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