SDCard.cpp

/*
    This file is part of Repetier-Firmware.

    Repetier-Firmware is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Repetier-Firmware is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Repetier-Firmware.  If not, see <http://www.gnu.org/licenses/>.

    This firmware is a nearly complete rewrite of the sprinter firmware
    by kliment (https://github.com/kliment/Sprinter)
    which based on Tonokip RepRap firmware rewrite based off of Hydra-mmm firmware.
*/

#include "Repetier.h"

#if SDSUPPORT

char tempLongFilename[LONG_FILENAME_LENGTH + 1];
char fullName[LONG_FILENAME_LENGTH * SD_MAX_FOLDER_DEPTH + SD_MAX_FOLDER_DEPTH + 1];
#if NEW_COMMUNICATION
SDCardGCodeSource sdSource;
#endif
SDCard sd;

SDCard::SDCard() {
    sdmode = 0;
    sdactive = false;
    savetosd = false;
    Printer::setAutomount(false);
}

void SDCard::automount() {
#if SDCARDDETECT > -1
    if(READ(SDCARDDETECT) != SDCARDDETECTINVERTED) {
        if(sdactive || sdmode == 100) { // Card removed
            Com::printFLN(PSTR("SD card removed"));
#if UI_DISPLAY_TYPE != NO_DISPLAY
            uid.executeAction(UI_ACTION_TOP_MENU, true);
#endif
            unmount();
            UI_STATUS_UPD_F(Com::translatedF(UI_TEXT_SD_REMOVED_ID));
        }
    } else {
        if(!sdactive && sdmode != 100) {
            UI_STATUS_UPD_F(Com::translatedF(UI_TEXT_SD_INSERTED_ID));
            mount();
            if(sdmode != 100) // send message only if we have success
                Com::printFLN(PSTR("SD card inserted")); // Not translatable or host will not understand signal
#if UI_DISPLAY_TYPE != NO_DISPLAY
            if(sdactive && !uid.isWizardActive()) { // Wizards have priority
                Printer::setAutomount(true);
                uid.executeAction(UI_ACTION_SD_PRINT + UI_ACTION_TOPMENU, true);
            }
#endif
        }
    }
#endif
}

void SDCard::initsd() {
    sdactive = false;
#if SDSS > -1
#if SDCARDDETECT > -1
    if(READ(SDCARDDETECT) != SDCARDDETECTINVERTED)
        return;
#endif
    HAL::pingWatchdog();
    HAL::delayMilliseconds(50); // wait for stabilization of contacts, bootup ...
#if defined(ENABLE_SOFTWARE_SPI_CLASS) && ENABLE_SOFTWARE_SPI_CLASS
	fat.begin(SDSS);
#else
	fat.begin(SDSS, SD_SCK_MHZ(4)); // dummy init of SD_CARD
#endif
    HAL::delayMilliseconds(50);       // wait for init end
    HAL::pingWatchdog();
    /*if(dir[0].isOpen())
        dir[0].close();*/
    if (!fat.begin(SDSS, SD_SCK_MHZ(4))) {
        Com::printFLN(Com::tSDInitFail);
        sdmode = 100; // prevent automount loop!
        if (fat.card()->errorCode()) {
            Com::printFLN(PSTR(
                              "\nSD initialization failed.\n"
                              "Do not reformat the card!\n"
                              "Is the card correctly inserted?\n"
                              "Is chipSelect set to the correct value?\n"
                              "Does another SPI device need to be disabled?\n"
                              "Is there a wiring/soldering problem?"));
            Com::printFLN(PSTR("errorCode: "), int(fat.card()->errorCode()));
            return;
        }
        if (fat.vol()->fatType() == 0) {
            Com::printFLN(PSTR("Can't find a valid FAT16/FAT32 partition.\n"));
            return;
        }
        if (!fat.vwd()->isOpen()) {
            Com::printFLN(PSTR("Can't open root directory.\n"));
            return;
        }
        return;
    }
    Com::printFLN(PSTR("Card successfully initialized."));
    sdactive = true;
    Printer::setMenuMode(MENU_MODE_SD_MOUNTED, true);
    HAL::pingWatchdog();

    fat.chdir();

#if defined(EEPROM_AVAILABLE) && EEPROM_AVAILABLE == EEPROM_SDCARD
    HAL::importEEPROM();
#endif
    if(selectFile("init.g", true)) {
        startPrint();
    }
#endif
}

void SDCard::mount() {
    sdmode = 0;
    initsd();
}

void SDCard::unmount() {
    sdmode = 0;
    sdactive = false;
    savetosd = false;
    Printer::setAutomount(false);
    Printer::setMenuMode(MENU_MODE_SD_MOUNTED + MENU_MODE_PAUSED + MENU_MODE_SD_PRINTING, false);
#if UI_DISPLAY_TYPE != NO_DISPLAY && SDSUPPORT
    uid.cwd[0] = '/';
    uid.cwd[1] = 0;
    uid.folderLevel = 0;
#endif
	Com::printFLN(PSTR("SD Card unmounted"));
}

void SDCard::startPrint() {
    if(!sdactive) return;
    sdmode = 1;
    Printer::setMenuMode(MENU_MODE_SD_PRINTING, true);
    Printer::setMenuMode(MENU_MODE_PAUSED, false);
    Printer::setPrinting(true);
    Printer::maxLayer = 0;
    Printer::currentLayer = 0;
    UI_STATUS_F(PSTR(""));
#if NEW_COMMUNICATION
    GCodeSource::registerSource(&sdSource);
#endif
}

void SDCard::pausePrint(bool intern) {
    if(!sdactive) return;
    sdmode = 2; // finish running line
    Printer::setMenuMode(MENU_MODE_PAUSED, true);
#if !defined(DISABLE_PRINTMODE_ON_PAUSE) || DISABLE_PRINTMODE_ON_PAUSE==1
    Printer::setPrinting(false);
#endif
#if NEW_COMMUNICATION
    GCodeSource::removeSource(&sdSource);
#endif
    if(EVENT_SD_PAUSE_START(intern)) {
        if(intern) {
            Commands::waitUntilEndOfAllBuffers();
            //sdmode = 0; // why ?
            Printer::MemoryPosition();
            Printer::moveToReal(IGNORE_COORDINATE, IGNORE_COORDINATE, IGNORE_COORDINATE,
                                Printer::memoryE - RETRACT_ON_PAUSE,
                                Printer::maxFeedrate[E_AXIS] / 2);
            Printer::moveToParkPosition();
            Printer::lastCmdPos[X_AXIS] = Printer::currentPosition[X_AXIS];
            Printer::lastCmdPos[Y_AXIS] = Printer::currentPosition[Y_AXIS];
            Printer::lastCmdPos[Z_AXIS] = Printer::currentPosition[Z_AXIS];
            GCode::executeFString(PSTR(PAUSE_START_COMMANDS));
        }
    }
    EVENT_SD_PAUSE_END(intern);
}

void SDCard::continuePrint(bool intern) {
    if(!sd.sdactive) return;
    if(EVENT_SD_CONTINUE_START(intern)) {
        if(intern) {
            GCode::executeFString(PSTR(PAUSE_END_COMMANDS));
            Printer::GoToMemoryPosition(true, true, false, false, Printer::maxFeedrate[X_AXIS]);
            Printer::GoToMemoryPosition(false, false, true, false, Printer::maxFeedrate[Z_AXIS] / 2.0f);
            Printer::GoToMemoryPosition(false, false, false, true, Printer::maxFeedrate[E_AXIS] / 2.0f);
        }
    }
    EVENT_SD_CONTINUE_END(intern);
#if NEW_COMMUNICATION
    GCodeSource::registerSource(&sdSource);
#endif
    Printer::setPrinting(true);
    Printer::setMenuMode(MENU_MODE_PAUSED, false);
    sdmode = 1;
}

void SDCard::stopPrint() {
    if(!sd.sdactive) return;
    if(sdmode)
        Com::printFLN(PSTR("SD print stopped by user."));
    sdmode = 0;
    Printer::setMenuMode(MENU_MODE_SD_PRINTING, false);
    Printer::setMenuMode(MENU_MODE_PAUSED, false);
    Printer::setPrinting(0);
#if NEW_COMMUNICATION
    GCodeSource::removeSource(&sdSource);
#endif
    if(EVENT_SD_STOP_START) {
        GCode::executeFString(PSTR(SD_RUN_ON_STOP));
        if(SD_STOP_HEATER_AND_MOTORS_ON_STOP) {
            Commands::waitUntilEndOfAllMoves();
            Printer::kill(false);
        }
    }
    EVENT_SD_STOP_END;
}

void SDCard::writeCommand(GCode *code) {
    unsigned int sum1 = 0, sum2 = 0; // for fletcher-16 checksum
    uint8_t buf[100];
    uint8_t p = 2;
    file.clearWriteError();
    uint16_t params = 128 | (code->params & ~1);
    memcopy2(buf, &params);
    //*(int*)buf = params;
    if(code->isV2()) { // Read G,M as 16 bit value
        memcopy2(&buf[p], &code->params2);
        //*(int*)&buf[p] = code->params2;
        p += 2;
        if(code->hasString())
            buf[p++] = strlen(code->text);
        if(code->hasM()) {
            memcopy2(&buf[p], &code->M);
            //*(int*)&buf[p] = code->M;
            p += 2;
        }
        if(code->hasG()) {
            memcopy2(&buf[p], &code->G);
            //*(int*)&buf[p]= code->G;
            p += 2;
        }
    } else {
        if(code->hasM()) {
            buf[p++] = (uint8_t)code->M;
        }
        if(code->hasG()) {
            buf[p++] = (uint8_t)code->G;
        }
    }
    if(code->hasX()) {
        memcopy4(&buf[p], &code->X);
        //*(float*)&buf[p] = code->X;
        p += 4;
    }
    if(code->hasY()) {
        memcopy4(&buf[p], &code->Y);
        //*(float*)&buf[p] = code->Y;
        p += 4;
    }
    if(code->hasZ()) {
        memcopy4(&buf[p], &code->Z);
        //*(float*)&buf[p] = code->Z;
        p += 4;
    }
    if(code->hasE()) {
        memcopy4(&buf[p], &code->E);
        //*(float*)&buf[p] = code->E;
        p += 4;
    }
    if(code->hasF()) {
        memcopy4(&buf[p], &code->F);
        //*(float*)&buf[p] = code->F;
        p += 4;
    }
    if(code->hasT()) {
        buf[p++] = code->T;
    }
    if(code->hasS()) {
        memcopy4(&buf[p], &code->S);
        //*(int32_t*)&buf[p] = code->S;
        p += 4;
    }
    if(code->hasP()) {
        memcopy4(&buf[p], &code->P);
        //*(int32_t*)&buf[p] = code->P;
        p += 4;
    }
    if(code->hasI()) {
        memcopy4(&buf[p], &code->I);
        //*(float*)&buf[p] = code->I;
        p += 4;
    }
    if(code->hasJ()) {
        memcopy4(&buf[p], &code->J);
        //*(float*)&buf[p] = code->J;
        p += 4;
    }
    if(code->hasR()) {
        memcopy4(&buf[p], &code->R);
        //*(float*)&buf[p] = code->R;
        p += 4;
    }
    if(code->hasD()) {
        memcopy4(&buf[p], &code->D);
        //*(float*)&buf[p] = code->D;
        p += 4;
    }
    if(code->hasC()) {
        memcopy4(&buf[p], &code->C);
        //*(float*)&buf[p] = code->C;
        p += 4;
    }
    if(code->hasH()) {
        memcopy4(&buf[p], &code->H);
        //*(float*)&buf[p] = code->H;
        p += 4;
    }
    if(code->hasA()) {
        memcopy4(&buf[p], &code->A);
        //*(float*)&buf[p] = code->A;
        p += 4;
    }
    if(code->hasB()) {
        memcopy4(&buf[p], &code->B);
        //*(float*)&buf[p] = code->B;
        p += 4;
    }
    if(code->hasK()) {
        memcopy4(&buf[p], &code->K);
        //*(float*)&buf[p] = code->K;
        p += 4;
    }
    if(code->hasL()) {
        memcopy4(&buf[p], &code->L);
        //*(float*)&buf[p] = code->L;
        p += 4;
    }
    if(code->hasO()) {
        memcopy4(&buf[p], &code->O);
        //*(float*)&buf[p] = code->O;
        p += 4;
    }
    if(code->hasString()) { // read 16 uint8_t into string
        char *sp = code->text;
        if(code->isV2()) {
            uint8_t i = strlen(code->text);
            for(; i; i--) buf[p++] = *sp++;
        } else {
            for(uint8_t i = 0; i < 16; ++i) buf[p++] = *sp++;
        }
    }
    uint8_t *ptr = buf;
    uint8_t len = p;
    while (len) {
        uint8_t tlen = len > 21 ? 21 : len;
        len -= tlen;
        do {
            sum1 += *ptr++;
            if(sum1 >= 255) sum1 -= 255;
            sum2 += sum1;
            if(sum2 >= 255) sum2 -= 255;
        } while (--tlen);
    }
    buf[p++] = sum1;
    buf[p++] = sum2;
    // Debug
    /*Com::printF(PSTR("Buf: "));
    for(int i=0;i<p;i++)
    Com::printF(PSTR(" "),(int)buf[i]);
    Com::println();*/
    if(params == 128) {
        Com::printErrorFLN(Com::tAPIDFinished);
    } else
        file.write(buf, p);
    if (file.getWriteError()) {
        Com::printFLN(Com::tErrorWritingToFile);
    }
}

char *SDCard::createFilename(char *buffer, const dir_t &p) {
    char *pos = buffer, *src = (char*)p.name;
    for (uint8_t i = 0; i < 11; i++, src++) {
        if (*src == ' ') continue;
        if (i == 8)
            *pos++ = '.';
        *pos++ = *src;
    }
    *pos = 0;
    return pos;
}

bool SDCard::showFilename(const uint8_t *name) {
    if (*name == DIR_NAME_DELETED || *name == '.') return false;
    return true;
}

int8_t RFstricmp(const char* s1, const char* s2) {
    while(*s1 && (tolower(*s1) == tolower(*s2)))
        s1++, s2++;
    return (const uint8_t)tolower(*s1) - (const uint8_t)tolower(*s2);
}

int8_t RFstrnicmp(const char* s1, const char* s2, size_t n) {
    while(n--) {
        if(tolower(*s1) != tolower(*s2))
            return (uint8_t)tolower(*s1) - (uint8_t)tolower(*s2);
        s1++;
        s2++;
    }
    return 0;
}

void SDCard::ls() {
    SdBaseFile file;

    Com::printFLN(Com::tBeginFileList);
    fat.chdir();

    file.openRoot(fat.vol());
    file.ls(0, 0);
    Com::printFLN(Com::tEndFileList);
}

#if JSON_OUTPUT
void SDCard::lsJSON(const char *filename) {
    SdBaseFile dir;
    fat.chdir();
    if (*filename == 0) {
        dir.openRoot(fat.vol());
    } else {
        if (!dir.open(fat.vwd(), filename, O_READ) || !dir.isDir()) {
            Com::printF(Com::tJSONErrorStart);
            Com::printF(Com::tFileOpenFailed);
            Com::printFLN(Com::tJSONErrorEnd);
            return;
        }
    }

    Com::printF(Com::tJSONDir);
    SDCard::printEscapeChars(filename);
    Com::printF(Com::tJSONFiles);
    dir.lsJSON();
    Com::printFLN(Com::tJSONArrayEnd);
}

void SDCard::printEscapeChars(const char *s) {
    for (unsigned int i = 0; i < strlen(s); ++i) {
        switch (s[i]) {
        case '"':
        case '/':
        case '\b':
        case '\f':
        case '\n':
        case '\r':
        case '\t':
        case '\\':
            Com::print('\\');
            break;
        }
        Com::print(s[i]);
    }
}

void SDCard::JSONFileInfo(const char* filename) {
    SdFile targetFile;
    GCodeFileInfo *info, tmpInfo;
    if (strlen(filename) == 0)  {
        targetFile = file;
        info = &fileInfo;
    } else {
        if (!targetFile.open(fat.vwd(), filename, O_READ) || targetFile.isDir()) {
            Com::printF(Com::tJSONErrorStart);
            Com::printF(Com::tFileOpenFailed);
            Com::printFLN(Com::tJSONErrorEnd);
            return;
        }
        info = &tmpInfo;
        info->init(targetFile);
    }
    if (!targetFile.isOpen()) {
        Com::printF(Com::tJSONErrorStart);
        Com::printF(Com::tNotSDPrinting);
        Com::printFLN(Com::tJSONErrorEnd);
        return;
    }

    // {"err":0,"size":457574,"height":4.00,"layerHeight":0.25,"filament":[6556.3],"generatedBy":"Slic3r 1.1.7 on 2014-11-09 at 17:11:32"}
    Com::printF(Com::tJSONFileInfoStart);
    Com::print(info->fileSize);
    Com::printF(Com::tJSONFileInfoHeight);
    Com::print(info->objectHeight);
    Com::printF(Com::tJSONFileInfoLayerHeight);
    Com::print(info->layerHeight);
    Com::printF(Com::tJSONFileInfoFilament);
    Com::print(info->filamentNeeded);
    Com::printF(Com::tJSONFileInfoGeneratedBy);
    Com::print(info->generatedBy);
    Com::print('"');
    if (strlen(filename) == 0) {
        Com::printF(Com::tJSONFileInfoName);
        file.printName();
        Com::print('"');
    }
    Com::print('}');
    Com::println();
};

#endif

bool SDCard::selectFile(const char* filename, bool silent) {
    const char* oldP = filename;

    if (!sdactive)
        return false;
    sdmode = 0;

    file.close();
    // Filename for progress view
    strncpy(Printer::printName, filename, 20);
    Printer::printName[20] = 0;
    if (file.open(fat.vwd(), filename, O_READ)) {
        if ((oldP = strrchr(filename, '/')) != NULL)
            oldP++;
        else
            oldP = filename;

        if (!silent) {
            Com::printF(Com::tFileOpened, oldP);
            Com::printFLN(Com::tSpaceSizeColon, file.fileSize());
        }
#if JSON_OUTPUT
        fileInfo.init(file);
#endif
        sdpos = 0;
        filesize = file.fileSize();
        Com::printFLN(Com::tFileSelected);
        return true;
    } else {
        if (!silent)
            Com::printFLN(Com::tFileOpenFailed);
        return false;
    }
}

void SDCard::printStatus() {
    if(sdactive) {
        Com::printF(Com::tSDPrintingByte, sdpos);
        Com::printFLN(Com::tSlash, filesize);
    } else {
        Com::printFLN(Com::tNotSDPrinting);
    }
}

void SDCard::startWrite(char *filename) {
    if(!sdactive) return;
    file.close();
    sdmode = 0;
    fat.chdir();
    if(!file.open(filename, O_CREAT | O_APPEND | O_WRITE | O_TRUNC)) {
        Com::printFLN(Com::tOpenFailedFile, filename);
    } else {
        UI_STATUS_F(Com::translatedF(UI_TEXT_UPLOADING_ID));
        savetosd = true;
        Com::printFLN(Com::tWritingToFile, filename);
    }
}

void SDCard::finishWrite() {
    if(!savetosd) return; // already closed or never opened
    file.sync();
    file.close();
    savetosd = false;
    Com::printFLN(Com::tDoneSavingFile);
    UI_CLEAR_STATUS;
}

void SDCard::deleteFile(char *filename) {
    if(!sdactive) return;
    sdmode = 0;
    file.close();
    if(fat.remove(filename)) {
        Com::printFLN(Com::tFileDeleted);
    } else {
        if(fat.rmdir(filename))
            Com::printFLN(Com::tFileDeleted);
        else
            Com::printFLN(Com::tDeletionFailed);
    }
}

void SDCard::makeDirectory(char *filename) {
    if(!sdactive) return;
    sdmode = 0;
    file.close();
    if(fat.mkdir(filename)) {
        Com::printFLN(Com::tDirectoryCreated);
    } else {
        Com::printFLN(Com::tCreationFailed);
    }
}

#ifdef GLENN_DEBUG
void SDCard::writeToFile() {
    size_t nbyte;
    char szName[10];

    strcpy(szName, "Testing\r\n");
    nbyte = file.write(szName, strlen(szName));
    Com::print("L=");
    Com::print((long)nbyte);
    Com::println();
}

#endif

#endif

#if JSON_OUTPUT

// --------------------------------------------------------------- //
// Code that gets gcode information is adapted from RepRapFirmware //
// Originally licensed under GPL                                   //
// Authors: reprappro, dc42, dcnewman, others                      //
// Source: https://github.com/dcnewman/RepRapFirmware              //
// Copy date: 15 Nov 2015                                          //
// --------------------------------------------------------------- //

void GCodeFileInfo::init(SdFile &file) {
    this->fileSize = file.fileSize();
    this->filamentNeeded = 0.0;
    this->objectHeight = 0.0;
    this->layerHeight = 0.0;
    if (!file.isOpen()) return;
    bool genByFound = false, layerHeightFound = false, filamentNeedFound = false;
#if CPU_ARCH==ARCH_AVR
#define GCI_BUF_SIZE 120
#else
#define GCI_BUF_SIZE 1024
#endif
    // READ 4KB FROM THE BEGINNING
    char buf[GCI_BUF_SIZE];
    for (int i = 0; i < 4096; i += GCI_BUF_SIZE - 50) {
        if(!file.seekSet(i)) break;
        file.read(buf, GCI_BUF_SIZE);
        if (!genByFound && findGeneratedBy(buf, this->generatedBy)) genByFound = true;
        if (!layerHeightFound && findLayerHeight(buf, this->layerHeight)) layerHeightFound = true;
        if (!filamentNeedFound && findFilamentNeed(buf, this->filamentNeeded)) filamentNeedFound = true;
        if(genByFound && layerHeightFound && filamentNeedFound) goto get_objectHeight;
    }

    // READ 4KB FROM END
    for (int i = 0; i < 4096; i += GCI_BUF_SIZE - 50) {
        if(!file.seekEnd(-4096 + i)) break;
        file.read(buf, GCI_BUF_SIZE);
        if (!genByFound && findGeneratedBy(buf, this->generatedBy)) genByFound = true;
        if (!layerHeightFound && findLayerHeight(buf, this->layerHeight)) layerHeightFound = true;
        if (!filamentNeedFound && findFilamentNeed(buf, this->filamentNeeded)) filamentNeedFound = true;
        if(genByFound && layerHeightFound && filamentNeedFound) goto get_objectHeight;
    }

get_objectHeight:
    // MOVE FROM END UP IN 1KB BLOCKS UP TO 30KB
    for (int i = GCI_BUF_SIZE; i < 30000; i += GCI_BUF_SIZE - 50) {
        if(!file.seekEnd(-i)) break;
        file.read(buf, GCI_BUF_SIZE);
        if (findTotalHeight(buf, this->objectHeight)) break;
    }
    file.seekSet(0);
}

bool GCodeFileInfo::findGeneratedBy(char *buf, char *genBy) {
    // Slic3r & S3D
    const char* generatedByString = PSTR("generated by ");
    char* pos = strstr_P(buf, generatedByString);
    if (pos) {
        pos += strlen_P(generatedByString);
        size_t i = 0;
        while (i < GENBY_SIZE - 1 && *pos >= ' ') {
            char c = *pos++;
            if (c == '"' || c == '\\') {
                // Need to escape the quote-mark for JSON
                if (i > GENBY_SIZE - 3) break;
                genBy[i++] = '\\';
            }
            genBy[i++] = c;
        }
        genBy[i] = 0;
        return true;
    }

    // CURA
    const char* slicedAtString = PSTR(";Sliced at: ");
    pos = strstr_P(buf, slicedAtString);
    if (pos) {
        strcpy_P(genBy, PSTR("Cura"));
        return true;
    }

    // UNKNOWN
    strcpy_P(genBy, PSTR("Unknown"));
    return false;
}

bool GCodeFileInfo::findLayerHeight(char *buf, float &layerHeight) {
    // SLIC3R
    layerHeight = 0;
    const char* layerHeightSlic3r = PSTR("; layer_height ");
    char *pos = strstr_P(buf, layerHeightSlic3r);
    if (pos) {
        pos += strlen_P(layerHeightSlic3r);
        while (*pos == ' ' || *pos == 't' || *pos == '=' || *pos == ':') {
            ++pos;
        }
        layerHeight = strtod(pos, NULL);
        return true;
    }

    // CURA
    const char* layerHeightCura = PSTR("Layer height: ");
    pos = strstr_P(buf, layerHeightCura);
    if (pos) {
        pos += strlen_P(layerHeightCura);
        while (*pos == ' ' || *pos == 't' || *pos == '=' || *pos == ':') {
            ++pos;
        }
        layerHeight = strtod(pos, NULL);
        return true;
    }

    return false;
}

bool GCodeFileInfo::findFilamentNeed(char *buf, float &filament) {
    const char* filamentUsedStr = PSTR("filament used");
    const char* pos = strstr_P(buf, filamentUsedStr);
    filament = 0;
    if (pos != NULL) {
        pos += strlen_P(filamentUsedStr);
        while (*pos == ' ' || *pos == 't' || *pos == '=' || *pos == ':') {
            ++pos;    // this allows for " = " from default slic3r comment and ": " from default Cura comment
        }
        if (isDigit(*pos)) {
            char *q;
            filament += strtod(pos, &q);
            if (*q == 'm' && *(q + 1) != 'm') {
                filament *= 1000.0;        // Cura outputs filament used in metres not mm
            }
        }
        return true;
    }
    return false;
}

bool GCodeFileInfo::findTotalHeight(char *buf, float &height) {
    int len = 1024;
    bool inComment, inRelativeMode = false;
    unsigned int zPos;
    for (int i = len - 5; i > 0; i--) {
        if (inRelativeMode) {
            inRelativeMode = !(buf[i] == 'G' && buf[i + 1] == '9' && buf[i + 2] == '1' && buf[i + 3] <= ' ');
        } else if (buf[i] == 'G') {
            // Ignore G0/G1 codes if absolute mode was switched back using G90 (typical for Cura files)
            if (buf[i + 1] == '9' && buf[i + 2] == '0' && buf[i + 3] <= ' ') {
                inRelativeMode = true;
            } else if ((buf[i + 1] == '0' || buf[i + 1] == '1') && buf[i + 2] == ' ') {
                // Look for last "G0/G1 ... Z#HEIGHT#" command as generated by common slicers
                // Looks like we found a controlled move, however it could be in a comment, especially when using slic3r 1.1.1
                inComment = false;
                size_t j = i;
                while (j != 0) {
                    --j;
                    char c = buf[j];
                    if (c == '\n' || c == '\r') break;
                    if (c == ';') {
                        // It is in a comment, so give up on this one
                        inComment = true;
                        break;
                    }
                }
                if (inComment) continue;

                // Find 'Z' position and grab that value
                zPos = 0;
                for (int j = i + 3; j < len - 2; j++) {
                    char c = buf[j];
                    if (c < ' ') {
                        // Skip all white spaces...
                        while (j < len - 2 && c <= ' ') {
                            c = buf[++j];
                        }
                        // ...to make sure ";End" doesn't follow G0 .. Z#HEIGHT#
                        if (zPos != 0) {
                            //debugPrintf("Found at offset %u text: %.100s\n", zPos, &buf[zPos + 1]);
                            height = strtod(&buf[zPos + 1], NULL);
                            return true;
                        }
                        break;
                    } else if (c == ';') break;
                    else if (c == 'Z') zPos = j;
                }
            }
        }
    }
    return false;
}
#endif // JSON_OUTPUT