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freebsd/gnu/lib/libdialog/tree.c
Eric Melville b48baf886a Handle keys consistently.
2001-07-26 03:34:43 +00:00

1136 lines
26 KiB
C
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/*
* tree.c -- implements the 'tree' interface element for libdialog
*
* Author: Anatoly A. Orehovsky (tolik@mpeks.tomsk.su)
*
* Copyright (c) 1997, Anatoly A. Orehovsky
* 09/28/98 - patched by Anatoly A. Orehovsky (smart_tree())
*
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif
#include <stdlib.h>
#include <strings.h>
#include <stdio.h>
#include <dialog.h>
#include "dialog.priv.h"
#include <ncurses.h>
/* static utils for make tree */
struct leaf {
unsigned char *name; /* name of leaf */
unsigned char *branches; /* branches that going by leaf */
unsigned char slip; /* slip of leaf*/
int shift; /* shift relative root of tree */
};
static int mk_slip(struct leaf array[], int arr_size,
int number, int shift);
/* make tree from file
*
* filename - name of file with like find(1) output
* p_names - pointer to array of strings
* p_size - pointer to size of array
* FS - fields separator
* p_array - pointer to array of leafs
*
* return values:
* 0 - ok and names by p_names, size by p_size, array by p_array set
* -1 - memory allocation error (errno set)
*/
static int mk_ftree(char *filename,
unsigned char ***p_names, int *p_size, unsigned char FS,
struct leaf **p_array);
/* make tree from array
*
* names - array of strings
* size - size of array
* FS - fields separator
* p_array - pointer to array of leafs
*
* return values:
* 0 - ok and array by p_array set
* -1 - memory allocation error (errno set)
*/
static int mk_tree(unsigned char **names, int size, unsigned char FS,
struct leaf **p_array);
/* free memory from tree (leafs)
*
* return values:
* nothing
*/
static void free_leafs(struct leaf *array, int size);
/* free memory from source data for tree (names)
*
* return values:
* if 0 <= choice <= size - pointer to name from names,
* and memory for name not released (must be freed later)
* else - NULL (recomended choice -1 for it)
*/
static unsigned char *free_names(unsigned char **names,
int size, int choice);
/* end of static utils for make tree */
/* static utils for ftree */
/* control struct for queue */
struct queue {
int size; /* size of queue */
struct m_queue *first; /* begin of queue */
struct m_queue *last; /* end of queue */
};
/* queue member */
struct m_queue {
void *pointer; /* queue member */
struct m_queue *next; /* next queue member */
};
/* init struct queue by zeros */
static void init_queue(struct queue *queue);
/* add pointer to queue */
/* return - pointer or NULL if error */
static void *p2_queue(struct queue *queue, void *pointer);
/* get first from queue */
/* return - pointer or NULL if queue is empty */
static void *first_queue(struct queue *queue);
/* make zero terminated array from queue */
/* return - pointer to array or NULL if error */
static void **q2arr(struct queue *queue, int depth);
/* smart_tree (for like find(1) with -d flag output compliance) */
/* return - not NULL or NULL if malloc error */
static unsigned char *smart_tree(struct queue *queue, unsigned char FS,
unsigned char *current,
unsigned char *prev);
/* end of static utils for ftree */
/* static utils for saved_tree */
/* saved values for unique tree */
struct saved_tree {
unsigned char **names; /* names + */
int size; /* size + */
unsigned char FS; /* FS + */
int height; /* height + */
int width; /* width + */
int menu_height; /* menu_height - unique for treebox ? */
int ch; /* saved ch - choice */
int sc; /* saved sc - scroll */
};
/* search saved tree within queue */
/* return - struct saved_tree * or NULL if not found */
static struct saved_tree *search_saved_tree(struct queue *queue,
unsigned char **names,
int size,
unsigned char FS,
int height,
int width,
int menu_height);
/* end of static utils for saved_tree */
static void print_item(WINDOW *win, struct leaf item, int choice, int selected);
static void print_position(WINDOW *win, int x, int y,
int cur_pos, int size);
static int menu_width, item_x;
static int dialog_treemenu(unsigned char *title, unsigned char *prompt,
int height, int width, int menu_height,
int item_no, struct leaf items[],
int *result,
int *ch, int *sc);
/*
* Display a menu for choosing among a number of options
*/
static
int dialog_treemenu(unsigned char *title, unsigned char *prompt,
int height, int width, int menu_height,
int item_no, struct leaf items[],
int *result,
int *ch, int *sc)
{
int i, j, x, y, cur_x, cur_y, box_x, box_y, key = 0, button = 0, choice = 0,
l, scroll = 0, max_choice, redraw_menu = FALSE;
WINDOW *dialog, *menu;
if (ch) /* restore menu item info */
choice = *ch;
if (sc)
scroll = *sc;
max_choice = MIN(menu_height, item_no);
item_x = 0;
/* Find length of longest item in order to center menu */
for (i = 0; i < item_no; i++) {
l = strlen(items[i].name) + strlen(items[i].branches) * 4 + 4;
item_x = MAX(item_x, l);
}
if (height < 0)
height = strheight(prompt)+menu_height+4+2;
if (width < 0) {
i = strwidth(prompt);
j = ((title != NULL) ? strwidth(title) : 0);
width = MAX(i,j);
width = MAX(width,item_x+4)+4;
}
width = MAX(width,24);
if (width > COLS)
width = COLS;
if (height > LINES)
height = LINES;
/* center dialog box on screen */
x = (COLS - width)/2;
y = (LINES - height)/2;
#ifdef HAVE_NCURSES
if (use_shadow)
draw_shadow(stdscr, y, x, height, width);
#endif
dialog = newwin(height, width, y, x);
if (dialog == NULL) {
endwin();
fprintf(stderr, "\nnewwin(%d,%d,%d,%d) failed, maybe wrong dims\n", height,width,y,x);
exit(1);
}
keypad(dialog, TRUE);
draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
wattrset(dialog, border_attr);
wmove(dialog, height-3, 0);
waddch(dialog, ACS_LTEE);
for (i = 0; i < width-2; i++)
waddch(dialog, ACS_HLINE);
wattrset(dialog, dialog_attr);
waddch(dialog, ACS_RTEE);
wmove(dialog, height-2, 1);
for (i = 0; i < width-2; i++)
waddch(dialog, ' ');
if (title != NULL) {
wattrset(dialog, title_attr);
wmove(dialog, 0, (width - strlen(title))/2 - 1);
waddch(dialog, ' ');
waddstr(dialog, title);
waddch(dialog, ' ');
}
wattrset(dialog, dialog_attr);
wmove(dialog, 1, 2);
print_autowrap(dialog, prompt, height-1, width-2, width, 1, 2, TRUE, FALSE);
menu_width = width-6;
getyx(dialog, cur_y, cur_x);
box_y = cur_y + 1;
box_x = (width - menu_width)/2 - 1;
/* create new window for the menu */
menu = subwin(dialog, menu_height, menu_width, y + box_y + 1, x + box_x + 1);
if (menu == NULL) {
endwin();
fprintf(stderr, "\nsubwin(dialog,%d,%d,%d,%d) failed, maybe wrong dims\n", menu_height,menu_width,y+box_y+1,x+box_x+1);
exit(1);
}
keypad(menu, TRUE);
/* draw a box around the menu items */
draw_box(dialog, box_y, box_x, menu_height+2, menu_width+2, menubox_border_attr, menubox_attr);
item_x = 1;
/* Print the menu */
for (i = 0; i < max_choice; i++)
print_item(menu, items[(scroll+i)], i, i == choice);
wnoutrefresh(menu);
print_arrows(dialog, scroll, menu_height, item_no, box_x, box_y, item_x, cur_x, cur_y);
print_position(dialog, box_x+menu_width, box_y+menu_height, scroll+choice, item_no);
display_helpline(dialog, height-1, width);
x = width/2-11;
y = height-2;
print_button(dialog, "Cancel", y, x+14, FALSE);
print_button(dialog, " OK ", y, x, TRUE);
wrefresh(dialog);
while (key != ESC) {
key = wgetch(dialog);
/* Check if key pressed matches first character of any item tag in menu */
if (key == KEY_UP || key == KEY_DOWN || key == '-' || key == '+') {
if (key == KEY_UP || key == '-') {
if (!choice) {
if (scroll) {
#ifdef BROKEN_WSCRL
/* wscrl() in ncurses 1.8.1 seems to be broken, causing a segmentation
violation when scrolling windows of height = 4, so scrolling is not
used for now */
scroll--;
getyx(dialog, cur_y, cur_x); /* Save cursor position */
/* Reprint menu to scroll down */
for (i = 0; i < max_choice; i++)
print_item(menu, items[(scroll+i)], i, i == choice);
#else
/* Scroll menu down */
getyx(dialog, cur_y, cur_x); /* Save cursor position */
if (menu_height > 1) {
/* De-highlight current first item before scrolling down */
print_item(menu, items[scroll], 0, FALSE);
scrollok(menu, TRUE);
wscrl(menu, -1);
scrollok(menu, FALSE);
}
scroll--;
print_item(menu, items[scroll], 0, TRUE);
#endif
wnoutrefresh(menu);
print_arrows(dialog, scroll, menu_height, item_no, box_x, box_y, item_x, cur_x, cur_y);
print_position(dialog, box_x+menu_width, box_y+menu_height, scroll+choice, item_no);
wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */
wrefresh(dialog);
}
continue; /* wait for another key press */
}
else
i = choice - 1;
}
else if (key == KEY_DOWN || key == '+') {
if (choice == max_choice - 1) {
if (scroll+choice < item_no-1) {
#ifdef BROKEN_WSCRL
/* wscrl() in ncurses 1.8.1 seems to be broken, causing a segmentation
violation when scrolling windows of height = 4, so scrolling is not
used for now */
scroll++;
getyx(dialog, cur_y, cur_x); /* Save cursor position */
/* Reprint menu to scroll up */
for (i = 0; i < max_choice; i++)
print_item(menu, items[(scroll+i)], i, i == choice);
#else
/* Scroll menu up */
getyx(dialog, cur_y, cur_x); /* Save cursor position */
if (menu_height > 1) {
/* De-highlight current last item before scrolling up */
print_item(menu, items[(scroll+max_choice-1)], max_choice-1, FALSE);
scrollok(menu, TRUE);
scroll(menu);
scrollok(menu, FALSE);
}
scroll++;
print_item(menu, items[(scroll+max_choice-1)], max_choice-1, TRUE);
#endif
wnoutrefresh(menu);
print_arrows(dialog, scroll, menu_height, item_no, box_x, box_y, item_x, cur_x, cur_y);
print_position(dialog, box_x+menu_width, box_y+menu_height, scroll+choice, item_no);
wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */
wrefresh(dialog);
}
continue; /* wait for another key press */
}
else
i = choice + 1;
}
if (i != choice) {
/* De-highlight current item */
getyx(dialog, cur_y, cur_x); /* Save cursor position */
print_item(menu, items[(scroll+choice)], choice, FALSE);
/* Highlight new item */
choice = i;
print_item(menu, items[(scroll+choice)], choice, TRUE);
wnoutrefresh(menu);
print_position(dialog, box_x+menu_width, box_y+menu_height, scroll+choice, item_no);
wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */
wrefresh(dialog);
}
continue; /* wait for another key press */
}
/* save info about menu item position */
if (ch)
*ch = choice;
if (sc)
*sc = scroll;
switch (key) {
case KEY_PPAGE:
case 'B' :
case 'b' :
if (scroll > menu_height) { /* can we go up? */
scroll -= (menu_height);
} else {
scroll = 0;
}
redraw_menu = TRUE;
break;
case KEY_NPAGE:
case 'F' :
case 'f' :
if (scroll + menu_height >= item_no-1 - menu_height) { /* can we go down a full page? */
scroll = item_no - menu_height;
if (scroll < 0) scroll = 0;
} else {
scroll += menu_height;
}
redraw_menu = TRUE;
break;
case KEY_HOME:
case 'g' :
scroll = 0;
choice = 0;
redraw_menu = TRUE;
break;
case KEY_END:
case 'G' :
scroll = item_no - menu_height;
if (scroll < 0) scroll = 0;
choice = max_choice - 1;
redraw_menu = TRUE;
break;
case 'O':
case 'o':
delwin(dialog);
*result = scroll+choice;
return 0;
case 'C':
case 'c':
delwin(dialog);
return 1;
case KEY_BTAB:
case TAB:
case KEY_LEFT:
case KEY_RIGHT:
if (!button) {
button = 1; /* Indicates "Cancel" button is selected */
print_button(dialog, " OK ", y, x, FALSE);
print_button(dialog, "Cancel", y, x+14, TRUE);
}
else {
button = 0; /* Indicates "OK" button is selected */
print_button(dialog, "Cancel", y, x+14, FALSE);
print_button(dialog, " OK ", y, x, TRUE);
}
wrefresh(dialog);
break;
case ' ':
case '\r':
case '\n':
delwin(dialog);
if (!button)
*result = scroll+choice;
return button;
case ESC:
break;
case KEY_F(1):
case '?':
display_helpfile();
break;
}
if (redraw_menu) {
for (i = 0; i < max_choice; i++) {
print_item(menu, items[(scroll+i)],
i, i == choice);
}
wnoutrefresh(menu);
getyx(dialog, cur_y, cur_x); /* Save cursor position */
print_arrows(dialog, scroll, menu_height, item_no, box_x, box_y, item_x, cur_x, cur_y);
print_position(dialog, box_x+menu_width, box_y+menu_height, scroll+choice, item_no);
wmove(dialog, cur_y, cur_x); /* Restore cursor to previous position */
wrefresh(dialog);
redraw_menu = FALSE;
}
}
delwin(dialog);
return -1; /* ESC pressed */
}
/* End of dialog_treemenu() */
/*
* Print menu item
*/
static void print_item(WINDOW *win, struct leaf item, int choice, int selected)
{
int i, j = menu_width - 2;
char *branches = item.branches;
/* Clear 'residue' of last item */
wattrset(win, menubox_attr);
wmove(win, choice, 0);
for (i = 0; i < menu_width; i++)
waddch(win, ' ');
wmove(win, choice, item_x);
while(*branches && j)
{
switch (*branches++) {
case ' ' : waddch(win, ' ');
break;
case '|' : waddch(win, ACS_VLINE);
}
j--;
i = 3;
while(i-- && j)
{
waddch(win, ' ');
j--;
}
}
if (j)
{
switch (item.slip) {
case '+' : waddch(win, ACS_LTEE);
break;
case '`' : waddch(win, ACS_LLCORNER);
}
j--;
}
i = 3;
while(i-- && j)
{
waddch(win, ACS_HLINE);
j--;
}
wattrset(win, selected ? item_selected_attr : item_attr);
if (j)
waddnstr(win, item.name, j);
}
/* End of print_item() */
/*
* Print current position
*/
static void print_position(WINDOW *win, int x, int y,
int cur_pos, int size)
{
int percent;
wattrset(win, position_indicator_attr);
percent = cur_pos == size - 1 ? 100 : (cur_pos * 100)/(size - 1);
wmove(win, y + 1, x - 6);
wprintw(win, "(%3d%%)", percent);
}
/* End of print_position() */
/*
* Display a tree menu from file
*
* filename - file with like find(1) output
* FS - fields separator
* title - title of dialog box
* prompt - prompt text into dialog box
* height - height of dialog box
* width - width of dialog box
* menu_height - height of menu box
* result - pointer to char array
*
* return values:
* -1 - ESC pressed
* 0 - Ok, result set (must be freed later)
* 1 - Cancel
*/
int dialog_ftree(unsigned char *filename, unsigned char FS,
unsigned char *title, unsigned char *prompt,
int height, int width, int menu_height,
unsigned char **result)
{
int retcode, choice, size;
struct leaf *items;
unsigned char **names;
if (mk_ftree(filename, &names, &size, FS, &items))
{
perror("dialog_ftree");
end_dialog();
exit(-1);
}
if (!size)
{
fprintf(stderr, "\ndialog_ftree: file %s is empty\n", filename);
end_dialog();
exit(-1);
}
retcode = dialog_treemenu(title, prompt, height, width, menu_height,
size, items, &choice, NULL, NULL);
free_leafs(items, size);
if (!retcode)
*result = free_names(names, size, choice);
else
(void)free_names(names, size, -1);
return retcode;
}
/* End of dialog_ftree() */
/*
* Display a tree menu from array
*
* names - array with like find(1) output
* size - size of array
* FS - fields separator
* title - title of dialog box
* prompt - prompt text into dialog box
* height - height of dialog box
* width - width of dialog box
* menu_height - height of menu box
* result - pointer to char array
*
* return values:
* -1 - ESC pressed
* 0 - Ok, result set
* 1 - Cancel
*/
int dialog_tree(unsigned char **names, int size, unsigned char FS,
unsigned char *title, unsigned char *prompt,
int height, int width, int menu_height,
unsigned char **result)
{
int retcode, choice;
struct leaf *items;
struct saved_tree *st;
static struct queue *q_saved_tree = NULL;
if (!size)
{
fprintf(stderr, "\ndialog_tree: source array is empty\n");
end_dialog();
exit(-1);
}
if (mk_tree(names, size, FS, &items))
{
perror("dialog_tree");
end_dialog();
exit(-1);
}
/* is tree saved ? */
if (!(st = search_saved_tree(q_saved_tree, names,
size, FS,
height, width, menu_height))) {
if (!q_saved_tree) {
if (!(q_saved_tree =
calloc(sizeof (struct queue), 1))) {
perror("dialog_tree");
end_dialog();
exit(-1);
}
}
if (!(st = calloc(sizeof (struct saved_tree), 1))) {
perror("dialog_tree");
end_dialog();
exit(-1);
}
st->names = names;
st->size = size;
st->FS = FS;
st->height = height;
st->width = width;
st->menu_height = menu_height;
if (!p2_queue(q_saved_tree, st)) {
perror("dialog_tree");
end_dialog();
exit(-1);
}
}
retcode = dialog_treemenu(title, prompt, height, width, menu_height,
size, items, &choice,
&(st->ch), &(st->sc));
free_leafs(items, size);
if (!retcode)
*result = names[choice];
return retcode;
}
/* End of dialog_tree() */
/* utils for ftree */
/* init struct queue by zeros */
static void
init_queue(struct queue *queue)
{
bzero((void *)queue, sizeof(struct queue));
}
/* add pointer to queue */
/* return - pointer or NULL if error */
static void *
p2_queue(struct queue *queue, void *pointer)
{
if (!queue)
return NULL;
if (!queue->first)
{
if (!(queue->first = queue->last =
calloc(1, sizeof(struct m_queue))))
return NULL;
}
else
{
if (!(queue->last->next =
calloc(1, sizeof(struct m_queue))))
return NULL;
queue->last = queue->last->next;
}
queue->size++;
return queue->last->pointer = pointer;
}
/* get first from queue */
/* return - pointer or NULL if queue is empty */
static void *
first_queue(struct queue *queue)
{
void *retval;
struct m_queue *new_first;
if (!queue ||
!queue->first ||
!queue->size)
return NULL;
retval = queue->first->pointer;
new_first = queue->first->next;
free(queue->first);
queue->first = new_first;
queue->size--;
return retval;
}
/* make zero terminated array from queue */
/* return - pointer to array or NULL if error */
static void **
q2arr(struct queue *queue, int depth)
{
void **mono, **end;
if (!queue ||
!queue->first ||
!queue->size)
return NULL;
/* memory allocation for array */
if (!(mono = end = malloc(depth * sizeof(void *) + 1)))
return NULL;
while(depth--)
{
if (!(*end++ = first_queue(queue)))
break;
}
*end = NULL;
return mono;
}
/*
* smart_tree (for like find(1) with -d flag output compliance)
*
* return values:
* NULL - malloc error
* not NULL - ok
*
*/
static
unsigned char *
smart_tree(struct queue *queue,
unsigned char FS,
unsigned char *current,
unsigned char *prev) {
unsigned char *pcurrent = current, *pprev = prev, *toqueue;
register char break_flag = 0;
while(*pcurrent && *pprev) {
if (*pcurrent == *pprev) {
pcurrent++;
pprev++;
}
else {
break_flag = 1;
break;
}
}
if (!*pprev || break_flag) {
if (*pcurrent == FS) {
pcurrent++;
if ((!*prev) && (*pcurrent)) {
unsigned char tchar = *pcurrent;
*pcurrent = '\0';
if (!(toqueue = strdup(current))) {
*pcurrent = tchar;
return NULL;
}
if (!p2_queue(queue, toqueue)) {
*pcurrent = tchar;
return NULL;
}
*pcurrent = tchar;
}
}
while(*pcurrent) {
if (*pcurrent == FS) {
*pcurrent = '\0';
if (!(toqueue = strdup(current))) {
*pcurrent = FS;
return NULL;
}
if (!p2_queue(queue, toqueue)) {
*pcurrent = FS;
return NULL;
}
*pcurrent = FS;
}
pcurrent++;
}
if (!p2_queue(queue, current))
return NULL;
}
return current;
}
/* end of utils for ftree */
/* utils for make tree */
/* if error - return -1 */
static
int
mk_slip(struct leaf array[], int arr_size, int number, int shift)
{
int t_number;
int t_shift;
if (number > arr_size - 1)
return number - 1;
t_shift = shift;
if (!(array[number].branches = calloc(1, t_shift + 1)))
return -1;
(void)memset(array[number].branches, ' ', t_shift);
t_number = number;
while (array[number].shift < array[t_number + 1].shift)
{
t_number = mk_slip(array, arr_size, t_number + 1, t_shift + 1);
if (t_number < 0)
return -1;
if (t_number == arr_size - 1)
break;
}
if (array[number].shift == array[t_number + 1].shift)
array[number].slip = '+';
if ((array[number].shift > array[t_number + 1].shift) ||
t_number == arr_size - 1)
array[number].slip = '`';
return t_number;
} /* mk_slip() */
/* make tree from file
*
* filename - name of file with like find(1) output
* p_names - pointer to array of strings
* p_size - pointer to size of array
* FS - fields separator
* p_array - pointer to array of leafs
*
* return values:
* 0 - ok and names by p_names, size by p_size, array by p_array set
* -1 - memory allocation error (errno set)
*/
static
int
mk_ftree(char *filename,
unsigned char ***p_names, int *p_size, unsigned char FS,
struct leaf **p_array)
{
int NR; /* number of input records */
struct queue queue;
unsigned char *string, *sstring = "";
unsigned char **names;
FILE *input_file;
if (!(input_file = fopen(filename, "r")))
return -1;
init_queue(&queue);
if (!(string = malloc(BUFSIZ)))
return -1;
/* read input file into queue */
while(fgets(string, BUFSIZ, input_file))
{
if (strchr(string, '\n'))
*strchr(string, '\n') = '\0';
if (!(string = realloc(string, strlen(string) + 1)))
return -1;
if (!smart_tree(&queue, FS, string, sstring))
return -1;
sstring = string;
if (!(string = malloc(BUFSIZ)))
return -1;
} /* read input file into queue */
if (fclose(input_file) == EOF)
return -1;
if (!(NR = queue.size))
{
*p_size = 0;
return 0;
}
/* make array from queue */
if (!(names = (unsigned char **)q2arr(&queue, NR)))
return -1;
*p_names = names;
*p_size = NR;
/* make tree from array */
return mk_tree(names, NR, FS, p_array);
} /* mk_ftree */
/* make tree from array
*
* names - array of strings
* size - size of array
* FS - fields separator
* p_array - pointer to array of leafs
*
* return values:
* 0 - ok and array by p_array set
* -1 - memory allocation error (errno set)
*/
static
int
mk_tree(unsigned char **names, int size, unsigned char FS,
struct leaf **p_array)
{
int i;
struct leaf *array;
/* make array of leafs */
if (!(array = calloc(size, sizeof(struct leaf))))
return -1;
/* init leafs */
for (i = 0; i < size; i++)
{
unsigned char *in_string, *name;
int shift = 0;
in_string = name = names[i];
while(*in_string)
{
if (*in_string == FS) {
if (!i && !*(in_string + 1))
name = in_string;
else
{
shift++;
name = in_string + 1;
}
}
in_string++;
}
array[i].name = name;
array[i].shift = shift;
array[i].slip = '\0';
array[i].branches = NULL;
} /* init leafs */
/* make slips */
for (i = 0;i < size; i++)
{
i = mk_slip(array, size, i, 0);
if (i < 0)
return -1;
} /* make slips */
/* make branches */
for (i = 1;i < size; i++)
{
unsigned char *src = array[i - 1].branches;
unsigned char *dst = array[i].branches;
while(*src && *dst)
*dst++ = *src++;
if (*dst)
switch (array[i - 1].slip) {
case '+' : *dst = '|';
break;
case '`' : *dst = ' ';
}
} /* make branches */
*p_array = array;
return 0;
} /* mk_tree() */
/* free memory from tree (leafs)
*
* return values:
* nothing
*/
static
void
free_leafs(struct leaf *array, int size)
{
struct leaf *p_array = array;
while (size--)
free(array++->branches);
free(p_array);
} /* free_leafs() */
/* free memory from source data for tree (names)
*
* return values:
* if 0 <= choice <= size - pointer to name from names,
* and memory for name not released (must be freed later)
* else - NULL (recomended choice -1 for it)
*/
static
unsigned char *
free_names(unsigned char **names, int size, int choice)
{
unsigned char *retval = NULL;
unsigned char **p_names = names;
while (size--)
{
if (!choice--)
retval = *names++;
else
free(*names++);
}
free(p_names);
return retval;
} /* free_names() */
/* end of utils for make tree */
/* static utils for saved_tree */
/* search saved tree within queue */
/* return - struct *saved_tree or NULL if not found */
static
struct saved_tree *
search_saved_tree(struct queue *queue, unsigned char **names, int size,
unsigned char FS,
int height, int width,
int menu_height)
{
struct m_queue *member;
struct saved_tree *retval;
if (!queue || !names || !FS ||
!height || !width || !menu_height)
return NULL;
if (!(member = queue->first))
return NULL;
while (member->next) {
retval = member->pointer;
if ((names == retval->names) &&
(size == retval->size) &&
(FS == retval->FS) &&
(height == retval->height) &&
(width == retval->width) &&
(menu_height == retval->menu_height))
return retval;
member = member->next;
}
retval = member->pointer;
if ((names == retval->names) &&
(size == retval->size) &&
(FS == retval->FS) &&
(height == retval->height) &&
(width == retval->width) &&
(menu_height == retval->menu_height))
return retval;
return NULL;
}
/* end of static utils for saved_tree */
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