1 | /*****************************************************************************/ |
2 | /* */ |
3 | /* intstack.c */ |
4 | /* */ |
5 | /* Integer stack used for program settings */ |
6 | /* */ |
7 | /* */ |
8 | /* */ |
9 | /* (C) 2004-2010, Ullrich von Bassewitz */ |
10 | /* Roemerstrasse 52 */ |
11 | /* D-70794 Filderstadt */ |
12 | /* EMail: uz@cc65.org */ |
13 | /* */ |
14 | /* */ |
15 | /* This software is provided 'as-is', without any expressed or implied */ |
16 | /* warranty. In no event will the authors be held liable for any damages */ |
17 | /* arising from the use of this software. */ |
18 | /* */ |
19 | /* Permission is granted to anyone to use this software for any purpose, */ |
20 | /* including commercial applications, and to alter it and redistribute it */ |
21 | /* freely, subject to the following restrictions: */ |
22 | /* */ |
23 | /* 1. The origin of this software must not be misrepresented; you must not */ |
24 | /* claim that you wrote the original software. If you use this software */ |
25 | /* in a product, an acknowledgment in the product documentation would be */ |
26 | /* appreciated but is not required. */ |
27 | /* 2. Altered source versions must be plainly marked as such, and must not */ |
28 | /* be misrepresented as being the original software. */ |
29 | /* 3. This notice may not be removed or altered from any source */ |
30 | /* distribution. */ |
31 | /* */ |
32 | /*****************************************************************************/ |
33 | |
34 | |
35 | |
36 | /* common */ |
37 | #include "check.h" |
38 | #include "intstack.h" |
39 | |
40 | |
41 | |
42 | /*****************************************************************************/ |
43 | /* Code */ |
44 | /*****************************************************************************/ |
45 | |
46 | |
47 | |
48 | long IS_Get (const IntStack* S) |
49 | /* Get the value on top of an int stack */ |
50 | { |
51 | PRECONDITION (S->Count > 0); |
52 | return S->Stack[S->Count-1]; |
53 | } |
54 | |
55 | |
56 | |
57 | void IS_Set (IntStack* S, long Val) |
58 | /* Set the value on top of an int stack */ |
59 | { |
60 | PRECONDITION (S->Count > 0); |
61 | S->Stack[S->Count-1] = Val; |
62 | } |
63 | |
64 | |
65 | |
66 | void IS_Drop (IntStack* S) |
67 | /* Drop a value from an int stack */ |
68 | { |
69 | PRECONDITION (S->Count > 0); |
70 | --S->Count; |
71 | } |
72 | |
73 | |
74 | |
75 | void IS_Push (IntStack* S, long Val) |
76 | /* Push a value onto an int stack */ |
77 | { |
78 | PRECONDITION (S->Count < sizeof (S->Stack) / sizeof (S->Stack[0])); |
79 | S->Stack[S->Count++] = Val; |
80 | } |
81 | |
82 | |
83 | |
84 | long IS_Pop (IntStack* S) |
85 | /* Pop a value from an int stack */ |
86 | { |
87 | PRECONDITION (S->Count > 0); |
88 | return S->Stack[--S->Count]; |
89 | } |
90 | |