main.h

   1 #define LINE_SIZE  1024
   2 #define OFFSET     5
   3 #define CONTINUE   2
   4
   5 #define LENGTH(x) (sizeof(x) / sizeof(*x))
   6 #define CONTROL(char) (char ^ 0x40)
   7 #define MIN(X, Y) (((X) < (Y)) ? (X) : (Y))
   8 #define MAX(X, Y) (((X) > (Y)) ? (X) : (Y))
   9
  10
  11 enum { PREV = 0, NEXT, ANY };
  12
  13
  14 /*
  15  * Options from the command line, to pass to each function that need some
  16  */
  17 typedef struct Opt {
  18         int   line_numbers;
  19         int   print_number;
  20         char  validate_key;
  21         char *separator;
  22         int   lines;
  23         char *prompt;
  24 } Opt;
  25
  26
  27 /*
  28  * Line coming from stdin, wrapped in a header.
  29  */
  30 typedef struct Line {
  31         char *content;               /* sent as output and matched by input */
  32         char *comment;               /* displayed at the right of the content */
  33
  34         int  number;                 /* set here as order will not change */
  35         int  matches;                /* whether it matches buffer's input */
  36         int  header;                 /* whether the line is a header */
  37
  38         struct Line *prev;           /* doubly linked list structure */
  39         struct Line *next;
  40 } Line;
  41
  42
  43 /*
  44  * Buffer containing a doubly linked list of headers
  45  */
  46 typedef struct Buffer {
  47         int total;                   /* total number of line in buffer */
  48         int matching;                /* number lines matching the input */
  49
  50         char    input[LINE_SIZE];    /* string from user's keyboard */
  51         char   *prompt;              /* specified from the command line */
  52
  53         Line   *current;             /* selected line, highlighted */
  54         Line   *first;               /* boundaries of the linked list */
  55         Line   *last;
  56 } Buffer;
  57
  58
  59 /* main */
  60
  61 void     usage(void);
  62
  63
  64 /* buffer */
  65
  66 Buffer * fill_buffer(char *);
  67 void     free_buffer(Buffer *);
  68 void     free_line(Line *);
  69 Line   * add_line(Buffer *, int, char *, char *, Line *);
  70 Line   * parse_line(char *, char *);
  71 Line   * matching_next(Line *);
  72 Line   * matching_prev(Line *);
  73 int      match_line(Line *, char *[], int);
  74 void     filter_lines(Buffer *, int);
  75
  76
  77 /* draw */
  78
  79 void     draw_screen(Buffer *, int, Opt *);
  80 void     draw_clear(int);
  81 void     draw_line(Line *, int, int, Opt *);
  82 void     draw_lines(Buffer *, int, int, Opt *);
  83 void     draw_prompt(Buffer *, int, Opt *);
  84
  85
  86 /* input */
  87
  88 int      input_get(Buffer *, int, Opt *);
  89 int      input_key(FILE *, Buffer *, Opt *);
  90 void     action_jump(Buffer *, int);
  91 void     action_print_selection(Buffer *,int, int);
  92 void     action_remove_word_input(Buffer *);
  93 void     action_add_character(Buffer *, char);
  94
  95
  96 /* util */
  97
  98 void             die(const char *);
  99 struct termios   set_terminal(int);
 100 char           * expand_tabs(char *);