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