SLine Struct Reference

#include <gcode_thumb_decoder.h>

Collaboration diagram for SLine:

Public Member Functions
	SLine ()
void	AppendByte (uint8_t b)
void	Reset ()
	operator const char * () const
bool	IsBeginThumbnail () const
bool	IsEndThumbnail () const

Public Attributes
uint8_t	size
size_t	expectedLineSize
uint8_t	l [MAX+1]

Static Public Attributes
static const size_t	MAX = 80

Constructor & Destructor Documentation

SLine()

SLine::SLine

(

)

            {
        Reset();
    }

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Member Function Documentation

AppendByte()

void SLine::AppendByte

(

uint8_t

b

)

                               {
        if (size < MAX) {
            l[size++] = b;
            l[size] = 0; // prepare termination
        }
        ++expectedLineSize;
    }

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Reset()

void SLine::Reset

(

)

                        {
        size = 0;
        expectedLineSize = 0;
        l[0] = l[MAX] = 0;
    }

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operator const char *()

SLine::operator const char *

(

)

const

                                  {
        return (const char *)(l);
    }

IsBeginThumbnail()

bool SLine::IsBeginThumbnail

(

)

const

                                   {
    static const char thumbnailBegin[] = "; thumbnail begin "; // pozor na tu mezeru na konci
    // pokud zacina radka na ; thumbnail, lze se tim zacit zabyvat
    // nemuzu pouzivat zadne pokrocile algoritmy, musim vystacit se strcmp
    const char *lc = (const char *)l; // jen quli debuggeru, abych do toho videl...
    // ta -1 na size ma svuj vyznam - chci, aby strncmp NEporovnavalo ten null
    // znak na konci, cili abych se nemusel srat s tim, ze vstupni string je
    // delsi, cili aby to emulovalo chovani boost::starts_with()
    if (!strncmp(lc, thumbnailBegin,
            std::min(sizeof(l), sizeof(thumbnailBegin)) - 1)) {
        // zacatek thumbnailu
        unsigned int x, y;
        unsigned long bytes;
        lc = lc + sizeof(thumbnailBegin) - 1;
        int ss = sscanf(lc, "%ux%u %lu", &x, &y, &bytes);
        if (ss == 3) { // 3 uspesne prectene itemy - rozliseni
            // je to platny zacatek thumbnailu, je to ten muj?
            if (x == 220 && y == 124) {
                // je to ten muj, ktery chci
                return true;
            }
        }
    }
    return false;
}

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IsEndThumbnail()

bool SLine::IsEndThumbnail

(

)

const

                                 {
    static const char thumbnailEnd[] = "; thumbnail end";
    // proc -1 viz. vysvetleni v LineIsBeginThumbnail
    return !strncmp((const char *)l, thumbnailEnd,
        std::min(sizeof(l), sizeof(thumbnailEnd)) - 1);
}

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Member Data Documentation

MAX

const size_t SLine::MAX = 80

static

size

uint8_t SLine::size

expectedLineSize

size_t SLine::expectedLineSize

l

uint8_t SLine::l[MAX+1]