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Fixed bug in script parser/compiler: "x[if a then b else c]" was incorrectly optimized;

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Sciript parse errors in include files now get reported for the right file and line number.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@458 0fc631ac-6414-0410-93d0-97cfa31319b6
This commit is contained in:
twanvl
2007-07-01 18:11:48 +00:00
parent 68e48e8b81
commit 86393f33dc
6 changed files with 118 additions and 73 deletions
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src/script/context.cpp
+22 -6
View File
@@ -130,9 +130,20 @@ ScriptValueP Context::eval(const Script& script, bool useScope) {
// skip the stack effect of the arguments themselfs
const Instruction* instr_bt = script.backtraceSkip(instr - i.data - 2, i.data);
// have we have reached the name
if (instr_bt && instr_bt->instr == I_GET_VAR) {
// this is a valid instruction, it is I_GET_VAR
throw ScriptError(e.what() + _("\n in function: ") + variable_to_string(instr_bt->data));
if (instr_bt) {
if (instr_bt->instr == I_GET_VAR) {
throw ScriptError(e.what() + _("\n in function: ") + variable_to_string(instr_bt->data));
} else if (instr_bt->instr == I_MEMBER_C) {
throw ScriptError(e.what() + _("\n in function: ???.") + *script.constants[instr_bt->data]);
} else if (instr_bt->instr == I_BINARY && instr_bt->instr2 == I_MEMBER) {
throw ScriptError(e.what() + _("\n in function: ???[???]"));
} else if (instr_bt->instr == I_BINARY && instr_bt->instr2 == I_ADD) {
throw ScriptError(e.what() + _("\n in function: ??? + ???"));
} else if (instr_bt->instr == I_NOP || instr_bt->instr == I_CALL) {
throw ScriptError(e.what() + _("\n in function: ???(???)"));
} else {
throw ScriptError(e.what() + _("\n in function: ???"));
}
} else {
throw e; // rethrow
}
@@ -234,10 +245,15 @@ void instrUnary (UnaryInstructionType i, ScriptValueP& a) {
case I_ITERATOR_C:
a = a->makeIterator(a);
break;
case I_NEGATE:
a = to_script(-(int)*a);
case I_NEGATE: {
ScriptType at = a->type();
if (at == SCRIPT_DOUBLE) {
a = to_script(-(double)*a);
} else {
a = to_script(-(int)*a);
}
break;
case I_NOT:
} case I_NOT:
a = to_script(!(bool)*a);
break;
}
src/script/parser.cpp
+24 -11
View File
@@ -19,6 +19,8 @@ DECLARE_TYPEOF_COLLECTION(Variable);
#define TokenType TokenType_ // some stupid windows header uses our name
#endif
String read_utf8_line(wxInputStream& input, bool eat_bom = true, bool until_eof = false);
// ----------------------------------------------------------------------------- : Tokenizing : class
enum TokenType
@@ -72,6 +74,7 @@ class TokenIterator {
private:
String input;
size_t pos;
String filename; ///< Filename of include files, "" for the main input
vector<Token> buffer; ///< buffer of unread tokens, front() = current
stack<OpenBrace> open_braces; ///< braces/quotes we entered from script mode
bool newline; ///< Did we just pass a newline?
@@ -79,6 +82,7 @@ class TokenIterator {
struct MoreInput {
String input;
size_t pos;
String filename;
};
stack<MoreInput> more; ///< Read tokens from here when we are done with the current input
@@ -154,8 +158,9 @@ void TokenIterator::readToken() {
if (pos >= input.size()) {
// done with input, is there more?
if (!more.empty()) {
input = more.top().input;
pos = more.top().pos;
input = more.top().input;
pos = more.top().pos;
filename = more.top().filename;
more.pop();
} else {
// EOF
@@ -176,17 +181,15 @@ void TokenIterator::readToken() {
pos += 12; // "nclude file:"
size_t eol = input.find_first_of(_("\r\n"), pos);
if (eol == String::npos) eol = input.size();
String filename = trim(input.substr(pos, eol - pos));
String include_file = trim(input.substr(pos, eol - pos));
// store the current input for later retrieval
MoreInput m = {input, eol};
MoreInput m = {input, eol, filename};
more.push(m);
// open file
InputStreamP is = packages.openFileFromPackage(filename);
wxTextInputStream tis(*is);
// read the entire file, and start at the beginning of it
pos = 0;
input.clear();
while (!is->Eof()) input += tis.ReadLine() + _('\n');
filename = include_file;
InputStreamP is = packages.openFileFromPackage(include_file);
input = read_utf8_line(*is, true, true);
} else if (isAlpha(c)) {
// name
size_t start = pos - 1;
@@ -285,12 +288,22 @@ void TokenIterator::readStringToken() {
void TokenIterator::add_error(const String& message) {
if (!errors.empty() && errors.back().start == pos) return; // already an error here
errors.push_back(ScriptParseError(pos, message));
// find line number
int line = 1;
for (size_t i = 0 ; i < input.size() && i < pos ; ++i) {
if (input.GetChar(i) == _('\n')) line++;
}
errors.push_back(ScriptParseError(pos, line, filename, message));
}
void TokenIterator::expected(const String& expected) {
size_t error_pos = pos - peek(0).value.size();
if (!errors.empty() && errors.back().start == pos) return; // already an error here
errors.push_back(ScriptParseError(error_pos, expected, peek(0).value));
// find line number
int line = 1;
for (size_t i = 0 ; i < input.size() && i < error_pos ; ++i) {
if (input.GetChar(i) == _('\n')) line++;
}
errors.push_back(ScriptParseError(error_pos, line, filename, expected, peek(0).value));
}
src/script/script.cpp
+49 -44
View File
@@ -65,11 +65,14 @@ void Script::addInstruction(InstructionType t) {
instructions.push_back(i);
}
void Script::addInstruction(InstructionType t, unsigned int d) {
if (t == I_BINARY && d == I_MEMBER && !instructions.empty() && instructions.back().instr == I_PUSH_CONST) {
// Don't optimize ...I_PUSH_CONST x; I_MEMBER... to I_MEMBER_C
// because the code could be something[if a then "x" else "y"]
// the last instruction before I_MEMBER is I_PUSH_CONST "y", but this is only one branch of the if
/*if (t == I_BINARY && d == I_MEMBER && !instructions.empty() && instructions.back().instr == I_PUSH_CONST) {
// optimize: push x ; member --> member_c x
instructions.back().instr = I_MEMBER_C;
return;
}
}*/
Instruction i = {t, {d}};
instructions.push_back(i);
}
@@ -97,76 +100,78 @@ unsigned int Script::getLabel() const {
DECLARE_TYPEOF_COLLECTION(Instruction);
#if 0 // debugging
#ifdef _DEBUG // debugging
String Script::dumpScript() const {
String ret;
int pos = 0;
FOR_EACH_CONST(i, instructions) {
ret += dumpInstr(pos++, i) + "\n";
wxLogDebug(dumpInstr(pos, i));
ret += dumpInstr(pos++, i) + _("\n");
}
return ret;
}
String Script::dumpInstr(unsigned int pos, Instruction i) const {
String ret = lexical_cast<String>(pos) + ":\t";
String ret = String::Format(_("%d:\t"),pos);
// instruction
switch (i.instr) {
case I_NOP: ret += "nop"; break;
case I_PUSH_CONST: ret += "push"; break;
case I_POP: ret += "pop"; break;
case I_JUMP: ret += "jump"; break;
case I_JUMP_IF_NOT: ret += "jnz"; break;
case I_GET_VAR: ret += "get"; break;
case I_SET_VAR: ret += "set"; break;
case I_MEMBER_C: ret += "member_c"; break;
case I_LOOP: ret += "loop"; break;
case I_CALL: ret += "call"; break;
case I_RET: ret += "ret"; break;
case I_UNARY: ret += "unary\t";
case I_NOP: ret += _("nop"); break;
case I_PUSH_CONST: ret += _("push"); break;
case I_POP: ret += _("pop"); break;
case I_JUMP: ret += _("jump"); break;
case I_JUMP_IF_NOT: ret += _("jnz"); break;
case I_GET_VAR: ret += _("get"); break;
case I_SET_VAR: ret += _("set"); break;
case I_MEMBER_C: ret += _("member_c"); break;
case I_LOOP: ret += _("loop"); break;
case I_MAKE_OBJECT: ret += _("make object");break;
case I_CALL: ret += _("call"); break;
case I_RET: ret += _("ret"); break;
case I_UNARY: ret += _("unary\t");
switch (i.instr1) {
case I_ITERATOR_C: ret += "iterator_c";break;
case I_NEGATE: ret += "negate"; break;
case I_NOT: ret += "not"; break;
case I_ITERATOR_C: ret += _("iterator_c"); break;
case I_NEGATE: ret += _("negate"); break;
case I_NOT: ret += _("not"); break;
}
break;
case I_BINARY: ret += "binary\t";
case I_BINARY: ret += _("binary\t");
switch (i.instr2) {
case I_ITERATOR_R: ret += "iterator_r";break;
case I_MEMBER: ret += "member"; break;
case I_ADD: ret += "+"; break;
case I_SUB: ret += "-"; break;
case I_MUL: ret += "*"; break;
case I_DIV: ret += "/"; break;
case I_MOD: ret += "*"; break;
case I_AND: ret += "and"; break;
case I_OR: ret += "or"; break;
case I_EQ: ret += "=="; break;
case I_NEQ: ret += "!="; break;
case I_LT: ret += "<"; break;
case I_GT: ret += ">"; break;
case I_LE: ret += "<="; break;
case I_GE: ret += ">="; break;
case I_ITERATOR_R: ret += _("iterator_r"); break;
case I_MEMBER: ret += _("member"); break;
case I_ADD: ret += _("+"); break;
case I_SUB: ret += _("-"); break;
case I_MUL: ret += _("*"); break;
case I_DIV: ret += _("/"); break;
case I_MOD: ret += _("mod"); break;
case I_AND: ret += _("and"); break;
case I_OR: ret += _("or"); break;
case I_EQ: ret += _("=="); break;
case I_NEQ: ret += _("!="); break;
case I_LT: ret += _("<"); break;
case I_GT: ret += _(">"); break;
case I_LE: ret += _("<="); break;
case I_GE: ret += _(">="); break;
case I_OR_ELSE: ret += _("or else"); break;
}
break;
case I_TERNARY: ret += "ternary\t";
case I_TERNARY: ret += _("ternary\t");
switch (i.instr3) {
case I_RGB: ret += "rgb"; break;
case I_RGB: ret += _("rgb"); break;
}
break;
}
// arg
switch (i.instr) {
case I_PUSH_CONST: case I_MEMBER_C: // const
ret += "\t" + (String)*constants[i.data];
ret += "\t(" + constants[i.data]->typeName();
ret += ", #" + lexical_cast<String>(i.data) + ")";
ret += _("\t") + constants[i.data]->toString();
ret += _("\t(") + constants[i.data]->typeName() + _(")");
break;
case I_JUMP: case I_JUMP_IF_NOT: case I_LOOP: case I_CALL: // int
ret += "\t" + lexical_cast<String>(i.data);
ret += String::Format(_("\t%d"), i.data);
break;
case I_GET_VAR: case I_SET_VAR: case I_NOP: // variable
ret += "\t" + variable_to_string(i.data) + "\t$" + lexical_cast<String>(i.data);
ret += _("\t") + variable_to_string(i.data);
break;
}
return ret;
@@ -243,4 +248,4 @@ const Instruction* Script::backtraceSkip(const Instruction* instr, int to_skip)
}
}
return instr >= &instructions[0] ? instr : nullptr;
}
}
src/script/scriptable.cpp
+13 -6
View File
@@ -48,13 +48,20 @@ void OptionalScript::parse(Reader& reader, bool string_mode) {
vector<ScriptParseError> errors;
script = ::parse(unparsed, string_mode, errors);
// show parse errors as warnings
FOR_EACH(e, errors) {
// find line number
int line = 0;
for (size_t i = 0 ; i < unparsed.size() && i < e.start ; ++i) {
if (unparsed.GetChar(i) == _('\n')) line++;
String include_warnings;
for (size_t i = 0 ; i < errors.size() ; ++i) {
const ScriptParseError& e = errors[i];
if (!e.filename.empty()) {
// error in an include file
include_warnings += String::Format(_("\n On line %d:\t "), e.line) + e.ParseError::what();
if (i + 1 >= errors.size() || errors[i+1].filename != e.filename) {
reader.warning(_("In include file '") + e.filename + _("'") + include_warnings);
include_warnings.clear();
}
} else {
// use ParseError::what because we don't want e.start in the error message
reader.warning(e.ParseError::what(), e.line - 1);
}
reader.warning(e.ParseError::what(), line); // use ParseError::what because we don't want e.start in the error message
}
}