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/*
* $LynxId: LYTraversal.c,v 1.30 2010/09/24 22:57:01 tom Exp $
*/
#include <HTUtils.h>
#include <LYGlobalDefs.h>
#include <LYUtils.h>
#include <LYClean.h>
#include <LYCurses.h>
#include <LYStrings.h>
#include <LYTraversal.h>
#include <LYexit.h>
#include <LYLeaks.h>
/* routines to handle special traversal feature */
static void final_perror(const char *msg, int clean_flag)
{
int saved_errno = errno;
if (LYCursesON) {
if (clean_flag)
cleanup();
else
stop_curses();
}
set_errno(saved_errno);
perror(msg);
}
static void exit_with_perror(const char *msg)
{
final_perror(msg, TRUE);
exit_immediately(EXIT_FAILURE);
}
BOOLEAN lookup_link(char *target)
{
FILE *ifp;
char *buffer = NULL;
char *line = NULL;
int result = FALSE;
if ((ifp = fopen(TRAVERSE_FILE, TXT_R)) == NULL) {
if ((ifp = LYNewTxtFile(TRAVERSE_FILE)) == NULL) {
exit_with_perror(CANNOT_OPEN_TRAV_FILE);
} else {
LYCloseOutput(ifp);
return (FALSE);
}
}
HTSprintf0(&line, "%s\n", target);
while (LYSafeGets(&buffer, ifp) != NULL) {
if (STREQ(line, buffer)) {
result = TRUE;
break;
}
} /* end while */
FREE(line);
FREE(buffer);
LYCloseInput(ifp);
return (BOOL) (result);
}
void add_to_table(char *target)
{
FILE *ifp;
if ((ifp = LYAppendToTxtFile(TRAVERSE_FILE)) == NULL) {
exit_with_perror(CANNOT_OPEN_TRAV_FILE);
}
fprintf(ifp, "%s\n", target);
LYCloseOutput(ifp);
}
void add_to_traverse_list(char *fname, char *prev_link_name)
{
FILE *ifp;
if ((ifp = LYAppendToTxtFile(TRAVERSE_FOUND_FILE)) == NULL) {
exit_with_perror(CANNOT_OPEN_TRAF_FILE);
}
fprintf(ifp, "%s\t%s\n", fname, prev_link_name);
LYCloseOutput(ifp);
}
void dump_traversal_history(void)
{
int x;
FILE *ifp;
if (nhist <= 0)
return;
if ((ifp = LYAppendToTxtFile(TRAVERSE_FILE)) == NULL) {
final_perror(CANNOT_OPEN_TRAV_FILE, FALSE);
return;
}
fprintf(ifp, "\n\n%s\n\n\t %s\n\n",
TRAV_WAS_INTERRUPTED,
gettext("here is a list of the history stack so that you may rebuild"));
for (x = nhist - 1; x >= 0; x--) {
fprintf(ifp, "%s\t%s\n", HDOC(x).title, HDOC(x).address);
}
LYCloseOutput(ifp);
}
void add_to_reject_list(char *target)
{
FILE *ifp;
CTRACE((tfp, "add_to_reject_list(%s)\n", target));
if ((ifp = LYAppendToTxtFile(TRAVERSE_REJECT_FILE)) == NULL) {
exit_with_perror(CANNOT_OPEN_REJ_FILE);
}
fprintf(ifp, "%s\n", target);
LYCloseOutput(ifp);
}
/* there need not be a reject file, so if it doesn't open, just return
FALSE, meaning "target not in reject file" If the last character in
a line in a reject file is "*", then also reject if target matches up to
that point in the string
Blank lines are ignored
Lines that contain just a * are allowed, but since they mean "reject
everything" it shouldn't come up much!
*/
BOOLEAN lookup_reject(char *target)
{
FILE *ifp;
char *buffer = NULL;
char *line = NULL;
size_t len;
int result = FALSE;
if ((ifp = fopen(TRAVERSE_REJECT_FILE, TXT_R)) == NULL) {
return (FALSE);
}
HTSprintf0(&line, "%s", target);
while (LYSafeGets(&buffer, ifp) != NULL && !result) {
LYTrimTrailing(buffer);
len = strlen(buffer);
if (len != 0) { /* if not an empty line */
if (buffer[len - 1] == '*') {
/* if last char is * and the rest of the chars match */
if ((len == 1) || (StrNCmp(line, buffer, len - 1) == 0)) {
result = TRUE;
}
} else {
if (STREQ(line, buffer)) {
result = TRUE;
}
}
}
} /* end while loop over the file */
FREE(buffer);
FREE(line);
LYCloseInput(ifp);
CTRACE((tfp, "lookup_reject(%s) -> %d\n", target, result));
return (BOOL) (result);
}
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