gcode_file.cpp File Reference

#include "gcode_file.h"
#include "dbg.h"
#include "gcode_thumb_decoder.h"

Macros
#define	DBG   _dbg0

Functions
static int	read (struct _reent *_r, void *pv, char *pc, int n)
static int	write (struct _reent *_r, void *pv, const char *pc, int n)
static int	close (struct _reent *_r, void *pv)
static _fpos_t	seek (struct _reent *_r, void *pv, _fpos_t fpos, int ipos)
int	f_gcode_thumb_open (FILE *fp, FIL *gcode_fp)
int	f_gcode_thumb_close (FILE *fp)
static bool	read_line (FIL *fp, SLine &line)
static char *	str_trim (char *str)
bool	f_gcode_get_next_comment_assignment (FIL *fp, char *name_buffer, int name_buffer_len, char *value_buffer, int value_buffer_len)

Variables
static FIL *	gcode_thumb_fp = nullptr

Macro Definition Documentation

DBG

#define DBG   _dbg0

Function Documentation

read()

static int read ( struct _reent *  _r, void *  pv, char *  pc, int  n  )

static

                                                              {
    int count = GCodeThumbDecoder::Instance().Read(gcode_thumb_fp, pc, n);
    if (count < 0) {
        return 0;
    }
    return count;
}

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write()

static int write ( struct _reent *  _r, void *  pv, const char *  pc, int  n  )

static

                                                                     {
    return 0;
}

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close()

static int close ( struct _reent *  _r, void *  pv  )

static

                                              {
    return 0;
}

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seek()

static _fpos_t seek ( struct _reent *  _r, void *  pv, _fpos_t  fpos, int  ipos  )

static

                                                                         {
    return 0;
}

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f_gcode_thumb_open()

int f_gcode_thumb_open	(	FILE *	fp,
		FIL *	gcode_fp
	)

                                                           {
    if (gcode_thumb_fp) {
        DBG("a gcode png file is already open");
        return 1;
    }
    gcode_thumb_fp = gcode_fp;
 
    GCodeThumbDecoder::Instance().Reset();
 
    memset(fp, 0, sizeof(FILE));
    fp->_read = read;
    fp->_write = write;
    fp->_close = close;
    fp->_seek = seek;
    fp->_file = -1;
    fp->_flags = __SRD;
    fp->_lbfsize = 512;
    fp->_bf._base = (uint8_t *)malloc(fp->_lbfsize);
    fp->_bf._size = fp->_lbfsize;
 
    return 0;
}

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f_gcode_thumb_close()

int f_gcode_thumb_close

(

FILE *

fp

)

                                             {
    if (fp && fp->_bf._base) {
        free(fp->_bf._base);
    }
    gcode_thumb_fp = nullptr;
    return 0;
}

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read_line()

static bool read_line ( FIL *  fp, SLine &  line  )

static

                                            {
    uint8_t byte;
    UINT bytes_read;
    line.Reset();
    for (;;) {
        if (f_eof(fp))
            return line.size > 0;
        if (f_read(fp, &byte, 1, &bytes_read) != FR_OK || bytes_read != 1)
            return false;
        if (byte == '\n')
            break;
        line.AppendByte(byte);
    }
    return true;
}

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str_trim()

static char* str_trim ( char *  str )

static

                                 {
 
    // trim leading space
    while (*str == ' ')
        str++;
 
    if (*str == 0)
        return str;
 
    // trim trailing space
    char *end = str + strlen(str) - 1;
    while (end > str && *end == ' ')
        end--;
    end[1] = '\0';
 
    return str;
}

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f_gcode_get_next_comment_assignment()

bool f_gcode_get_next_comment_assignment	(	FIL *	fp,
		char *	name_buffer,
		int	name_buffer_len,
		char *	value_buffer,
		int	value_buffer_len
	)

Parse comment line in given file

Reads from the file current line and parses it. Example: Read line: ; infill extrusion width = 0.40mm\n Ouptut: name = "infill extrusion width", value = "0.40mm"

                          {
    SLine line;
    while (true) {
        if (!read_line(fp, line))
            return false;
 
        // is it a comment line?
        if (strncmp(line, ";", 1) != 0)
            continue;
 
        // find equal sign or discard this line
        int equal_sign_pos = -1;
        for (int i = 1; i < (int)strlen(line); i++) {
            if (line[i] == '=') {
                equal_sign_pos = i;
                break;
            }
        }
        if (equal_sign_pos == -1)
            continue;
 
        // trim leading spaces
        int name_start = 1;
        while (name_start < equal_sign_pos && line[name_start] == ' ')
            name_start++;
        int value_start = equal_sign_pos + 1;
        while (line[value_start] == ' ')
            value_start++;
 
        // copy name and value to given buffers
        snprintf(name_buffer, name_buffer_len, "%.*s",
            equal_sign_pos - name_start,
            (const char *)line.l + name_start);
        snprintf(value_buffer, value_buffer_len, "%s",
            (const char *)line.l + value_start);
 
        // trim trailing spaces
        str_trim(name_buffer);
        str_trim(value_buffer);
 
        return true;
    }
}

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Variable Documentation

gcode_thumb_fp

FIL* gcode_thumb_fp = nullptr

static