Strings, passing to native functions and converting from math types

Alan Kemp · 2005-01-06T07:25:39

Hi, I'm having some problems with strings. I'm using this code: void print_str(std::string msg) { // std::cout << msg << std::endl; printf("%s\n", msg.c_str()); } void print_int(int i) { // std::cout << i << std::endl; printf("%d\n", i); } const char * script = " " " void do_test() " " { " " int i = 42; " " print_int(i); " " " " string msg = \"Hello, World!\"; " " print_str(msg); " " } " " "; int main() { asIScriptEngine * engine = asCreateScriptEngine(ANGELSCRIPT_VERSION); RegisterStdString(engine); engine->RegisterGlobalFunction("void print_str(string msg)", asFUNCTION(print_str), asCALL_CDECL); engine->RegisterGlobalFunction("void print_int(int i)", asFUNCTION(print_int), asCALL_CDECL); OutStream out; engine->AddScriptSection(0, "name", script, (int)strlen(script), 0); engine->Build(0, &out); asIScriptContext *ctx; engine->CreateContext(&ctx); ctx->Prepare(engine->GetFunctionIDByDecl(0, "void do_test()")); int r = ctx->Execute(); if (r != 0) { if (r == asEXECUTION_EXCEPTION) { printf("Script exception\n"); printf("Func: %s\n", engine->GetFunctionName(ctx->GetExceptionFunction())); printf("Line: %d\n", ctx->GetExceptionLineNumber()); printf("Desc: %s\n", ctx->GetExceptionString()); } } return 0; } Which prints the int as expected, but doesn't print the string. I put a breakpoint in print_str and msg is empty. Any ideas? Secondly, I want to be able to convert between the math types and strings in script as if it were a typeless language. I think to do this I just need to register asBEHAVE_ASSIGNMENT functions for "string &f(int &in)" (and other types as needed), and then implement the conversion function as something like: string IntToString(int i) { stringstream stream; stream << i; string str; stream >> str; return str; } Am I on the right track? Have I missed some existing functionality that does this automatically or provides a simpler way? Alan

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Started by Alan Kemp January 01, 2005 04:16 PM

12 comments, last by WitchLord 19 years, 10 months ago

WitchLord

4,860

January 04, 2005 10:35 AM

Just wanted to let you know that I've found and fixed the bug.

I've completed WIP 2, which will contain the bug fix as well as support for object handles. I will hopefully be able to upload it to the site tonight.

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Alan Kemp

Author

772

January 04, 2005 11:56 PM

Quote:
If the bytecode was identical for both versions then something is terribly wrong. AngelScript has changed substantially in the way it handles objects (strings included) that it should definitely be different from 1.10.1c.

Of course this was just me being an idiot and comparing the same file to itself...

Quote:
Just wanted to let you know that I've found and fixed the bug.

I've completed WIP 2, which will contain the bug fix as well as support for object handles. I will hopefully be able to upload it to the site tonight.

Excellent. I'll update as soon as its posted. I'm still right at the begining of developing my app so I might as well keep up to the bleeding edge version.

Alan

"There will come a time when you believe everything is finished. That will be the beginning." -Louis L'Amour

WitchLord

4,860

January 05, 2005 07:02 AM

That's ok with me [smile]

I plan on making AS 2.0.0 a stable version once it is complete, because it is in my opinion much better than AS 1.10.1. I'll still keep 1.10.1 around though for those who are currently using that version.

AngelCode.com - game development and more - Reference DB - game developer references
AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

WitchLord

4,860

January 06, 2005 07:25 AM

WIP 2 is now available with the bug fix that should correct your initial problem.

AngelCode.com - game development and more - Reference DB - game developer references
AngelScript - free scripting library - BMFont - free bitmap font generator - Tower - free puzzle game

Strings, passing to native functions and converting from math types

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