grep.h

   1 #ifndef GREP_H
   2 #define GREP_H
   3 #include "color.h"
   4 #ifdef USE_LIBPCRE
   5 #include <pcre.h>
   6 #else
   7 typedef int pcre;
   8 typedef int pcre_extra;
   9 #endif
  10 #include "kwset.h"
  11 #include "thread-utils.h"
  12 #include "userdiff.h"
  13
  14 enum grep_pat_token {
  15         GREP_PATTERN,
  16         GREP_PATTERN_HEAD,
  17         GREP_PATTERN_BODY,
  18         GREP_AND,
  19         GREP_OPEN_PAREN,
  20         GREP_CLOSE_PAREN,
  21         GREP_NOT,
  22         GREP_OR
  23 };
  24
  25 enum grep_context {
  26         GREP_CONTEXT_HEAD,
  27         GREP_CONTEXT_BODY
  28 };
  29
  30 enum grep_header_field {
  31         GREP_HEADER_AUTHOR = 0,
  32         GREP_HEADER_COMMITTER
  33 };
  34 #define GREP_HEADER_FIELD_MAX (GREP_HEADER_COMMITTER + 1)
  35
  36 struct grep_pat {
  37         struct grep_pat *next;
  38         const char *origin;
  39         int no;
  40         enum grep_pat_token token;
  41         char *pattern;
  42         size_t patternlen;
  43         enum grep_header_field field;
  44         regex_t regexp;
  45         pcre *pcre_regexp;
  46         pcre_extra *pcre_extra_info;
  47         kwset_t kws;
  48         unsigned fixed:1;
  49         unsigned ignore_case:1;
  50         unsigned word_regexp:1;
  51 };
  52
  53 enum grep_expr_node {
  54         GREP_NODE_ATOM,
  55         GREP_NODE_NOT,
  56         GREP_NODE_AND,
  57         GREP_NODE_TRUE,
  58         GREP_NODE_OR
  59 };
  60
  61 struct grep_expr {
  62         enum grep_expr_node node;
  63         unsigned hit;
  64         union {
  65                 struct grep_pat *atom;
  66                 struct grep_expr *unary;
  67                 struct {
  68                         struct grep_expr *left;
  69                         struct grep_expr *right;
  70                 } binary;
  71         } u;
  72 };
  73
  74 struct grep_opt {
  75         struct grep_pat *pattern_list;
  76         struct grep_pat **pattern_tail;
  77         struct grep_pat *header_list;
  78         struct grep_pat **header_tail;
  79         struct grep_expr *pattern_expression;
  80         const char *prefix;
  81         int prefix_length;
  82         regex_t regexp;
  83         int linenum;
  84         int invert;
  85         int ignore_case;
  86         int status_only;
  87         int name_only;
  88         int unmatch_name_only;
  89         int count;
  90         int word_regexp;
  91         int fixed;
  92         int all_match;
  93 #define GREP_BINARY_DEFAULT     0
  94 #define GREP_BINARY_NOMATCH     1
  95 #define GREP_BINARY_TEXT        2
  96         int binary;
  97         int extended;
  98         int pcre;
  99         int relative;
 100         int pathname;
 101         int null_following_name;
 102         int color;
 103         int max_depth;
 104         int funcname;
 105         int funcbody;
 106         char color_context[COLOR_MAXLEN];
 107         char color_filename[COLOR_MAXLEN];
 108         char color_function[COLOR_MAXLEN];
 109         char color_lineno[COLOR_MAXLEN];
 110         char color_match[COLOR_MAXLEN];
 111         char color_selected[COLOR_MAXLEN];
 112         char color_sep[COLOR_MAXLEN];
 113         int regflags;
 114         unsigned pre_context;
 115         unsigned post_context;
 116         unsigned last_shown;
 117         int show_hunk_mark;
 118         int file_break;
 119         int heading;
 120         void *priv;
 121
 122         void (*output)(struct grep_opt *opt, const void *data, size_t size);
 123         void *output_priv;
 124 };
 125
 126 extern void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, const char *origin, int no, enum grep_pat_token t);
 127 extern void append_grep_pattern(struct grep_opt *opt, const char *pat, const char *origin, int no, enum grep_pat_token t);
 128 extern void append_header_grep_pattern(struct grep_opt *, enum grep_header_field, const char *);
 129 extern void compile_grep_patterns(struct grep_opt *opt);
 130 extern void free_grep_patterns(struct grep_opt *opt);
 131 extern int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size);
 132
 133 struct grep_source {
 134         char *name;
 135
 136         enum grep_source_type {
 137                 GREP_SOURCE_SHA1,
 138                 GREP_SOURCE_FILE,
 139                 GREP_SOURCE_BUF,
 140         } type;
 141         void *identifier;
 142
 143         char *buf;
 144         unsigned long size;
 145
 146         struct userdiff_driver *driver;
 147 };
 148
 149 void grep_source_init(struct grep_source *gs, enum grep_source_type type,
 150                       const char *name, const void *identifier);
 151 int grep_source_load(struct grep_source *gs);
 152 void grep_source_clear_data(struct grep_source *gs);
 153 void grep_source_clear(struct grep_source *gs);
 154 void grep_source_load_driver(struct grep_source *gs);
 155 int grep_source_is_binary(struct grep_source *gs);
 156
 157 int grep_source(struct grep_opt *opt, struct grep_source *gs);
 158
 159 extern struct grep_opt *grep_opt_dup(const struct grep_opt *opt);
 160 extern int grep_threads_ok(const struct grep_opt *opt);
 161
 162 #ifndef NO_PTHREADS
 163 /*
 164  * Mutex used around access to the attributes machinery if
 165  * opt->use_threads.  Must be initialized/destroyed by callers!
 166  */
 167 extern int grep_use_locks;
 168 extern pthread_mutex_t grep_attr_mutex;
 169 extern pthread_mutex_t grep_read_mutex;
 170
 171 static inline void grep_read_lock(void)
 172 {
 173         if (grep_use_locks)
 174                 pthread_mutex_lock(&grep_read_mutex);
 175 }
 176
 177 static inline void grep_read_unlock(void)
 178 {
 179         if (grep_use_locks)
 180                 pthread_mutex_unlock(&grep_read_mutex);
 181 }
 182
 183 #else
 184 #define grep_read_lock()
 185 #define grep_read_unlock()
 186 #endif
 187
 188 #endif