format-emd.c

static char emdDecode(unsigned char inputByte)
{
    return (inputByte >= 0x80) ? ((-~inputByte) - 1) : inputByte; /* TODO: eliminate ternary return statement */
}

/*! Reads a file with the given \a fileName and loads the data into \a pattern.
 *  Returns \c true if successful, otherwise returns \c false. */
static int readEmd(EmbPattern* pattern, EmbFile* file, const char* fileName)
{
    unsigned char b0 = 0, b1 = 0;
    char dx = 0, dy = 0;
    int flags = NORMAL;
    char endOfStream = 0;
    unsigned char jemd0[6]; /* TODO: more descriptive name */
    int width, height, colors;
    int i;

    embPattern_loadExternalColorFile(pattern, fileName);

    binaryReadBytes(file, jemd0, 6); /* TODO: check return value */
    width = binaryReadInt16(file);
    height = binaryReadInt16(file);
    colors = binaryReadInt16(file);

    embFile_seek(file, 0x30, SEEK_SET);

    for (i = 0; !endOfStream; i++) {
        flags = NORMAL;
        b0 = binaryReadUInt8(file);
        b1 = binaryReadUInt8(file);

        if (b0 == 0x80) {
            if (b1 == 0x2A) {
                embPattern_addStitchRel(pattern, 0, 0, STOP, 1);
                continue;
            } else if (b1 == 0x80) {
                b0 = binaryReadUInt8(file);
                b1 = binaryReadUInt8(file);
                flags = TRIM;
            } else if (b1 == 0xFD) {
                embPattern_addStitchRel(pattern, 0, 0, END, 1);
                break;
            } else {
                continue;
            }
        }
        dx = emdDecode(b0);
        dy = emdDecode(b1);
        embPattern_addStitchRel(pattern, dx / 10.0, dy / 10.0, flags, 1);
    }
    embPattern_end(pattern);

    return 1;
}

/*! Writes the data from \a pattern to a file with the given \a fileName.
 *  Returns \c true if successful, otherwise returns \c false. */
static int writeEmd(EmbPattern* pattern, EmbFile* file, const char* fileName)
{
    return 0; /*TODO: finish writeEmd */
}