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 enum grep_header_field {
  21         GREP_HEADER_AUTHOR = 0,
  22         GREP_HEADER_COMMITTER,
  23 };
  24
  25 struct grep_pat {
  26         struct grep_pat *next;
  27         const char *origin;
  28         int no;
  29         enum grep_pat_token token;
  30         const char *pattern;
  31         enum grep_header_field field;
  32         regex_t regexp;
  33         unsigned fixed:1;
  34 };
  35
  36 enum grep_expr_node {
  37         GREP_NODE_ATOM,
  38         GREP_NODE_NOT,
  39         GREP_NODE_AND,
  40         GREP_NODE_OR,
  41 };
  42
  43 struct grep_expr {
  44         enum grep_expr_node node;
  45         unsigned hit;
  46         union {
  47                 struct grep_pat *atom;
  48                 struct grep_expr *unary;
  49                 struct {
  50                         struct grep_expr *left;
  51                         struct grep_expr *right;
  52                 } binary;
  53         } u;
  54 };
  55
  56 struct grep_opt {
  57         struct grep_pat *pattern_list;
  58         struct grep_pat **pattern_tail;
  59         struct grep_expr *pattern_expression;
  60         int prefix_length;
  61         regex_t regexp;
  62         unsigned linenum:1;
  63         unsigned invert:1;
  64         unsigned status_only:1;
  65         unsigned name_only:1;
  66         unsigned unmatch_name_only:1;
  67         unsigned count:1;
  68         unsigned word_regexp:1;
  69         unsigned fixed:1;
  70         unsigned all_match:1;
  71 #define GREP_BINARY_DEFAULT     0
  72 #define GREP_BINARY_NOMATCH     1
  73 #define GREP_BINARY_TEXT        2
  74         unsigned binary:2;
  75         unsigned extended:1;
  76         unsigned relative:1;
  77         unsigned pathname:1;
  78         unsigned null_following_name:1;
  79         int regflags;
  80         unsigned pre_context;
  81         unsigned post_context;
  82 };
  83
  84 extern void append_grep_pattern(struct grep_opt *opt, const char *pat, const char *origin, int no, enum grep_pat_token t);
  85 extern void append_header_grep_pattern(struct grep_opt *, enum grep_header_field, const char *);
  86 extern void compile_grep_patterns(struct grep_opt *opt);
  87 extern void free_grep_patterns(struct grep_opt *opt);
  88 extern int grep_buffer(struct grep_opt *opt, const char *name, char *buf, unsigned long size);
  89
  90 #endif