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[COLOR_MAXLEN];
 128         char color_selected[COLOR_MAXLEN];
 129         char color_sep[COLOR_MAXLEN];
 130         int regflags;
 131         unsigned pre_context;
 132         unsigned post_context;
 133         unsigned last_shown;
 134         int show_hunk_mark;
 135         int file_break;
 136         int heading;
 137         void *priv;
 138
 139         void (*output)(struct grep_opt *opt, const void *data, size_t size);
 140         void *output_priv;
 141 };
 142
 143 extern void init_grep_defaults(void);
 144 extern int grep_config(const char *var, const char *value, void *);
 145 extern void grep_init(struct grep_opt *, const char *prefix);
 146 void grep_set_pattern_type_option(enum grep_pattern_type, struct grep_opt *opt);
 147 void grep_commit_pattern_type(enum grep_pattern_type, struct grep_opt *opt);
 148
 149 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);
 150 extern void append_grep_pattern(struct grep_opt *opt, const char *pat, const char *origin, int no, enum grep_pat_token t);
 151 extern void append_header_grep_pattern(struct grep_opt *, enum grep_header_field, const char *);
 152 extern void compile_grep_patterns(struct grep_opt *opt);
 153 extern void free_grep_patterns(struct grep_opt *opt);
 154 extern int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size);
 155
 156 struct grep_source {
 157         char *name;
 158
 159         enum grep_source_type {
 160                 GREP_SOURCE_SHA1,
 161                 GREP_SOURCE_FILE,
 162                 GREP_SOURCE_BUF,
 163         } type;
 164         void *identifier;
 165
 166         char *buf;
 167         unsigned long size;
 168
 169         char *path; /* for attribute lookups */
 170         struct userdiff_driver *driver;
 171 };
 172
 173 void grep_source_init(struct grep_source *gs, enum grep_source_type type,
 174                       const char *name, const char *path,
 175                       const void *identifier);
 176 void grep_source_clear_data(struct grep_source *gs);
 177 void grep_source_clear(struct grep_source *gs);
 178 void grep_source_load_driver(struct grep_source *gs);
 179
 180
 181 int grep_source(struct grep_opt *opt, struct grep_source *gs);
 182
 183 extern struct grep_opt *grep_opt_dup(const struct grep_opt *opt);
 184 extern int grep_threads_ok(const struct grep_opt *opt);
 185
 186 #ifndef NO_PTHREADS
 187 /*
 188  * Mutex used around access to the attributes machinery if
 189  * opt->use_threads.  Must be initialized/destroyed by callers!
 190  */
 191 extern int grep_use_locks;
 192 extern pthread_mutex_t grep_attr_mutex;
 193 extern pthread_mutex_t grep_read_mutex;
 194
 195 static inline void grep_read_lock(void)
 196 {
 197         if (grep_use_locks)
 198                 pthread_mutex_lock(&grep_read_mutex);
 199 }
 200
 201 static inline void grep_read_unlock(void)
 202 {
 203         if (grep_use_locks)
 204                 pthread_mutex_unlock(&grep_read_mutex);
 205 }
 206
 207 #else
 208 #define grep_read_lock()
 209 #define grep_read_unlock()
 210 #endif
 211
 212 #endif