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/* parse_mon - parse monitorcap entry */
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include "monitors.h"
#include "raster.h"
#include "glocale.h"
static FILE *monitors = NULL;
static struct MON_CAP cap;
static int build_path(char *,char *);
static char *substr(char *,char *);
static int read_line(FILE *,char *,int);
struct MON_CAP *R_parse_monitorcap(int field, char *key)
{
int rewound;
char line[1024];
char *p;
char file[500];
char *gisbase;
gisbase = getenv ("GISBASE");
if (gisbase == NULL)
{
fprintf (stderr, _("ERROR: GISBASE not set\n"));
sleep(2);
exit(1);
}
rewound = 0;
if (!(field == MON_NEXT || field == MON_NAME ||
field == MON_PATH || field == MON_LINK || field == MON_CLOSE))
return(NULL);
if (monitors == NULL)
{
sprintf (file, "%s/etc/monitorcap", gisbase) ;
if ((monitors = fopen(file,"r")) == NULL)
{
perror (file);
sleep(2);
exit(1);
}
}
else
{
if (field == MON_CLOSE)
{
fclose(monitors);
monitors = NULL;
return(NULL);
}
}
while (-1)
{
if (read_line(monitors,line,sizeof line))
{
if (field == MON_NEXT)
return(NULL);
rewind(monitors);
if (read_line(monitors,line,sizeof line) || rewound)
return(NULL);
rewound = -1;
}
build_path (line, gisbase);
cap.path = cap.comment = cap.link = cap.tty = cap.where = NULL;
if ((cap.name = malloc(strlen(line)+1)) == NULL)
return(NULL);
strcpy(cap.name,line);
if ((p = substr(":",cap.name)) != NULL)
{
*p++ = '\0';
cap.path = p;
if ((p = substr(":",p)) != NULL)
{
*p++ = '\0';
cap.comment = p;
if ((p = substr(":",p)) != NULL)
{
*p++ = '\0';
cap.link = p;
if ((p = substr(":",p)) != NULL)
{
*p++ = '\0';
cap.tty = p;
if ((p = substr(":",p)) != NULL)
{
*p++ = 0;
cap.where = p;
if ((p = substr("\n",p)) != NULL)
*p = '\0';
}
}
}
}
}
if( cap.path==NULL || cap.link==NULL || cap.where==NULL|| cap.tty == NULL || cap.comment==NULL)
free(cap.name);
else
{
if (field == MON_NEXT || (field == MON_NAME && !strcmp(key,cap.name))
|| (field == MON_PATH && !strcmp(key, cap.path))
|| (field == MON_LINK && !strcmp(key,cap.link)))
return(&cap);
else
free(cap.name);
}
}
}
/* read_line - read a line, possibly continued with a "\" into a buffer */
static int read_line(
FILE *file, /* file from which to read */
char *line, /* buffer in which to put it */
int size) /* size of buffer */
{
int length, full_line, eof, done;
char c, last_c;
*line ='\0';
for (length = full_line = eof = 0; !full_line && !eof; )
{ /* one entire line at a time */
while(1)
{
eof = (fgets(line + length,size - length - 1,file) == NULL);
if (eof)
break ;
if (*(line+length) != '#')
break ;
}
length = strlen(line) - 1;
if (*(line + length) == '\n')
{
if (*(line + length - 1) == '\\')
--length;
else
full_line = -1;
}
else
{
if (length != -1)
{
fprintf(stderr,"error: input line too long\n");
full_line = -1;
last_c = c = ' ';
for (done = 0; !done; )
{
if((c = getc(file)) != EOF)
{
if (c == '\n' && last_c != '\\')
done = -1;
else
last_c = c;
}
else
eof = done = -1;
}
}
}
}
return(eof);
}
/* substr - find substring in a string. returns pointer to start of */
/* substring or NULL if not found */
static char *substr(char *string,char *buffer)
{
int start, i, found;
char c;
start = i = found = 0;
while ((c = *(buffer + start + i)) != '\0' && !found)
{
if (c == *(string + i))
{
if (*(string + ++i) == '\0')
found = -1;
}
else
{
start++;
i = 0;
}
}
if (found)
return(buffer + start);
else
return(NULL);
}
static int build_path(char *line,char *gisbase)
{
char temp[1024];
char *t, *l;
/* second field is monitor program
* if it doesn't start with / then prepend gisbase
*/
t = substr (":", line);
if (t == NULL)
{
return 1;
}
if (t[1] == '/')
{
return 1; /* aready a full path name */
}
/* copy up to first : */
t = temp;
l = line;
while (*l != ':')
*t++ = *l++;
*t++ = *l++;
/* prepend gisbase */
while (*gisbase)
*t++ = *gisbase++;
*t++ = '/' ;
/* copy rest of line */
while (*t++ = *l++);
/* now put it all back into the original line */
strcpy (line, temp);
return 0;
}
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