Brad Arant
97142ce9b4
Found while writing a new Expressions Reference chapter for the manual,
where every function got run for real before being documented rather
than trusted from reading the source alone - substring('helloworld', 7)
threw "operand is not valid." immediately after producing the correct
answer, confirmed via debug tracing showing an extra Operand constructed
on empty input right after the 2-arg case finished.
Root cause: a missing pair of braces around the 3-argument-only branch
meant Operand parm3(in, tag) and its own closing-paren check ran
unconditionally, even after the 2-arg form's own "if(in.ifNext(')'))"
check had already matched and produced string = parm1.string.substring(
parm2.string.asInteger()) - so it immediately tried to parse a third
argument from whatever was left (nothing, since the real closing paren
was already consumed), and construction on empty input always throws.
The 3-argument form (substring(str, start, length)) was unaffected,
since its own path never hit the first if-branch's early exit.
Fixed by properly scoping the 3-arg branch inside an else, so it only
runs when the 2-arg form's own closing paren wasn't found. Verified both
forms with real jet-2.0 runs: substring('helloworld', 7) -> "rld",
substring('helloworld', 0, 5) -> "hello".
619 lines
20 KiB
C++
619 lines
20 KiB
C++
#include "Operand.h"
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#include "Exception.h"
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#include <format>
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#include <iostream>
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#include <algorithm>
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#include <time.h>
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#include <chrono>
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#include <cmath>
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namespace jet {
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Operand::Operand(coreutils::ZString &in, Tag &tag, bool stop) : in(in), tag(tag) {
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doubleValue = 0;
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in.skipWhitespace();
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if(in.startsWith("$[") || in.startsWith("#[")) {
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string = tag.getVariable(in);
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doubleValue = string.asDouble();
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isNumber = string.eod();
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string.reset();
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if((string == "false") || (string == "true"))
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boolean = (string == "true");
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} else if(in.ifNext("(")) {
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Operand op(in, tag);
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string = op.string;
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doubleValue = op.doubleValue;
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isNumber = op.isNumber;
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if(!in.ifNext(")"))
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throw coreutils::Exception("expected ) in expression.");
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} else if(in.ifNextIgnoreCase("SUBSTRING")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for SUBSTRING parameters.");
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Operand parm1(in, tag);
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if(!in.ifNext(","))
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throw coreutils::Exception("Expecting , in SUBSTRING expression.");
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Operand parm2(in, tag);
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if(in.ifNext(")")) {
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string = parm1.string.substring(parm2.string.asInteger());
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} else {
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// Real, pre-existing bug fixed here: the 3-arg-only branch below
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// used to run unconditionally (missing braces around this
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// else-if), so even after the 2-arg form above already
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// succeeded, it fell through into trying to parse a third
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// argument from whatever was left (nothing, since the closing
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// ")" was already consumed) - always throwing "operand is not
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// valid." right after computing the correct 2-arg result.
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// Confirmed via real debug tracing showing an extra Operand
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// constructed on empty input immediately after a successful
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// 2-arg substring(str, start) call - the 2-arg form was
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// completely unusable before this fix.
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if(!in.ifNext(","))
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throw coreutils::Exception("Expecting , in SUBSTRING expression.");
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Operand parm3(in, tag);
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if(in.ifNext(")")) {
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string = parm1.string.substring(parm2.string.asInteger(), parm3.string.asInteger());
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} else
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throw coreutils::Exception("Expecting ) at end of substring expression.");
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}
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} else if(in.ifNextIgnoreCase("LEFT")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for LEFT parameters.");
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Operand parm1(in, tag);
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if(!in.ifNext(","))
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throw coreutils::Exception("Expecting , in LEFT expression.");
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Operand parm2(in, tag);
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if(in.ifNext(")")) {
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string = parm1.string.substring(0, parm2.string.asInteger());
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} else
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throw coreutils::Exception("Expecting ) at end of LEFT expression.");
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} else if(in.ifNextIgnoreCase("EXPR")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for EXPR parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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Operand op(parm1.string, tag);
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string = op.string;
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isNumber = op.isNumber;
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if(isNumber) {
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doubleValue = op.doubleValue;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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}
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boolean = op.boolean;
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} else
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throw coreutils::Exception("Expecting ) at end of EXPR expression.");
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} else if(in.ifNextIgnoreCase("RIGHT")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for RIGHT parameters.");
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Operand parm1(in, tag);
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if(!in.ifNext(","))
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throw coreutils::Exception("Expecting , in RIGHT expression.");
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Operand parm2(in, tag);
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if(in.ifNext(")")) {
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int len = parm1.string.getLength();
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int size = parm2.string.asInteger();
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int start = len - size;
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string = parm1.string.substring(start, size);
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} else
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throw coreutils::Exception("Expecting ) at end of RIGHT expression.");
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} else if(in.ifNextIgnoreCase("TRIM")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for TRIM parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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string = parm1.string.trim();
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} else
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throw coreutils::Exception("Expecting ) at end of TRIM expression.");
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} else if(in.ifNextIgnoreCase("TOUPPER")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for TOUPPER parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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string = parm1.string.toUpper();
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} else
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throw coreutils::Exception("Expecting ) at end of TOUPPER expression.");
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} else if(in.ifNextIgnoreCase("TOLOWER")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for TOLOWER parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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string = parm1.string.toLower();
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} else
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throw coreutils::Exception("Expecting ) at end of TOLOWER expression.");
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} else if(in.ifNextIgnoreCase("REVERSE")) {
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} else if(in.ifNextIgnoreCase("CONCAT")) {
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} else if(in.ifNextIgnoreCase("INTEGER")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for INTEGER parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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string = parm1.string.asInteger();
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} else
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throw coreutils::Exception("Expecting ) at end of INTEGER expression.");
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} else if(in.ifNextIgnoreCase("ROUND")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for ROUND parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = round(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of ROUND expression.");
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} else if(in.ifNextIgnoreCase("RANDOM")) {
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unsigned int seed = (unsigned int)clock();
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doubleValue = (double) rand_r(&seed) / (RAND_MAX + 1.0);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else if(in.ifNextIgnoreCase("ABS")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for ABS parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = abs(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of ABS expression.");
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} else if(in.ifNextIgnoreCase("MAX")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for MAX parameters.");
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Operand *parm = new Operand(in, tag);
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string = parm->string;
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doubleValue = parm->doubleValue;
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isNumber = parm->isNumber;
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delete parm;
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while(in.ifNext(",")) {
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parm = new Operand(in, tag);
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if(isNumber != parm->isNumber)
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throw coreutils::Exception("All parameters in MAX expression must be same type.");
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if(isNumber) {
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if(parm->doubleValue > doubleValue) {
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doubleValue = parm->doubleValue;
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string = parm->string;
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}
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} else {
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if(parm->string > string) {
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doubleValue = parm->doubleValue;
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string = parm->string;
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}
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}
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delete parm;
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}
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if(!in.ifNext(")")) {
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throw coreutils::Exception("Expecting ) at end of MAX expression.");
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}
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string.removeTrailingZeros();
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} else if(in.ifNextIgnoreCase("MIN")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for MIN parameters.");
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Operand *parm = new Operand(in, tag);
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string = parm->string;
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doubleValue = parm->doubleValue;
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isNumber = parm->isNumber;
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delete parm;
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while(in.ifNext(",")) {
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parm = new Operand(in, tag);
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if(isNumber != parm->isNumber)
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throw coreutils::Exception("All parameters in MIN expression must be same type.");
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if(isNumber) {
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if(parm->doubleValue < doubleValue) {
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doubleValue = parm->doubleValue;
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string = parm->string;
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}
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} else {
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if(parm->string < string) {
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doubleValue = parm->doubleValue;
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string = parm->string;
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}
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}
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delete parm;
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}
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if(!in.ifNext(")")) {
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throw coreutils::Exception("Expecting ) at end of MIN expression.");
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}
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string.removeTrailingZeros();
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} else if(in.ifNextIgnoreCase("POW")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for POW parameters.");
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Operand parm1(in, tag);
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if(!in.ifNext(","))
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throw coreutils::Exception("Expecting , in POW expression.");
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Operand parm2(in, tag);
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if(in.ifNext(")")) {
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doubleValue = pow(parm1.doubleValue, parm2.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of substring expression.");
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} else if(in.ifNextIgnoreCase("SIN")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for SIN parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = sin(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of SIN expression.");
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} else if(in.ifNextIgnoreCase("ASIN")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for ASIN parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = asin(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of ASIN expression.");
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} else if(in.ifNextIgnoreCase("COS")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for COS parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = cos(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of COS expression.");
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} else if(in.ifNextIgnoreCase("ACOS")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for ACOS parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = acos(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of ACOS expression.");
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} else if(in.ifNextIgnoreCase("ATAN")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for ATAN parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = atan(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of ATAN expression.");
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} else if(in.ifNextIgnoreCase("SQRT")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for SQRT parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = sqrt(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of SQRT expression.");
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} else if(in.ifNextIgnoreCase("DEG")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for DEG parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = parm1.doubleValue * 180 / 3.14159;
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of DEG expression.");
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} else if(in.ifNextIgnoreCase("RAD")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for RAD parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = parm1.doubleValue * 3.14159 / 180;
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of RAD expression.");
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} else if(in.ifNextIgnoreCase("TAN")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for TAN parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = tan(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of TAN expression.");
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} else if(in.ifNextIgnoreCase("TRUNC")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for TRUNC parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = trunc(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of TRUNC expression.");
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} else if(in.ifNextIgnoreCase("CEIL")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for CEIL parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = ceil(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of CEIL expression.");
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} else if(in.ifNextIgnoreCase("FLOOR")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for FLOOR parameters.");
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Operand parm1(in, tag);
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if(in.ifNext(")")) {
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doubleValue = floor(parm1.doubleValue);
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isNumber = true;
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string = std::format("{:.12f}", doubleValue);
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string.removeTrailingZeros();
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} else
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throw coreutils::Exception("Expecting ) at end of FLOOR expression.");
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} else if(in.ifNextIgnoreCase("UNIXTIME")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for UNIXTIME.");
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if(in.ifNext(")")) {
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auto now = std::chrono::system_clock::now();
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auto duration_since_epoch = now.time_since_epoch();
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auto seconds_since_epoch = std::chrono::duration_cast<std::chrono::seconds>(duration_since_epoch);
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int unixtime = seconds_since_epoch.count();
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string << unixtime;
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} else
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throw coreutils::Exception("Expecting ) at end of UNIXTIME.");
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}
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else if(in.ifNextIgnoreCase("DATEDIFF")) {
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if(!in.ifNext("("))
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throw coreutils::Exception("Expecting ( for DATEDIFF.");
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Operand parm1(in, tag);
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if(!in.ifNext(","))
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throw coreutils::Exception("Expecting , in DATEDIFF expression.");
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Operand parm2(in, tag);
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if(in.ifNext(")")) {
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// TODO: Implement DATEDIFF.
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} else
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throw coreutils::Exception("Expecting ) at end of DATEDIFF expression.");
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} else if(in.ifNextIgnoreCase("true")) {
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boolean = true;
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string = "true";
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} else if(in.ifNextIgnoreCase("false")) {
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boolean = false;
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string = "false";
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} else if(in.startsWithNumber()) {
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doubleValue = in.asDouble();
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string = std::format("{:.12f}", doubleValue);
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isNumber = true;
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} else if(in.ifNext("'")) {
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string = in.getTokenExclude("'");
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in.ifNext("'");
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isNumber = false;
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} else
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throw coreutils::Exception("operand is not valid.");
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in.skipWhitespace();
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if(!stop)
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parseOperator();
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return;
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}
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int Operand::parseOperator() {
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if(in.ifNext("!=") || in.ifNext("<>")) {
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Operand op(in, tag);
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if(isNumber && op.isNumber) {
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if(doubleValue != op.doubleValue) {
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boolean = true;
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isNumber = false;
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string = "true";
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} else {
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boolean = false;
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isNumber = false;
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string = "false";
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}
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} else if(!isNumber && !op.isNumber) {
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if(string != op.string) {
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boolean = true;
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isNumber = false;
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string = "true";
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} else {
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boolean = false;
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isNumber = false;
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string = "false";
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}
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}
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}
|
|
if(in.ifNext("<=")) {
|
|
Operand op(in, tag);
|
|
if(isNumber && op.isNumber) {
|
|
if(doubleValue <= op.doubleValue) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
} else if(!isNumber && !op.isNumber) {
|
|
if(string <= op.string) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
}
|
|
}
|
|
if(in.ifNext(">=")) {
|
|
Operand op(in, tag);
|
|
if(isNumber && op.isNumber) {
|
|
if(doubleValue >= op.doubleValue) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
} else if(!isNumber && !op.isNumber) {
|
|
if(string >= op.string) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
}
|
|
}
|
|
if(in.ifNext("=")) {
|
|
Operand op(in, tag);
|
|
if(isNumber && op.isNumber) {
|
|
if(doubleValue == op.doubleValue) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
} else if(!isNumber && !op.isNumber) {
|
|
if(string == op.string) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
}
|
|
}
|
|
if(in.ifNext("<")) {
|
|
Operand op(in, tag);
|
|
if(isNumber && op.isNumber) {
|
|
if(doubleValue < op.doubleValue) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
} else if(!isNumber && !op.isNumber) {
|
|
if(string < op.string) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
}
|
|
}
|
|
if(in.ifNext(">")) {
|
|
Operand op(in, tag);
|
|
if(isNumber && op.isNumber) {
|
|
if(doubleValue > op.doubleValue) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
} else if(!isNumber && !op.isNumber) {
|
|
if(string > op.string) {
|
|
boolean = true;
|
|
isNumber = false;
|
|
string = "true";
|
|
} else {
|
|
boolean = false;
|
|
isNumber = false;
|
|
string = "false";
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if(in.ifNext("+")) {
|
|
if(isNumber) {
|
|
Operand op(in, tag);
|
|
if(op.isNumber) {
|
|
doubleValue += op.doubleValue;
|
|
string = std::format("{:.12f}", doubleValue);
|
|
string.removeTrailingZeros();
|
|
} else
|
|
throw coreutils::Exception("operand is not a number.");
|
|
} else
|
|
throw coreutils::Exception("operand is not a number.");
|
|
} else if(in.ifNext("-")) {
|
|
if(isNumber) {
|
|
Operand op(in, tag);
|
|
if(op.isNumber) {
|
|
doubleValue -= op.doubleValue;
|
|
string = std::format("{:.12f}", doubleValue);
|
|
string.removeTrailingZeros();
|
|
} else
|
|
throw coreutils::Exception("operand is not a number.");
|
|
} else
|
|
throw coreutils::Exception("operand is not a number.");
|
|
} else if(in.ifNext("*")) {
|
|
if(isNumber) {
|
|
Operand op(in, tag, true);
|
|
if(op.isNumber) {
|
|
doubleValue *= op.doubleValue;
|
|
string = std::format("{:.12f}", doubleValue);
|
|
string.removeTrailingZeros();
|
|
parseOperator();
|
|
} else
|
|
throw coreutils::Exception("operand is not a number.");
|
|
} else
|
|
throw coreutils::Exception("operand is not a number.");
|
|
} else if(in.ifNext("/")) {
|
|
if(isNumber) {
|
|
Operand op(in, tag, true);
|
|
if(op.isNumber) {
|
|
doubleValue /= op.doubleValue;
|
|
string = std::format("{:.12f}", doubleValue);
|
|
string.removeTrailingZeros();
|
|
parseOperator();
|
|
} else
|
|
throw coreutils::Exception("operand is not a number.");
|
|
} else
|
|
throw coreutils::Exception("operand is not a number.");
|
|
}
|
|
return true;
|
|
}
|
|
|
|
}
|