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/* parse_mon - parse monitorcap entry */
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <grass/gis.h>
#include <grass/glocale.h>
#include <grass/raster.h>
#include <grass/monitors.h>
static FILE *monitors = NULL;
static struct MON_CAP cap;
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 = G_gisbase();
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)
G_fatal_error("Unable to open %s", file);
}
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;
}
cap.path = cap.comment = cap.link = cap.tty = cap.where = NULL;
if ((cap.name = G_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)
G_free(cap.name);
else {
sprintf(line, "%s/%s", gisbase, cap.path);
cap.path = G_store(line);
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
G_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);
}
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