grep.h

   1 #ifndef GREP_H
   2 #define GREP_H
   3
   4 enum grep_pat_token {
   5         GREP_PATTERN,
   6         GREP_AND,
   7         GREP_OPEN_PAREN,
   8         GREP_CLOSE_PAREN,
   9         GREP_NOT,
  10         GREP_OR,
  11 };
  12
  13 struct grep_pat {
  14         struct grep_pat *next;
  15         const char *origin;
  16         int no;
  17         enum grep_pat_token token;
  18         const char *pattern;
  19         regex_t regexp;
  20 };
  21
  22 enum grep_expr_node {
  23         GREP_NODE_ATOM,
  24         GREP_NODE_NOT,
  25         GREP_NODE_AND,
  26         GREP_NODE_OR,
  27 };
  28
  29 struct grep_expr {
  30         enum grep_expr_node node;
  31         union {
  32                 struct grep_pat *atom;
  33                 struct grep_expr *unary;
  34                 struct {
  35                         struct grep_expr *left;
  36                         struct grep_expr *right;
  37                 } binary;
  38         } u;
  39 };
  40
  41 struct grep_opt {
  42         struct grep_pat *pattern_list;
  43         struct grep_pat **pattern_tail;
  44         struct grep_expr *pattern_expression;
  45         int prefix_length;
  46         regex_t regexp;
  47         unsigned linenum:1;
  48         unsigned invert:1;
  49         unsigned status_only:1;
  50         unsigned name_only:1;
  51         unsigned unmatch_name_only:1;
  52         unsigned count:1;
  53         unsigned word_regexp:1;
  54         unsigned fixed:1;
  55 #define GREP_BINARY_DEFAULT     0
  56 #define GREP_BINARY_NOMATCH     1
  57 #define GREP_BINARY_TEXT        2
  58         unsigned binary:2;
  59         unsigned extended:1;
  60         unsigned relative:1;
  61         unsigned pathname:1;
  62         int regflags;
  63         unsigned pre_context;
  64         unsigned post_context;
  65 };
  66
  67 extern void append_grep_pattern(struct grep_opt *opt, const char *pat, const char *origin, int no, enum grep_pat_token t);
  68 extern void compile_grep_patterns(struct grep_opt *opt);
  69 extern int grep_buffer(struct grep_opt *opt, const char *name, char *buf, unsigned long size);
  70
  71 #endif