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