projects / pforth / blame
| Commit | Line | Data |
|---|---|---|
| 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 |