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