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8e9db35f PB |
1 | /* @(#) pf_cglue.c 98/02/11 1.4 */ |
2 | /*************************************************************** | |
3 | ** 'C' Glue support for Forth based on 'C' | |
4 | ** | |
5 | ** Author: Phil Burk | |
6 | ** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom | |
7 | ** | |
1f99f95d S |
8 | ** Permission to use, copy, modify, and/or distribute this |
9 | ** software for any purpose with or without fee is hereby granted. | |
10 | ** | |
11 | ** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL | |
12 | ** WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED | |
13 | ** WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL | |
14 | ** THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR | |
15 | ** CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING | |
16 | ** FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF | |
17 | ** CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | ** OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8e9db35f PB |
19 | ** |
20 | ***************************************************************/ | |
21 | ||
22 | #include "pf_all.h" | |
23 | ||
24 | extern CFunc0 CustomFunctionTable[]; | |
25 | ||
26 | /***************************************************************/ | |
27 | cell_t CallUserFunction( cell_t Index, int32_t ReturnMode, int32_t NumParams ) | |
28 | { | |
29 | cell_t P1, P2, P3, P4, P5; | |
30 | cell_t Result = 0; | |
31 | CFunc0 CF; | |
32 | ||
33 | DBUG(("CallUserFunction: Index = %d, ReturnMode = %d, NumParams = %d\n", | |
34 | Index, ReturnMode, NumParams )); | |
35 | ||
36 | CF = CustomFunctionTable[Index]; | |
37 | ||
38 | switch( NumParams ) | |
39 | { | |
40 | case 0: | |
41 | Result = ((CFunc0) CF) ( ); | |
42 | break; | |
43 | case 1: | |
44 | P1 = POP_DATA_STACK; | |
45 | Result = ((CFunc1) CF) ( P1 ); | |
46 | break; | |
47 | case 2: | |
48 | P2 = POP_DATA_STACK; | |
49 | P1 = POP_DATA_STACK; | |
50 | Result = ((CFunc2) CF) ( P1, P2 ); | |
51 | break; | |
52 | case 3: | |
53 | P3 = POP_DATA_STACK; | |
54 | P2 = POP_DATA_STACK; | |
55 | P1 = POP_DATA_STACK; | |
56 | Result = ((CFunc3) CF) ( P1, P2, P3 ); | |
57 | break; | |
58 | case 4: | |
59 | P4 = POP_DATA_STACK; | |
60 | P3 = POP_DATA_STACK; | |
61 | P2 = POP_DATA_STACK; | |
62 | P1 = POP_DATA_STACK; | |
63 | Result = ((CFunc4) CF) ( P1, P2, P3, P4 ); | |
64 | break; | |
65 | case 5: | |
66 | P5 = POP_DATA_STACK; | |
67 | P4 = POP_DATA_STACK; | |
68 | P3 = POP_DATA_STACK; | |
69 | P2 = POP_DATA_STACK; | |
70 | P1 = POP_DATA_STACK; | |
71 | Result = ((CFunc5) CF) ( P1, P2, P3, P4, P5 ); | |
72 | break; | |
73 | default: | |
74 | pfReportError("CallUserFunction", PF_ERR_NUM_PARAMS); | |
75 | EXIT(1); | |
76 | } | |
77 | ||
78 | /* Push result on Forth stack if requested. */ | |
79 | if(ReturnMode == C_RETURNS_VALUE) PUSH_DATA_STACK( Result ); | |
80 | ||
81 | return Result; | |
82 | } | |
83 | ||
84 | #if (!defined(PF_NO_INIT)) && (!defined(PF_NO_SHELL)) | |
85 | /***************************************************************/ | |
86 | Err CreateGlueToC( const char *CName, ucell_t Index, cell_t ReturnMode, int32_t NumParams ) | |
87 | { | |
88 | ucell_t Packed; | |
89 | char FName[40]; | |
90 | ||
91 | CStringToForth( FName, CName, sizeof(FName) ); | |
92 | Packed = (Index & 0xFFFF) | 0 | (NumParams << 24) | | |
93 | (ReturnMode << 31); | |
94 | DBUG(("Packed = 0x%8x\n", Packed)); | |
95 | ||
96 | ffCreateSecondaryHeader( FName ); | |
97 | CODE_COMMA( ID_CALL_C ); | |
98 | CODE_COMMA(Packed); | |
99 | ffFinishSecondary(); | |
100 | ||
101 | return 0; | |
102 | } | |
103 | #endif |