main.h

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