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