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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 | ** | |
8 | ** The pForth software code is dedicated to the public domain, | |
9 | ** and any third party may reproduce, distribute and modify | |
10 | ** the pForth software code or any derivative works thereof | |
11 | ** without any compensation or license. The pForth software | |
12 | ** code is provided on an "as is" basis without any warranty | |
13 | ** of any kind, including, without limitation, the implied | |
14 | ** warranties of merchantability and fitness for a particular | |
15 | ** purpose and their equivalents under the laws of any jurisdiction. | |
16 | ** | |
17 | ***************************************************************/ | |
18 | ||
19 | #include "pf_all.h" | |
20 | ||
21 | extern CFunc0 CustomFunctionTable[]; | |
22 | ||
23 | /***************************************************************/ | |
24 | cell_t CallUserFunction( cell_t Index, int32_t ReturnMode, int32_t NumParams ) | |
25 | { | |
26 | cell_t P1, P2, P3, P4, P5; | |
27 | cell_t Result = 0; | |
28 | CFunc0 CF; | |
29 | ||
30 | DBUG(("CallUserFunction: Index = %d, ReturnMode = %d, NumParams = %d\n", | |
31 | Index, ReturnMode, NumParams )); | |
32 | ||
33 | CF = CustomFunctionTable[Index]; | |
34 | ||
35 | switch( NumParams ) | |
36 | { | |
37 | case 0: | |
38 | Result = ((CFunc0) CF) ( ); | |
39 | break; | |
40 | case 1: | |
41 | P1 = POP_DATA_STACK; | |
42 | Result = ((CFunc1) CF) ( P1 ); | |
43 | break; | |
44 | case 2: | |
45 | P2 = POP_DATA_STACK; | |
46 | P1 = POP_DATA_STACK; | |
47 | Result = ((CFunc2) CF) ( P1, P2 ); | |
48 | break; | |
49 | case 3: | |
50 | P3 = POP_DATA_STACK; | |
51 | P2 = POP_DATA_STACK; | |
52 | P1 = POP_DATA_STACK; | |
53 | Result = ((CFunc3) CF) ( P1, P2, P3 ); | |
54 | break; | |
55 | case 4: | |
56 | P4 = POP_DATA_STACK; | |
57 | P3 = POP_DATA_STACK; | |
58 | P2 = POP_DATA_STACK; | |
59 | P1 = POP_DATA_STACK; | |
60 | Result = ((CFunc4) CF) ( P1, P2, P3, P4 ); | |
61 | break; | |
62 | case 5: | |
63 | P5 = POP_DATA_STACK; | |
64 | P4 = POP_DATA_STACK; | |
65 | P3 = POP_DATA_STACK; | |
66 | P2 = POP_DATA_STACK; | |
67 | P1 = POP_DATA_STACK; | |
68 | Result = ((CFunc5) CF) ( P1, P2, P3, P4, P5 ); | |
69 | break; | |
70 | default: | |
71 | pfReportError("CallUserFunction", PF_ERR_NUM_PARAMS); | |
72 | EXIT(1); | |
73 | } | |
74 | ||
75 | /* Push result on Forth stack if requested. */ | |
76 | if(ReturnMode == C_RETURNS_VALUE) PUSH_DATA_STACK( Result ); | |
77 | ||
78 | return Result; | |
79 | } | |
80 | ||
81 | #if (!defined(PF_NO_INIT)) && (!defined(PF_NO_SHELL)) | |
82 | /***************************************************************/ | |
83 | Err CreateGlueToC( const char *CName, ucell_t Index, cell_t ReturnMode, int32_t NumParams ) | |
84 | { | |
85 | ucell_t Packed; | |
86 | char FName[40]; | |
87 | ||
88 | CStringToForth( FName, CName, sizeof(FName) ); | |
89 | Packed = (Index & 0xFFFF) | 0 | (NumParams << 24) | | |
90 | (ReturnMode << 31); | |
91 | DBUG(("Packed = 0x%8x\n", Packed)); | |
92 | ||
93 | ffCreateSecondaryHeader( FName ); | |
94 | CODE_COMMA( ID_CALL_C ); | |
95 | CODE_COMMA(Packed); | |
96 | ffFinishSecondary(); | |
97 | ||
98 | return 0; | |
99 | } | |
100 | #endif |