kconfig: Lindent scripts/lxdialog
The lxdialog code was not easy to read. So as first step the code
was run through Lindent.
Fix-ups will come in next patchset.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/lxdialog/textbox.c b/scripts/lxdialog/textbox.c
index ed23df2..d6e7f2a 100644
--- a/scripts/lxdialog/textbox.c
+++ b/scripts/lxdialog/textbox.c
@@ -21,11 +21,11 @@
#include "dialog.h"
-static void back_lines (int n);
-static void print_page (WINDOW * win, int height, int width);
-static void print_line (WINDOW * win, int row, int width);
-static char *get_line (void);
-static void print_position (WINDOW * win, int height, int width);
+static void back_lines(int n);
+static void print_page(WINDOW * win, int height, int width);
+static void print_line(WINDOW * win, int row, int width);
+static char *get_line(void);
+static void print_position(WINDOW * win, int height, int width);
static int hscroll, fd, file_size, bytes_read;
static int begin_reached = 1, end_reached, page_length;
@@ -34,450 +34,466 @@
/*
* Display text from a file in a dialog box.
*/
-int
-dialog_textbox (const char *title, const char *file, int height, int width)
+int dialog_textbox(const char *title, const char *file, int height, int width)
{
- int i, x, y, cur_x, cur_y, fpos, key = 0;
- int passed_end;
- char search_term[MAX_LEN + 1];
- WINDOW *dialog, *text;
+ int i, x, y, cur_x, cur_y, fpos, key = 0;
+ int passed_end;
+ char search_term[MAX_LEN + 1];
+ WINDOW *dialog, *text;
- search_term[0] = '\0'; /* no search term entered yet */
+ search_term[0] = '\0'; /* no search term entered yet */
- /* Open input file for reading */
- if ((fd = open (file, O_RDONLY)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nCan't open input file in dialog_textbox().\n");
- exit (-1);
- }
- /* Get file size. Actually, 'file_size' is the real file size - 1,
- since it's only the last byte offset from the beginning */
- if ((file_size = lseek (fd, 0, SEEK_END)) == -1) {
- endwin ();
- fprintf (stderr, "\nError getting file size in dialog_textbox().\n");
- exit (-1);
- }
- /* Restore file pointer to beginning of file after getting file size */
- if (lseek (fd, 0, SEEK_SET) == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer in dialog_textbox().\n");
- exit (-1);
- }
- /* Allocate space for read buffer */
- if ((buf = malloc (BUF_SIZE + 1)) == NULL) {
- endwin ();
- fprintf (stderr, "\nCan't allocate memory in dialog_textbox().\n");
- exit (-1);
- }
- if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
- endwin ();
- fprintf (stderr, "\nError reading file in dialog_textbox().\n");
- exit (-1);
- }
- buf[bytes_read] = '\0'; /* mark end of valid data */
- page = buf; /* page is pointer to start of page to be displayed */
-
- /* center dialog box on screen */
- x = (COLS - width) / 2;
- y = (LINES - height) / 2;
-
-
- draw_shadow (stdscr, y, x, height, width);
-
- dialog = newwin (height, width, y, x);
- keypad (dialog, TRUE);
-
- /* Create window for text region, used for scrolling text */
- text = subwin (dialog, height - 4, width - 2, y + 1, x + 1);
- wattrset (text, dialog_attr);
- wbkgdset (text, dialog_attr & A_COLOR);
-
- keypad (text, TRUE);
-
- /* register the new window, along with its borders */
- draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
-
- wattrset (dialog, border_attr);
- mvwaddch (dialog, height-3, 0, ACS_LTEE);
- for (i = 0; i < width - 2; i++)
- waddch (dialog, ACS_HLINE);
- wattrset (dialog, dialog_attr);
- wbkgdset (dialog, dialog_attr & A_COLOR);
- waddch (dialog, ACS_RTEE);
-
- if (title != NULL && strlen(title) >= width-2 ) {
- /* truncate long title -- mec */
- char * title2 = malloc(width-2+1);
- memcpy( title2, title, width-2 );
- title2[width-2] = '\0';
- title = title2;
- }
-
- if (title != NULL) {
- wattrset (dialog, title_attr);
- mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
- waddstr (dialog, (char *)title);
- waddch (dialog, ' ');
- }
- print_button (dialog, " Exit ", height - 2, width / 2 - 4, TRUE);
- wnoutrefresh (dialog);
- getyx (dialog, cur_y, cur_x); /* Save cursor position */
-
- /* Print first page of text */
- attr_clear (text, height - 4, width - 2, dialog_attr);
- print_page (text, height - 4, width - 2);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh (dialog);
-
- while ((key != ESC) && (key != '\n')) {
- key = wgetch (dialog);
- switch (key) {
- case 'E': /* Exit */
- case 'e':
- case 'X':
- case 'x':
- delwin (dialog);
- free (buf);
- close (fd);
- return 0;
- case 'g': /* First page */
- case KEY_HOME:
- if (!begin_reached) {
- begin_reached = 1;
- /* First page not in buffer? */
- if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError moving file pointer in dialog_textbox().\n");
- exit (-1);
- }
- if (fpos > bytes_read) { /* Yes, we have to read it in */
- if (lseek (fd, 0, SEEK_SET) == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer in "
- "dialog_textbox().\n");
- exit (-1);
- }
- if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError reading file in dialog_textbox().\n");
- exit (-1);
- }
- buf[bytes_read] = '\0';
- }
- page = buf;
- print_page (text, height - 4, width - 2);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh (dialog);
- }
- break;
- case 'G': /* Last page */
- case KEY_END:
-
- end_reached = 1;
- /* Last page not in buffer? */
- if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError moving file pointer in dialog_textbox().\n");
- exit (-1);
- }
- if (fpos < file_size) { /* Yes, we have to read it in */
- if (lseek (fd, -BUF_SIZE, SEEK_END) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError moving file pointer in dialog_textbox().\n");
- exit (-1);
- }
- if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError reading file in dialog_textbox().\n");
- exit (-1);
- }
- buf[bytes_read] = '\0';
- }
- page = buf + bytes_read;
- back_lines (height - 4);
- print_page (text, height - 4, width - 2);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh (dialog);
- break;
- case 'K': /* Previous line */
- case 'k':
- case KEY_UP:
- if (!begin_reached) {
- back_lines (page_length + 1);
-
- /* We don't call print_page() here but use scrolling to ensure
- faster screen update. However, 'end_reached' and
- 'page_length' should still be updated, and 'page' should
- point to start of next page. This is done by calling
- get_line() in the following 'for' loop. */
- scrollok (text, TRUE);
- wscrl (text, -1); /* Scroll text region down one line */
- scrollok (text, FALSE);
- page_length = 0;
- passed_end = 0;
- for (i = 0; i < height - 4; i++) {
- if (!i) {
- /* print first line of page */
- print_line (text, 0, width - 2);
- wnoutrefresh (text);
- } else
- /* Called to update 'end_reached' and 'page' */
- get_line ();
- if (!passed_end)
- page_length++;
- if (end_reached && !passed_end)
- passed_end = 1;
- }
-
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh (dialog);
- }
- break;
- case 'B': /* Previous page */
- case 'b':
- case KEY_PPAGE:
- if (begin_reached)
- break;
- back_lines (page_length + height - 4);
- print_page (text, height - 4, width - 2);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x);
- wrefresh (dialog);
- break;
- case 'J': /* Next line */
- case 'j':
- case KEY_DOWN:
- if (!end_reached) {
- begin_reached = 0;
- scrollok (text, TRUE);
- scroll (text); /* Scroll text region up one line */
- scrollok (text, FALSE);
- print_line (text, height - 5, width - 2);
- wnoutrefresh (text);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh (dialog);
- }
- break;
- case KEY_NPAGE: /* Next page */
- case ' ':
- if (end_reached)
- break;
-
- begin_reached = 0;
- print_page (text, height - 4, width - 2);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x);
- wrefresh (dialog);
- break;
- case '0': /* Beginning of line */
- case 'H': /* Scroll left */
- case 'h':
- case KEY_LEFT:
- if (hscroll <= 0)
- break;
-
- if (key == '0')
- hscroll = 0;
- else
- hscroll--;
- /* Reprint current page to scroll horizontally */
- back_lines (page_length);
- print_page (text, height - 4, width - 2);
- wmove (dialog, cur_y, cur_x);
- wrefresh (dialog);
- break;
- case 'L': /* Scroll right */
- case 'l':
- case KEY_RIGHT:
- if (hscroll >= MAX_LEN)
- break;
- hscroll++;
- /* Reprint current page to scroll horizontally */
- back_lines (page_length);
- print_page (text, height - 4, width - 2);
- wmove (dialog, cur_y, cur_x);
- wrefresh (dialog);
- break;
- case ESC:
- break;
+ /* Open input file for reading */
+ if ((fd = open(file, O_RDONLY)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nCan't open input file in dialog_textbox().\n");
+ exit(-1);
}
- }
+ /* Get file size. Actually, 'file_size' is the real file size - 1,
+ since it's only the last byte offset from the beginning */
+ if ((file_size = lseek(fd, 0, SEEK_END)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError getting file size in dialog_textbox().\n");
+ exit(-1);
+ }
+ /* Restore file pointer to beginning of file after getting file size */
+ if (lseek(fd, 0, SEEK_SET) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in dialog_textbox().\n");
+ exit(-1);
+ }
+ /* Allocate space for read buffer */
+ if ((buf = malloc(BUF_SIZE + 1)) == NULL) {
+ endwin();
+ fprintf(stderr,
+ "\nCan't allocate memory in dialog_textbox().\n");
+ exit(-1);
+ }
+ if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
+ endwin();
+ fprintf(stderr, "\nError reading file in dialog_textbox().\n");
+ exit(-1);
+ }
+ buf[bytes_read] = '\0'; /* mark end of valid data */
+ page = buf; /* page is pointer to start of page to be displayed */
- delwin (dialog);
- free (buf);
- close (fd);
- return -1; /* ESC pressed */
+ /* center dialog box on screen */
+ x = (COLS - width) / 2;
+ y = (LINES - height) / 2;
+
+ draw_shadow(stdscr, y, x, height, width);
+
+ dialog = newwin(height, width, y, x);
+ keypad(dialog, TRUE);
+
+ /* Create window for text region, used for scrolling text */
+ text = subwin(dialog, height - 4, width - 2, y + 1, x + 1);
+ wattrset(text, dialog_attr);
+ wbkgdset(text, dialog_attr & A_COLOR);
+
+ keypad(text, TRUE);
+
+ /* register the new window, along with its borders */
+ draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
+
+ wattrset(dialog, border_attr);
+ mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+ for (i = 0; i < width - 2; i++)
+ waddch(dialog, ACS_HLINE);
+ wattrset(dialog, dialog_attr);
+ wbkgdset(dialog, dialog_attr & A_COLOR);
+ waddch(dialog, ACS_RTEE);
+
+ if (title != NULL && strlen(title) >= width - 2) {
+ /* truncate long title -- mec */
+ char *title2 = malloc(width - 2 + 1);
+ memcpy(title2, title, width - 2);
+ title2[width - 2] = '\0';
+ title = title2;
+ }
+
+ if (title != NULL) {
+ wattrset(dialog, title_attr);
+ mvwaddch(dialog, 0, (width - strlen(title)) / 2 - 1, ' ');
+ waddstr(dialog, (char *)title);
+ waddch(dialog, ' ');
+ }
+ print_button(dialog, " Exit ", height - 2, width / 2 - 4, TRUE);
+ wnoutrefresh(dialog);
+ getyx(dialog, cur_y, cur_x); /* Save cursor position */
+
+ /* Print first page of text */
+ attr_clear(text, height - 4, width - 2, dialog_attr);
+ print_page(text, height - 4, width - 2);
+ print_position(dialog, height, width);
+ wmove(dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh(dialog);
+
+ while ((key != ESC) && (key != '\n')) {
+ key = wgetch(dialog);
+ switch (key) {
+ case 'E': /* Exit */
+ case 'e':
+ case 'X':
+ case 'x':
+ delwin(dialog);
+ free(buf);
+ close(fd);
+ return 0;
+ case 'g': /* First page */
+ case KEY_HOME:
+ if (!begin_reached) {
+ begin_reached = 1;
+ /* First page not in buffer? */
+ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in dialog_textbox().\n");
+ exit(-1);
+ }
+ if (fpos > bytes_read) { /* Yes, we have to read it in */
+ if (lseek(fd, 0, SEEK_SET) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in "
+ "dialog_textbox().\n");
+ exit(-1);
+ }
+ if ((bytes_read =
+ read(fd, buf, BUF_SIZE)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError reading file in dialog_textbox().\n");
+ exit(-1);
+ }
+ buf[bytes_read] = '\0';
+ }
+ page = buf;
+ print_page(text, height - 4, width - 2);
+ print_position(dialog, height, width);
+ wmove(dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh(dialog);
+ }
+ break;
+ case 'G': /* Last page */
+ case KEY_END:
+
+ end_reached = 1;
+ /* Last page not in buffer? */
+ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in dialog_textbox().\n");
+ exit(-1);
+ }
+ if (fpos < file_size) { /* Yes, we have to read it in */
+ if (lseek(fd, -BUF_SIZE, SEEK_END) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in dialog_textbox().\n");
+ exit(-1);
+ }
+ if ((bytes_read =
+ read(fd, buf, BUF_SIZE)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError reading file in dialog_textbox().\n");
+ exit(-1);
+ }
+ buf[bytes_read] = '\0';
+ }
+ page = buf + bytes_read;
+ back_lines(height - 4);
+ print_page(text, height - 4, width - 2);
+ print_position(dialog, height, width);
+ wmove(dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh(dialog);
+ break;
+ case 'K': /* Previous line */
+ case 'k':
+ case KEY_UP:
+ if (!begin_reached) {
+ back_lines(page_length + 1);
+
+ /* We don't call print_page() here but use scrolling to ensure
+ faster screen update. However, 'end_reached' and
+ 'page_length' should still be updated, and 'page' should
+ point to start of next page. This is done by calling
+ get_line() in the following 'for' loop. */
+ scrollok(text, TRUE);
+ wscrl(text, -1); /* Scroll text region down one line */
+ scrollok(text, FALSE);
+ page_length = 0;
+ passed_end = 0;
+ for (i = 0; i < height - 4; i++) {
+ if (!i) {
+ /* print first line of page */
+ print_line(text, 0, width - 2);
+ wnoutrefresh(text);
+ } else
+ /* Called to update 'end_reached' and 'page' */
+ get_line();
+ if (!passed_end)
+ page_length++;
+ if (end_reached && !passed_end)
+ passed_end = 1;
+ }
+
+ print_position(dialog, height, width);
+ wmove(dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh(dialog);
+ }
+ break;
+ case 'B': /* Previous page */
+ case 'b':
+ case KEY_PPAGE:
+ if (begin_reached)
+ break;
+ back_lines(page_length + height - 4);
+ print_page(text, height - 4, width - 2);
+ print_position(dialog, height, width);
+ wmove(dialog, cur_y, cur_x);
+ wrefresh(dialog);
+ break;
+ case 'J': /* Next line */
+ case 'j':
+ case KEY_DOWN:
+ if (!end_reached) {
+ begin_reached = 0;
+ scrollok(text, TRUE);
+ scroll(text); /* Scroll text region up one line */
+ scrollok(text, FALSE);
+ print_line(text, height - 5, width - 2);
+ wnoutrefresh(text);
+ print_position(dialog, height, width);
+ wmove(dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh(dialog);
+ }
+ break;
+ case KEY_NPAGE: /* Next page */
+ case ' ':
+ if (end_reached)
+ break;
+
+ begin_reached = 0;
+ print_page(text, height - 4, width - 2);
+ print_position(dialog, height, width);
+ wmove(dialog, cur_y, cur_x);
+ wrefresh(dialog);
+ break;
+ case '0': /* Beginning of line */
+ case 'H': /* Scroll left */
+ case 'h':
+ case KEY_LEFT:
+ if (hscroll <= 0)
+ break;
+
+ if (key == '0')
+ hscroll = 0;
+ else
+ hscroll--;
+ /* Reprint current page to scroll horizontally */
+ back_lines(page_length);
+ print_page(text, height - 4, width - 2);
+ wmove(dialog, cur_y, cur_x);
+ wrefresh(dialog);
+ break;
+ case 'L': /* Scroll right */
+ case 'l':
+ case KEY_RIGHT:
+ if (hscroll >= MAX_LEN)
+ break;
+ hscroll++;
+ /* Reprint current page to scroll horizontally */
+ back_lines(page_length);
+ print_page(text, height - 4, width - 2);
+ wmove(dialog, cur_y, cur_x);
+ wrefresh(dialog);
+ break;
+ case ESC:
+ break;
+ }
+ }
+
+ delwin(dialog);
+ free(buf);
+ close(fd);
+ return -1; /* ESC pressed */
}
/*
* Go back 'n' lines in text file. Called by dialog_textbox().
* 'page' will be updated to point to the desired line in 'buf'.
*/
-static void
-back_lines (int n)
+static void back_lines(int n)
{
- int i, fpos;
+ int i, fpos;
- begin_reached = 0;
- /* We have to distinguish between end_reached and !end_reached
- since at end of file, the line is not ended by a '\n'.
- The code inside 'if' basically does a '--page' to move one
- character backward so as to skip '\n' of the previous line */
- if (!end_reached) {
- /* Either beginning of buffer or beginning of file reached? */
- if (page == buf) {
- if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer in "
- "back_lines().\n");
- exit (-1);
- }
- if (fpos > bytes_read) { /* Not beginning of file yet */
- /* We've reached beginning of buffer, but not beginning of
- file yet, so read previous part of file into buffer.
- Note that we only move backward for BUF_SIZE/2 bytes,
- but not BUF_SIZE bytes to avoid re-reading again in
- print_page() later */
- /* Really possible to move backward BUF_SIZE/2 bytes? */
- if (fpos < BUF_SIZE / 2 + bytes_read) {
- /* No, move less then */
- if (lseek (fd, 0, SEEK_SET) == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer in "
- "back_lines().\n");
- exit (-1);
- }
- page = buf + fpos - bytes_read;
- } else { /* Move backward BUF_SIZE/2 bytes */
- if (lseek (fd, -(BUF_SIZE / 2 + bytes_read), SEEK_CUR)
- == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer "
- "in back_lines().\n");
- exit (-1);
- }
- page = buf + BUF_SIZE / 2;
- }
- if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
- endwin ();
- fprintf (stderr, "\nError reading file in back_lines().\n");
- exit (-1);
- }
- buf[bytes_read] = '\0';
- } else { /* Beginning of file reached */
- begin_reached = 1;
- return;
- }
- }
- if (*(--page) != '\n') { /* '--page' here */
- /* Something's wrong... */
- endwin ();
- fprintf (stderr, "\nInternal error in back_lines().\n");
- exit (-1);
- }
- }
- /* Go back 'n' lines */
- for (i = 0; i < n; i++)
- do {
- if (page == buf) {
- if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError moving file pointer in back_lines().\n");
- exit (-1);
- }
- if (fpos > bytes_read) {
- /* Really possible to move backward BUF_SIZE/2 bytes? */
- if (fpos < BUF_SIZE / 2 + bytes_read) {
- /* No, move less then */
- if (lseek (fd, 0, SEEK_SET) == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer "
- "in back_lines().\n");
- exit (-1);
+ begin_reached = 0;
+ /* We have to distinguish between end_reached and !end_reached
+ since at end of file, the line is not ended by a '\n'.
+ The code inside 'if' basically does a '--page' to move one
+ character backward so as to skip '\n' of the previous line */
+ if (!end_reached) {
+ /* Either beginning of buffer or beginning of file reached? */
+ if (page == buf) {
+ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in "
+ "back_lines().\n");
+ exit(-1);
}
- page = buf + fpos - bytes_read;
- } else { /* Move backward BUF_SIZE/2 bytes */
- if (lseek (fd, -(BUF_SIZE / 2 + bytes_read),
- SEEK_CUR) == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer"
- " in back_lines().\n");
- exit (-1);
+ if (fpos > bytes_read) { /* Not beginning of file yet */
+ /* We've reached beginning of buffer, but not beginning of
+ file yet, so read previous part of file into buffer.
+ Note that we only move backward for BUF_SIZE/2 bytes,
+ but not BUF_SIZE bytes to avoid re-reading again in
+ print_page() later */
+ /* Really possible to move backward BUF_SIZE/2 bytes? */
+ if (fpos < BUF_SIZE / 2 + bytes_read) {
+ /* No, move less then */
+ if (lseek(fd, 0, SEEK_SET) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in "
+ "back_lines().\n");
+ exit(-1);
+ }
+ page = buf + fpos - bytes_read;
+ } else { /* Move backward BUF_SIZE/2 bytes */
+ if (lseek
+ (fd, -(BUF_SIZE / 2 + bytes_read),
+ SEEK_CUR)
+ == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer "
+ "in back_lines().\n");
+ exit(-1);
+ }
+ page = buf + BUF_SIZE / 2;
+ }
+ if ((bytes_read =
+ read(fd, buf, BUF_SIZE)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError reading file in back_lines().\n");
+ exit(-1);
+ }
+ buf[bytes_read] = '\0';
+ } else { /* Beginning of file reached */
+ begin_reached = 1;
+ return;
}
- page = buf + BUF_SIZE / 2;
- }
- if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
- endwin ();
- fprintf (stderr, "\nError reading file in "
- "back_lines().\n");
- exit (-1);
- }
- buf[bytes_read] = '\0';
- } else { /* Beginning of file reached */
- begin_reached = 1;
- return;
}
- }
- } while (*(--page) != '\n');
- page++;
+ if (*(--page) != '\n') { /* '--page' here */
+ /* Something's wrong... */
+ endwin();
+ fprintf(stderr, "\nInternal error in back_lines().\n");
+ exit(-1);
+ }
+ }
+ /* Go back 'n' lines */
+ for (i = 0; i < n; i++)
+ do {
+ if (page == buf) {
+ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in back_lines().\n");
+ exit(-1);
+ }
+ if (fpos > bytes_read) {
+ /* Really possible to move backward BUF_SIZE/2 bytes? */
+ if (fpos < BUF_SIZE / 2 + bytes_read) {
+ /* No, move less then */
+ if (lseek(fd, 0, SEEK_SET) ==
+ -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer "
+ "in back_lines().\n");
+ exit(-1);
+ }
+ page = buf + fpos - bytes_read;
+ } else { /* Move backward BUF_SIZE/2 bytes */
+ if (lseek
+ (fd,
+ -(BUF_SIZE / 2 +
+ bytes_read),
+ SEEK_CUR) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer"
+ " in back_lines().\n");
+ exit(-1);
+ }
+ page = buf + BUF_SIZE / 2;
+ }
+ if ((bytes_read =
+ read(fd, buf, BUF_SIZE)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError reading file in "
+ "back_lines().\n");
+ exit(-1);
+ }
+ buf[bytes_read] = '\0';
+ } else { /* Beginning of file reached */
+ begin_reached = 1;
+ return;
+ }
+ }
+ } while (*(--page) != '\n');
+ page++;
}
/*
* Print a new page of text. Called by dialog_textbox().
*/
-static void
-print_page (WINDOW * win, int height, int width)
+static void print_page(WINDOW * win, int height, int width)
{
- int i, passed_end = 0;
+ int i, passed_end = 0;
- page_length = 0;
- for (i = 0; i < height; i++) {
- print_line (win, i, width);
- if (!passed_end)
- page_length++;
- if (end_reached && !passed_end)
- passed_end = 1;
- }
- wnoutrefresh (win);
+ page_length = 0;
+ for (i = 0; i < height; i++) {
+ print_line(win, i, width);
+ if (!passed_end)
+ page_length++;
+ if (end_reached && !passed_end)
+ passed_end = 1;
+ }
+ wnoutrefresh(win);
}
/*
* Print a new line of text. Called by dialog_textbox() and print_page().
*/
-static void
-print_line (WINDOW * win, int row, int width)
+static void print_line(WINDOW * win, int row, int width)
{
- int y, x;
- char *line;
+ int y, x;
+ char *line;
- line = get_line ();
- line += MIN (strlen (line), hscroll); /* Scroll horizontally */
- wmove (win, row, 0); /* move cursor to correct line */
- waddch (win, ' ');
- waddnstr (win, line, MIN (strlen (line), width - 2));
+ line = get_line();
+ line += MIN(strlen(line), hscroll); /* Scroll horizontally */
+ wmove(win, row, 0); /* move cursor to correct line */
+ waddch(win, ' ');
+ waddnstr(win, line, MIN(strlen(line), width - 2));
- getyx (win, y, x);
- /* Clear 'residue' of previous line */
+ getyx(win, y, x);
+ /* Clear 'residue' of previous line */
#if OLD_NCURSES
- {
- int i;
- for (i = 0; i < width - x; i++)
- waddch (win, ' ');
- }
+ {
+ int i;
+ for (i = 0; i < width - x; i++)
+ waddch(win, ' ');
+ }
#else
- wclrtoeol(win);
+ wclrtoeol(win);
#endif
}
@@ -486,71 +502,73 @@
* 'page' should point to start of current line before calling, and will be
* updated to point to start of next line.
*/
-static char *
-get_line (void)
+static char *get_line(void)
{
- int i = 0, fpos;
- static char line[MAX_LEN + 1];
+ int i = 0, fpos;
+ static char line[MAX_LEN + 1];
- end_reached = 0;
- while (*page != '\n') {
- if (*page == '\0') {
- /* Either end of file or end of buffer reached */
- if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer in "
- "get_line().\n");
- exit (-1);
- }
- if (fpos < file_size) { /* Not end of file yet */
- /* We've reached end of buffer, but not end of file yet,
- so read next part of file into buffer */
- if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
- endwin ();
- fprintf (stderr, "\nError reading file in get_line().\n");
- exit (-1);
+ end_reached = 0;
+ while (*page != '\n') {
+ if (*page == '\0') {
+ /* Either end of file or end of buffer reached */
+ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in "
+ "get_line().\n");
+ exit(-1);
+ }
+ if (fpos < file_size) { /* Not end of file yet */
+ /* We've reached end of buffer, but not end of file yet,
+ so read next part of file into buffer */
+ if ((bytes_read =
+ read(fd, buf, BUF_SIZE)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError reading file in get_line().\n");
+ exit(-1);
+ }
+ buf[bytes_read] = '\0';
+ page = buf;
+ } else {
+ if (!end_reached)
+ end_reached = 1;
+ break;
+ }
+ } else if (i < MAX_LEN)
+ line[i++] = *(page++);
+ else {
+ /* Truncate lines longer than MAX_LEN characters */
+ if (i == MAX_LEN)
+ line[i++] = '\0';
+ page++;
}
- buf[bytes_read] = '\0';
- page = buf;
- } else {
- if (!end_reached)
- end_reached = 1;
- break;
- }
- } else if (i < MAX_LEN)
- line[i++] = *(page++);
- else {
- /* Truncate lines longer than MAX_LEN characters */
- if (i == MAX_LEN)
- line[i++] = '\0';
- page++;
}
- }
- if (i <= MAX_LEN)
- line[i] = '\0';
- if (!end_reached)
- page++; /* move pass '\n' */
+ if (i <= MAX_LEN)
+ line[i] = '\0';
+ if (!end_reached)
+ page++; /* move pass '\n' */
- return line;
+ return line;
}
/*
* Print current position
*/
-static void
-print_position (WINDOW * win, int height, int width)
+static void print_position(WINDOW * win, int height, int width)
{
- int fpos, percent;
+ int fpos, percent;
- if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer in print_position().\n");
- exit (-1);
- }
- wattrset (win, position_indicator_attr);
- wbkgdset (win, position_indicator_attr & A_COLOR);
- percent = !file_size ?
- 100 : ((fpos - bytes_read + page - buf) * 100) / file_size;
- wmove (win, height - 3, width - 9);
- wprintw (win, "(%3d%%)", percent);
+ if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
+ endwin();
+ fprintf(stderr,
+ "\nError moving file pointer in print_position().\n");
+ exit(-1);
+ }
+ wattrset(win, position_indicator_attr);
+ wbkgdset(win, position_indicator_attr & A_COLOR);
+ percent = !file_size ?
+ 100 : ((fpos - bytes_read + page - buf) * 100) / file_size;
+ wmove(win, height - 3, width - 9);
+ wprintw(win, "(%3d%%)", percent);
}
