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