root/utils/avmc/avmc.cpp

DEFINITIONS

1. main
2. fail
3. isNaN
4. obtainStorageForResult
5. readFileForEval
6. freeInput
7. doubleToString
8. stringToDouble
9. throwInternalError
10. throwSyntaxError

/* -*- tab-width: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
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 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is [Open Source Virtual Machine.].
 *
 * The Initial Developer of the Original Code is
 * Adobe System Incorporated.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Adobe AS3 Team
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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#include "avmplus.h"
#include "eval.h"

// avmc - ahead-of-time ActionScript compiler based on the eval code in Tamarin.
//
// usage: avmc <actionscript source file> ...

class AvmcHostContext : public avmplus::RTC::HostContext {
public:
        uint8_t* obtainStorageForResult(uint32_t nbytes);
        const wchar* readFileForEval(const wchar* basename, const wchar* filename, uint32_t* inputlen);
        void freeInput(const wchar* input);
        void doubleToString(double d, char* buf, size_t bufsiz);
        bool stringToDouble(const char* s, double* d);
        void throwInternalError(const char* msgz);
        void throwSyntaxError(const char* msgz);
        
        uint8_t* result;
        uint32_t result_size;
};

int fail(const char* fmt, ...);

int main (int argc, char** argv) 
{
        argc > 1 || fail("Usage: avmc <actionscript source file> ...");

        AvmcHostContext context;
        for ( int i=1 ; i < argc ; i++ )
        {
                char* filename = argv[i];
                FILE *fp = fopen(filename, "r");
                fp != NULL || fail("Could not open file for input: %s", filename);
                fseek(fp, 0, SEEK_END) == 0 || fail("Could not seek on input file: %s", filename);
                long int llen = ftell(fp);
                llen >= 0 || fail("Could not seek on input file: %s", filename);
                uint32_t len = (uint32_t)llen;
                fseek(fp, 0, SEEK_SET) == 0 || fail("Could not seek on input file: %s", filename);
                wchar *text = new wchar[len+1];
                text != NULL || fail("Out of memory");
                fread(text, 1, len, fp) == len || fail("Could not read from file: %s\n", filename);
                fclose(fp);
                wchar* wdest = text+len-1;
                char* csrc = (char*)text+len-1;
                while (wdest >= text)
                        *wdest-- = *csrc--;
                text[len] = 0;
                wchar* wfilename = new wchar[strlen(filename)+1];
                wfilename != NULL || fail("Out of memory");
                wdest = wfilename;
                csrc = filename;
                while (*wdest++ = *csrc++)
                        ;
                avmplus::RTC::Compiler compiler(&context, wfilename, text, len+1);
                compiler.compile();
                delete [] text;
                char *dotpos = strrchr(filename, '.');
                if (dotpos && strcmp(dotpos, ".as") == 0)
                        *dotpos = 0;
                char outfn[FILENAME_MAX];
                snprintf(outfn, sizeof(outfn), "%s.abc", filename);
                outfn[sizeof(outfn)-1] = 0;
                fp = fopen(outfn, "wb");
                fp != NULL || fail("Could not open file for output: %s\n", outfn);
                fwrite(context.result, 1, context.result_size, fp) == context.result_size || fail("Could not write to output: %s\n", outfn);
                fclose(fp);
                delete [] context.result;
                context.result = NULL;
        }
        return 0;
}

int fail(const char* fmt, ...)
{
    va_list args;
    fprintf(stderr, "Error: ");
    va_start(args, fmt);
    vfprintf(stderr, fmt, args);
    va_end(args);
    fprintf(stderr, "\n");
    exit(1);
        /*NOTREACHED*/
    return 0;
}

bool MathUtils::isNaN(double d)
{
        return d != d;
}

uint8_t* AvmcHostContext::obtainStorageForResult(uint32_t nbytes)
{
        result = new uint8_t[nbytes];
        result != NULL || fail("Out of memory");
        result_size = nbytes;
        return result;
}

const wchar* AvmcHostContext::readFileForEval(const wchar* basename, const wchar* filename, uint32_t* inputlen)
{
        throwInternalError("No support for 'include' yet");
        /*NOTREACHED*/
        return NULL;
}

void AvmcHostContext::freeInput(const wchar* input)
{
        throwInternalError("No support for 'include' yet");
}

void AvmcHostContext::doubleToString(double d, char* buf, size_t bufsiz)
{
        snprintf(buf, bufsiz, "%f", d);         // not sure about this
        buf[bufsiz-1] = 0;
}

bool AvmcHostContext::stringToDouble(const char* s, double* d)
{
        *d = strtod(s, NULL);
        return true;
}

void AvmcHostContext::throwInternalError(const char* msgz)
{
        fprintf(stderr, "%s", msgz);
        exit(1);
}

void AvmcHostContext::throwSyntaxError(const char* msgz)
{
        fprintf(stderr, "%s", msgz);
        exit(1);
}