370 lines
12 KiB
C
370 lines
12 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 (CHIP == INTEL)
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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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_PROTOTYPE(void FS, (void));
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_PROTOTYPE(void VI, (void));
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_PROTOTYPE(int WT, (void));
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_PROTOTYPE(void XWT, (void));
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_PROTOTYPE(void SH, (void));
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_PROTOTYPE(LINE *proceed, (LINE *line, int count ));
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_PROTOTYPE(int bottom_line, (FLAG revfl, char *s1, char *s2, char *inbuf, FLAG statfl ));
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_PROTOTYPE(int count_chars, (LINE *line ));
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_PROTOTYPE(void move, (int new_x, char *new_address, int new_y ));
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_PROTOTYPE(int find_x, (LINE *line, char *address ));
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_PROTOTYPE(char *find_address, (LINE *line, int x_coord, int *old_x ));
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_PROTOTYPE(int length_of, (char *string ));
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_PROTOTYPE(void copy_string, (char *to, char *from ));
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_PROTOTYPE(void reset, (LINE *head_line, int screen_y ));
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_PROTOTYPE(void set_cursor, (int nx, int ny ));
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_PROTOTYPE(void open_device, (void));
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_PROTOTYPE(int getchar, (void));
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_PROTOTYPE(void display, (int x_coord, int y_coord, LINE *line, int count ));
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_PROTOTYPE(int write_char, (int fd, int c ));
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_PROTOTYPE(int writeline, (int fd, char *text ));
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_PROTOTYPE(void put_line, (LINE *line, int offset, FLAG clear_line ));
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_PROTOTYPE(int flush_buffer, (int fd ));
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_PROTOTYPE(void bad_write, (int fd ));
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_PROTOTYPE(void catch, (int sig ));
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_PROTOTYPE(void abort_mined, (void));
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_PROTOTYPE(void raw_mode, (FLAG state ));
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_PROTOTYPE(void panic, (char *message ));
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_PROTOTYPE(char *alloc, (int bytes ));
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_PROTOTYPE(void free_space, (char *p ));
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/*
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#ifdef UNIX
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_PROTOTYPE(void (*key_map [128]), (void));
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#else
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_PROTOTYPE(void (*key_map [256]), (void));
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#endif
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*/
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_PROTOTYPE(void initialize, (void));
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_PROTOTYPE(char *basename, (char *path ));
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_PROTOTYPE(void load_file, (char *file ));
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_PROTOTYPE(int get_line, (int fd, char *buffer ));
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_PROTOTYPE(LINE *install_line, (char *buffer, int length ));
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_PROTOTYPE(int main, (int argc, char *argv []));
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_PROTOTYPE(void RD, (void));
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_PROTOTYPE(void I, (void));
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_PROTOTYPE(void XT, (void));
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_PROTOTYPE(void ESC, (void));
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_PROTOTYPE(int ask_save, (void));
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_PROTOTYPE(int line_number, (void));
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_PROTOTYPE(void file_status, (char *message, long count, char *file, int lines,
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FLAG 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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_PROTOTYPE(char *num_out, (long number ));
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_PROTOTYPE(int get_number, (char *message, int *result ));
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_PROTOTYPE(int input, (char *inbuf, FLAG clearfl ));
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_PROTOTYPE(int get_file, (char *message, char *file ));
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_PROTOTYPE(int _getchar, (void));
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_PROTOTYPE(void _flush, (void));
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_PROTOTYPE(void _putchar, (int c ));
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_PROTOTYPE(void get_term, (void));
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/* mined2.c */
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_PROTOTYPE(void UP, (void));
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_PROTOTYPE(void DN, (void));
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_PROTOTYPE(void LF, (void));
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_PROTOTYPE(void RT, (void));
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_PROTOTYPE(void HIGH, (void));
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_PROTOTYPE(void LOW, (void));
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_PROTOTYPE(void BL, (void));
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_PROTOTYPE(void EL, (void));
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_PROTOTYPE(void GOTO, (void));
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_PROTOTYPE(void PD, (void));
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_PROTOTYPE(void PU, (void));
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_PROTOTYPE(void HO, (void));
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_PROTOTYPE(void EF, (void));
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_PROTOTYPE(void SU, (void));
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_PROTOTYPE(void SD, (void));
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_PROTOTYPE(int forward_scroll, (void));
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_PROTOTYPE(int reverse_scroll, (void));
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_PROTOTYPE(void MP, (void));
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_PROTOTYPE(void move_previous_word, (FLAG remove ));
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_PROTOTYPE(void MN, (void));
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_PROTOTYPE(void move_next_word, (FLAG remove ));
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_PROTOTYPE(void DCC, (void));
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_PROTOTYPE(void DPC, (void));
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_PROTOTYPE(void DLN, (void));
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_PROTOTYPE(void DNW, (void));
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_PROTOTYPE(void DPW, (void));
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_PROTOTYPE(void S, (int character ));
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_PROTOTYPE(void CTL, (void));
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_PROTOTYPE(void LIB, (void));
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_PROTOTYPE(LINE *line_insert, (LINE *line, char *string, int len ));
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_PROTOTYPE(int insert, (LINE *line, char *location, char *string ));
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_PROTOTYPE(LINE *line_delete, (LINE *line ));
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_PROTOTYPE(void delete, (LINE *start_line, char *start_textp, LINE *end_line, char *end_textp ));
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_PROTOTYPE(void PT, (void));
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_PROTOTYPE(void IF, (void));
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_PROTOTYPE(void file_insert, (int fd, FLAG old_pos ));
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_PROTOTYPE(void WB, (void));
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_PROTOTYPE(void MA, (void));
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_PROTOTYPE(void YA, (void));
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_PROTOTYPE(void DT, (void));
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_PROTOTYPE(void set_up, (FLAG remove ));
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_PROTOTYPE(FLAG checkmark, (void));
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_PROTOTYPE(int legal, (void));
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_PROTOTYPE(void yank, (LINE *start_line, char *start_textp, LINE *end_line, char *end_textp, FLAG remove ));
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_PROTOTYPE(int scratch_file, (FLAG mode ));
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_PROTOTYPE(void SF, (void));
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_PROTOTYPE(void SR, (void));
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_PROTOTYPE(REGEX *get_expression, (char *message ));
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_PROTOTYPE(void GR, (void));
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_PROTOTYPE(void LR, (void));
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_PROTOTYPE(void change, (char *message, FLAG file ));
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_PROTOTYPE(char *substitute, (LINE *line, REGEX *program, char *replacement ));
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_PROTOTYPE(void search, (char *message, FLAG method ));
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_PROTOTYPE(int find_y, (LINE *match_line ));
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_PROTOTYPE(void finished, (REGEX *program, int *last_exp ));
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_PROTOTYPE(void compile, (char *pattern, REGEX *program ));
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_PROTOTYPE(LINE *match, (REGEX *program, char *string, FLAG method ));
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_PROTOTYPE(int line_check, (REGEX *program, char *string, FLAG method ));
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_PROTOTYPE(int check_string, (REGEX *program, char *string, int *expression ));
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_PROTOTYPE(int star, (REGEX *program, char *end_position, char *string, int *expression ));
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_PROTOTYPE(int in_list, (int *list, int c, int list_length, int opcode ));
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_PROTOTYPE(void dummy_line, (void));
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