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ee.c
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ee.c
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/*
| ee (easy editor)
|
| An easy to use, simple screen oriented editor.
|
| written by Hugh Mahon
|
| THIS MATERIAL IS PROVIDED "AS IS". THERE ARE
| NO WARRANTIES OF ANY KIND WITH REGARD TO THIS
| MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE
| IMPLIED WARRANTIES OF MERCHANTABILITY AND
| FITNESS FOR A PARTICULAR PURPOSE. Neither
| Hewlett-Packard nor Hugh Mahon shall be liable
| for errors contained herein, nor for
| incidental or consequential damages in
| connection with the furnishing, performance or
| use of this material. Neither Hewlett-Packard
| nor Hugh Mahon assumes any responsibility for
| the use or reliability of this software or
| documentation. This software and
| documentation is totally UNSUPPORTED. There
| is no support contract available. Hewlett-
| Packard has done NO Quality Assurance on ANY
| of the program or documentation. You may find
| the quality of the materials inferior to
| supported materials.
|
| This software is not a product of Hewlett-Packard, Co., or any
| other company. No support is implied or offered with this software.
| You've got the source, and you're on your own.
|
| This software may be distributed under the terms of Larry Wall's
| Artistic license, a copy of which is included in this distribution.
|
| This notice must be included with this software and any derivatives.
|
| This editor was purposely developed to be simple, both in
| interface and implementation. This editor was developed to
| address a specific audience: the user who is new to computers
| (especially UNIX).
|
| ee is not aimed at technical users; for that reason more
| complex features were intentionally left out. In addition,
| ee is intended to be compiled by people with little computer
| experience, which means that it needs to be small, relatively
| simple in implementation, and portable.
|
| This software and documentation contains
| proprietary information which is protected by
| copyright. All rights are reserved.
|
| $Header: /var/cvs/dgamelaunch/ee.c,v 1.10 2004/01/26 16:54:02 joshk Exp $
|
*/
#include <wchar.h>
wchar_t *ee_copyright_message =
L"Copyright (c) 1986, 1990, 1991, 1992, 1993, 1994, 1995, 1996 Hugh Mahon ";
wchar_t *ee_long_notice[] = {
L"This software and documentation contains",
L"proprietary information which is protected by",
L"copyright. All rights are reserved."
};
wchar_t *version = L"@(#) ee, version 1.4.1 $Revision: 1.10 $";
#include <locale.h>
#include <curses.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <pwd.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <ctype.h>
#ifndef SIGCHLD
#define SIGCHLD SIGCLD
#endif
#define MAX_FILE 1048576
#define TAB 9
#define max(a, b) (a > b ? a : b)
#define min(a, b) (a < b ? a : b)
/*
| defines for type of data to show in info window
*/
#define CONTROL_KEYS 1
#define COMMANDS 2
struct text {
wchar_t *line; /* line of characters */
int line_number; /* line number */
int line_length; /* actual number of characters in the line */
int max_length; /* maximum number of characters the line handles */
struct text *next_line; /* next line of text */
struct text *prev_line; /* previous line of text */
};
struct text *first_line; /* first line of current buffer */
struct text *dlt_line; /* structure for info on deleted line */
struct text *curr_line; /* current line cursor is on */
struct text *tmp_line; /* temporary line pointer */
struct text *srch_line; /* temporary pointer for search routine */
int d_wrd_len; /* length of deleted word */
int position; /* offset in bytes from begin of line */
int scr_pos; /* horizontal position */
int scr_vert; /* vertical position on screen */
int scr_horz; /* horizontal position on screen */
int tmp_vert, tmp_horz;
int input_file; /* indicate to read input file */
int recv_file; /* indicate reading a file */
int edit; /* continue executing while true */
int gold; /* 'gold' function key pressed */
int fildes; /* file descriptor */
int case_sen; /* case sensitive search flag */
int last_line; /* last line for text display */
int last_col; /* last column for text display */
int horiz_offset = 0; /* offset from left edge of text */
int clear_com_win; /* flag to indicate com_win needs clearing */
int text_changes = FALSE; /* indicate changes have been made to text */
int get_fd; /* file descriptor for reading a file */
int info_window = TRUE; /* flag to indicate if help window visible */
int info_type = CONTROL_KEYS; /* flag to indicate type of info to display */
int expand_tabs = TRUE; /* flag for expanding tabs */
int right_margin = 0; /* the right margin */
int observ_margins = TRUE; /* flag for whether margins are observed */
int out_pipe; /* flag that info is piped out */
int in_pipe; /* flag that info is piped in */
int formatted = FALSE; /* flag indicating paragraph formatted */
int nohighlight = FALSE; /* turns off highlighting */
int eightbit = TRUE; /* eight bit character flag */
int local_LINES = 0; /* copy of LINES, to detect when win resizes */
int local_COLS = 0; /* copy of COLS, to detect when win resizes */
int curses_initialized = FALSE; /* flag indicating if curses has been started*/
int emacs_keys_mode = TRUE; /* mode for if emacs key binings are used */
wchar_t *point; /* points to current position in line */
wchar_t *srch_str; /* pointer for search string */
wchar_t *u_srch_str; /* pointer to non-case sensitive search */
wchar_t *srch_1; /* pointer to start of suspect string */
wchar_t *srch_2; /* pointer to next character of string */
wchar_t *srch_3;
char *in_file_name = NULL; /* name of input file */
char *tmp_file; /* temporary file name */
wchar_t *d_char; /* deleted character */
wchar_t *d_word; /* deleted word */
wchar_t *d_line; /* deleted line */
wchar_t *start_at_line = NULL; /* move to this line at start of session*/
int in; /* input character */
FILE *temp_fp; /* temporary file pointer */
wchar_t *table[] = {
L"^@", L"^A", L"^B", L"^C", L"^D", L"^E", L"^F", L"^G", L"^H", L"\t", L"^J",
L"^K", L"^L", L"^M", L"^N", L"^O", L"^P", L"^Q", L"^R", L"^S", L"^T", L"^U",
L"^V", L"^W", L"^X", L"^Y", L"^Z", L"^[", L"^\\", L"^]", L"^^", L"^_"
};
WINDOW *com_win;
WINDOW *text_win;
WINDOW *help_win;
WINDOW *info_win;
#if defined(__STDC__) || defined(__cplusplus)
#define P_(s) s
#else
#define P_(s) ()
#endif
/*
| The following structure allows menu items to be flexibly declared.
| The first item is the string describing the selection, the second
| is the address of the procedure to call when the item is selected,
| and the third is the argument for the procedure.
|
| For those systems with i18n, the string should be accompanied by a
| catalog number. The 'int *' should be replaced with 'void *' on
| systems with that type.
|
| The first menu item will be the title of the menu, with NULL
| parameters for the procedure and argument, followed by the menu items.
|
| If the procedure value is NULL, the menu item is displayed, but no
| procedure is called when the item is selected. The number of the
| item will be returned. If the third (argument) parameter is -1, no
| argument is given to the procedure when it is called.
*/
struct menu_entries
{
wchar_t *item_string;
int (*procedure)P_((struct menu_entries *));
struct menu_entries *ptr_argument;
int (*iprocedure)P_((int));
void (*nprocedure)P_((void));
int argument;
};
int main(int argc, char *argv[]);
wchar_t *resiz_line(int factor, struct text *rline, int rpos);
void insert(int character);
void delete(int disp);
void scanline(wchar_t *pos);
int tabshift(int temp_int);
int out_char(WINDOW *window, int character, int column);
int len_char(wchar_t character, int column);
void draw_line(int vertical, int horiz, wchar_t *ptr, int t_pos, int length);
void insert_line(int disp);
struct text *txtalloc(void);
wchar_t *next_word(wchar_t *string);
void prev_word(void);
void control(void);
void emacs_control(void);
void bottom(void);
void top(void);
void nextline(void);
void prevline(void);
void left(int disp);
void right(int disp);
void find_pos(void);
void up(void);
void down(void);
void function_key(void);
void command_prompt(void);
void command(wchar_t *cmd_str1);
int scan(wchar_t *line, int offset, int column);
wchar_t *get_string(wchar_t *prompt, int advance);
int compare(wchar_t *string1, wchar_t *string2, int sensitive);
void goto_line(wchar_t *cmd_str);
void midscreen(int line, wchar_t *pnt);
void check_fp(void);
void get_file(char *file_name);
void get_line(int length, char *in_string, int *append);
void draw_screen(void);
void ee_finish(void);
int quit(int noverify);
void edit_abort(int arg);
void delete_text(void);
int write_file(char *file_name, int fd);
int search(int display_message);
void search_prompt(void);
void del_char(void);
void undel_char(void);
void del_word(void);
void undel_word(void);
void del_line(void);
void undel_line(void);
void adv_word(void);
void move_rel(char direction, int lines);
void eol(void);
void bol(void);
void adv_line(void);
void set_up_term(void);
void resize_check(void);
int menu_op(struct menu_entries menu_list[]);
void paint_menu(struct menu_entries menu_list[], int max_width, int max_height, int list_size, int top_offset, WINDOW *menu_win, int off_start, int vert_size);
void help(void);
void paint_info_win(void);
void no_info_window(void);
void create_info_window(void);
int file_op(int arg);
void leave_op(void);
void redraw(void);
int Blank_Line(struct text *test_line);
void echo_string(wchar_t *string);
int first_word_len(struct text *test_line);
wchar_t *is_in_string(wchar_t *string, wchar_t *substring);
int unique_test(wchar_t *string, wchar_t *list[]);
void strings_init(void);
#undef P_
/*
| allocate space here for the strings that will be in the menu
*/
struct menu_entries leave_menu[] = {
{L"", NULL, NULL, NULL, NULL, -1},
{L"", NULL, NULL, NULL, ee_finish, -1},
{L"", NULL, NULL, quit, NULL, TRUE},
{NULL, NULL, NULL, NULL, NULL, -1}
};
#define READ_FILE 1
#define WRITE_FILE 2
#define SAVE_FILE 3
struct menu_entries search_menu[] = {
{L"", NULL, NULL, NULL, NULL, 0},
{L"", NULL, NULL, NULL, search_prompt, -1},
{L"", NULL, NULL, search, NULL, TRUE},
{NULL, NULL, NULL, NULL, NULL, -1}
};
struct menu_entries main_menu[] = {
{L"", NULL, NULL, NULL, NULL, -1},
{L"", NULL, NULL, NULL, leave_op, -1},
{L"", NULL, NULL, NULL, help, -1},
{L"", NULL, NULL, file_op, NULL, SAVE_FILE},
{L"", NULL, NULL, NULL, redraw, -1},
{L"", menu_op, search_menu, NULL, NULL, -1},
{NULL, NULL, NULL, NULL, NULL, -1}
};
wchar_t *help_text[23];
wchar_t *control_keys[5];
wchar_t *emacs_help_text[22];
wchar_t *emacs_control_keys[5];
wchar_t *command_strings[5];
wchar_t *commands[32];
#define MENU_WARN 1
#define max_alpha_char 36
/*
| Declarations for strings for localization
*/
wchar_t *com_win_message; /* to be shown in com_win if no info window */
char *no_file_string;
wchar_t *ascii_code_str;
wchar_t *command_str;
char *char_str;
char *unkn_cmd_str;
wchar_t *non_unique_cmd_msg;
char *line_num_str;
char *line_len_str;
char *current_file_str;
wchar_t *usage0;
wchar_t *usage1;
wchar_t *usage2;
wchar_t *usage3;
wchar_t *usage4;
char *file_is_dir_msg;
char *new_file_msg;
char *cant_open_msg;
wchar_t *open_file_msg;
char *file_read_fin_msg;
char *reading_file_msg;
char *read_only_msg;
char *file_read_lines_msg;
wchar_t *save_file_name_prompt;
char *file_not_saved_msg;
wchar_t *changes_made_prompt;
wchar_t *yes_char;
wchar_t *file_exists_prompt;
char *create_file_fail_msg;
char *writing_file_msg;
char *file_written_msg;
char *searching_msg;
char *str_not_found_msg;
wchar_t *search_prompt_str;
wchar_t *continue_msg;
wchar_t *menu_cancel_msg;
wchar_t *menu_size_err_msg;
wchar_t *press_any_key_msg;
wchar_t *ON;
wchar_t *OFF;
wchar_t *HELP;
wchar_t *SAVE;
wchar_t *READ;
wchar_t *LINE;
wchar_t *FILE_str;
wchar_t *CHARACTER;
wchar_t *REDRAW;
wchar_t *RESEQUENCE;
wchar_t *AUTHOR;
wchar_t *ee_VERSION;
wchar_t *CASE;
wchar_t *NOCASE;
wchar_t *EXPAND;
wchar_t *NOEXPAND;
wchar_t *Exit_string;
wchar_t *QUIT_string;
wchar_t *INFO;
wchar_t *NOINFO;
wchar_t *MARGINS;
wchar_t *NOMARGINS;
wchar_t *AUTOFORMAT;
wchar_t *NOAUTOFORMAT;
wchar_t *Echo;
wchar_t *PRINTCOMMAND;
wchar_t *RIGHTMARGIN;
wchar_t *HIGHLIGHT;
wchar_t *NOHIGHLIGHT;
wchar_t *EIGHTBIT;
wchar_t *NOEIGHTBIT;
wchar_t *EMACS_string;
wchar_t *NOEMACS_string;
wchar_t *cancel_string;
char *menu_too_lrg_msg;
wchar_t *more_above_str, *more_below_str;
#ifndef __STDC__
#ifndef HAS_STDLIB
extern char *malloc();
extern char *realloc();
extern char *getenv();
FILE *fopen(); /* declaration for open function */
#endif /* HAS_STDLIB */
#endif /* __STDC__ */
int
main(argc, argv) /* beginning of main program */
int argc;
char *argv[];
{
int counter;
setlocale(LC_ALL, "");
for (counter = 1; counter < 24; counter++)
{
if (!(counter == SIGKILL || counter == SIGSTOP))
signal(counter, SIG_IGN);
}
signal(SIGCHLD, SIG_DFL);
signal(SIGSEGV, SIG_DFL);
signal(SIGINT, edit_abort);
d_char = malloc(3 * sizeof(wchar_t)); /* provide a buffer for multi-byte chars */
d_word = malloc(150 * sizeof(wchar_t));
*d_word = '\0';
d_line = NULL;
dlt_line = txtalloc();
dlt_line->line = d_line;
dlt_line->line_length = 0;
curr_line = first_line = txtalloc();
curr_line->line = point = malloc(10 * sizeof(wchar_t));
curr_line->line_length = 1;
curr_line->max_length = 10;
curr_line->prev_line = NULL;
curr_line->next_line = NULL;
curr_line->line_number = 1;
srch_str = NULL;
u_srch_str = NULL;
position = 1;
scr_pos =0;
scr_vert = 0;
scr_horz = 0;
edit = TRUE;
gold = case_sen = FALSE;
strings_init();
if (argc != 2)
{
puts("need a filename! bailing out.");
return 1;
}
else
{
tmp_file = strdup(argv[1]);
input_file = recv_file = TRUE;
}
set_up_term();
if (right_margin == 0)
right_margin = COLS - 1;
if (!tmp_file)
{
wprintw(com_win, no_file_string);
wrefresh(com_win);
}
else
check_fp();
clear_com_win = TRUE;
while(edit)
{
int keyt;
wrefresh(text_win);
keyt = wget_wch(text_win, &in);
if (keyt == ERR)
exit(0);
resize_check();
if (clear_com_win)
{
clear_com_win = FALSE;
wmove(com_win, 0, 0);
werase(com_win);
if (!info_window)
{
wprintw(com_win, "%S", com_win_message);
}
wrefresh(com_win);
}
if (keyt == KEY_CODE_YES)
function_key();
else if ((in == '\10') || (in == 127))
{
in = 8; /* make sure key is set to backspace */
delete(TRUE);
}
else if ((in > 31) || (in == 9))
insert(in);
else if ((in >= 0) && (in <= 31))
{
if (emacs_keys_mode)
emacs_control();
else
control();
}
}
return(0);
}
wchar_t *
resiz_line(factor, rline, rpos) /* resize the line to length + factor*/
int factor; /* resize factor */
struct text *rline; /* position in line */
int rpos;
{
wchar_t *rpoint;
int resiz_var;
rline->max_length += factor;
rpoint = rline->line = realloc(rline->line, rline->max_length * sizeof(wchar_t));
for (resiz_var = 1 ; (resiz_var < rpos) ; resiz_var++)
rpoint++;
return(rpoint);
}
void
insert(character) /* insert character into line */
int character; /* new character */
{
int counter;
int value;
wchar_t *temp; /* temporary pointer */
wchar_t *temp2; /* temporary pointer */
if ((character == '\011') && (expand_tabs))
{
counter = len_char('\011', scr_horz);
for (; counter > 0; counter--)
insert(' ');
return;
}
text_changes = TRUE;
if ((curr_line->max_length - curr_line->line_length) < 5)
point = resiz_line(10, curr_line, position);
curr_line->line_length++;
temp = point;
counter = position;
while (counter < curr_line->line_length) /* find end of line */
{
counter++;
temp++;
}
temp++; /* increase length of line by one */
while (point < temp)
{
temp2=temp - 1;
*temp= *temp2; /* shift characters over by one */
temp--;
}
*point = character; /* insert new character */
wclrtoeol(text_win);
if ((character >= 0) && (character < ' ')) /* check for TAB character*/
{
scr_pos = scr_horz += out_char(text_win, character, scr_horz);
point++;
position++;
}
else
{
waddnwstr(text_win, &character, 1);
scr_pos = ++scr_horz;
point++;
position ++;
}
if ((observ_margins) && (right_margin < scr_pos))
{
counter = position;
while (scr_pos > right_margin)
prev_word();
if (scr_pos == 0)
{
while (position < counter)
right(TRUE);
}
else
{
counter -= position;
insert_line(TRUE);
for (value = 0; value < counter; value++)
right(TRUE);
}
}
if ((scr_horz - horiz_offset) > last_col)
{
horiz_offset += 8;
midscreen(scr_vert, point);
}
else if ((character != ' ') && (character != '\t'))
formatted = FALSE;
draw_line(scr_vert, scr_horz, point, position, curr_line->line_length);
}
void
delete(disp) /* delete character */
int disp;
{
wchar_t *tp;
wchar_t *temp2;
struct text *temp_buff;
int temp_vert;
int temp_pos;
int del_width = 1;
if (point != curr_line->line) /* if not at beginning of line */
{
text_changes = TRUE;
temp2 = tp = point;
tp -= del_width;
point -= del_width;
position -= del_width;
temp_pos = position;
curr_line->line_length -= del_width;
if ((*tp < ' ') || (*tp >= 127)) /* check for TAB */
scanline(tp);
else
scr_horz -= del_width;
scr_pos = scr_horz;
if (in == 8)
{
if (del_width == 1)
*d_char = *point; /* save deleted character */
else
{
d_char[0] = *point;
d_char[1] = *(point + 1);
}
d_char[del_width] = '\0';
}
while (temp_pos <= curr_line->line_length)
{
temp_pos++;
*tp = *temp2;
tp++;
temp2++;
}
if (scr_horz < horiz_offset)
{
horiz_offset -= 8;
midscreen(scr_vert, point);
}
}
else if (curr_line->prev_line != NULL)
{
text_changes = TRUE;
left(disp); /* go to previous line */
temp_buff = curr_line->next_line;
point = resiz_line(temp_buff->line_length, curr_line, position);
if (temp_buff->next_line != NULL)
temp_buff->next_line->prev_line = curr_line;
curr_line->next_line = temp_buff->next_line;
temp2 = temp_buff->line;
if (in == 8)
{
d_char[0] = '\n';
d_char[1] = '\0';
}
tp = point;
temp_pos = 1;
while (temp_pos < temp_buff->line_length)
{
curr_line->line_length++;
temp_pos++;
*tp = *temp2;
tp++;
temp2++;
}
*tp = '\0';
free(temp_buff->line);
free(temp_buff);
temp_buff = curr_line;
temp_vert = scr_vert;
scr_pos = scr_horz;
if (scr_vert < last_line)
{
wmove(text_win, scr_vert + 1, 0);
wdeleteln(text_win);
}
while ((temp_buff != NULL) && (temp_vert < last_line))
{
temp_buff = temp_buff->next_line;
temp_vert++;
}
if ((temp_vert == last_line) && (temp_buff != NULL))
{
tp = temp_buff->line;
wmove(text_win, last_line,0);
wclrtobot(text_win);
draw_line(last_line, 0, tp, 1, temp_buff->line_length);
wmove(text_win, scr_vert, (scr_horz - horiz_offset));
}
}
draw_line(scr_vert, scr_horz, point, position, curr_line->line_length);
formatted = FALSE;
}
void
scanline(pos) /* find the proper horizontal position for the pointer */
wchar_t *pos;
{
int temp;
wchar_t *ptr;
ptr = curr_line->line;
temp = 0;
while (ptr < pos)
{
if (*ptr <= 8)
temp += 2;
else if (*ptr == 9)
temp += tabshift(temp);
else if ((*ptr >= 10) && (*ptr <= 31))
temp += 2;
else if ((*ptr >= 32) && (*ptr < 127))
temp++;
else if (*ptr == 127)
temp += 2;
else if (!eightbit)
temp += 5;
else
temp++;
ptr++;
}
scr_horz = temp;
if ((scr_horz - horiz_offset) > last_col)
{
horiz_offset = (scr_horz - (scr_horz % 8)) - (COLS - 8);
midscreen(scr_vert, point);
}
else if (scr_horz < horiz_offset)
{
horiz_offset = max(0, (scr_horz - (scr_horz % 8)));
midscreen(scr_vert, point);
}
}
int
tabshift(temp_int) /* give the number of spaces to shift */
int temp_int;
{
int leftover;
leftover = ((temp_int + 1) % 8);
if (leftover == 0)
return (1);
else
return (9 - leftover);
}
int
out_char(window, character, column) /* output non-printing character */
WINDOW *window;
int character;
int column;
{
int i1, i2;
wchar_t *string;
if (character == TAB)
{
i1 = tabshift(column);
for (i2 = 0;
(i2 < i1) && (((column+i2+1)-horiz_offset) < last_col); i2++)
{
waddch(window, ' ');
}
return(i1);
}
else if ((character >= '\0') && (character < ' '))
{
string = table[(int) character];
}
else
{
waddnwstr(window, &character, 1);
return(1);
}
for (i2 = 0; (string[i2] != '\0') && (((column+i2+1)-horiz_offset) < last_col); i2++)
waddch(window, string[i2]);
return(wcslen(string));
}
int
len_char(character, column) /* return the length of the character */
wchar_t character;
int column; /* the column must be known to provide spacing for tabs */
{
int length;
if (character == '\t')
length = tabshift(column);
else if ((character >= 0) && (character < 32))
length = 2;
else if ((character >= 32) && (character <= 126))
length = 1;
else if (character == 127)
length = 2;
else if (((character > 126) || (character < 0)) && (!eightbit))
length = 5;
else
length = 1;
return(length);
}
void
draw_line(vertical, horiz, ptr, t_pos, length) /* redraw line from current position */
int vertical; /* current vertical position on screen */
int horiz; /* current horizontal position on screen */
wchar_t *ptr; /* pointer to line */
int t_pos; /* current position (offset in bytes) from bol */
int length; /* length (in bytes) of line */
{
int d; /* partial length of special or tab char to display */
wchar_t *temp; /* temporary pointer to position in line */
int abs_column; /* offset in screen units from begin of line */
int column; /* horizontal position on screen */
int row; /* vertical position on screen */
int posit; /* temporary position indicator within line */
abs_column = horiz;
column = horiz - horiz_offset;
row = vertical;
temp = ptr;
d = 0;
posit = t_pos;
if (column < 0)
{
wmove(text_win, row, 0);
wclrtoeol(text_win);
}
while (column < 0)
{
d = len_char(*temp, abs_column);
abs_column += d;
column += d;
posit++;
temp++;
}
wmove(text_win, row, column);
wclrtoeol(text_win);
while ((posit < length) && (column <= last_col))
{
if (*temp < 32)
{
column += len_char(*temp, abs_column);
abs_column += out_char(text_win, *temp, abs_column);
}
else
{
abs_column++;
column++;
waddnwstr(text_win, temp, 1);
}
posit++;
temp++;
}
if (column < last_col)
wclrtoeol(text_win);
wmove(text_win, vertical, (horiz - horiz_offset));
}
void
insert_line(disp) /* insert new line */
int disp;
{
int temp_pos;
int temp_pos2;
wchar_t *temp;
wchar_t *extra;
struct text *temp_nod;
text_changes = TRUE;
wmove(text_win, scr_vert, (scr_horz - horiz_offset));
wclrtoeol(text_win);
temp_nod= txtalloc();
temp_nod->line = extra= malloc(10 * sizeof(wchar_t));
temp_nod->line_length = 1;
temp_nod->max_length = 10;
temp_nod->line_number = curr_line->line_number + 1;
temp_nod->next_line = curr_line->next_line;
if (temp_nod->next_line != NULL)
temp_nod->next_line->prev_line = temp_nod;
temp_nod->prev_line = curr_line;
curr_line->next_line = temp_nod;
temp_pos2 = position;
temp = point;
if (temp_pos2 < curr_line->line_length)
{
temp_pos = 1;
while (temp_pos2 < curr_line->line_length)
{
if ((temp_nod->max_length - temp_nod->line_length)< 5)
extra = resiz_line(10, temp_nod, temp_pos);
temp_nod->line_length++;
temp_pos++;
temp_pos2++;
*extra= *temp;
extra++;
temp++;
}
temp=point;
*temp = '\0';
temp = resiz_line((1 - temp_nod->line_length), curr_line, position);
curr_line->line_length = 1 + temp - curr_line->line;
}
curr_line->line_length = position;
curr_line = temp_nod;
*extra = '\0';
position = 1;
point= curr_line->line;
if (disp)
{
if (scr_vert < last_line)
{
scr_vert++;
wclrtoeol(text_win);
wmove(text_win, scr_vert, 0);
winsertln(text_win);
}
else
{
wmove(text_win, 0,0);
wdeleteln(text_win);
wmove(text_win, last_line,0);
wclrtobot(text_win);
}
scr_pos = scr_horz = 0;
if (horiz_offset)
{
horiz_offset = 0;
midscreen(scr_vert, point);
}
draw_line(scr_vert, scr_horz, point, position,
curr_line->line_length);
}
}
struct text *txtalloc() /* allocate space for line structure */
{
return((struct text *) malloc(sizeof( struct text)));
}
wchar_t *next_word(string) /* move to next word in string */
wchar_t *string;
{
while ((*string != '\0') && ((*string != 32) && (*string != 9)))
string++;
while ((*string != '\0') && ((*string == 32) || (*string == 9)))
string++;
return(string);
}
int watoi(wchar_t *s)
{
int x = 0;
while (*s >= '0' && *s <= '9')
x = x * 10 + *s++ - '0';
return x;
}
void
prev_word() /* move to start of previous word in text */
{
if (position != 1)
{
if ((position != 1) && ((point[-1] == ' ') || (point[-1] == '\t')))
{ /* if at the start of a word */
while ((position != 1) && ((*point != ' ') && (*point != '\t')))
left(TRUE);
}