main.h

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