grep.h

   1 #ifndef GREP_H
   2 #define GREP_H
   3
   4 enum grep_pat_token {
   5         GREP_PATTERN,
   6         GREP_PATTERN_HEAD,
   7         GREP_PATTERN_BODY,
   8         GREP_AND,
   9         GREP_OPEN_PAREN,
  10         GREP_CLOSE_PAREN,
  11         GREP_NOT,
  12         GREP_OR,
  13 };
  14
  15 enum grep_context {
  16         GREP_CONTEXT_HEAD,
  17         GREP_CONTEXT_BODY,
  18 };
  19
  20 struct grep_pat {
  21         struct grep_pat *next;
  22         const char *origin;
  23         int no;
  24         enum grep_pat_token token;
  25         const char *pattern;
  26         regex_t regexp;
  27 };
  28
  29 enum grep_expr_node {
  30         GREP_NODE_ATOM,
  31         GREP_NODE_NOT,
  32         GREP_NODE_AND,
  33         GREP_NODE_OR,
  34 };
  35
  36 struct grep_expr {
  37         enum grep_expr_node node;
  38         union {
  39                 struct grep_pat *atom;
  40                 struct grep_expr *unary;
  41                 struct {
  42                         struct grep_expr *left;
  43                         struct grep_expr *right;
  44                 } binary;
  45         } u;
  46 };
  47
  48 struct grep_opt {
  49         struct grep_pat *pattern_list;
  50         struct grep_pat **pattern_tail;
  51         struct grep_expr *pattern_expression;
  52         int prefix_length;
  53         regex_t regexp;
  54         unsigned linenum:1;
  55         unsigned invert:1;
  56         unsigned status_only:1;
  57         unsigned name_only:1;
  58         unsigned unmatch_name_only:1;
  59         unsigned count:1;
  60         unsigned word_regexp:1;
  61         unsigned fixed:1;
  62 #define GREP_BINARY_DEFAULT     0
  63 #define GREP_BINARY_NOMATCH     1
  64 #define GREP_BINARY_TEXT        2
  65         unsigned binary:2;
  66         unsigned extended:1;
  67         unsigned relative:1;
  68         unsigned pathname:1;
  69         int regflags;
  70         unsigned pre_context;
  71         unsigned post_context;
  72 };
  73
  74 extern void append_grep_pattern(struct grep_opt *opt, const char *pat, const char *origin, int no, enum grep_pat_token t);
  75 extern void compile_grep_patterns(struct grep_opt *opt);
  76 extern void free_grep_patterns(struct grep_opt *opt);
  77 extern int grep_buffer(struct grep_opt *opt, const char *name, char *buf, unsigned long size);
  78
  79 #endif