62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
/*
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abCExpr.c
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By: Jeremy Rand
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*/
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#include <stdlib.h>
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#include "expr/abCExpr.h"
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static abCalcExprCallbacks *gCallbacks[abCalcExprTypeMax];
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#define AB_CALC_EXPR_TYPE_INVALID(type) (((type) < abCalcExprTypeMin) || ((type) >= abCalcExprTypeMax))
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void abCalcExprInit(void)
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{
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abCalcExprType type;
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for (type = abCalcExprTypeMin; type < abCalcExprTypeMax; type++) {
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gCallbacks[type] = NULL;
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}
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}
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void abCalcRegisterExprType(abCalcExprType type, abCalcExprCallbacks *callbacks)
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{
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if (AB_CALC_EXPR_TYPE_INVALID(type))
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return;
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gCallbacks[type] = callbacks;
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}
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abCalcExpr *abCalcParseExpr(abCalcExpr *expr, char *buffer)
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{
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abCalcExpr *result = NULL;
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abCalcExprType type;
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for (type = abCalcExprTypeMin; type < abCalcExprTypeMax; type++) {
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if (gCallbacks[type] != NULL) {
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result = (gCallbacks[type]->parseExpr)(expr, buffer);
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if (result != NULL)
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return result;
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}
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}
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return result;
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}
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char *abCalcFormatExpr(abCalcExpr *expr, char *buffer)
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{
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if (AB_CALC_EXPR_TYPE_INVALID(expr->type))
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return NULL;
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if (gCallbacks[expr->type] == NULL)
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return NULL;
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return (gCallbacks[expr->type]->formatExpr(expr, buffer));
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}
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