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_FIELD_MIN = 0,
  32         GREP_HEADER_AUTHOR = GREP_HEADER_FIELD_MIN,
  33         GREP_HEADER_COMMITTER,
  34         GREP_HEADER_REFLOG,
  35
  36         /* Must be at the end of the enum */
  37         GREP_HEADER_FIELD_MAX
  38 };
  39
  40 struct grep_pat {
  41         struct grep_pat *next;
  42         const char *origin;
  43         int no;
  44         enum grep_pat_token token;
  45         char *pattern;
  46         size_t patternlen;
  47         enum grep_header_field field;
  48         regex_t regexp;
  49         pcre *pcre_regexp;
  50         pcre_extra *pcre_extra_info;
  51         const unsigned char *pcre_tables;
  52         kwset_t kws;
  53         unsigned fixed:1;
  54         unsigned ignore_case:1;
  55         unsigned word_regexp:1;
  56 };
  57
  58 enum grep_expr_node {
  59         GREP_NODE_ATOM,
  60         GREP_NODE_NOT,
  61         GREP_NODE_AND,
  62         GREP_NODE_TRUE,
  63         GREP_NODE_OR
  64 };
  65
  66 enum grep_pattern_type {
  67         GREP_PATTERN_TYPE_UNSPECIFIED = 0,
  68         GREP_PATTERN_TYPE_BRE,
  69         GREP_PATTERN_TYPE_ERE,
  70         GREP_PATTERN_TYPE_FIXED,
  71         GREP_PATTERN_TYPE_PCRE
  72 };
  73
  74 struct grep_expr {
  75         enum grep_expr_node node;
  76         unsigned hit;
  77         union {
  78                 struct grep_pat *atom;
  79                 struct grep_expr *unary;
  80                 struct {
  81                         struct grep_expr *left;
  82                         struct grep_expr *right;
  83                 } binary;
  84         } u;
  85 };
  86
  87 struct grep_opt {
  88         struct grep_pat *pattern_list;
  89         struct grep_pat **pattern_tail;
  90         struct grep_pat *header_list;
  91         struct grep_pat **header_tail;
  92         struct grep_expr *pattern_expression;
  93         const char *prefix;
  94         int prefix_length;
  95         regex_t regexp;
  96         int linenum;
  97         int invert;
  98         int ignore_case;
  99         int status_only;
 100         int name_only;
 101         int unmatch_name_only;
 102         int count;
 103         int word_regexp;
 104         int fixed;
 105         int all_match;
 106         int debug;
 107 #define GREP_BINARY_DEFAULT     0
 108 #define GREP_BINARY_NOMATCH     1
 109 #define GREP_BINARY_TEXT        2
 110         int binary;
 111         int allow_textconv;
 112         int extended;
 113         int use_reflog_filter;
 114         int pcre;
 115         int relative;
 116         int pathname;
 117         int null_following_name;
 118         int color;
 119         int max_depth;
 120         int funcname;
 121         int funcbody;
 122         int extended_regexp_option;
 123         int pattern_type_option;
 124         char color_context[COLOR_MAXLEN];
 125         char color_filename[COLOR_MAXLEN];
 126         char color_function[COLOR_MAXLEN];
 127         char color_lineno[COLOR_MAXLEN];
 128         char color_match_context[COLOR_MAXLEN];
 129         char color_match_selected[COLOR_MAXLEN];
 130         char color_selected[COLOR_MAXLEN];
 131         char color_sep[COLOR_MAXLEN];
 132         int regflags;
 133         unsigned pre_context;
 134         unsigned post_context;
 135         unsigned last_shown;
 136         int show_hunk_mark;
 137         int file_break;
 138         int heading;
 139         void *priv;
 140
 141         void (*output)(struct grep_opt *opt, const void *data, size_t size);
 142         void *output_priv;
 143 };
 144
 145 extern void init_grep_defaults(void);
 146 extern int grep_config(const char *var, const char *value, void *);
 147 extern void grep_init(struct grep_opt *, const char *prefix);
 148 void grep_set_pattern_type_option(enum grep_pattern_type, struct grep_opt *opt);
 149 void grep_commit_pattern_type(enum grep_pattern_type, struct grep_opt *opt);
 150
 151 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);
 152 extern void append_grep_pattern(struct grep_opt *opt, const char *pat, const char *origin, int no, enum grep_pat_token t);
 153 extern void append_header_grep_pattern(struct grep_opt *, enum grep_header_field, const char *);
 154 extern void compile_grep_patterns(struct grep_opt *opt);
 155 extern void free_grep_patterns(struct grep_opt *opt);
 156 extern int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size);
 157
 158 struct grep_source {
 159         char *name;
 160
 161         enum grep_source_type {
 162                 GREP_SOURCE_SHA1,
 163                 GREP_SOURCE_FILE,
 164                 GREP_SOURCE_BUF,
 165         } type;
 166         void *identifier;
 167
 168         char *buf;
 169         unsigned long size;
 170
 171         char *path; /* for attribute lookups */
 172         struct userdiff_driver *driver;
 173 };
 174
 175 void grep_source_init(struct grep_source *gs, enum grep_source_type type,
 176                       const char *name, const char *path,
 177                       const void *identifier);
 178 void grep_source_clear_data(struct grep_source *gs);
 179 void grep_source_clear(struct grep_source *gs);
 180 void grep_source_load_driver(struct grep_source *gs);
 181
 182
 183 int grep_source(struct grep_opt *opt, struct grep_source *gs);
 184
 185 extern struct grep_opt *grep_opt_dup(const struct grep_opt *opt);
 186 extern int grep_threads_ok(const struct grep_opt *opt);
 187
 188 #ifndef NO_PTHREADS
 189 /*
 190  * Mutex used around access to the attributes machinery if
 191  * opt->use_threads.  Must be initialized/destroyed by callers!
 192  */
 193 extern int grep_use_locks;
 194 extern pthread_mutex_t grep_attr_mutex;
 195 extern pthread_mutex_t grep_read_mutex;
 196
 197 static inline void grep_read_lock(void)
 198 {
 199         if (grep_use_locks)
 200                 pthread_mutex_lock(&grep_read_mutex);
 201 }
 202
 203 static inline void grep_read_unlock(void)
 204 {
 205         if (grep_use_locks)
 206                 pthread_mutex_unlock(&grep_read_mutex);
 207 }
 208
 209 #else
 210 #define grep_read_lock()
 211 #define grep_read_unlock()
 212 #endif
 213
 214 #endif