1  /* Search for patterns in strings or files.
       2     Copyright (C) 2005 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation; either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  #ifndef _LIBGREP_H
      18  #define _LIBGREP_H
      19  
      20  #include <stdbool.h>
      21  #include <stddef.h>
      22  
      23  
      24  #ifdef __cplusplus
      25  extern "C" {
      26  #endif
      27  
      28  
      29  /* A pattern matcher.  */
      30  typedef struct {
      31  
      32    /* Compile a pattern and return the compiled pattern.  */
      33    void * (*compile) (const char *pattern, size_t pattern_size,
      34                       bool match_icase, bool match_words, bool match_lines,
      35                       char eolbyte);
      36  
      37    /* Execute a search.  */
      38    size_t (*execute) (const void *compiled_pattern,
      39                       const char *buf, size_t buf_size,
      40                       size_t *match_size, bool exact);
      41  
      42    /* Free a compiled pattern.  */
      43    void (*free) (void *compiled_pattern);
      44  
      45  } matcher_t;
      46  
      47  /* The built-in pattern matchers.  */
      48  extern matcher_t matcher_grep;   /* POSIX Basic Regular Expressions */
      49  extern matcher_t matcher_egrep;  /* POSIX Extended Regular Expressions */
      50  extern matcher_t matcher_fgrep;  /* Fixed String search */
      51  extern matcher_t matcher_awk;    /* AWK Regular Expressions */
      52  
      53  
      54  #ifdef __cplusplus
      55  }
      56  #endif
      57  
      58  
      59  #endif /* _LIBGREP_H */