NetSurf
utils.h
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1/*
2 * Copyright 2004-2007 James Bursa <bursa@users.sourceforge.net>
3 * Copyright 2004 John Tytgat <joty@netsurf-browser.org>
4 *
5 * This file is part of NetSurf, http://www.netsurf-browser.org/
6 *
7 * NetSurf is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * NetSurf 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.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20/**
21 * \file
22 * \brief Interface to a number of general purpose functionality.
23 * \todo Many of these functions and macros should have their own headers.
24 */
25
26#ifndef NETSURF_UTILS_UTILS_H
27#define NETSURF_UTILS_UTILS_H
28
29#include <stdbool.h>
30
31#ifndef NOF_ELEMENTS
32#define NOF_ELEMENTS(array) (sizeof(array)/sizeof(*(array)))
33#endif
34
35#ifndef ABS
36#define ABS(x) (((x)>0)?(x):(-(x)))
37#endif
38
39#ifdef __MINT__ /* avoid using GCCs builtin min/max functions */
40#undef min
41#undef max
42#endif
43
44#ifndef __cplusplus
45#ifndef min
46#define min(x,y) (((x)<(y))?(x):(y))
47#endif
48
49#ifndef max
50#define max(x,y) (((x)>(y))?(x):(y))
51#endif
52
53#ifndef clamp
54#define clamp(x,low,high) (min(max((x),(low)),(high)))
55#endif
56#endif
57
58/* Windows does not have POSIX mkdir so work around that */
59#if defined(_WIN32)
60/** windows mkdir function */
61#define nsmkdir(dir, mode) mkdir((dir))
62#else
63/** POSIX mkdir function */
64#define nsmkdir(dir, mode) mkdir((dir), (mode))
65#endif
66
67#if defined(__GNUC__) && (__GNUC__ < 3)
68#define FLEX_ARRAY_LEN_DECL 0
69#else
70#define FLEX_ARRAY_LEN_DECL
71#endif
72
73#if defined(__HAIKU__) || defined(__BEOS__)
74#include <stdlib.h>
75#define strtof(s,p) ((float)(strtod((s),(p))))
76#endif
77
78#if !defined(ceilf) && defined(__MINT__)
79#define ceilf(x) (float)ceil((double)x)
80#endif
81
82/**
83 * Calculate length of constant C string.
84 *
85 * \param x a constant C string.
86 * \return The length of C string without its terminator.
87 */
88#define SLEN(x) (sizeof((x)) - 1)
89
90
91/**
92 * Check if a directory exists.
93 */
94bool is_dir(const char *path);
95
96/**
97 * switch fall through
98 */
99#if defined __cplusplus && defined __has_cpp_attribute
100 #if __has_cpp_attribute(fallthrough) && __cplusplus >= __has_cpp_attribute(fallthrough)
101 #define fallthrough [[fallthrough]]
102 #elif __has_cpp_attribute(gnu::fallthrough) && __STDC_VERSION__ >= __has_cpp_attribute(gnu::fallthrough)
103 #define fallthrough [[gnu::fallthrough]]
104 #elif __has_cpp_attribute(clang::fallthrough) && __STDC_VERSION__ >= __has_cpp_attribute(clang::fallthrough)
105 #define fallthrough [[clang::fallthrough]]
106 #endif
107#elif defined __STDC_VERSION__ && defined __has_c_attribute
108 #if __has_c_attribute(fallthrough) && __STDC_VERSION__ >= __has_c_attribute(fallthrough)
109 #define fallthrough [[fallthrough]]
110 #endif
111#endif
112#if !defined fallthrough && defined __has_attribute
113 #if __has_attribute(__fallthrough__)
114 #define fallthrough __attribute__((__fallthrough__))
115 #endif
116#endif
117#if !defined fallthrough
118/* early gcc and clang have no implicit fallthrough warning */
119 #define fallthrough do {} while(0)
120#endif
121
122
123#endif
bool is_dir(const char *path)
Check if a directory exists.
Definition: utils.c:94
static nserror path(const struct redraw_context *ctx, const plot_style_t *pstyle, const float *p, unsigned int n, const float transform[6])
Plots a path.
Definition: plot.c:821