view_engine.c File Reference

The working part of View. More...

#include <common.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <regex.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>

Include dependency graph for view_engine.c:

Go to the source code of this file.

Macros
#define	get_next_char()
	read the next characater from the virtual file
#define	get_prev_char()
	read the previous characater from the virtual fileThere is no need to track line numbers when moving backwards as they are stored in the line table and accessed as needed. When reading in reverse, the Beginning of Data (BOD) flag is set when the file position is zero, and cleared when the position or reading direction changes. Carriage-returns are ignored as they should be.

Functions
int	a_toi (char *, bool *)
	a safer alternative to atoi() for converting ASCII strings to integers.
void	build_prompt (View *view)
	Build Prompt String.
void	cat_file (View *view)
	Concatenate File to Standard Output.
void	display_line (View *view)
	Display Line on Padparam View *view data structure.
int	display_prompt (View *view, char *s)
	Display Command Line Prompt.
bool	enter_file_spec (Init *init, char *file_spec)
	use form to enter a file specification
int	fmt_line (View *view)
	Format Line for Display.
int	get_cmd_arg (View *view, char *prompt)
	Get Command Argument from User Input.
int	get_cmd_char (View *view, off_t *n)
	Get Command Character and Numeric Argument.
off_t	get_next_line (View *view, off_t pos)
	Get Next Line from View->buf.
off_t	get_pos_next_line (View *view, off_t pos)
	Get Position of Next Line.
off_t	get_pos_prev_line (View *view, off_t pos)
	Get Position of Previous Line.
off_t	get_prev_line (View *view, off_t pos)
	Get Previous Line from View->buf.
void	go_to_eof (View *view)
	Go to End of File.
int	go_to_line (View *view, off_t line_idx)
	Go to Specific Line.
void	go_to_mark (View *view, int c)
	Go to Mark.
void	go_to_percent (View *view, int percent)
	Go to Percent of File.
void	go_to_position (View *view, off_t go_to_pos)
	Go to Specific File Position.
void	increment_ln (View *view)
	Increment Line Index and Update Line Table.
void	initialize_line_table (View *view)
	Initialize Line Table.
void	lp (char *PrintFile)
	Send File to Print Queue.
void	next_page (View *view)
	Advance to Next Page.
int	pad_refresh (View *view)
	Refresh Pad and Line Number Window.
void	parse_ansi_str (char *ansi_str, attr_t *attr, int *cpx)
	Parse ANSI SGR Escape Sequence.
void	prev_page (View *view)
	display previous page
void	remove_file (View *view)
	Remove File.
void	scroll_down_n_lines (View *view, int n)
	Scroll N Lines.
void	scroll_up_n_lines (View *view, int n)
	Scroll Up N Lines.
bool	search (View *view, int *search_cmd, char *regex_pattern)
	Search for Regular Expression Pattern.
void	sync_ln (View *view)
	Synchronize Line Table with Current File Position.
int	view_cmd_processor (Init *init)
	Main Command Processing Loop for View.
void	view_display_help (Init *init)
	Display View Help File.
void	view_display_page (View *view)
	Display Current Page.
int	view_file (Init *init)
	Start view.
void	view_restore_wins ()
	Restore View Windows.
int	write_view_buffer (Init *init, bool f_strip_ansi)
	Write buffer contents to files.

Variables
FILE *	dbgfp
char	err_msg [MAXLEN]
char	prev_regex_pattern [MAXLEN]

Detailed Description

The working part of View.

Author

Bill Waller Copyright (c) 2025 MIT License billx.nosp@m.wall.nosp@m.er@gm.nosp@m.ail..nosp@m.com

Date

2026-02-09

Definition in file view_engine.c.

Variable Documentation

dbgfp

FILE* dbgfp

Definition at line 81 of file view_engine.c.

err_msg

char err_msg[MAXLEN]

Definition at line 117 of file view_engine.c.

prev_regex_pattern

char prev_regex_pattern[MAXLEN]

Definition at line 80 of file view_engine.c.

Referenced by view_cmd_processor().