
#include "sam.h"

#ifdef ESP_PLATFORM
#include <esp_heap_caps.h>
#endif

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "samdebug.h"
#include "render.h"
#include "SamTabs.h"


char input[256]; //tab39445
//standard sam sound
unsigned char speed = 72;
unsigned char pitch = 64;
unsigned char mouth = 128;
unsigned char throat = 128;
int singmode = 0;

extern int debug;

unsigned char mem39;
unsigned char mem44;
unsigned char mem47;
unsigned char mem49;
unsigned char mem50;
unsigned char mem51;
unsigned char mem53;
unsigned char mem56;

unsigned char mem59 = 0;

unsigned char A, X, Y;

unsigned char stress[256];        //numbers from 0 to 8
unsigned char phonemeLength[256]; //tab40160
unsigned char phonemeindex[256];

unsigned char phonemeIndexOutput[60];  //tab47296
unsigned char stressOutput[60];        //tab47365
unsigned char phonemeLengthOutput[60]; //tab47416

// contains the final soundbuffer
int bufferpos = 0;
char *buffer = NULL;

void SetInput(char *_input)
{
    int i, l;
    l = strlen(_input);
    if (l > 254)
        l = 254;
    for (i = 0; i < l; i++)
        input[i] = _input[i];
    input[l] = 0;
}

void SetSpeed(unsigned char _speed) { speed = _speed; }
void SetPitch(unsigned char _pitch) { pitch = _pitch; }
void SetMouth(unsigned char _mouth) { mouth = _mouth; }
void SetThroat(unsigned char _throat) { throat = _throat; }
void EnableSingmode() { singmode = 1; }
void DisableSingmode() { singmode = 0; }
char *GetBuffer() { return buffer; }
int GetBufferLength() { return bufferpos; }
void FreeBuffer() { if (buffer) {free(buffer); buffer = NULL;} }

void Init();
int Parser1();
void Parser2();
int SAMMain();
void CopyStress();
void SetPhonemeLength();
void AdjustLengths();
void Code41240();
void Insert(unsigned char position, unsigned char mem60, unsigned char mem59, unsigned char mem58);
void InsertBreath();
void PrepareOutput();
void SetMouthThroat(unsigned char mouth, unsigned char throat);

// 168=pitches
// 169=frequency1
// 170=frequency2
// 171=frequency3
// 172=amplitude1
// 173=amplitude2
// 174=amplitude3

void Init()
{
    int i;

    // printf("Initialize!\r\n");

    SetMouthThroat(mouth, throat);

    bufferpos = 0;
    // TODO, check for free the memory, 10 seconds of output should be more than enough
    //buffer = (char*)ps_malloc(22050 * 5);
    // switch to ESP-IDF equivalent
#ifdef ESP_PLATFORM
    buffer = (char *)heap_caps_malloc(22050 * 10, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
#else
    buffer = (char *)malloc(22050 * 10);
#endif
    /*
    Due to a technical limitation, the maximum statically allocated DRAM usage is 160KB. 
    The remaining 160KB (for a total of 320KB of DRAM) can only be allocated at runtime as heap.
    https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/mem_alloc.html
    */

    // printf("buffer pointer %d\r\n", buffer);

    /*
    freq2data = &mem[45136];
    freq1data = &mem[45056];
    freq3data = &mem[45216];
    */
    //pitches = &mem[43008];
    /*
    frequency1 = &mem[43264];
    frequency2 = &mem[43520];
    frequency3 = &mem[43776];
    */
    /*
    amplitude1 = &mem[44032];
    amplitude2 = &mem[44288];
    amplitude3 = &mem[44544];
    */
    //phoneme = &mem[39904];
    /*
    ampl1data = &mem[45296];
    ampl2data = &mem[45376];
    ampl3data = &mem[45456];
    */

    for (i = 0; i < 256; i++)
    {
        stress[i] = 0;
        phonemeLength[i] = 0;
    }

    for (i = 0; i < 60; i++)
    {
        phonemeIndexOutput[i] = 0;
        stressOutput[i] = 0;
        phonemeLengthOutput[i] = 0;
    }
    phonemeindex[255] = 255; //to prevent buffer overflow // ML : changed from 32 to 255 to stop freezing with long inputs
}

//int Code39771()
int SAMMain()
{
    Init(); // buffer is allocated here
    phonemeindex[255] = 32; //to prevent buffer overflow

    if (!Parser1())
    {
        FreeBuffer();
        return 0;
    }
    if (debug)
        PrintPhonemes(phonemeindex, phonemeLength, stress);
    Parser2();
    CopyStress();
    SetPhonemeLength();
    AdjustLengths();
    Code41240();
    do
    {
        A = phonemeindex[X];
        if (A > 80)
        {
            phonemeindex[X] = 255;
            break; // error: delete all behind it
        }
        X++;
    } while (X != 0);

    //pos39848:
    InsertBreath();

    //mem[40158] = 255;
    if (debug)
    {
        PrintPhonemes(phonemeindex, phonemeLength, stress);
    }

    PrepareOutput();

    return 1;
}

//void Code48547()
void PrepareOutput()
{
    A = 0;
    X = 0;
    Y = 0;

    //pos48551:
    while (1)
    {
        A = phonemeindex[X];
        if (A == 255)
        {
            A = 255;
            phonemeIndexOutput[Y] = 255;
            Render();
            return;
        }
        if (A == 254)
        {
            X++;
            int temp = X;
            //mem[48546] = X;
            phonemeIndexOutput[Y] = 255;
            Render();
            //X = mem[48546];
            X = temp;
            Y = 0;
            continue;
        }

        if (A == 0)
        {
            X++;
            continue;
        }

        phonemeIndexOutput[Y] = A;
        phonemeLengthOutput[Y] = phonemeLength[X];
        stressOutput[Y] = stress[X];
        X++;
        Y++;
    }
}

//void Code48431()
void InsertBreath()
{
    unsigned char mem54;
    unsigned char mem55;
    unsigned char index; //variable Y
    mem54 = 255;
    X++;
    mem55 = 0;
    unsigned char mem66 = 0;
    while (1)
    {
        //pos48440:
        X = mem66;
        index = phonemeindex[X];
        if (index == 255)
            return;
        mem55 += phonemeLength[X];

        if (mem55 < 232)
        {
            if (index != 254) // ML : Prevents an index out of bounds problem
            {
                A = flags2[index] & 1;
                if (A != 0)
                {
                    X++;
                    mem55 = 0;
                    Insert(X, 254, mem59, 0);
                    mem66++;
                    mem66++;
                    continue;
                }
            }
            if (index == 0)
                mem54 = X;
            mem66++;
            continue;
        }
        X = mem54;
        phonemeindex[X] = 31; // 'Q*' glottal stop
        phonemeLength[X] = 4;
        stress[X] = 0;
        X++;
        mem55 = 0;
        Insert(X, 254, mem59, 0);
        X++;
        mem66 = X;
    }
}

// Iterates through the phoneme buffer, copying the stress value from
// the following phoneme under the following circumstance:

//     1. The current phoneme is voiced, excluding plosives and fricatives
//     2. The following phoneme is voiced, excluding plosives and fricatives, and
//     3. The following phoneme is stressed
//
//  In those cases, the stress value+1 from the following phoneme is copied.
//
// For example, the word LOITER is represented as LOY5TER, with as stress
// of 5 on the diphtong OY. This routine will copy the stress value of 6 (5+1)
// to the L that precedes it.

//void Code41883()
void CopyStress()
{
    // loop thought all the phonemes to be output
    unsigned char pos = 0; //mem66
    while (1)
    {
        // get the phomene
        Y = phonemeindex[pos];

        // exit at end of buffer
        if (Y == 255)
            return;

        // if CONSONANT_FLAG set, skip - only vowels get stress
        if ((flags[Y] & 64) == 0)
        {
            pos++;
            continue;
        }
        // get the next phoneme
        Y = phonemeindex[pos + 1];
        if (Y == 255) //prevent buffer overflow
        {
            pos++;
            continue;
        }
        else
            // if the following phoneme is a vowel, skip
            if ((flags[Y] & 128) == 0)
        {
            pos++;
            continue;
        }

        // get the stress value at the next position
        Y = stress[pos + 1];

        // if next phoneme is not stressed, skip
        if (Y == 0)
        {
            pos++;
            continue;
        }

        // if next phoneme is not a VOWEL OR ER, skip
        if ((Y & 128) != 0)
        {
            pos++;
            continue;
        }

        // copy stress from prior phoneme to this one
        stress[pos] = Y + 1;

        // advance pointer
        pos++;
    }
}

//void Code41014()
void Insert(unsigned char position /*var57*/, unsigned char mem60, unsigned char mem59, unsigned char mem58)
{
    int i;
    for (i = 253; i >= position; i--) // ML : always keep last safe-guarding 255
    {
        phonemeindex[i + 1] = phonemeindex[i];
        phonemeLength[i + 1] = phonemeLength[i];
        stress[i + 1] = stress[i];
    }

    phonemeindex[position] = mem60;
    phonemeLength[position] = mem59;
    stress[position] = mem58;
    return;
}

// The input[] buffer contains a string of phonemes and stress markers along
// the lines of:
//
//     DHAX KAET IHZ AH5GLIY. <0x9B>
//
// The byte 0x9B marks the end of the buffer. Some phonemes are 2 bytes
// long, such as "DH" and "AX". Others are 1 byte long, such as "T" and "Z".
// There are also stress markers, such as "5" and ".".
//
// The first character of the phonemes are stored in the table signInputTable1[].
// The second character of the phonemes are stored in the table signInputTable2[].
// The stress characters are arranged in low to high stress order in stressInputTable[].
//
// The following process is used to parse the input[] buffer:
//
// Repeat until the <0x9B> character is reached:
//
//        First, a search is made for a 2 character match for phonemes that do not
//        end with the '*' (wildcard) character. On a match, the index of the phoneme
//        is added to phonemeIndex[] and the buffer position is advanced 2 bytes.
//
//        If this fails, a search is made for a 1 character match against all
//        phoneme names ending with a '*' (wildcard). If this succeeds, the
//        phoneme is added to phonemeIndex[] and the buffer position is advanced
//        1 byte.
//
//        If this fails, search for a 1 character match in the stressInputTable[].
//        If this succeeds, the stress value is placed in the last stress[] table
//        at the same index of the last added phoneme, and the buffer position is
//        advanced by 1 byte.
//
//        If this fails, return a 0.
//
// On success:
//
//    1. phonemeIndex[] will contain the index of all the phonemes.
//    2. The last index in phonemeIndex[] will be 255.
//    3. stress[] will contain the stress value for each phoneme

// input[] holds the string of phonemes, each two bytes wide
// signInputTable1[] holds the first character of each phoneme
// signInputTable2[] holds te second character of each phoneme
// phonemeIndex[] holds the indexes of the phonemes after parsing input[]
//
// The parser scans through the input[], finding the names of the phonemes
// by searching signInputTable1[] and signInputTable2[]. On a match, it
// copies the index of the phoneme into the phonemeIndexTable[].
//
// The character <0x9B> marks the end of text in input[]. When it is reached,
// the index 255 is placed at the end of the phonemeIndexTable[], and the
// function returns with a 1 indicating success.
int Parser1()
{
    int i;
    unsigned char sign1;
    unsigned char sign2;
    unsigned char position = 0;
    X = 0;
    A = 0;
    Y = 0;

    // CLEAR THE STRESS TABLE
    for (i = 0; i < 256; i++)
        stress[i] = 0;

    // THIS CODE MATCHES THE PHONEME LETTERS TO THE TABLE
    // pos41078:
    while (1)
    {
        // GET THE FIRST CHARACTER FROM THE PHONEME BUFFER
        sign1 = input[X];
        // TEST FOR 155 (�) END OF LINE MARKER
        if (sign1 == 155)
        {
            // MARK ENDPOINT AND RETURN
            phonemeindex[position] = 255; //mark endpoint
            // REACHED END OF PHONEMES, SO EXIT
            return 1; //all ok
        }

        // GET THE NEXT CHARACTER FROM THE BUFFER
        X++;
        sign2 = input[X];

        // NOW sign1 = FIRST CHARACTER OF PHONEME, AND sign2 = SECOND CHARACTER OF PHONEME

        // TRY TO MATCH PHONEMES ON TWO TWO-CHARACTER NAME
        // IGNORE PHONEMES IN TABLE ENDING WITH WILDCARDS

        // SET INDEX TO 0
        Y = 0;
    pos41095:

        // GET FIRST CHARACTER AT POSITION Y IN signInputTable
        // --> should change name to PhonemeNameTable1
        A = signInputTable1[Y];

        // FIRST CHARACTER MATCHES?
        if (A == sign1)
        {
            // GET THE CHARACTER FROM THE PhonemeSecondLetterTable
            A = signInputTable2[Y];
            // NOT A SPECIAL AND MATCHES SECOND CHARACTER?
            if ((A != '*') && (A == sign2))
            {
                // STORE THE INDEX OF THE PHONEME INTO THE phomeneIndexTable
                phonemeindex[position] = Y;

                // ADVANCE THE POINTER TO THE phonemeIndexTable
                position++;
                // ADVANCE THE POINTER TO THE phonemeInputBuffer
                X++;

                // CONTINUE PARSING
                continue;
            }
        }

        // NO MATCH, TRY TO MATCH ON FIRST CHARACTER TO WILDCARD NAMES (ENDING WITH '*')

        // ADVANCE TO THE NEXT POSITION
        Y++;
        // IF NOT END OF TABLE, CONTINUE
        if (Y != 81)
            goto pos41095;

        // REACHED END OF TABLE WITHOUT AN EXACT (2 CHARACTER) MATCH.
        // THIS TIME, SEARCH FOR A 1 CHARACTER MATCH AGAINST THE WILDCARDS

        // RESET THE INDEX TO POINT TO THE START OF THE PHONEME NAME TABLE
        Y = 0;
    pos41134:
        // DOES THE PHONEME IN THE TABLE END WITH '*'?
        if (signInputTable2[Y] == '*')
        {
            // DOES THE FIRST CHARACTER MATCH THE FIRST LETTER OF THE PHONEME
            if (signInputTable1[Y] == sign1)
            {
                // SAVE THE POSITION AND MOVE AHEAD
                phonemeindex[position] = Y;

                // ADVANCE THE POINTER
                position++;

                // CONTINUE THROUGH THE LOOP
                continue;
            }
        }
        Y++;
        if (Y != 81)
            goto pos41134; //81 is size of PHONEME NAME table

        // FAILED TO MATCH WITH A WILDCARD. ASSUME THIS IS A STRESS
        // CHARACTER. SEARCH THROUGH THE STRESS TABLE

        // SET INDEX TO POSITION 8 (END OF STRESS TABLE)
        Y = 8;

        // WALK BACK THROUGH TABLE LOOKING FOR A MATCH
        while ((sign1 != stressInputTable[Y]) && (Y > 0))
        {
            // DECREMENT INDEX
            Y--;
        }

        // REACHED THE END OF THE SEARCH WITHOUT BREAKING OUT OF LOOP?
        if (Y == 0)
        {
            //mem[39444] = X;
            //41181: JSR 42043 //Error
            // FAILED TO MATCH ANYTHING, RETURN 0 ON FAILURE
            return 0;
        }
        // SET THE STRESS FOR THE PRIOR PHONEME
        stress[position - 1] = Y;
    } //while
}

//change phonemelength depedendent on stress
//void Code41203()
void SetPhonemeLength()
{
    unsigned char A;
    int position = 0;
    while (phonemeindex[position] != 255)
    {
        A = stress[position];
        //41218: BMI 41229
        if ((A == 0) || ((A & 128) != 0))
        {
            phonemeLength[position] = phonemeLengthTable[phonemeindex[position]];
        }
        else
        {
            phonemeLength[position] = phonemeStressedLengthTable[phonemeindex[position]];
        }
        position++;
    }
}

void Code41240()
{
    unsigned char pos = 0;

    while (phonemeindex[pos] != 255)
    {
        unsigned char index; //register AC
        X = pos;
        index = phonemeindex[pos];
        if ((flags[index] & 2) == 0)
        {
            pos++;
            continue;
        }
        else if ((flags[index] & 1) == 0)
        {
            Insert(pos + 1, index + 1, phonemeLengthTable[index + 1], stress[pos]);
            Insert(pos + 2, index + 2, phonemeLengthTable[index + 2], stress[pos]);
            pos += 3;
            continue;
        }

        do
        {
            X++;
            A = phonemeindex[X];
        } while (A == 0);

        if (A != 255)
        {
            if ((flags[A] & 8) != 0)
            {
                pos++;
                continue;
            }
            if ((A == 36) || (A == 37))
            {
                pos++;
                continue;
            } // '/H' '/X'
        }

        Insert(pos + 1, index + 1, phonemeLengthTable[index + 1], stress[pos]);
        Insert(pos + 2, index + 2, phonemeLengthTable[index + 2], stress[pos]);
        pos += 3;
    };
}

// Rewrites the phonemes using the following rules:
//
//       <DIPHTONG ENDING WITH WX> -> <DIPHTONG ENDING WITH WX> WX
//       <DIPHTONG NOT ENDING WITH WX> -> <DIPHTONG NOT ENDING WITH WX> YX
//       UL -> AX L
//       UM -> AX M
//       <STRESSED VOWEL> <SILENCE> <STRESSED VOWEL> -> <STRESSED VOWEL> <SILENCE> Q <VOWEL>
//       T R -> CH R
//       D R -> J R
//       <VOWEL> R -> <VOWEL> RX
//       <VOWEL> L -> <VOWEL> LX
//       G S -> G Z
//       K <VOWEL OR DIPHTONG NOT ENDING WITH IY> -> KX <VOWEL OR DIPHTONG NOT ENDING WITH IY>
//       G <VOWEL OR DIPHTONG NOT ENDING WITH IY> -> GX <VOWEL OR DIPHTONG NOT ENDING WITH IY>
//       S P -> S B
//       S T -> S D
//       S K -> S G
//       S KX -> S GX
//       <ALVEOLAR> UW -> <ALVEOLAR> UX
//       CH -> CH CH' (CH requires two phonemes to represent it)
//       J -> J J' (J requires two phonemes to represent it)
//       <UNSTRESSED VOWEL> T <PAUSE> -> <UNSTRESSED VOWEL> DX <PAUSE>
//       <UNSTRESSED VOWEL> D <PAUSE>  -> <UNSTRESSED VOWEL> DX <PAUSE>

//void Code41397()
void Parser2()
{
    if (debug)
        printf("Parser2\r\n");
    unsigned char pos = 0; //mem66;
    unsigned char mem58 = 0;

    // Loop through phonemes
    while (1)
    {
        // SET X TO THE CURRENT POSITION
        X = pos;
        // GET THE PHONEME AT THE CURRENT POSITION
        A = phonemeindex[pos];

        // DEBUG: Print phoneme and index
        if (debug && A != 255)
            printf("%d: %c%c\r\n", X, signInputTable1[A], signInputTable2[A]);

        // Is phoneme pause?
        if (A == 0)
        {
            // Move ahead to the
            pos++;
            continue;
        }

        // If end of phonemes flag reached, exit routine
        if (A == 255)
            return;

        // Copy the current phoneme index to Y
        Y = A;

        // RULE:
        //       <DIPHTONG ENDING WITH WX> -> <DIPHTONG ENDING WITH WX> WX
        //       <DIPHTONG NOT ENDING WITH WX> -> <DIPHTONG NOT ENDING WITH WX> YX
        // Example: OIL, COW

        // Check for DIPHTONG
        if ((flags[A] & 16) == 0)
            goto pos41457;

        // Not a diphthong. Get the stress
        mem58 = stress[pos];

        // End in IY sound?
        A = flags[Y] & 32;

        // If ends with IY, use YX, else use WX
        if (A == 0)
            A = 20;
        else
            A = 21; // 'WX' = 20 'YX' = 21
        //pos41443:
        // Insert at WX or YX following, copying the stress

        if (debug)
            if (A == 20)
                printf("RULE: insert WX following diphtong NOT ending in IY sound\r\n");
        if (debug)
            if (A == 21)
                printf("RULE: insert YX following diphtong ending in IY sound\r\n");
        Insert(pos + 1, A, mem59, mem58);
        X = pos;
        // Jump to ???
        goto pos41749;

    pos41457:

        // RULE:
        //       UL -> AX L
        // Example: MEDDLE

        // Get phoneme
        A = phonemeindex[X];
        // Skip this rule if phoneme is not UL
        if (A != 78)
            goto pos41487; // 'UL'
        A = 24;            // 'L'                 //change 'UL' to 'AX L'

        if (debug)
            printf("RULE: UL -> AX L\r\n");

    pos41466:
        // Get current phoneme stress
        mem58 = stress[X];

        // Change UL to AX
        phonemeindex[X] = 13; // 'AX'
                              // Perform insert. Note code below may jump up here with different values
        Insert(X + 1, A, mem59, mem58);
        pos++;
        // Move to next phoneme
        continue;

    pos41487:

        // RULE:
        //       UM -> AX M
        // Example: ASTRONOMY

        // Skip rule if phoneme != UM
        if (A != 79)
            goto pos41495; // 'UM'
        // Jump up to branch - replaces current phoneme with AX and continues
        A = 27; // 'M'  //change 'UM' to  'AX M'
        if (debug)
            printf("RULE: UM -> AX M\r\n");
        goto pos41466;
    pos41495:

        // RULE:
        //       UN -> AX N
        // Example: FUNCTION

        // Skip rule if phoneme != UN
        if (A != 80)
            goto pos41503; // 'UN'

        // Jump up to branch - replaces current phoneme with AX and continues
        A = 28; // 'N' //change UN to 'AX N'
        if (debug)
            printf("RULE: UN -> AX N\r\n");
        goto pos41466;
    pos41503:

        // RULE:
        //       <STRESSED VOWEL> <SILENCE> <STRESSED VOWEL> -> <STRESSED VOWEL> <SILENCE> Q <VOWEL>
        // EXAMPLE: AWAY EIGHT

        Y = A;
        // VOWEL set?
        A = flags[A] & 128;

        // Skip if not a vowel
        if (A != 0)
        {
            // Get the stress
            A = stress[X];

            // If stressed...
            if (A != 0)
            {
                // Get the following phoneme
                X++;
                A = phonemeindex[X];
                // If following phoneme is a pause

                if (A == 0)
                {
                    // Get the phoneme following pause
                    X++;
                    Y = phonemeindex[X];

                    // Check for end of buffer flag
                    if (Y == 255) //buffer overflow
                                  // ??? Not sure about these flags
                        A = 65 & 128;
                    else
                        // And VOWEL flag to current phoneme's flags
                        A = flags[Y] & 128;

                    // If following phonemes is not a pause
                    if (A != 0)
                    {
                        // If the following phoneme is not stressed
                        A = stress[X];
                        if (A != 0)
                        {
                            // Insert a glottal stop and move forward
                            if (debug)
                                printf("RULE: Insert glottal stop between two stressed vowels with space between them\r\n");
                            // 31 = 'Q'
                            Insert(X, 31, mem59, 0);
                            pos++;
                            continue;
                        }
                    }
                }
            }
        }

        // RULES FOR PHONEMES BEFORE R
        //        T R -> CH R
        // Example: TRACK

        // Get current position and phoneme
        X = pos;
        A = phonemeindex[pos];
        if (A != 23)
            goto pos41611; // 'R'

        // Look at prior phoneme
        X--;
        A = phonemeindex[pos - 1];
        //pos41567:
        if (A == 69) // 'T'
        {
            // Change T to CH
            if (debug)
                printf("RULE: T R -> CH R\r\n");
            phonemeindex[pos - 1] = 42;
            goto pos41779;
        }

        // RULES FOR PHONEMES BEFORE R
        //        D R -> J R
        // Example: DRY

        // Prior phonemes D?
        if (A == 57) // 'D'
        {
            // Change D to J
            phonemeindex[pos - 1] = 44;
            if (debug)
                printf("RULE: D R -> J R\r\n");
            goto pos41788;
        }

        // RULES FOR PHONEMES BEFORE R
        //        <VOWEL> R -> <VOWEL> RX
        // Example: ART

        // If vowel flag is set change R to RX
        A = flags[A] & 128;
        if (debug)
            printf("RULE: R -> RX\r\n");
        if (A != 0)
            phonemeindex[pos] = 18; // 'RX'

        // continue to next phoneme
        pos++;
        continue;

    pos41611:

        // RULE:
        //       <VOWEL> L -> <VOWEL> LX
        // Example: ALL

        // Is phoneme L?
        if (A == 24) // 'L'
        {
            // If prior phoneme does not have VOWEL flag set, move to next phoneme
            if ((flags[phonemeindex[pos - 1]] & 128) == 0)
            {
                pos++;
                continue;
            }
            // Prior phoneme has VOWEL flag set, so change L to LX and move to next phoneme
            if (debug)
                printf("RULE: <VOWEL> L -> <VOWEL> LX\r\n");
            phonemeindex[X] = 19; // 'LX'
            pos++;
            continue;
        }

        // RULE:
        //       G S -> G Z
        //
        // Can't get to fire -
        //       1. The G -> GX rule intervenes
        //       2. Reciter already replaces GS -> GZ

        // Is current phoneme S?
        if (A == 32) // 'S'
        {
            // If prior phoneme is not G, move to next phoneme
            if (phonemeindex[pos - 1] != 60)
            {
                pos++;
                continue;
            }
            // Replace S with Z and move on
            if (debug)
                printf("RULE: G S -> G Z\r\n");
            phonemeindex[pos] = 38; // 'Z'
            pos++;
            continue;
        }

        // RULE:
        //             K <VOWEL OR DIPHTONG NOT ENDING WITH IY> -> KX <VOWEL OR DIPHTONG NOT ENDING WITH IY>
        // Example: COW

        // Is current phoneme K?
        if (A == 72) // 'K'
        {
            // Get next phoneme
            Y = phonemeindex[pos + 1];
            // If at end, replace current phoneme with KX
            if (Y == 255)
                phonemeindex[pos] = 75; // ML : prevents an index out of bounds problem
            else
            {
                // VOWELS AND DIPHTONGS ENDING WITH IY SOUND flag set?
                A = flags[Y] & 32;
                if (debug)
                    if (A == 0)
                        printf("RULE: K <VOWEL OR DIPHTONG NOT ENDING WITH IY> -> KX <VOWEL OR DIPHTONG NOT ENDING WITH IY>\r\n");
                // Replace with KX
                if (A == 0)
                    phonemeindex[pos] = 75; // 'KX'
            }
        }
        else

            // RULE:
            //             G <VOWEL OR DIPHTONG NOT ENDING WITH IY> -> GX <VOWEL OR DIPHTONG NOT ENDING WITH IY>
            // Example: GO

            // Is character a G?
            if (A == 60) // 'G'
        {
            // Get the following character
            unsigned char index = phonemeindex[pos + 1];

            // At end of buffer?
            if (index == 255) //prevent buffer overflow
            {
                pos++;
                continue;
            }
            else
                // If diphtong ending with YX, move continue processing next phoneme
                if ((flags[index] & 32) != 0)
            {
                pos++;
                continue;
            }
            // replace G with GX and continue processing next phoneme
            if (debug)
                printf("RULE: G <VOWEL OR DIPHTONG NOT ENDING WITH IY> -> GX <VOWEL OR DIPHTONG NOT ENDING WITH IY>\r\n");
            phonemeindex[pos] = 63; // 'GX'
            pos++;
            continue;
        }

        // RULE:
        //      S P -> S B
        //      S T -> S D
        //      S K -> S G
        //      S KX -> S GX
        // Examples: SPY, STY, SKY, SCOWL

        Y = phonemeindex[pos];
        //pos41719:
        // Replace with softer version?
        A = flags[Y] & 1;
        if (A == 0)
            goto pos41749;
        A = phonemeindex[pos - 1];
        if (A != 32) // 'S'
        {
            A = Y;
            goto pos41812;
        }
        // Replace with softer version
        if (debug)
            printf("RULE: S* %c%c -> S* %c%c\r\n", signInputTable1[Y], signInputTable2[Y], signInputTable1[Y - 12], signInputTable2[Y - 12]);
        phonemeindex[pos] = Y - 12;
        pos++;
        continue;

    pos41749:

        // RULE:
        //      <ALVEOLAR> UW -> <ALVEOLAR> UX
        //
        // Example: NEW, DEW, SUE, ZOO, THOO, TOO

        //       UW -> UX

        A = phonemeindex[X];
        if (A == 53) // 'UW'
        {
            // ALVEOLAR flag set?
            Y = phonemeindex[X - 1];
            A = flags2[Y] & 4;
            // If not set, continue processing next phoneme
            if (A == 0)
            {
                pos++;
                continue;
            }
            if (debug)
                printf("RULE: <ALVEOLAR> UW -> <ALVEOLAR> UX\r\n");
            phonemeindex[X] = 16;
            pos++;
            continue;
        }
    pos41779:

        // RULE:
        //       CH -> CH CH' (CH requires two phonemes to represent it)
        // Example: CHEW

        if (A == 42) // 'CH'
        {
            //        pos41783:
            if (debug)
                printf("CH -> CH CH+1\r\n");
            Insert(X + 1, A + 1, mem59, stress[X]);
            pos++;
            continue;
        }

    pos41788:

        // RULE:
        //       J -> J J' (J requires two phonemes to represent it)
        // Example: JAY

        if (A == 44) // 'J'
        {
            if (debug)
                printf("J -> J J+1\r\n");
            Insert(X + 1, A + 1, mem59, stress[X]);
            pos++;
            continue;
        }

    // Jump here to continue
    pos41812:

        // RULE: Soften T following vowel
        // NOTE: This rule fails for cases such as "ODD"
        //       <UNSTRESSED VOWEL> T <PAUSE> -> <UNSTRESSED VOWEL> DX <PAUSE>
        //       <UNSTRESSED VOWEL> D <PAUSE>  -> <UNSTRESSED VOWEL> DX <PAUSE>
        // Example: PARTY, TARDY

        // Past this point, only process if phoneme is T or D

        if (A != 69) // 'T'
            if (A != 57)
            {
                pos++;
                continue;
            } // 'D'
        //pos41825:

        // If prior phoneme is not a vowel, continue processing phonemes
        if ((flags[phonemeindex[X - 1]] & 128) == 0)
        {
            pos++;
            continue;
        }

        // Get next phoneme
        X++;
        A = phonemeindex[X];
        //pos41841
        // Is the next phoneme a pause?
        if (A != 0)
        {
            // If next phoneme is not a pause, continue processing phonemes
            if ((flags[A] & 128) == 0)
            {
                pos++;
                continue;
            }
            // If next phoneme is stressed, continue processing phonemes
            // FIXME: How does a pause get stressed?
            if (stress[X] != 0)
            {
                pos++;
                continue;
            }
            //pos41856:
            // Set phonemes to DX
            if (debug)
                printf("RULE: Soften T or D following vowel or ER and preceding a pause -> DX\r\n");
            phonemeindex[pos] = 30; // 'DX'
        }
        else
        {
            A = phonemeindex[X + 1];
            if (A == 255) //prevent buffer overflow
                A = 65 & 128;
            else
                // Is next phoneme a vowel or ER?
                A = flags[A] & 128;
            if (debug)
                if (A != 0)
                    printf("RULE: Soften T or D following vowel or ER and preceding a pause -> DX\r\n");
            if (A != 0)
                phonemeindex[pos] = 30; // 'DX'
        }

        pos++;

    } // while
}

// Applies various rules that adjust the lengths of phonemes
//
//         Lengthen <FRICATIVE> or <VOICED> between <VOWEL> and <PUNCTUATION> by 1.5
//         <VOWEL> <RX | LX> <CONSONANT> - decrease <VOWEL> length by 1
//         <VOWEL> <UNVOICED PLOSIVE> - decrease vowel by 1/8th
//         <VOWEL> <UNVOICED CONSONANT> - increase vowel by 1/2 + 1
//         <NASAL> <STOP CONSONANT> - set nasal = 5, consonant = 6
//         <VOICED STOP CONSONANT> {optional silence} <STOP CONSONANT> - shorten both to 1/2 + 1
//         <LIQUID CONSONANT> <DIPHTONG> - decrease by 2

//void Code48619()
void AdjustLengths()
{

    // LENGTHEN VOWELS PRECEDING PUNCTUATION
    //
    // Search for punctuation. If found, back up to the first vowel, then
    // process all phonemes between there and up to (but not including) the punctuation.
    // If any phoneme is found that is a either a fricative or voiced, the duration is
    // increased by (length * 1.5) + 1

    // loop index
    X = 0;
    unsigned char index;

    // iterate through the phoneme list
    unsigned char loopIndex = 0;
    while (1)
    {
        // get a phoneme
        index = phonemeindex[X];

        // exit loop if end on buffer token
        if (index == 255)
            break;

        // not punctuation?
        if ((flags2[index] & 1) == 0)
        {
            // skip
            X++;
            continue;
        }

        // hold index
        loopIndex = X;

        // Loop backwards from this point
    pos48644:

        // back up one phoneme
        X--;

        // stop once the beginning is reached
        if (X == 0)
            break;

        // get the preceding phoneme
        index = phonemeindex[X];

        if (index != 255) //inserted to prevent access overrun
            if ((flags[index] & 128) == 0)
                goto pos48644; // if not a vowel, continue looping

        //pos48657:
        do
        {
            // test for vowel
            index = phonemeindex[X];

            if (index != 255) //inserted to prevent access overrun
                // test for fricative/unvoiced or not voiced
                if (((flags2[index] & 32) == 0) || ((flags[index] & 4) != 0)) //nochmal �berpr�fen
                {
                    //A = flags[Y] & 4;
                    //if(A == 0) goto pos48688;

                    // get the phoneme length
                    A = phonemeLength[X];

                    // change phoneme length to (length * 1.5) + 1
                    A = (A >> 1) + A + 1;
                    if (debug)
                        printf("RULE: Lengthen <FRICATIVE> or <VOICED> between <VOWEL> and <PUNCTUATION> by 1.5\r\n");
                    if (debug)
                        printf("PRE\r\n");
                    if (debug)
                        printf("phoneme %d (%c%c) length %d\r\n", X, signInputTable1[phonemeindex[X]], signInputTable2[phonemeindex[X]], phonemeLength[X]);

                    phonemeLength[X] = A;

                    if (debug)
                        printf("POST\r\n");
                    if (debug)
                        printf("phoneme %d (%c%c) length %d\r\n", X, signInputTable1[phonemeindex[X]], signInputTable2[phonemeindex[X]], phonemeLength[X]);
                }
            // keep moving forward
            X++;
        } while (X != loopIndex);
        //  if (X != loopIndex) goto pos48657;
        X++;
    } // while

    // Similar to the above routine, but shorten vowels under some circumstances

    // Loop throught all phonemes
    loopIndex = 0;
    //pos48697

    while (1)
    {
        // get a phoneme
        X = loopIndex;
        index = phonemeindex[X];

        // exit routine at end token
        if (index == 255)
            return;

        // vowel?
        A = flags[index] & 128;
        if (A != 0)
        {
            // get next phoneme
            X++;
            index = phonemeindex[X];

            // get flags
            if (index == 255)
                mem56 = 65; // use if end marker
            else
                mem56 = flags[index];

            // not a consonant
            /// @todo code above check if index == 255, if it is, then flags[index] is out of bounds
            if ((flags[index] & 64) == 0)
            {
                // RX or LX?
                if ((index == 18) || (index == 19)) // 'RX' & 'LX'
                {
                    // get the next phoneme
                    X++;
                    index = phonemeindex[X];

                    // next phoneme a consonant?
                    if ((flags[index] & 64) != 0)
                    {
                        // RULE: <VOWEL> RX | LX <CONSONANT>

                        if (debug)
                            printf("RULE: <VOWEL> <RX | LX> <CONSONANT> - decrease length by 1\r\n");
                        if (debug)
                            printf("PRE\r\n");
                        if (debug)
                            printf("phoneme %d (%c%c) length %d\r\n", loopIndex, signInputTable1[phonemeindex[loopIndex]], signInputTable2[phonemeindex[loopIndex]], phonemeLength[loopIndex]);

                        // decrease length of vowel by 1 frame
                        phonemeLength[loopIndex]--;

                        if (debug)
                            printf("POST\r\n");
                        if (debug)
                            printf("phoneme %d (%c%c) length %d\r\n", loopIndex, signInputTable1[phonemeindex[loopIndex]], signInputTable2[phonemeindex[loopIndex]], phonemeLength[loopIndex]);
                    }
                    // move ahead
                    loopIndex++;
                    continue;
                }
                // move ahead
                loopIndex++;
                continue;
            }

            // Got here if not <VOWEL>

            // not voiced
            if ((mem56 & 4) == 0)
            {

                // Unvoiced
                // *, .*, ?*, ,*, -*, DX, S*, SH, F*, TH, /H, /X, CH, P*, T*, K*, KX

                // not an unvoiced plosive?
                if ((mem56 & 1) == 0)
                {
                    // move ahead
                    loopIndex++;
                    continue;
                }

                // P*, T*, K*, KX

                // RULE: <VOWEL> <UNVOICED PLOSIVE>
                // <VOWEL> <P*, T*, K*, KX>

                // move back
                X--;

                if (debug)
                    printf("RULE: <VOWEL> <UNVOICED PLOSIVE> - decrease vowel by 1/8th\r\n");
                if (debug)
                    printf("PRE\r\n");
                if (debug)
                    printf("phoneme %d (%c%c) length %d\r\n", X, signInputTable1[phonemeindex[X]], signInputTable2[phonemeindex[X]], phonemeLength[X]);

                // decrease length by 1/8th
                mem56 = phonemeLength[X] >> 3;
                phonemeLength[X] -= mem56;

                if (debug)
                    printf("POST\r\n");
                if (debug)
                    printf("phoneme %d (%c%c) length %d\r\n", X, signInputTable1[phonemeindex[X]], signInputTable2[phonemeindex[X]], phonemeLength[X]);

                // move ahead
                loopIndex++;
                continue;
            }

            // RULE: <VOWEL> <VOICED CONSONANT>
            // <VOWEL> <WH, R*, L*, W*, Y*, M*, N*, NX, DX, Q*, Z*, ZH, V*, DH, J*, B*, D*, G*, GX>

            if (debug)
                printf("RULE: <VOWEL> <VOICED CONSONANT> - increase vowel by 1/2 + 1\r\n");
            if (debug)
                printf("PRE\r\n");
            if (debug)
                printf("phoneme %d (%c%c) length %d\r\n", X - 1, signInputTable1[phonemeindex[X - 1]], signInputTable2[phonemeindex[X - 1]], phonemeLength[X - 1]);

            // decrease length
            A = phonemeLength[X - 1];
            phonemeLength[X - 1] = (A >> 2) + A + 1; // 5/4*A + 1

            if (debug)
                printf("POST\r\n");
            if (debug)
                printf("phoneme %d (%c%c) length %d\r\n", X - 1, signInputTable1[phonemeindex[X - 1]], signInputTable2[phonemeindex[X - 1]], phonemeLength[X - 1]);

            // move ahead
            loopIndex++;
            continue;
        }

        // WH, R*, L*, W*, Y*, M*, N*, NX, Q*, Z*, ZH, V*, DH, J*, B*, D*, G*, GX

        //pos48821:

        // RULE: <NASAL> <STOP CONSONANT>
        //       Set punctuation length to 6
        //       Set stop consonant length to 5

        // nasal?
        if ((flags2[index] & 8) != 0)
        {

            // M*, N*, NX,

            // get the next phoneme
            X++;
            index = phonemeindex[X];

            // end of buffer?
            if (index == 255)
                A = 65 & 2; //prevent buffer overflow
            else
                A = flags[index] & 2; // check for stop consonant

            // is next phoneme a stop consonant?
            if (A != 0)

            // B*, D*, G*, GX, P*, T*, K*, KX

            {
                if (debug)
                    printf("RULE: <NASAL> <STOP CONSONANT> - set nasal = 5, consonant = 6\r\n");
                if (debug)
                    printf("POST\r\n");
                if (debug)
                    printf("phoneme %d (%c%c) length %d\r\n", X, signInputTable1[phonemeindex[X]], signInputTable2[phonemeindex[X]], phonemeLength[X]);
                if (debug)
                    printf("phoneme %d (%c%c) length %d\r\n", X - 1, signInputTable1[phonemeindex[X - 1]], signInputTable2[phonemeindex[X - 1]], phonemeLength[X - 1]);

                // set stop consonant length to 6
                phonemeLength[X] = 6;

                // set nasal length to 5
                phonemeLength[X - 1] = 5;

                if (debug)
                    printf("POST\r\n");
                if (debug)
                    printf("phoneme %d (%c%c) length %d\r\n", X, signInputTable1[phonemeindex[X]], signInputTable2[phonemeindex[X]], phonemeLength[X]);
                if (debug)
                    printf("phoneme %d (%c%c) length %d\r\n", X - 1, signInputTable1[phonemeindex[X - 1]], signInputTable2[phonemeindex[X - 1]], phonemeLength[X - 1]);
            }
            // move to next phoneme
            loopIndex++;
            continue;
        }

        // WH, R*, L*, W*, Y*, Q*, Z*, ZH, V*, DH, J*, B*, D*, G*, GX

        // RULE: <VOICED STOP CONSONANT> {optional silence} <STOP CONSONANT>
        //       Shorten both to (length/2 + 1)

        // (voiced) stop consonant?
        if ((flags[index] & 2) != 0)
        {
            // B*, D*, G*, GX

            // move past silence
            do
            {
                // move ahead
                X++;
                index = phonemeindex[X];
            } while (index == 0);

            // check for end of buffer
            if (index == 255) //buffer overflow
            {
                // ignore, overflow code
                if ((65 & 2) == 0)
                {
                    loopIndex++;
                    continue;
                }
            }
            else if ((flags[index] & 2) == 0)
            {
                // if another stop consonant, move ahead
                loopIndex++;
                continue;
            }

            // RULE: <UNVOICED STOP CONSONANT> {optional silence} <STOP CONSONANT>
            if (debug)
                printf("RULE: <UNVOICED STOP CONSONANT> {optional silence} <STOP CONSONANT> - shorten both to 1/2 + 1\r\n");
            if (debug)
                printf("PRE\r\n");
            if (debug)
                printf("phoneme %d (%c%c) length %d\r\n", X, signInputTable1[phonemeindex[X]], signInputTable2[phonemeindex[X]], phonemeLength[X]);
            if (debug)
                printf("phoneme %d (%c%c) length %d\r\n", X - 1, signInputTable1[phonemeindex[X - 1]], signInputTable2[phonemeindex[X - 1]], phonemeLength[X - 1]);
            // X gets overwritten, so hold prior X value for debug statement
            int debugX = X;
            // shorten the prior phoneme length to (length/2 + 1)
            phonemeLength[X] = (phonemeLength[X] >> 1) + 1;
            X = loopIndex;

            // also shorten this phoneme length to (length/2 +1)
            phonemeLength[loopIndex] = (phonemeLength[loopIndex] >> 1) + 1;

            if (debug)
                printf("POST\r\n");
            if (debug)
                printf("phoneme %d (%c%c) length %d\r\n", debugX, signInputTable1[phonemeindex[debugX]], signInputTable2[phonemeindex[debugX]], phonemeLength[debugX]);
            if (debug)
                printf("phoneme %d (%c%c) length %d\r\n", debugX - 1, signInputTable1[phonemeindex[debugX - 1]], signInputTable2[phonemeindex[debugX - 1]], phonemeLength[debugX - 1]);

            // move ahead
            loopIndex++;
            continue;
        }

        // WH, R*, L*, W*, Y*, Q*, Z*, ZH, V*, DH, J*, **,

        // RULE: <VOICED NON-VOWEL> <DIPHTONG>
        //       Decrease <DIPHTONG> by 2

        // liquic consonant?
        if ((flags2[index] & 16) != 0)
        {
            // R*, L*, W*, Y*

            // get the prior phoneme
            index = phonemeindex[X - 1];

            // prior phoneme a stop consonant>
            if ((flags[index] & 2) != 0)
            {
                // Rule: <LIQUID CONSONANT> <DIPHTONG>

                if (debug)
                    printf("RULE: <LIQUID CONSONANT> <DIPHTONG> - decrease by 2\r\n");
                if (debug)
                    printf("PRE\r\n");
                if (debug)
                    printf("phoneme %d (%c%c) length %d\r\n", X, signInputTable1[phonemeindex[X]], signInputTable2[phonemeindex[X]], phonemeLength[X]);

                // decrease the phoneme length by 2 frames (20 ms)
                phonemeLength[X] -= 2;

                if (debug)
                    printf("POST\r\n");
                if (debug)
                    printf("phoneme %d (%c%c) length %d\r\n", X, signInputTable1[phonemeindex[X]], signInputTable2[phonemeindex[X]], phonemeLength[X]);
            }
        }

        // move to next phoneme
        loopIndex++;
        continue;
    }
    //            goto pos48701;
}

// -------------------------------------------------------------------------
// ML : Code47503 is division with remainder, and mem50 gets the sign
void Code47503(unsigned char mem52)
{

    Y = 0;
    if ((mem53 & 128) != 0)
    {
        mem53 = -mem53;
        Y = 128;
    }
    mem50 = Y;
    A = 0;
    for (X = 8; X > 0; X--)
    {
        int temp = mem53;
        mem53 = mem53 << 1;
        A = A << 1;
        if (temp >= 128)
            A++;
        if (A >= mem52)
        {
            A = A - mem52;
            mem53++;
        }
    }

    mem51 = A;
    if ((mem50 & 128) != 0)
        mem53 = -mem53;
}
