2ee739cc |
1 | #pragma force_top_level |
2 | #pragma include_only_once |
3 | |
4 | /* math.h: ANSI 'C' (X3J11 Oct 88) library header, section 4.5 */ |
5 | /* Copyright (C) Codemist Ltd. */ |
6 | /* Copyright (C) Acorn Computers Ltd. 1991 */ |
7 | /* version 0.02 */ |
8 | |
9 | #ifndef __math_h |
10 | #define __math_h |
11 | |
12 | #ifndef HUGE_VAL |
13 | #define HUGE_VAL __huge_val |
14 | |
15 | #ifdef __cplusplus |
16 | #define HUGE __huge_val |
17 | extern "C" { |
18 | #endif |
19 | |
20 | #ifdef _DLL |
21 | extern const double *_dll_huge_val(void); |
22 | #define __huge_val (*_dll_huge_val()) |
23 | #else |
24 | extern const double __huge_val; |
25 | #endif |
26 | |
27 | #ifdef __cplusplus |
28 | } |
29 | #endif |
30 | |
31 | #endif |
32 | |
33 | #pragma no_side_effects |
34 | |
35 | #ifdef __cplusplus |
36 | extern "C" { |
37 | #endif |
38 | extern double acos(double /*x*/); |
39 | /* computes the principal value of the arc cosine of x */ |
40 | /* a domain error occurs for arguments not in the range -1 to 1 */ |
41 | /* Returns: the arc cosine in the range 0 to Pi. */ |
42 | extern double asin(double /*x*/); |
43 | /* computes the principal value of the arc sine of x */ |
44 | /* a domain error occurs for arguments not in the range -1 to 1 */ |
45 | /* and -HUGE_VAL is returned. */ |
46 | /* Returns: the arc sine in the range -Pi/2 to Pi/2. */ |
47 | extern double atan(double /*x*/); |
48 | /* computes the principal value of the arc tangent of x */ |
49 | /* Returns: the arc tangent in the range -Pi/2 to Pi/2. */ |
50 | extern double atan2(double /*x*/, double /*y*/); |
51 | /* computes the principal value of the arc tangent of y/x, using the */ |
52 | /* signs of both arguments to determine the quadrant of the return value */ |
53 | /* a domain error occurs if both args are zero, and -HUGE_VAL returned. */ |
54 | /* Returns: the arc tangent of y/x, in the range -Pi to Pi. */ |
55 | |
56 | extern double __d_atan(double); |
57 | #define atan(x) __d_atan(x) |
58 | |
59 | extern double cos(double /*x*/); |
60 | /* computes the cosine of x (measured in radians). A large magnitude */ |
61 | /* argument may yield a result with little or no significance */ |
62 | /* Returns: the cosine value. */ |
63 | extern double sin(double /*x*/); |
64 | /* computes the sine of x (measured in radians). A large magnitude */ |
65 | /* argument may yield a result with little or no significance */ |
66 | /* Returns: the sine value. */ |
67 | |
68 | extern double __d_sin(double); |
69 | extern double __d_cos(double); |
70 | #define sin(x) __d_sin(x) |
71 | #define cos(x) __d_cos(x) |
72 | |
73 | extern double tan(double /*x*/); |
74 | /* computes the tangent of x (measured in radians). A large magnitude */ |
75 | /* argument may yield a result with little or no significance */ |
76 | /* Returns: the tangent value. */ |
77 | /* if range error; returns HUGE_VAL. */ |
78 | |
79 | extern double cosh(double /*x*/); |
80 | /* computes the hyperbolic cosine of x. A range error occurs if the */ |
81 | /* magnitude of x is too large. */ |
82 | /* Returns: the hyperbolic cosine value. */ |
83 | /* if range error; returns HUGE_VAL. */ |
84 | extern double sinh(double /*x*/); |
85 | /* computes the hyperbolic sine of x. A range error occurs if the */ |
86 | /* magnitude of x is too large. */ |
87 | /* Returns: the hyperbolic sine value. */ |
88 | /* if range error; returns -HUGE_VAL or HUGE_VAL depending */ |
89 | /* on the sign of the argument */ |
90 | extern double tanh(double /*x*/); |
91 | /* computes the hyperbolic tangent of x. */ |
92 | /* Returns: the hyperbolic tangent value. */ |
93 | |
94 | extern double exp(double /*x*/); |
95 | /* computes the exponential function of x. A range error occurs if the */ |
96 | /* magnitude of x is too large. */ |
97 | /* Returns: the exponential value. */ |
98 | /* if underflow range error; 0 is returned. */ |
99 | /* if overflow range error; HUGE_VAL is returned. */ |
100 | extern double frexp(double /*value*/, int * /*exp*/); |
101 | /* breaks a floating-point number into a normalised fraction and an */ |
102 | /* integral power of 2. It stores the integer in the int object pointed */ |
103 | /* to by exp. */ |
104 | /* Returns: the value x, such that x is a double with magnitude in the */ |
105 | /* interval 0.5 to 1.0 or zero, and value equals x times 2 raised to the */ |
106 | /* power *exp. If value is zero, both parts of the result are zero. */ |
107 | extern double ldexp(double /*x*/, int /*exp*/); |
108 | /* multiplies a floating-point number by an integral power of 2. */ |
109 | /* A range error may occur. */ |
110 | /* Returns: the value of x times 2 raised to the power of exp. */ |
111 | /* if range error; HUGE_VAL is returned. */ |
112 | extern double log(double /*x*/); |
113 | /* computes the natural logarithm of x. A domain error occurs if the */ |
114 | /* argument is negative, and -HUGE_VAL is returned. A range error occurs */ |
115 | /* if the argument is zero. */ |
116 | /* Returns: the natural logarithm. */ |
117 | /* if range error; -HUGE_VAL is returned. */ |
118 | extern double log10(double /*x*/); |
119 | /* computes the base-ten logarithm of x. A domain error occurs if the */ |
120 | /* argument is negative. A range error occurs if the argument is zero. */ |
121 | /* Returns: the base-ten logarithm. */ |
122 | extern double modf(double /*value*/, double * /*iptr*/); |
123 | /* breaks the argument value into integral and fraction parts, each of */ |
124 | /* which has the same sign as the argument. It stores the integral part */ |
125 | /* as a double in the object pointed to by iptr. */ |
126 | /* Returns: the signed fractional part of value. */ |
127 | |
128 | extern double pow(double /*x*/, double /*y*/); |
129 | /* computes x raised to the power of y. A domain error occurs if x is */ |
130 | /* zero and y is less than or equal to zero, or if x is negative and y */ |
131 | /* is not an integer, and -HUGE_VAL returned. A range error may occur. */ |
132 | /* Returns: the value of x raised to the power of y. */ |
133 | /* if underflow range error; 0 is returned. */ |
134 | /* if overflow range error; HUGE_VAL is returned. */ |
135 | extern double sqrt(double /*x*/); |
136 | /* computes the non-negative square root of x. A domain error occurs */ |
137 | /* if the argument is negative, and -HUGE_VAL returned. */ |
138 | /* Returns: the value of the square root. */ |
139 | |
140 | extern double ceil(double /*x*/); |
141 | /* computes the smallest integer not less than x. */ |
142 | /* Returns: the smallest integer not less than x, expressed as a double. */ |
143 | extern double fabs(double /*x*/); |
144 | /* computes the absolute value of the floating-point number x. */ |
145 | /* Returns: the absolute value of x. */ |
146 | extern double floor(double /*d*/); |
147 | /* computes the largest integer not greater than x. */ |
148 | /* Returns: the largest integer not greater than x, expressed as a double */ |
149 | extern double fmod(double /*x*/, double /*y*/); |
150 | /* computes the floating-point remainder of x/y. */ |
151 | /* Returns: the value x - i * y, for some integer i such that, if y is */ |
152 | /* nonzero, the result has the same sign as x and magnitude */ |
153 | /* less than the magnitude of y. If y is zero, a domain error */ |
154 | /* occurs and -HUGE_VAL is returned. */ |
155 | |
156 | extern double __d_abs(double); |
157 | #define fabs(x) __d_abs(x) |
158 | |
159 | #ifdef __cplusplus |
160 | } |
161 | #endif |
162 | |
163 | #pragma side_effects |
164 | |
165 | #endif |
166 | |
167 | /* end of math.h */ |