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/* KanjiPad - Japanese handwriting recognition front end
* Copyright (C) 1997 Owen Taylor
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <netinet/in.h> /* for ntohl */
#include "jstroke.h"
#define MAX_STROKES 32
#define BUFLEN 1024
static char *stroke_dicts[MAX_STROKES];
void
load_database(char *fname)
{
int fd;
int i;
fd = open(fname, 0, O_RDONLY);
if (fd < 0)
{
fprintf(stderr,"Can't open %s\n", fname);
exit(1);
}
for (i=0;i<MAX_STROKES;i++)
stroke_dicts[i] = NULL;
while (1)
{
int bytes_read;
unsigned int nstrokes;
unsigned int len;
int buf[2];
bytes_read = read(fd,&buf,2*sizeof(int));
nstrokes = ntohl(buf[0]);
len = ntohl(buf[1]);
if ((bytes_read != 2*sizeof(int)) || (nstrokes > MAX_STROKES))
{
fprintf(stderr, "Corrupt stroke database");
exit(1);
}
if (nstrokes == 0)
break;
stroke_dicts[nstrokes] = malloc(len);
bytes_read = read(fd, stroke_dicts[nstrokes], len);
if (bytes_read != len)
{
fprintf(stderr, "Corrupt stroke database");
exit(1);
}
}
close(fd);
}
/* From Ken Lunde's _Understanding Japanese Information Processing_
O'Reilly, 1993 */
int
process_strokes (FILE *file)
{
RawStroke strokes[MAX_STROKES];
char *buffer = malloc(BUFLEN);
int buflen = BUFLEN;
int nstrokes = 0;
/* Read in strokes from standard in, all points for each stroke
* strung together on one line, until we get a blank line
*/
while (1)
{
char *p,*q;
int len;
if (!fgets(buffer, buflen, file))
return 0;
while ((strlen(buffer) == buflen - 1) && (buffer[buflen-2] != '\n'))
{
buflen += BUFLEN;
buffer = realloc(buffer, buflen);
if (!fgets(buffer+buflen-BUFLEN-1, BUFLEN+1, file))
return 0;
}
len = 0;
p = buffer;
while (1) {
while (isspace (*p)) p++;
if (*p == 0)
break;
strokes[nstrokes].m_x[len] = strtol (p, &q, 0);
if (p == q)
break;
p = q;
while (isspace (*p)) p++;
if (*p == 0)
break;
strokes[nstrokes].m_y[len] = strtol (p, &q, 0);
if (p == q)
break;
p = q;
len++;
}
if (len == 0)
break;
strokes[nstrokes].m_len = len;
nstrokes++;
if (nstrokes == MAX_STROKES)
break;
}
if (nstrokes != 0 && stroke_dicts[nstrokes])
{
int i;
ListMem *top_picks;
StrokeScorer *scorer = StrokeScorerCreate (stroke_dicts[nstrokes],
strokes, nstrokes);
if (scorer)
{
StrokeScorerProcess(scorer, -1);
top_picks = StrokeScorerTopPicks(scorer);
StrokeScorerDestroy(scorer);
for (i=0;i<top_picks->m_argc;i++)
{
unsigned char c[2];
c[0] = top_picks->m_argv[i][0];
c[1] = top_picks->m_argv[i][1];
printf("%c%c",c[0],c[1]);
}
free(top_picks);
}
printf("\n");
fflush(stdout);
}
return 1;
}
int
main(int argc, char **argv)
{
load_database(argv[1]);
while (process_strokes (stdin))
;
return 0;
}
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