsigned hval
)
119 unsigned char *s
= (unsigned char *) str
;
121 hval
^= (unsigned) *s
++;
123 (hval
<< 1) + (hval
<< 4) + (hval
<< 7) + (hval
<< 8) +
129 #endif /* LIBASS_UTILS_H */