commands/mined/mined.h

   1 /*========================================================================*
   2  *                              Mined.h                                   *
   3  *========================================================================*/
   4
   5 #include <minix/config.h>
   6 #include <sys/types.h>
   7 #include <fcntl.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10 #include <limits.h>
  11
  12 #ifndef YMAX
  13 #ifdef UNIX
  14 #include <stdio.h>
  15 #undef putchar
  16 #undef getchar
  17 #undef NULL
  18 #undef EOF
  19 extern char *CE, *VS, *SO, *SE, *CL, *AL, *CM;
  20 #define YMAX            49
  21 #else
  22 #define YMAX            24              /* Maximum y coordinate starting at 0 */
  23 /* Escape sequences. */
  24 extern char *enter_string;      /* String printed on entering mined */
  25 extern char *rev_video;         /* String for starting reverse video */
  26 extern char *normal_video;      /* String for leaving reverse video */
  27 extern char *rev_scroll;        /* String for reverse scrolling */
  28 extern char *pos_string;        /* Absolute cursor positioning */
  29 #define X_PLUS  ' '             /* To be added to x for cursor sequence */
  30 #define Y_PLUS  ' '             /* To be added to y for cursor sequence */
  31 #endif /* UNIX */
  32
  33 #define XMAX            79              /* Maximum x coordinate starting at 0*/
  34 #define SCREENMAX       (YMAX - 1)      /* Number of lines displayed */
  35 #define XBREAK          (XMAX - 0)      /* Line shift at this coordinate */
  36 #define SHIFT_SIZE      25              /* Number of chars to shift */
  37 #define SHIFT_MARK      '!'             /* Char indicating line continues */
  38 #define MAX_CHARS       1024            /* Maximum chars on one line */
  39
  40 /* LINE_START must be rounded up to the lowest SHIFT_SIZE */
  41 #define LINE_START      (((-MAX_CHARS - 1) / SHIFT_SIZE) * SHIFT_SIZE \
  42                                    - SHIFT_SIZE)
  43 #define LINE_END        (MAX_CHARS + 1) /* Highest x-coordinate for line */
  44
  45 #define LINE_LEN        (XMAX + 1)      /* Number of characters on line */
  46 #define SCREEN_SIZE     (XMAX * YMAX)   /* Size of I/O buffering */
  47 #define BLOCK_SIZE      1024
  48
  49 /* Return values of functions */
  50 #define ERRORS          -1
  51 #define NO_LINE         (ERRORS - 1)    /* Must be < 0 */
  52 #define FINE            (ERRORS + 1)
  53 #define NO_INPUT        (ERRORS + 2)
  54
  55 #define STD_OUT         1               /* File descriptor for terminal */
  56
  57 #if (CHIP == INTEL)
  58 #define MEMORY_SIZE     (50 * 1024)     /* Size of data space to malloc */
  59 #endif
  60
  61 #define REPORT  2                       /* Report change of lines on # lines */
  62
  63 typedef int FLAG;
  64
  65 /* General flags */
  66 #define FALSE           0
  67 #define TRUE            1
  68 #define NOT_VALID       2
  69 #define VALID           3
  70 #define OFF             4
  71 #define ON              5
  72
  73 /* Expression flags */
  74 #define FORWARD         6
  75 #define REVERSE         7
  76
  77 /* Yank flags */
  78 #define SMALLER         8
  79 #define BIGGER          9
  80 #define SAME            10
  81 #define EMPTY           11
  82 #define NO_DELETE       12
  83 #define DELETE          13
  84 #define READ            14
  85 #define WRITE           15
  86
  87 /*
  88  * The Line structure.  Each line entry contains a pointer to the next line,
  89  * a pointer to the previous line, a pointer to the text and an unsigned char
  90  * telling at which offset of the line printing should start (usually 0).
  91  */
  92 struct Line {
  93   struct Line *next;
  94   struct Line *prev;
  95   char *text;
  96   unsigned char shift_count;
  97 };
  98
  99 typedef struct Line LINE;
 100
 101 /* Dummy line indicator */
 102 #define DUMMY           0x80
 103 #define DUMMY_MASK      0x7F
 104
 105 /* Expression definitions */
 106 #define NO_MATCH        0
 107 #define MATCH           1
 108 #define REG_ERROR       2
 109
 110 #define BEGIN_LINE      (2 * REG_ERROR)
 111 #define END_LINE        (2 * BEGIN_LINE)
 112
 113 /*
 114  * The regex structure. Status can be any of 0, BEGIN_LINE or REG_ERROR. In
 115  * the last case, the result.err_mess field is assigned. Start_ptr and end_ptr
 116  * point to the match found. For more details see the documentation file.
 117  */
 118 struct regex {
 119   union {
 120         char *err_mess;
 121         int *expression;
 122   } result;
 123   char status;
 124   char *start_ptr;
 125   char *end_ptr;
 126 };
 127
 128 typedef struct regex REGEX;
 129
 130 /* NULL definitions */
 131 #define NIL_PTR         ((char *) 0)
 132 #define NIL_LINE        ((LINE *) 0)
 133 #define NIL_REG         ((REGEX *) 0)
 134 #define NIL_INT         ((int *) 0)
 135
 136 /*
 137  * Forward declarations
 138  */
 139 extern int nlines;              /* Number of lines in file */
 140 extern LINE *header;            /* Head of line list */
 141 extern LINE *tail;              /* Last line in line list */
 142 extern LINE *top_line;          /* First line of screen */
 143 extern LINE *bot_line;          /* Last line of screen */
 144 extern LINE *cur_line;          /* Current line in use */
 145 extern char *cur_text;          /* Pointer to char on current line in use */
 146 extern int last_y;              /* Last y of screen. Usually SCREENMAX */
 147 extern int ymax;
 148 extern int screenmax;
 149 extern char screen[SCREEN_SIZE];/* Output buffer for "writes" and "reads" */
 150
 151 extern int x, y;                        /* x, y coordinates on screen */
 152 extern FLAG modified;                   /* Set when file is modified */
 153 extern FLAG stat_visible;               /* Set if status_line is visible */
 154 extern FLAG writable;                   /* Set if file cannot be written */
 155 extern FLAG quit;                       /* Set when quit character is typed */
 156 extern FLAG rpipe;              /* Set if file should be read from stdin */
 157 extern int input_fd;                    /* Fd for command input */
 158 extern FLAG loading;                    /* Set if we're loading a file */
 159 extern int out_count;                   /* Index in output buffer */
 160 extern char file_name[LINE_LEN];        /* Name of file in use */
 161 extern char text_buffer[MAX_CHARS];     /* Buffer for modifying text */
 162 extern char *blank_line;                /* Clear line to end */
 163
 164 extern char yank_file[];                /* Temp file for buffer */
 165 extern FLAG yank_status;                /* Status of yank_file */
 166 extern long chars_saved;                /* Nr of chars saved in buffer */
 167
 168 /*
 169  * Empty output buffer
 170  */
 171 #define clear_buffer()                  (out_count = 0)
 172
 173 /*
 174  * Print character on terminal
 175  */
 176 #define putchar(c)                      (void) write_char(STD_OUT, (c))
 177
 178 /*
 179  * Ring bell on terminal
 180  */
 181 #define ring_bell()                     putchar('\07')
 182
 183 /*
 184  * Print string on terminal
 185  */
 186 #define string_print(str)               (void) writeline(STD_OUT, (str))
 187
 188 /*
 189  * Flush output buffer
 190  */
 191 #define flush()                         (void) flush_buffer(STD_OUT)
 192
 193 /*
 194  * Convert cnt to nearest tab position
 195  */
 196 #define tab(cnt)                        (((cnt) + 8) & ~07)
 197 #define is_tab(c)                       ((c) == '\t')
 198
 199 /*
 200  * Word defenitions
 201  */
 202 #define white_space(c)  ((c) == ' ' || (c) == '\t')
 203 #define alpha(c)        ((c) != ' ' && (c) != '\t' && (c) != '\n')
 204
 205 /*
 206  * Print line on terminal at offset 0 and clear tail of line
 207  */
 208 #define line_print(line)                put_line(line, 0, TRUE)
 209
 210 /*
 211  * Move to coordinates and set textp. (Don't use address)
 212  */
 213 #define move_to(nx, ny)                 move((nx), NIL_PTR, (ny))
 214
 215 /*
 216  * Move to coordinates on screen as indicated by textp.
 217  */
 218 #define move_address(address)           move(0, (address), y)
 219
 220 /*
 221  * Functions handling status_line. ON means in reverse video.
 222  */
 223 #define status_line(str1, str2) (void) bottom_line(ON, (str1), \
 224                                                     (str2), NIL_PTR, FALSE)
 225 #define error(str1, str2)       (void) bottom_line(ON, (str1), \
 226                                                     (str2), NIL_PTR, FALSE)
 227 #define get_string(str1,str2, fl) bottom_line(ON, (str1), NIL_PTR, (str2), fl)
 228 #define clear_status()          (void) bottom_line(OFF, NIL_PTR, NIL_PTR, \
 229                                                     NIL_PTR, FALSE)
 230
 231 /*
 232  * Print info about current file and buffer.
 233  */
 234 #define fstatus(mess, cnt)      file_status((mess), (cnt), file_name, \
 235                                              nlines, writable, modified)
 236
 237 /*
 238  * Get real shift value.
 239  */
 240 #define get_shift(cnt)          ((cnt) & DUMMY_MASK)
 241
 242 #endif /* YMAX */
 243
 244 /* mined1.c */
 245
 246 _PROTOTYPE(void FS, (void));
 247 _PROTOTYPE(void VI, (void));
 248 _PROTOTYPE(int WT, (void));
 249 _PROTOTYPE(void XWT, (void));
 250 _PROTOTYPE(void SH, (void));
 251 _PROTOTYPE(LINE *proceed, (LINE *line, int count ));
 252 _PROTOTYPE(int bottom_line, (FLAG revfl, char *s1, char *s2, char *inbuf, FLAG statfl ));
 253 _PROTOTYPE(int count_chars, (LINE *line ));
 254 _PROTOTYPE(void move, (int new_x, char *new_address, int new_y ));
 255 _PROTOTYPE(int find_x, (LINE *line, char *address ));
 256 _PROTOTYPE(char *find_address, (LINE *line, int x_coord, int *old_x ));
 257 _PROTOTYPE(int length_of, (char *string ));
 258 _PROTOTYPE(void copy_string, (char *to, char *from ));
 259 _PROTOTYPE(void reset, (LINE *head_line, int screen_y ));
 260 _PROTOTYPE(void set_cursor, (int nx, int ny ));
 261 _PROTOTYPE(void open_device, (void));
 262 _PROTOTYPE(int getchar, (void));
 263 _PROTOTYPE(void display, (int x_coord, int y_coord, LINE *line, int count ));
 264 _PROTOTYPE(int write_char, (int fd, int c ));
 265 _PROTOTYPE(int writeline, (int fd, char *text ));
 266 _PROTOTYPE(void put_line, (LINE *line, int offset, FLAG clear_line ));
 267 _PROTOTYPE(int flush_buffer, (int fd ));
 268 _PROTOTYPE(void bad_write, (int fd ));
 269 _PROTOTYPE(void catch, (int sig ));
 270 _PROTOTYPE(void abort_mined, (void));
 271 _PROTOTYPE(void raw_mode, (FLAG state ));
 272 _PROTOTYPE(void panic, (char *message ));
 273 _PROTOTYPE(char *alloc, (int bytes ));
 274 _PROTOTYPE(void free_space, (char *p ));
 275 /*
 276 #ifdef UNIX
 277 _PROTOTYPE(void (*key_map [128]), (void));
 278 #else
 279 _PROTOTYPE(void (*key_map [256]), (void));
 280 #endif
 281 */
 282 _PROTOTYPE(void initialize, (void));
 283 _PROTOTYPE(char *basename, (char *path ));
 284 _PROTOTYPE(void load_file, (char *file ));
 285 _PROTOTYPE(int get_line, (int fd, char *buffer ));
 286 _PROTOTYPE(LINE *install_line, (char *buffer, int length ));
 287 _PROTOTYPE(void main, (int argc, char *argv []));
 288 _PROTOTYPE(void RD, (void));
 289 _PROTOTYPE(void I, (void));
 290 _PROTOTYPE(void XT, (void));
 291 _PROTOTYPE(void ESC, (void));
 292 _PROTOTYPE(int ask_save, (void));
 293 _PROTOTYPE(int line_number, (void));
 294 _PROTOTYPE(void file_status, (char *message, long count, char *file, int lines,
 295                                                  FLAG writefl, FLAG changed ));
 296 #if __STDC__
 297 void build_string(char *buf, char *fmt, ...);
 298 #else
 299 void build_string();
 300 #endif
 301 _PROTOTYPE(char *num_out, (long number ));
 302 _PROTOTYPE(int get_number, (char *message, int *result ));
 303 _PROTOTYPE(int input, (char *inbuf, FLAG clearfl ));
 304 _PROTOTYPE(int get_file, (char *message, char *file ));
 305 _PROTOTYPE(int _getchar, (void));
 306 _PROTOTYPE(void _flush, (void));
 307 _PROTOTYPE(void _putchar, (int c ));
 308 _PROTOTYPE(void get_term, (void));
 309
 310 /* mined2.c */
 311
 312 _PROTOTYPE(void UP, (void));
 313 _PROTOTYPE(void DN, (void));
 314 _PROTOTYPE(void LF, (void));
 315 _PROTOTYPE(void RT, (void));
 316 _PROTOTYPE(void HIGH, (void));
 317 _PROTOTYPE(void LOW, (void));
 318 _PROTOTYPE(void BL, (void));
 319 _PROTOTYPE(void EL, (void));
 320 _PROTOTYPE(void GOTO, (void));
 321 _PROTOTYPE(void PD, (void));
 322 _PROTOTYPE(void PU, (void));
 323 _PROTOTYPE(void HO, (void));
 324 _PROTOTYPE(void EF, (void));
 325 _PROTOTYPE(void SU, (void));
 326 _PROTOTYPE(void SD, (void));
 327 _PROTOTYPE(int forward_scroll, (void));
 328 _PROTOTYPE(int reverse_scroll, (void));
 329 _PROTOTYPE(void MP, (void));
 330 _PROTOTYPE(void move_previous_word, (FLAG remove ));
 331 _PROTOTYPE(void MN, (void));
 332 _PROTOTYPE(void move_next_word, (FLAG remove ));
 333 _PROTOTYPE(void DCC, (void));
 334 _PROTOTYPE(void DPC, (void));
 335 _PROTOTYPE(void DLN, (void));
 336 _PROTOTYPE(void DNW, (void));
 337 _PROTOTYPE(void DPW, (void));
 338 _PROTOTYPE(void S, (int character ));
 339 _PROTOTYPE(void CTL, (void));
 340 _PROTOTYPE(void LIB, (void));
 341 _PROTOTYPE(LINE *line_insert, (LINE *line, char *string, int len ));
 342 _PROTOTYPE(int insert, (LINE *line, char *location, char *string ));
 343 _PROTOTYPE(LINE *line_delete, (LINE *line ));
 344 _PROTOTYPE(void delete, (LINE *start_line, char *start_textp, LINE *end_line, char *end_textp ));
 345 _PROTOTYPE(void PT, (void));
 346 _PROTOTYPE(void IF, (void));
 347 _PROTOTYPE(void file_insert, (int fd, FLAG old_pos ));
 348 _PROTOTYPE(void WB, (void));
 349 _PROTOTYPE(void MA, (void));
 350 _PROTOTYPE(void YA, (void));
 351 _PROTOTYPE(void DT, (void));
 352 _PROTOTYPE(void set_up, (FLAG remove ));
 353 _PROTOTYPE(FLAG checkmark, (void));
 354 _PROTOTYPE(int legal, (void));
 355 _PROTOTYPE(void yank, (LINE *start_line, char *start_textp, LINE *end_line, char *end_textp, FLAG remove ));
 356 _PROTOTYPE(int scratch_file, (FLAG mode ));
 357 _PROTOTYPE(void SF, (void));
 358 _PROTOTYPE(void SR, (void));
 359 _PROTOTYPE(REGEX *get_expression, (char *message ));
 360 _PROTOTYPE(void GR, (void));
 361 _PROTOTYPE(void LR, (void));
 362 _PROTOTYPE(void change, (char *message, FLAG file ));
 363 _PROTOTYPE(char *substitute, (LINE *line, REGEX *program, char *replacement ));
 364 _PROTOTYPE(void search, (char *message, FLAG method ));
 365 _PROTOTYPE(int find_y, (LINE *match_line ));
 366 _PROTOTYPE(void finished, (REGEX *program, int *last_exp ));
 367 _PROTOTYPE(void compile, (char *pattern, REGEX *program ));
 368 _PROTOTYPE(LINE *match, (REGEX *program, char *string, FLAG method ));
 369 _PROTOTYPE(int line_check, (REGEX *program, char *string, FLAG method ));
 370 _PROTOTYPE(int check_string, (REGEX *program, char *string, int *expression ));
 371 _PROTOTYPE(int star, (REGEX *program, char *end_position, char *string, int *expression ));
 372 _PROTOTYPE(int in_list, (int *list, int c, int list_length, int opcode ));
 373 _PROTOTYPE(void dummy_line, (void));