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973 lines
28 KiB
C
973 lines
28 KiB
C
/*
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* Copyright (c) 1987 Fujitsu
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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builtInFunctions.c -- Code for various intrinsic user callable
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functions in the Macross assembler.
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Chip Morningstar -- Lucasfilm Ltd.
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11-January-1985
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*/
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#include "macrossTypes.h"
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#include "macrossGlobals.h"
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#include "expressionSemantics.h"
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#include "operandStuff.h"
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#include "semanticMisc.h"
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#include <string.h>
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/*
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Helper routines to return values into the Macross expression evaluation
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environment
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*/
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extern void error (errorType theError, ...);
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extern int hashString (char *s);
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extern void assembleMacro (macroTableEntryType *macroInstruction, operandListType *operands);
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extern void saveListingOff (void);
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extern void saveListingOn (void);
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extern bool strcmplc (char *s1, char *s2);
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extern symbolTableEntryType *lookupOrEnterSymbol (stringType *s, symbolUsageKindType kind);
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extern void assembleDefineStatement (defineStatementBodyType *defineStatement);
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extern void freeStatement (statementType *statement);
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valueType *
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makeBooleanValue(int test)
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{
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return(newValue(ABSOLUTE_VALUE, test!=0, EXPRESSION_OPND));
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}
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valueType *
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makeFailureValue(void)
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{
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return(newValue(FAIL, 0, EXPRESSION_OPND));
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}
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valueType *
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makeIntegerValue(int integer)
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{
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return(newValue(ABSOLUTE_VALUE, integer, EXPRESSION_OPND));
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}
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valueType *
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makeOperandValue(operandType *operand)
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{
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return(newValue(OPERAND_VALUE, operand, EXPRESSION_OPND));
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}
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valueType *
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makeStringValue(stringType *string)
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{
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return(newValue(STRING_VALUE, string, STRING_OPND));
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}
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valueType *
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makeUndefinedValue(void)
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{
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return(newValue(UNDEFINED_VALUE, 0, EXPRESSION_OPND));
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}
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/*
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The built-in-functions themselves: pointers to these are loaded into the
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values of the predefined Macross symbols denoting them at assembly
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initialization time from the built-in-function table. Each symbol of the
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form "xxx" is assigned a pointer to "xxxBIF" (BIF == Built-In-Function).
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*/
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/* Return internal address mode of an operand */
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valueType *
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addressModeBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *evaluatedParameter;
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeIntegerValue(evaluatedParameter->addressMode));
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} else {
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return(makeIntegerValue(-1));
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}
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}
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/* Call a macro where the macro name is obtained dynamically from a string */
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valueType *
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applyBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *stringValue;
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stringType *macroToLookup;
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macroTableEntryType *macroToCall;
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macroTableEntryType *lookupMacroName(char *s, int hashValue);
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if (parameterList == NULL) {
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error(NO_ARGUMENTS_TO_BIF_ERROR, "apply");
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return(makeFailureValue());
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}
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stringValue = evaluateOperand(parameterList);
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if (stringValue->kindOfValue != STRING_VALUE) {
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error(BIF_ARGUMENT_IS_NOT_A_STRING_ERROR, "apply");
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return(makeFailureValue());
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}
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macroToLookup = (stringType *)stringValue->value;
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if ((macroToCall = lookupMacroName(macroToLookup,
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hashString(macroToLookup))) == 0) {
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error(APPLY_ARGUMENT_IS_NOT_MACRO_ERROR, macroToLookup);
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return(makeFailureValue());
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}
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assembleMacro(macroToCall, parameterList->nextOperand);
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return(makeBooleanValue(TRUE));
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}
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/* return the length of an array */
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valueType *
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arrayLengthBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *testObjectValue;
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if (parameterList == NULL)
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return(makeIntegerValue(0));
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testObjectValue = evaluateOperand(parameterList);
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if (testObjectValue->kindOfValue == STRING_VALUE) {
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return(makeIntegerValue(strlen(testObjectValue->value)));
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} else if (testObjectValue->kindOfValue == ARRAY_VALUE) {
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return(makeIntegerValue(((arrayType *)(testObjectValue->
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value))->arraySize));
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} else {
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return(makeIntegerValue(0));
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}
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}
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/* The two ATASCII related BIF's refer to this table -- This really only
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makes sense for the 6502 version, but is harmless in other versions. */
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static char atasciiTable[] = { /* 0xFFs will become 0x00s on output */
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
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0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
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0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
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0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
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0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
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0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0xFF,
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};
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/* Convert a string to ATASCII */
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valueType *
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atasciiBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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int i;
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valueType *stringValue;
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stringType *string;
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stringType *newString;
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if (parameterList == NULL)
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return(makeStringValue(""));
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stringValue = evaluateOperand(parameterList);
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if (stringValue->kindOfValue != STRING_VALUE) {
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error(BIF_ARGUMENT_IS_NOT_A_STRING_ERROR, "atascii");
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return(makeFailureValue());
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}
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string = (stringType *)stringValue->value;
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newString = (stringType *)malloc(strlen(string)+1);
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for (i=0; string[i]!='\0'; i++)
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newString[i] = atasciiTable[string[i]];
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newString[i] = '\0';
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return(makeStringValue(newString));
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}
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/* Convert a string to ATASCII while setting high-order color bits */
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valueType *
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atasciiColorBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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int i;
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valueType *stringValue;
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stringType *string;
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valueType *colorValue;
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int color;
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stringType *newString;
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byte testChar;
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if (parameterList == NULL)
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return(makeStringValue(""));
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stringValue = evaluateOperand(parameterList);
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parameterList = parameterList->nextOperand;
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if (parameterList == NULL) {
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color = 0;
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} else {
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colorValue = evaluateOperand(parameterList);
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if (colorValue->kindOfValue != ABSOLUTE_VALUE) {
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error(BAD_COLOR_ARGUMENT_TO_ATASCII_COLOR_ERROR);
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return(makeFailureValue());
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}
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color = colorValue->value;
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}
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color = (color & 0x03) << 6;
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if (stringValue->kindOfValue != STRING_VALUE) {
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error(BIF_ARGUMENT_IS_NOT_A_STRING_ERROR, "atasciiColor");
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return(makeFailureValue());
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}
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string = (stringType *)stringValue->value;
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newString = (stringType *)malloc(strlen(string)+1);
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for (i=0; string[i]!='\0'; i++) {
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testChar = atasciiTable[string[i]];
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if (testChar == 0xFF)
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testChar = 0;
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testChar = (testChar & 0x3F) | color;
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if (testChar == 0)
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testChar = 0xFF;
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newString[i] = testChar;
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}
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newString[i] = '\0';
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return(makeStringValue(newString));
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}
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/* Turn debug mode off and on */
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valueType *
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debugModeOffBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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debug = FALSE;
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return(makeBooleanValue(FALSE));
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}
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valueType *
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debugModeOnBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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debug = TRUE;
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return(makeBooleanValue(TRUE));
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}
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/* Turn display of code emission off and on */
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valueType *
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emitModeOffBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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emitPrint = FALSE;
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return(makeBooleanValue(FALSE));
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}
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valueType *
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emitModeOnBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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emitPrint = TRUE;
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return(makeBooleanValue(TRUE));
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}
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/* Check if an operand is absolute (as opposed to relocatable) */
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valueType *
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isAbsoluteValueBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *evaluatedParameter;
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeBooleanValue(evaluatedParameter->kindOfValue ==
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ABSOLUTE_VALUE));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if operand is code block */
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valueType *
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isBlockBIF(operandListType *parameterList, fixupKindType kindOfFixup) /* questionable */
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{
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valueType *evaluatedParameter;
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeBooleanValue(evaluatedParameter->kindOfValue ==
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BLOCK_VALUE));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if operand is a BIF */
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valueType *
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isBuiltInFunctionBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *evaluatedParameter;
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeBooleanValue(evaluatedParameter->kindOfValue ==
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BUILT_IN_FUNCTION_VALUE));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if operand is a condition code */
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valueType *
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isConditionCodeBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *evaluatedParameter;
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeBooleanValue(evaluatedParameter->kindOfValue ==
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CONDITION_VALUE));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if a symbol is defined */
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valueType *
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isDefinedBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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expressionType *expression;
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symbolInContextType *context;
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symbolInContextType *getWorkingContext(symbolTableEntryType *identifier);
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symbolTableEntryType *effectiveSymbol(symbolTableEntryType *symbol, symbolInContextType **assignmentTargetContext);
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if (parameterList != NULL) {
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if (parameterList->kindOfOperand == EXPRESSION_OPND &&
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(expression = parameterList->theOperand.
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expressionUnion) != NULL && expression->
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kindOfTerm == IDENTIFIER_EXPR &&
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effectiveSymbol(expression->expressionTerm.
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identifierUnion, &context) != NULL &&
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context != NULL && (context->value->
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kindOfValue == UNDEFINED_VALUE || context->
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value->kindOfValue == FAIL)) {
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if ((context->usage == UNKNOWN_SYMBOL || context->
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usage == NESTED_UNKNOWN_SYMBOL) &&
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context->referenceCount == 0)
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context->usage = DEAD_SYMBOL;
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return(makeBooleanValue(FALSE));
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} else {
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return(makeBooleanValue(TRUE));
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}
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if a symbol is externally visible */
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valueType *
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isExternalBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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expressionType *expression;
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symbolInContextType *context;
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symbolInContextType *getWorkingContext(symbolTableEntryType *identifier);
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if (parameterList != NULL && parameterList->kindOfOperand ==
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EXPRESSION_OPND) {
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expression = parameterList->theOperand.expressionUnion;
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return(makeBooleanValue(expression->kindOfTerm ==
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IDENTIFIER_EXPR && (context = getWorkingContext(
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expression->expressionTerm.identifierUnion))!=NULL &&
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(context->attributes & GLOBAL_ATT)!=0));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if an operand is a struct field */
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valueType *
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isFieldBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *evaluatedParameter;
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeBooleanValue(evaluatedParameter->kindOfValue ==
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FIELD_VALUE));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if an operand is a user-defined function */
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valueType *
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isFunctionBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *evaluatedParameter;
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeBooleanValue(evaluatedParameter->kindOfValue ==
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FUNCTION_VALUE));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if an operand value is relocatable */
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valueType *
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isRelocatableValueBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *evaluatedParameter;
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeBooleanValue(evaluatedParameter->kindOfValue ==
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RELOCATABLE_VALUE || evaluatedParameter->
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kindOfValue == DATA_VALUE));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if an operand is a string */
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valueType *
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isStringBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *evaluatedParameter;
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|
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeBooleanValue(evaluatedParameter->kindOfValue ==
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STRING_VALUE));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if an operand is a struct */
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valueType *
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isStructBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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valueType *evaluatedParameter;
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|
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if (parameterList != NULL) {
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evaluatedParameter = evaluateOperand(parameterList);
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return(makeBooleanValue(evaluatedParameter->kindOfValue ==
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STRUCT_VALUE));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Check if an operand is a symbol */
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valueType *
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isSymbolBIF(operandListType *parameterList, fixupKindType kindOfFixup)
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{
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expressionType *expression;
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if (parameterList != NULL && parameterList->kindOfOperand ==
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EXPRESSION_OPND) {
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expression = parameterList->theOperand.expressionUnion;
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return(makeBooleanValue(expression->kindOfTerm ==
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IDENTIFIER_EXPR));
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} else {
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return(makeBooleanValue(FALSE));
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}
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}
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/* Turn listing off and on */
|
|
valueType *
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listingOffBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
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|
if (listingOn) {
|
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if (!listingControlCounter)
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saveListingOff();
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listingControlCounter++;
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}
|
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return(makeBooleanValue(FALSE));
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}
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|
|
valueType *
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listingOnBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
if (listingOn) {
|
|
if (--listingControlCounter < 0) {
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|
listingControlCounter = 0;
|
|
return(makeBooleanValue(TRUE));
|
|
} else if (listingControlCounter) {
|
|
return(makeBooleanValue(FALSE));
|
|
} else {
|
|
saveListingOn();
|
|
return(makeBooleanValue(TRUE));
|
|
}
|
|
} else {
|
|
return(makeBooleanValue(FALSE));
|
|
}
|
|
}
|
|
|
|
/* Generate an array on the fly */
|
|
valueType *
|
|
makeArrayBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *lengthValue;
|
|
int length;
|
|
valueType *result;
|
|
valueType **arrayContents;
|
|
int i;
|
|
|
|
if (parameterList == NULL) {
|
|
error(NO_ARGUMENTS_TO_BIF_ERROR, "makeArray");
|
|
return(makeFailureValue());
|
|
}
|
|
lengthValue = evaluateOperand(parameterList);
|
|
if (lengthValue->kindOfValue != ABSOLUTE_VALUE) {
|
|
error(BIF_NTH_ARGUMENT_IS_NOT_ABSOLUTE_VALUE_ERROR,
|
|
"makeArray", 1);
|
|
return(makeFailureValue());
|
|
} else if (lengthValue->value < 0) {
|
|
error(NEGATIVE_ARRAY_SIZE_TO_MAKEARRAY_ERROR);
|
|
return(makeFailureValue());
|
|
}
|
|
length = lengthValue->value;
|
|
result = newValue(ARRAY_VALUE, allocArray(length, &arrayContents),
|
|
EXPRESSION_OPND);
|
|
parameterList = parameterList->nextOperand;
|
|
for (i=0; i<length; ++i) {
|
|
if (parameterList != NULL) {
|
|
arrayContents[i] = evaluateOperand(parameterList);
|
|
parameterList = parameterList->nextOperand;
|
|
} else {
|
|
arrayContents[i] = NULL;
|
|
}
|
|
}
|
|
if (parameterList != NULL) {
|
|
error(TOO_MANY_INITIALIZATION_ARGS_TO_MAKEARRAY_ERROR);
|
|
return(makeFailureValue());
|
|
}
|
|
return(result);
|
|
}
|
|
|
|
/* Return the Nth character of a string (as an integer) */
|
|
valueType *
|
|
nthCharBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *positionValue;
|
|
int position;
|
|
valueType *stringValue;
|
|
stringType *string;
|
|
|
|
|
|
if (parameterList == NULL)
|
|
return(makeFailureValue());
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_ARGUMENT_IS_NOT_A_STRING_ERROR, "nthChar");
|
|
return(makeFailureValue());
|
|
}
|
|
parameterList = parameterList->nextOperand;
|
|
if (parameterList == NULL) {
|
|
position = 0;
|
|
} else {
|
|
positionValue = evaluateOperand(parameterList);
|
|
if (positionValue->kindOfValue != ABSOLUTE_VALUE) {
|
|
error(BAD_POSITION_ARGUMENT_TO_NTH_CHAR_ERROR);
|
|
return(makeFailureValue());
|
|
}
|
|
position = positionValue->value;
|
|
}
|
|
|
|
string = (stringType *)stringValue->value;
|
|
if (position >= strlen(string)) {
|
|
error(BAD_POSITION_ARGUMENT_TO_NTH_CHAR_ERROR);
|
|
return(makeFailureValue());
|
|
}
|
|
return(makeIntegerValue(string[position]));
|
|
}
|
|
|
|
/* Pass stuff through to stdio's 'printf' function */
|
|
valueType *
|
|
printfBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
stringType *formatString;
|
|
valueType *stringValue;
|
|
int argumentCount;
|
|
int argument[20];
|
|
valueType *result;
|
|
|
|
|
|
result = makeFailureValue();
|
|
if (parameterList != NULL) {
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(PRINTF_FORMAT_IS_NOT_A_STRING_ERROR);
|
|
return(result);
|
|
}
|
|
formatString = (stringType *)stringValue->value;
|
|
parameterList = parameterList->nextOperand;
|
|
argumentCount = 0;
|
|
while (parameterList != NULL && argumentCount < 20) {
|
|
argument[argumentCount++] = evaluateOperand(
|
|
parameterList)->value;
|
|
parameterList = parameterList->nextOperand;
|
|
}
|
|
/* cretinous hack */
|
|
printf(formatString, argument[0], argument[1], argument[2],
|
|
argument[3], argument[4], argument[5], argument[6],
|
|
argument[7], argument[8], argument[9], argument[10],
|
|
argument[11], argument[12], argument[13],
|
|
argument[14], argument[15], argument[16],
|
|
argument[17], argument[18], argument[19]);
|
|
}
|
|
return(result);
|
|
}
|
|
|
|
/* Concatenate two strings */
|
|
valueType *
|
|
strcatBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *stringValue;
|
|
stringType *string1;
|
|
stringType *string2;
|
|
stringType *newString;
|
|
|
|
if (parameterList == NULL)
|
|
return(makeStringValue(""));
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_NTH_ARGUMENT_IS_NOT_A_STRING_ERROR, "strcat", 1);
|
|
return(makeFailureValue());
|
|
}
|
|
string1 = (stringType *)stringValue->value;
|
|
parameterList = parameterList->nextOperand;
|
|
if (parameterList == NULL)
|
|
return(makeStringValue(string1));
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_NTH_ARGUMENT_IS_NOT_A_STRING_ERROR, "strcat", 2);
|
|
return(makeFailureValue());
|
|
}
|
|
string2 = (stringType *)stringValue->value;
|
|
newString = (stringType *)malloc(strlen(string1)+strlen(string2)+1);
|
|
strcpy(newString, string1);
|
|
strcat(newString, string2);
|
|
return(makeStringValue(newString));
|
|
}
|
|
|
|
/* Compare two strings */
|
|
valueType *
|
|
strcmpBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *stringValue;
|
|
stringType *string1;
|
|
stringType *string2;
|
|
stringType *newString;
|
|
|
|
if (parameterList == NULL) {
|
|
error(NO_ARGUMENTS_TO_BIF_ERROR, "strcmp");
|
|
return(makeFailureValue());
|
|
}
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_NTH_ARGUMENT_IS_NOT_A_STRING_ERROR, "strcmp", 1);
|
|
return(makeFailureValue());
|
|
}
|
|
string1 = (stringType *)stringValue->value;
|
|
parameterList = parameterList->nextOperand;
|
|
if (parameterList == NULL)
|
|
return(makeStringValue(string1));
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_NTH_ARGUMENT_IS_NOT_A_STRING_ERROR, "strcmp", 2);
|
|
return(makeFailureValue());
|
|
}
|
|
string2 = (stringType *)stringValue->value;
|
|
return(makeIntegerValue(strcmp(string1, string2)));
|
|
}
|
|
|
|
/* Compare two strings in a case-independent fashion */
|
|
valueType *
|
|
strcmplcBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *stringValue;
|
|
stringType *string1;
|
|
stringType *string2;
|
|
stringType *newString;
|
|
|
|
if (parameterList == NULL) {
|
|
error(NO_ARGUMENTS_TO_BIF_ERROR, "strcmplc");
|
|
return(makeFailureValue());
|
|
}
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_NTH_ARGUMENT_IS_NOT_A_STRING_ERROR, "strcmplc", 1);
|
|
return(makeFailureValue());
|
|
}
|
|
string1 = (stringType *)stringValue->value;
|
|
parameterList = parameterList->nextOperand;
|
|
if (parameterList == NULL)
|
|
return(makeStringValue(string1));
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_NTH_ARGUMENT_IS_NOT_A_STRING_ERROR, "strcmplc", 2);
|
|
return(makeFailureValue());
|
|
}
|
|
string2 = (stringType *)stringValue->value;
|
|
return(makeIntegerValue(strcmplc(string1, string2)));
|
|
}
|
|
|
|
/* Return the length of a string */
|
|
valueType *
|
|
strlenBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *stringValue;
|
|
|
|
if (parameterList == NULL)
|
|
return(makeIntegerValue(-1));
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_ARGUMENT_IS_NOT_A_STRING_ERROR, "strlen");
|
|
return(makeFailureValue());
|
|
} else
|
|
return(makeIntegerValue(strlen(stringValue->value)));
|
|
}
|
|
|
|
/* Return a substring of a string */
|
|
valueType *
|
|
substrBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *stringValue;
|
|
stringType *string;
|
|
valueType *startValue;
|
|
int start;
|
|
valueType *lengthValue;
|
|
int length;
|
|
stringType *newString;
|
|
int originalLength;
|
|
bool backwards;
|
|
|
|
if (parameterList == NULL) {
|
|
error(NO_ARGUMENTS_TO_BIF_ERROR, "substr");
|
|
return(makeFailureValue());
|
|
}
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_ARGUMENT_IS_NOT_A_STRING_ERROR, "substr");
|
|
return(makeFailureValue());
|
|
}
|
|
string = (stringType *)stringValue->value;
|
|
originalLength = strlen(string);
|
|
|
|
parameterList = parameterList->nextOperand;
|
|
if (parameterList == NULL) {
|
|
error(TOO_FEW_ARGUMENTS_TO_BIF_ERROR, "substr");
|
|
return(makeFailureValue());
|
|
}
|
|
startValue = evaluateOperand(parameterList);
|
|
if (startValue->kindOfValue != ABSOLUTE_VALUE) {
|
|
error(BIF_NTH_ARGUMENT_IS_NOT_ABSOLUTE_VALUE_ERROR, "substr",
|
|
2);
|
|
return(makeFailureValue());
|
|
}
|
|
start = startValue->value;
|
|
if (start < 0) {
|
|
start = -start - 1;
|
|
backwards = TRUE;
|
|
} else
|
|
backwards = FALSE;
|
|
|
|
parameterList = parameterList->nextOperand;
|
|
if (parameterList == NULL) {
|
|
length = originalLength - start;
|
|
if (backwards)
|
|
length = -length;
|
|
} else {
|
|
lengthValue = evaluateOperand(parameterList);
|
|
if (lengthValue->kindOfValue != ABSOLUTE_VALUE) {
|
|
error(BIF_NTH_ARGUMENT_IS_NOT_ABSOLUTE_VALUE_ERROR,
|
|
"substr", 3);
|
|
return(makeFailureValue());
|
|
}
|
|
length = lengthValue->value;
|
|
}
|
|
if (length < 0) {
|
|
length = -length;
|
|
if (backwards)
|
|
start = start + length - 1;
|
|
else
|
|
start = start - length + 1;
|
|
}
|
|
if (backwards)
|
|
start = originalLength - start - 1;
|
|
if (originalLength <= start || originalLength < length + start ||
|
|
start < 0 ){
|
|
error(BAD_SUBSTRING_INDICES_ERROR);
|
|
return(makeFailureValue());
|
|
}
|
|
newString = (stringType *)malloc(length+1);
|
|
strncpy(newString, string+start, length);
|
|
newString[length] = '\0';
|
|
return(makeStringValue(newString));
|
|
}
|
|
|
|
/* Turn a string into a symbol */
|
|
valueType *
|
|
symbolLookupBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *stringValue;
|
|
stringType *identifierToLookup;
|
|
|
|
expressionTermType *buildExpressionTerm(expressionTermKindType kindOfExpressionTerm, anyOldThing *arg1, anyOldThing *arg2, anyOldThing *arg3);
|
|
operandType *buildOperand(operandKindType kindOfOperand, anyOldThing *arg);
|
|
valueType *evaluateIdentifier(symbolTableEntryType *identifier, bool isTopLevel, fixupKindType kindOfFixup);
|
|
|
|
if (parameterList == NULL) {
|
|
error(NO_ARGUMENTS_TO_BIF_ERROR, "symbolLookup");
|
|
return(makeFailureValue());
|
|
}
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_ARGUMENT_IS_NOT_A_STRING_ERROR, "symbolLookup");
|
|
return(makeFailureValue());
|
|
}
|
|
identifierToLookup = (stringType *)stringValue->value;
|
|
return(evaluateIdentifier(lookupOrEnterSymbol(identifierToLookup,
|
|
UNKNOWN_SYMBOL), FALSE, kindOfFixup));
|
|
}
|
|
|
|
/* Define a string as a symbol */
|
|
valueType *
|
|
symbolDefineBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *stringValue;
|
|
statementType *syntheticDefineStatement;
|
|
statementType *buildDefineStatement(stringType *name, expressionType *value);
|
|
|
|
if (parameterList == NULL) {
|
|
error(NO_ARGUMENTS_TO_BIF_ERROR, "symbolDefine");
|
|
return(makeFailureValue());
|
|
}
|
|
stringValue = evaluateOperand(parameterList);
|
|
if (stringValue->kindOfValue != STRING_VALUE) {
|
|
error(BIF_ARGUMENT_IS_NOT_A_STRING_ERROR, "symbolDefine");
|
|
return(makeFailureValue());
|
|
}
|
|
parameterList = parameterList->nextOperand;
|
|
if (parameterList == NULL) {
|
|
syntheticDefineStatement = buildDefineStatement(stringValue->
|
|
value, NULL);
|
|
} else if (parameterList->kindOfOperand != EXPRESSION_OPND) {
|
|
error(SYMBOL_DEFINE_VALUE_NOT_EXPRESSION_OPND_ERROR);
|
|
return(makeFailureValue());
|
|
} else {
|
|
syntheticDefineStatement = buildDefineStatement(stringValue->
|
|
value, parameterList->theOperand.expressionUnion);
|
|
}
|
|
assembleDefineStatement(syntheticDefineStatement->statementBody.defineUnion);
|
|
freeStatement(syntheticDefineStatement);
|
|
return(makeBooleanValue(TRUE));
|
|
}
|
|
|
|
/* Turn a symbol into a string */
|
|
valueType *
|
|
symbolNameBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
expressionType *expression;
|
|
symbolInContextType *context;
|
|
environmentType *saveEnvironment;
|
|
|
|
symbolInContextType *getWorkingContext(symbolTableEntryType *identifier);
|
|
|
|
saveEnvironment = currentEnvironment;
|
|
while (parameterList != NULL && parameterList->kindOfOperand ==
|
|
EXPRESSION_OPND) {
|
|
expression = parameterList->theOperand.expressionUnion;
|
|
if (expression->kindOfTerm == IDENTIFIER_EXPR && (context =
|
|
getWorkingContext(expression->expressionTerm.
|
|
identifierUnion)) != NULL) {
|
|
if (context->value->kindOfValue != OPERAND_VALUE ||
|
|
context->usage != ARGUMENT_SYMBOL) {
|
|
currentEnvironment = saveEnvironment;
|
|
return(makeStringValue(symbName(expression->
|
|
expressionTerm.identifierUnion)));
|
|
} else {
|
|
currentEnvironment = currentEnvironment->
|
|
previousEnvironment;
|
|
parameterList = (operandListType *)context->
|
|
value->value;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
currentEnvironment = saveEnvironment;
|
|
error(CANT_FIND_SYMBOL_ERROR);
|
|
return(makeStringValue(""));
|
|
}
|
|
|
|
/* Return internal form of what sort of symbol a symbol is */
|
|
valueType *
|
|
symbolUsageBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
expressionType *expression;
|
|
symbolInContextType *context;
|
|
|
|
symbolInContextType *getWorkingContext(symbolTableEntryType *identifier);
|
|
|
|
if (parameterList != NULL && parameterList->kindOfOperand ==
|
|
EXPRESSION_OPND) {
|
|
expression = parameterList->theOperand.expressionUnion;
|
|
if (expression->kindOfTerm == IDENTIFIER_EXPR && (context =
|
|
getWorkingContext(expression->expressionTerm.
|
|
identifierUnion))!=NULL)
|
|
return(makeIntegerValue(context->usage));
|
|
}
|
|
return(makeIntegerValue(-1));
|
|
}
|
|
|
|
/* Return internal form of what sort of value a value is */
|
|
valueType *
|
|
valueTypeBIF(operandListType *parameterList, fixupKindType kindOfFixup)
|
|
{
|
|
valueType *evaluatedParameter;
|
|
|
|
|
|
if (parameterList != NULL) {
|
|
evaluatedParameter = evaluateOperand(parameterList);
|
|
return(makeIntegerValue(evaluatedParameter->kindOfValue));
|
|
} else {
|
|
return(makeIntegerValue(-1));
|
|
}
|
|
}
|
|
|