sde.c

This is a resource based on j2me embedded,if you dont understand,you can connection with me .

            new_stratumTableSize = stratumTableSize == 0?
                                  INIT_SIZE_STRATUM :
                                  stratumTableSize * 2;
            allocSize = new_stratumTableSize * (int)sizeof(StratumTableRecord);
            new_stratumTable = jvmtiAllocate((jint)allocSize);
            if ( new_stratumTable == NULL ) {
                EXIT_ERROR(AGENT_ERROR_OUT_OF_MEMORY, "SDE stratum table");
            }
            if ( stratumTable!=NULL ) {
                (void)memcpy(new_stratumTable, stratumTable,
                        stratumTableSize * (int)sizeof(StratumTableRecord));
                jvmtiDeallocate(stratumTable);
            }
            stratumTable     = new_stratumTable;
            stratumTableSize = new_stratumTableSize;
        }
    }

    private String readLine(void) {
        char *initialPos;
        char ch;

        ignoreWhite();
        initialPos = sdePos;
        while (((ch = *sdePos) != '\n') && (ch != '\r')) {
            if (ch == 0) {
                syntax("unexpected EOF");
            }
            ++sdePos;
        }
        *sdePos++ = 0; /* null terminate string - mangles SDE */

        /* check for CR LF */
        if ((ch == '\r') && (*sdePos == '\n')) {
            ++sdePos;
        }
        ignoreWhite(); /* leading white */
        return initialPos;
    }

    private int defaultStratumTableIndex(void) {
        if ((defaultStratumIndex == -1) && (defaultStratumId != null)) {
            defaultStratumIndex = 
                stratumTableIndex(defaultStratumId);
        }
        return defaultStratumIndex;
    }   

    private int stratumTableIndex(String stratumId) {
        int i;

        if (stratumId == null) {
            return defaultStratumTableIndex();
        }
        for (i = 0; i < (stratumIndex-1); ++i) {
            if (strcmp(stratumTable[i].id, stratumId) == 0) {
                return i;
            }
        }
        return defaultStratumTableIndex();
    }   


/*****************************
 * below functions/methods are written to compile under either Java or C
 * 
 * Needed support functions:
 *   sdePeek()
 *   sdeRead()
 *   sdeAdvance()
 *   readLine()
 *   assureLineTableSize()
 *   assureFileTableSize()
 *   assureStratumTableSize()
 *   syntax(String)
 *
 *   stratumTableIndex(String)
 *
 * Needed support variables:
 *   lineTable
 *   lineIndex
 *   fileTable
 *   fileIndex
 *   currentFileId
 *
 * Needed types:
 *   String
 *
 * Needed constants:
 *   NullString
 */

    private void ignoreWhite(void) {
        char ch;

        while (((ch = sdePeek()) == ' ') || (ch == '\t')) {
            sdeAdvance();
        }
    }

    private void ignoreLine(void) {
        char ch;

        do {
           ch = sdeRead();
        } while ((ch != '\n') && (ch != '\r'));
        
        /* check for CR LF */
        if ((ch == '\r') && (sdePeek() == '\n')) {
            sdeAdvance();
        }
        ignoreWhite(); /* leading white */
    }

    private int readNumber(void) {
        int value = 0;
        char ch;

        ignoreWhite();
        while (((ch = sdePeek()) >= '0') && (ch <= '9')) {
            sdeAdvance();
            value = (value * 10) + ch - '0';
        }
        ignoreWhite();
        return value;
    }

    private void storeFile(int fileId, String sourceName, String sourcePath) {
        assureFileTableSize();
        fileTable[fileIndex].fileId = fileId;
        fileTable[fileIndex].sourceName = sourceName;
        fileTable[fileIndex].sourcePath = sourcePath;
        ++fileIndex;
    }

    private void fileLine(void) {
        int hasAbsolute = 0; /* acts as boolean */
        int fileId;
        String sourceName;
        String sourcePath = null;

        /* is there an absolute filename? */
        if (sdePeek() == '+') {
            sdeAdvance();
            hasAbsolute = 1;
        }
        fileId = readNumber();
        sourceName = readLine();
        if (hasAbsolute == 1) {
            sourcePath = readLine();
        }
        storeFile(fileId, sourceName, sourcePath);
    }

    private void storeLine(int jplsStart, int jplsEnd, int jplsLineInc, 
                  int njplsStart, int njplsEnd, int fileId) {
        assureLineTableSize();
        lineTable[lineIndex].jplsStart = jplsStart;
        lineTable[lineIndex].jplsEnd = jplsEnd;
        lineTable[lineIndex].jplsLineInc = jplsLineInc;
        lineTable[lineIndex].njplsStart = njplsStart;
        lineTable[lineIndex].njplsEnd = njplsEnd;
        lineTable[lineIndex].fileId = fileId;
        ++lineIndex;
    }

    /**
     * Parse line translation info.  Syntax is
     *     <NJ-start-line> [ # <file-id> ] [ , <line-count> ] : 
     *                 <J-start-line> [ , <line-increment> ] CR
     */
    private void lineLine(void) {
        int lineCount = 1;
        int lineIncrement = 1;
        int njplsStart;
        int jplsStart;

        njplsStart = readNumber();

        /* is there a fileID? */
        if (sdePeek() == '#') {
            sdeAdvance();
            currentFileId = readNumber();
        }

        /* is there a line count? */
        if (sdePeek() == ',') {
            sdeAdvance();
            lineCount = readNumber();
        }

        if (sdeRead() != ':') {
            syntax("expected ':'");
        }
        jplsStart = readNumber();
        if (sdePeek() == ',') {
            sdeAdvance();
            lineIncrement = readNumber();
        }
        ignoreLine(); /* flush the rest */
        
        storeLine(jplsStart,
                  jplsStart + (lineCount * lineIncrement) -1,
                  lineIncrement,
                  njplsStart,
                  njplsStart + lineCount -1,
                  currentFileId);
    }

    /**
     * Until the next stratum section, everything after this
     * is in stratumId - so, store the current indicies.
     */
    private void storeStratum(String stratumId) {
        /* remove redundant strata */
        if (stratumIndex > 0) {
            if ((stratumTable[stratumIndex-1].fileIndex 
                                            == fileIndex) &&
                (stratumTable[stratumIndex-1].lineIndex 
                                            == lineIndex)) {
                /* nothing changed overwrite it */
                --stratumIndex;
            }
        }
        /* store the results */
        assureStratumTableSize();
        stratumTable[stratumIndex].id = stratumId;
        stratumTable[stratumIndex].fileIndex = fileIndex;
        stratumTable[stratumIndex].lineIndex = lineIndex;
        ++stratumIndex;
        currentFileId = 0;
    }

    /**
     * The beginning of a stratum's info
     */
    private void stratumSection(void) {
        storeStratum(readLine());
    }

    private void fileSection(void) {
        ignoreLine();
        while (sdePeek() != '*') {
            fileLine();
        }
    }

    private void lineSection(void) {
        ignoreLine();
        while (sdePeek() != '*') {
            lineLine();
        }
    }

    /**
     * Ignore a section we don't know about.
     */
    private void ignoreSection(void) {
        ignoreLine();
        while (sdePeek() != '*') {
            ignoreLine();
        }
    }

    /**
     * A base "Java" stratum is always available, though
     * it is not in the SourceDebugExtension.
     * Create the base stratum.
     */
    private void createJavaStratum(void) {
        baseStratumIndex = stratumIndex;
        storeStratum(BASE_STRATUM_NAME);
        storeFile(1, jplsFilename, NullString);
        /* JPL line numbers cannot exceed 65535 */
        storeLine(1, 65536, 1, 1, 65536, 1);
        storeStratum("Aux"); /* in case they don't declare */
    }

    /**
     * Decode a SourceDebugExtension which is in SourceMap format.
     * This is the entry point into the recursive descent parser.
     */
    private void decode(void) {
        /* check for "SMAP" - allow EOF if not ours */
        if (strlen(sourceDebugExtension) <= 4 ||
            (sdeRead() != 'S') ||
            (sdeRead() != 'M') ||
            (sdeRead() != 'A') ||
            (sdeRead() != 'P')) {
            return; /* not our info */
        }
        ignoreLine(); /* flush the rest */
        jplsFilename = readLine();
        defaultStratumId = readLine();
        createJavaStratum();
        while (true) {
            if (sdeRead() != '*') {
                syntax("expected '*'");
            }
            switch (sdeRead()) {
                case 'S': 
                    stratumSection();
                    break;
                case 'F': 
                    fileSection();
                    break;
                case 'L': 
                    lineSection();
                    break;
                case 'E': 
                    /* set end points */
                    storeStratum("*terminator*"); 
                    sourceMapIsValid = true;
                    return;
                default:
                    ignoreSection();
            }
        }
    }

    /***************** query functions ***********************/

    private int stiLineTableIndex(int sti, int jplsLine) {
        int i;
        int lineIndexStart;
        int lineIndexEnd;

        lineIndexStart = stratumTable[sti].lineIndex;
        /* one past end */
        lineIndexEnd = stratumTable[sti+1].lineIndex; 
        for (i = lineIndexStart; i < lineIndexEnd; ++i) {
            if ((jplsLine >= lineTable[i].jplsStart) &&
                            (jplsLine <= lineTable[i].jplsEnd)) {
                return i;
            }
        }
        return -1;
    }

    private int stiLineNumber(int sti, int lti, int jplsLine) {
        return lineTable[lti].njplsStart + 
                (((jplsLine - lineTable[lti].jplsStart) / 
                                   lineTable[lti].jplsLineInc));
    }

#if 0
/* not referenced */
    private int fileTableIndex(int sti, int fileId) {
        int i;
        int fileIndexStart = stratumTable[sti].fileIndex;
        /* one past end */
        int fileIndexEnd = stratumTable[sti+1].fileIndex; 
        for (i = fileIndexStart; i < fileIndexEnd; ++i) {
            if (fileTable[i].fileId == fileId) {
                return i;
            }
        }
        return -1;
    }
    private int stiFileTableIndex(int sti, int lti) {
        return fileTableIndex(sti, lineTable[lti].fileId);
    }
#endif
    private jboolean isValid(void) {
        return sourceMapIsValid;
    }