#include "spec.h"
#include <stdio.h>

void printFileHeader(FILE *f)
{
    fprintf(f, "/*\n");
    fprintf(f, " * Copyright (C) 2010 The Android Open Source Project\n");
    fprintf(f, " *\n");
    fprintf(f, " * Licensed under the Apache License, Version 2.0 (the \"License\");\n");
    fprintf(f, " * you may not use this file except in compliance with the License.\n");
    fprintf(f, " * You may obtain a copy of the License at\n");
    fprintf(f, " *\n");
    fprintf(f, " *      http://www.apache.org/licenses/LICENSE-2.0\n");
    fprintf(f, " *\n");
    fprintf(f, " * Unless required by applicable law or agreed to in writing, software\n");
    fprintf(f, " * distributed under the License is distributed on an \"AS IS\" BASIS,\n");
    fprintf(f, " * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n");
    fprintf(f, " * See the License for the specific language governing permissions and\n");
    fprintf(f, " * limitations under the License.\n");
    fprintf(f, " */\n\n");
}

void printVarType(FILE *f, const VarType *vt)
{
    int ct;
    if (vt->isConst) {
        fprintf(f, "const ");
    }

    switch(vt->type) {
    case 0:
        fprintf(f, "void");
        break;
    case 1:
        fprintf(f, "int%i_t", vt->bits);
        break;
    case 2:
        fprintf(f, "uint%i_t", vt->bits);
        break;
    case 3:
        if (vt->bits == 32)
            fprintf(f, "float");
        else
            fprintf(f, "double");
        break;
    case 4:
        fprintf(f, "%s", vt->typeName);
        break;
    }

    if(vt->ptrLevel) {
        fprintf(f, " ");
        for(ct=0; ct < vt->ptrLevel; ct++) {
            fprintf(f, "*");
        }
    }

    if(vt->name[0]) {
        fprintf(f, " %s", vt->name);
    }
}

void printArgList(FILE *f, const ApiEntry * api, int assumePrevious)
{
    int ct;
    for(ct=0; ct < api->paramCount; ct++) {
        if (ct || assumePrevious) {
            fprintf(f, ", ");
        }
        printVarType(f, &api->params[ct]);
    }
}

void printStructures(FILE *f)
{
    int ct;
    int ct2;

    for(ct=0; ct < apiCount; ct++) {
        fprintf(f, "typedef struct RS_CMD_%s_rec RS_CMD_%s;\n", apis[ct].name, apis[ct].name);
    }
    fprintf(f, "\n");

    for(ct=0; ct < apiCount; ct++) {
        const ApiEntry * api = &apis[ct];
        fprintf(f, "#define RS_CMD_ID_%s %i\n", api->name, ct+1);
        fprintf(f, "struct RS_CMD_%s_rec {\n", api->name);
        //fprintf(f, "    RsCommandHeader _hdr;\n");

        for(ct2=0; ct2 < api->paramCount; ct2++) {
            fprintf(f, "    ");
            printVarType(f, &api->params[ct2]);
            fprintf(f, ";\n");
        }
        fprintf(f, "};\n\n");
    }
}

void printFuncDecl(FILE *f, const ApiEntry *api, const char *prefix, int addContext)
{
    printVarType(f, &api->ret);
    fprintf(f, " %s%s (", prefix, api->name);
    if (addContext) {
        fprintf(f, "Context *");
    } else {
        fprintf(f, "RsContext rsc");
    }
    printArgList(f, api, 1);
    fprintf(f, ")");
}

void printFuncDecls(FILE *f, const char *prefix, int addContext)
{
    int ct;
    for(ct=0; ct < apiCount; ct++) {
        printFuncDecl(f, &apis[ct], prefix, addContext);
        fprintf(f, ";\n");
    }
    fprintf(f, "\n\n");
}

void printPlaybackFuncs(FILE *f, const char *prefix)
{
    int ct;
    for(ct=0; ct < apiCount; ct++) {
        fprintf(f, "void %s%s (Context *, const void *);\n", prefix, apis[ct].name);
    }
}

void printApiCpp(FILE *f)
{
    int ct;
    int ct2;

    fprintf(f, "#include \"rsDevice.h\"\n");
    fprintf(f, "#include \"rsContext.h\"\n");
    fprintf(f, "#include \"rsThreadIO.h\"\n");
    //fprintf(f, "#include \"rsgApiStructs.h\"\n");
    fprintf(f, "#include \"rsgApiFuncDecl.h\"\n");
    fprintf(f, "\n");
    fprintf(f, "using namespace android;\n");
    fprintf(f, "using namespace android::renderscript;\n");
    fprintf(f, "#include \"rsHandcode.h\"\n");
    fprintf(f, "\n");

    for(ct=0; ct < apiCount; ct++) {
        int needFlush = 0;
        const ApiEntry * api = &apis[ct];

        printFuncDecl(f, api, "rs", 0);
        fprintf(f, "\n{\n");
        if (api->handcodeApi) {
            fprintf(f, "    rsHCAPI_%s(rsc", api->name);
            for(ct2=0; ct2 < api->paramCount; ct2++) {
                const VarType *vt = &api->params[ct2];
                fprintf(f, ", %s", vt->name);
            }
            fprintf(f, ");\n");
        } else {
            fprintf(f, "    ThreadIO *io = &((Context *)rsc)->mIO;\n");
            //fprintf(f, "    LOGE(\"add command %s\\n\");\n", api->name);
            fprintf(f, "    RS_CMD_%s *cmd = static_cast<RS_CMD_%s *>(io->mToCore.reserve(sizeof(RS_CMD_%s)));\n", api->name, api->name, api->name);
            fprintf(f, "    uint32_t size = sizeof(RS_CMD_%s);\n", api->name);

            for(ct2=0; ct2 < api->paramCount; ct2++) {
                const VarType *vt = &api->params[ct2];
                needFlush += vt->ptrLevel;
                fprintf(f, "    cmd->%s = %s;\n", vt->name, vt->name);
            }
            if (api->ret.typeName[0]) {
                needFlush = 1;
            }

            fprintf(f, "    io->mToCore.commit");
            if (needFlush) {
                fprintf(f, "Sync");
            }
            fprintf(f, "(RS_CMD_ID_%s, size);\n", api->name);

            if (api->ret.typeName[0]) {
                fprintf(f, "    return reinterpret_cast<");
                printVarType(f, &api->ret);
                fprintf(f, ">(io->mToCoreRet);\n");
            }
        }
        fprintf(f, "};\n\n");
    }
}

void printPlaybackCpp(FILE *f)
{
    int ct;
    int ct2;

    fprintf(f, "#include \"rsDevice.h\"\n");
    fprintf(f, "#include \"rsContext.h\"\n");
    fprintf(f, "#include \"rsThreadIO.h\"\n");
    //fprintf(f, "#include \"rsgApiStructs.h\"\n");
    fprintf(f, "#include \"rsgApiFuncDecl.h\"\n");
    fprintf(f, "\n");
    fprintf(f, "namespace android {\n");
    fprintf(f, "namespace renderscript {\n");
    fprintf(f, "#include \"rsHandcode.h\"\n");
    fprintf(f, "\n");

    for(ct=0; ct < apiCount; ct++) {
        const ApiEntry * api = &apis[ct];

        fprintf(f, "void rsp_%s(Context *con, const void *vp)\n", api->name);
        fprintf(f, "{\n");
        if (api->handcodePlay) {
            fprintf(f, "    rsHCPLAY_%s(con, vp);\n", api->name);
        } else {
            //fprintf(f, "    LOGE(\"play command %s\\n\");\n", api->name);
            fprintf(f, "    const RS_CMD_%s *cmd = static_cast<const RS_CMD_%s *>(vp);\n", api->name, api->name);
            fprintf(f, "    ");
            if (api->ret.typeName[0]) {
                fprintf(f, "con->mIO.mToCoreRet = (intptr_t)");
            }
            fprintf(f, "rsi_%s(con", api->name);
            for(ct2=0; ct2 < api->paramCount; ct2++) {
                const VarType *vt = &api->params[ct2];
                fprintf(f, ",\n           cmd->%s", vt->name);
            }
            fprintf(f, ");\n");
        }
        fprintf(f, "};\n\n");
    }

    fprintf(f, "RsPlaybackFunc gPlaybackFuncs[] = {\n");
    fprintf(f, "    NULL,\n");
    for(ct=0; ct < apiCount; ct++) {
        fprintf(f, "    %s%s,\n", "rsp_", apis[ct].name);
    }
    fprintf(f, "};\n");

    fprintf(f, "};\n");
    fprintf(f, "};\n");
}

int main(int argc, char **argv)
{
    if (argc != 3) {
        fprintf(stderr, "usage: %s commandFile outFile\n", argv[0]);
        return 1;
    }
    const char* rsgFile = argv[1];
    const char* outFile = argv[2];
    FILE* input = fopen(rsgFile, "r");

    char choice = fgetc(input);
    fclose(input);

    if (choice < '0' || choice > '3') {
        fprintf(stderr, "Uknown command: \'%c\'\n", choice);
        return -2;
    }

    yylex();
    // printf("# of lines = %d\n", num_lines);

    FILE *f = fopen(outFile, "w");

    printFileHeader(f);
    switch(choice) {
        case '0': // rsgApiStructs.h
        {
            fprintf(f, "\n");
            fprintf(f, "#include \"rsContext.h\"\n");
            fprintf(f, "\n");
            fprintf(f, "namespace android {\n");
            fprintf(f, "namespace renderscript {\n");
            printStructures(f);
            printFuncDecls(f, "rsi_", 1);
            printPlaybackFuncs(f, "rsp_");
            fprintf(f, "\n\ntypedef void (*RsPlaybackFunc)(Context *, const void *);\n");
            fprintf(f, "extern RsPlaybackFunc gPlaybackFuncs[];\n");

            fprintf(f, "}\n");
            fprintf(f, "}\n");
        }
        break;

        case '1': // rsgApiFuncDecl.h
        {
            printFuncDecls(f, "rs", 0);
        }
        break;

        case '2': // rsgApi.cpp
        {
            printApiCpp(f);
        }
        break;

        case '3': // rsgApiReplay.cpp
        {
            printFileHeader(f);
            printPlaybackCpp(f);
        }
        break;
    }
    fclose(f);
    return 0;
}