1 | /*****************************************************************************/ |
2 | /* */ |
3 | /* intptrstack.h */ |
4 | /* */ |
5 | /* Integer+ptr stack used for program settings */ |
6 | /* */ |
7 | /* */ |
8 | /* */ |
9 | /* (C) 2017, Mega Cat Studios */ |
10 | /* */ |
11 | /* */ |
12 | /* This software is provided 'as-is', without any expressed or implied */ |
13 | /* warranty. In no event will the authors be held liable for any damages */ |
14 | /* arising from the use of this software. */ |
15 | /* */ |
16 | /* Permission is granted to anyone to use this software for any purpose, */ |
17 | /* including commercial applications, and to alter it and redistribute it */ |
18 | /* freely, subject to the following restrictions: */ |
19 | /* */ |
20 | /* 1. The origin of this software must not be misrepresented; you must not */ |
21 | /* claim that you wrote the original software. If you use this software */ |
22 | /* in a product, an acknowledgment in the product documentation would be */ |
23 | /* appreciated but is not required. */ |
24 | /* 2. Altered source versions must be plainly marked as such, and must not */ |
25 | /* be misrepresented as being the original software. */ |
26 | /* 3. This notice may not be removed or altered from any source */ |
27 | /* distribution. */ |
28 | /* */ |
29 | /*****************************************************************************/ |
30 | |
31 | |
32 | |
33 | #ifndef INTPTRSTACK_H |
34 | #define INTPTRSTACK_H |
35 | |
36 | |
37 | |
38 | #include "inline.h" |
39 | |
40 | |
41 | |
42 | /*****************************************************************************/ |
43 | /* Data */ |
44 | /*****************************************************************************/ |
45 | |
46 | |
47 | |
48 | typedef struct IntPtrStack IntPtrStack; |
49 | struct IntPtrInner { |
50 | long val; |
51 | void *ptr; |
52 | }; |
53 | struct IntPtrStack { |
54 | unsigned Count; |
55 | struct IntPtrInner Stack[8]; |
56 | }; |
57 | |
58 | /* An initializer for an empty int stack */ |
59 | #define STATIC_INTPTRSTACK_INITIALIZER { 0, { 0, 0 }, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0} } } |
60 | |
61 | /* Declare an int stack with the given value as first element */ |
62 | #define INTPTRSTACK(Val, Ptr) { 1, { {Val, Ptr}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0} } } |
63 | |
64 | |
65 | |
66 | /*****************************************************************************/ |
67 | /* Code */ |
68 | /*****************************************************************************/ |
69 | |
70 | |
71 | |
72 | #if defined(HAVE_INLINE) |
73 | INLINE int IPS_IsFull (const IntPtrStack* S) |
74 | /* Return true if there is no space left on the given int stack */ |
75 | { |
76 | return (S->Count >= sizeof (S->Stack) / sizeof (S->Stack[0])); |
77 | } |
78 | #else |
79 | # define IPS_IsFull(S) ((S)->Count >= sizeof ((S)->Stack) / sizeof ((S)->Stack[0])) |
80 | #endif |
81 | |
82 | #if defined(HAVE_INLINE) |
83 | INLINE int IPS_IsEmpty (const IntPtrStack* S) |
84 | /* Return true if there are no values on the given int stack */ |
85 | { |
86 | return (S->Count == 0); |
87 | } |
88 | #else |
89 | # define IPS_IsEmpty(S) ((S)->Count == 0) |
90 | #endif |
91 | |
92 | #if defined(HAVE_INLINE) |
93 | INLINE unsigned IPS_GetCount (const IntPtrStack* S) |
94 | /* Return the number of elements on the given int stack */ |
95 | { |
96 | return S->Count; |
97 | } |
98 | #else |
99 | # define IPS_GetCount(S) (S)->Count |
100 | #endif |
101 | |
102 | void IPS_Get (const IntPtrStack* S, long *Val, void **Ptr); |
103 | /* Get the value on top of an int stack */ |
104 | |
105 | void IPS_Set (IntPtrStack* S, long Val, void *Ptr); |
106 | /* Set the value on top of an int stack */ |
107 | |
108 | void IPS_Drop (IntPtrStack* S); |
109 | /* Drop a value from an int stack */ |
110 | |
111 | void IPS_Push (IntPtrStack* S, long Val, void *Ptr); |
112 | /* Push a value onto an int stack */ |
113 | |
114 | void IPS_Pop (IntPtrStack* S, long *Val, void **Ptr); |
115 | /* Pop a value from an int stack */ |
116 | |
117 | |
118 | |
119 | /* End of IntPtrStack.h */ |
120 | |
121 | #endif |
122 | |