minix/commands/mined/mined.h
2012-08-06 17:49:22 +02:00

373 lines
10 KiB
C

/*========================================================================*
* Mined.h *
*========================================================================*/
#include <minix/config.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#ifndef YMAX
#ifdef UNIX
#include <stdio.h>
#undef putchar
#undef getchar
#undef NULL
#undef EOF
extern char *CE, *VS, *SO, *SE, *CL, *AL, *CM;
#define YMAX 49
#else
#define YMAX 24 /* Maximum y coordinate starting at 0 */
/* Escape sequences. */
extern char *enter_string; /* String printed on entering mined */
extern char *rev_video; /* String for starting reverse video */
extern char *normal_video; /* String for leaving reverse video */
extern char *rev_scroll; /* String for reverse scrolling */
extern char *pos_string; /* Absolute cursor positioning */
#define X_PLUS ' ' /* To be added to x for cursor sequence */
#define Y_PLUS ' ' /* To be added to y for cursor sequence */
#endif /* UNIX */
#define XMAX 79 /* Maximum x coordinate starting at 0*/
#define SCREENMAX (YMAX - 1) /* Number of lines displayed */
#define XBREAK (XMAX - 0) /* Line shift at this coordinate */
#define SHIFT_SIZE 25 /* Number of chars to shift */
#define SHIFT_MARK '!' /* Char indicating line continues */
#define MAX_CHARS 1024 /* Maximum chars on one line */
/* LINE_START must be rounded up to the lowest SHIFT_SIZE */
#define LINE_START (((-MAX_CHARS - 1) / SHIFT_SIZE) * SHIFT_SIZE \
- SHIFT_SIZE)
#define LINE_END (MAX_CHARS + 1) /* Highest x-coordinate for line */
#define LINE_LEN (XMAX + 1) /* Number of characters on line */
#define SCREEN_SIZE (XMAX * YMAX) /* Size of I/O buffering */
#define BLOCK_SIZE 1024
/* Return values of functions */
#define ERRORS -1
#define NO_LINE (ERRORS - 1) /* Must be < 0 */
#define FINE (ERRORS + 1)
#define NO_INPUT (ERRORS + 2)
#define STD_OUT 1 /* File descriptor for terminal */
#if defined(__i386__)
#define MEMORY_SIZE (50 * 1024) /* Size of data space to malloc */
#endif
#define REPORT 2 /* Report change of lines on # lines */
typedef int FLAG;
/* General flags */
#define FALSE 0
#define TRUE 1
#define NOT_VALID 2
#define VALID 3
#define OFF 4
#define ON 5
/* Expression flags */
#define FORWARD 6
#define REVERSE 7
/* Yank flags */
#define SMALLER 8
#define BIGGER 9
#define SAME 10
#define EMPTY 11
#define NO_DELETE 12
#define DELETE 13
#define READ 14
#define WRITE 15
/*
* The Line structure. Each line entry contains a pointer to the next line,
* a pointer to the previous line, a pointer to the text and an unsigned char
* telling at which offset of the line printing should start (usually 0).
*/
struct Line {
struct Line *next;
struct Line *prev;
char *text;
unsigned char shift_count;
};
typedef struct Line LINE;
/* Dummy line indicator */
#define DUMMY 0x80
#define DUMMY_MASK 0x7F
/* Expression definitions */
#define NO_MATCH 0
#define MATCH 1
#define REG_ERROR 2
#define BEGIN_LINE (2 * REG_ERROR)
#define END_LINE (2 * BEGIN_LINE)
/*
* The regex structure. Status can be any of 0, BEGIN_LINE or REG_ERROR. In
* the last case, the result.err_mess field is assigned. Start_ptr and end_ptr
* point to the match found. For more details see the documentation file.
*/
struct regex {
union {
char *err_mess;
int *expression;
} result;
char status;
char *start_ptr;
char *end_ptr;
};
typedef struct regex REGEX;
/* NULL definitions */
/*
* Forward declarations
*/
extern int nlines; /* Number of lines in file */
extern LINE *header; /* Head of line list */
extern LINE *tail; /* Last line in line list */
extern LINE *top_line; /* First line of screen */
extern LINE *bot_line; /* Last line of screen */
extern LINE *cur_line; /* Current line in use */
extern char *cur_text; /* Pointer to char on current line in use */
extern int last_y; /* Last y of screen. Usually SCREENMAX */
extern int ymax;
extern int screenmax;
extern char screen[SCREEN_SIZE];/* Output buffer for "writes" and "reads" */
extern int x, y; /* x, y coordinates on screen */
extern FLAG modified; /* Set when file is modified */
extern FLAG stat_visible; /* Set if status_line is visible */
extern FLAG writable; /* Set if file cannot be written */
extern FLAG quit; /* Set when quit character is typed */
extern FLAG rpipe; /* Set if file should be read from stdin */
extern int input_fd; /* Fd for command input */
extern FLAG loading; /* Set if we're loading a file */
extern int out_count; /* Index in output buffer */
extern char file_name[LINE_LEN]; /* Name of file in use */
extern char text_buffer[MAX_CHARS]; /* Buffer for modifying text */
extern char *blank_line; /* Clear line to end */
extern char yank_file[]; /* Temp file for buffer */
extern FLAG yank_status; /* Status of yank_file */
extern long chars_saved; /* Nr of chars saved in buffer */
/*
* Empty output buffer
*/
#define clear_buffer() (out_count = 0)
/*
* Print character on terminal
*/
#define putchar(c) (void) write_char(STD_OUT, (c))
/*
* Ring bell on terminal
*/
#define ring_bell() putchar('\07')
/*
* Print string on terminal
*/
#define string_print(str) (void) writeline(STD_OUT, (str))
/*
* Flush output buffer
*/
#define flush() (void) flush_buffer(STD_OUT)
/*
* Convert cnt to nearest tab position
*/
#define tab(cnt) (((cnt) + 8) & ~07)
#define is_tab(c) ((c) == '\t')
/*
* Word defenitions
*/
#define white_space(c) ((c) == ' ' || (c) == '\t')
#define alpha(c) ((c) != ' ' && (c) != '\t' && (c) != '\n')
/*
* Print line on terminal at offset 0 and clear tail of line
*/
#define line_print(line) put_line(line, 0, TRUE)
/*
* Move to coordinates and set textp. (Don't use address)
*/
#define move_to(nx, ny) move((nx), NULL, (ny))
/*
* Move to coordinates on screen as indicated by textp.
*/
#define move_address(address) move(0, (address), y)
/*
* Functions handling status_line. ON means in reverse video.
*/
#define status_line(str1, str2) (void) bottom_line(ON, (str1), \
(str2), NULL, FALSE)
#define error(str1, str2) (void) bottom_line(ON, (str1), \
(str2), NULL, FALSE)
#define get_string(str1,str2, fl) bottom_line(ON, (str1), NULL, (str2), fl)
#define clear_status() (void) bottom_line(OFF, NULL, NULL, \
NULL, FALSE)
/*
* Print info about current file and buffer.
*/
#define fstatus(mess, cnt) file_status((mess), (cnt), file_name, \
nlines, writable, modified)
/*
* Get real shift value.
*/
#define get_shift(cnt) ((cnt) & DUMMY_MASK)
#endif /* YMAX */
/* mined1.c */
void FS(void);
void VI(void);
int WT(void);
void XWT(void);
void SH(void);
LINE *proceed(LINE *line, int count );
int bottom_line(FLAG revfl, char *s1, char *s2, char *inbuf, FLAG statfl
);
int count_chars(LINE *line );
void move(int new_x, char *new_address, int new_y );
int find_x(LINE *line, char *address );
char *find_address(LINE *line, int x_coord, int *old_x );
int length_of(char *string );
void copy_string(char *to, char *from );
void reset(LINE *head_line, int screen_y );
void set_cursor(int nx, int ny );
void open_device(void);
int getchar(void);
void display(int x_coord, int y_coord, LINE *line, int count );
int write_char(int fd, int c );
int writeline(int fd, char *text );
void put_line(LINE *line, int offset, FLAG clear_line );
int flush_buffer(int fd );
void bad_write(int fd );
void catch(int sig );
void abort_mined(void);
void raw_mode(FLAG state );
void panic(char *message );
char *alloc(int bytes );
void free_space(char *p );
/*
#ifdef UNIX
void(*key_map [128]) (void);
#else
void(*key_map [256]) (void);
#endif
*/
void initialize(void);
char *basename(char *path );
void load_file(char *file );
int get_line(int fd, char *buffer );
LINE *install_line(char *buffer, int length );
int main(int argc, char *argv []);
void RD(void);
void I(void);
void XT(void);
void ESC(void);
int ask_save(void);
int line_number(void);
void file_status(char *message, long count, char *file, int lines, FLAG
writefl, FLAG changed );
#if __STDC__
void build_string(char *buf, char *fmt, ...);
#else
void build_string();
#endif
char *num_out(long number );
int get_number(char *message, int *result );
int input(char *inbuf, FLAG clearfl );
int get_file(char *message, char *file );
int _getchar(void);
void _flush(void);
void _putchar(int c );
void get_term(void);
/* mined2.c */
void UP(void);
void DN(void);
void LF(void);
void RT(void);
void HIGH(void);
void LOW(void);
void BL(void);
void EL(void);
void GOTO(void);
void PD(void);
void PU(void);
void HO(void);
void EF(void);
void SU(void);
void SD(void);
int forward_scroll(void);
int reverse_scroll(void);
void MP(void);
void move_previous_word(FLAG remove );
void MN(void);
void move_next_word(FLAG remove );
void DCC(void);
void DPC(void);
void DLN(void);
void DNW(void);
void DPW(void);
void S(int character );
void CTL(void);
void LIB(void);
LINE *line_insert(LINE *line, char *string, int len );
int insert(LINE *line, char *location, char *string );
LINE *line_delete(LINE *line );
void delete(LINE *start_line, char *start_textp, LINE *end_line, char
*end_textp );
void PT(void);
void IF(void);
void file_insert(int fd, FLAG old_pos );
void WB(void);
void MA(void);
void YA(void);
void DT(void);
void set_up(FLAG remove );
FLAG checkmark(void);
int legal(void);
void yank(LINE *start_line, char *start_textp, LINE *end_line, char
*end_textp, FLAG remove );
int scratch_file(FLAG mode );
void SF(void);
void SR(void);
REGEX *get_expression(char *message );
void GR(void);
void LR(void);
void change(char *message, FLAG file );
char *substitute(LINE *line, REGEX *program, char *replacement );
void search(char *message, FLAG method );
int find_y(LINE *match_line );
void finished(REGEX *program, int *last_exp );
void compile(char *pattern, REGEX *program );
LINE *match(REGEX *program, char *string, FLAG method );
int line_check(REGEX *program, char *string, FLAG method );
int check_string(REGEX *program, char *string, int *expression );
int star(REGEX *program, char *end_position, char *string, int
*expression );
int in_list(int *list, int c, int list_length, int opcode );
void dummy_line(void);