NCBI C Toolkit Cross Reference

C/regexp/pcreposix.h

  1 /*************************************************
  2 *       Perl-Compatible Regular Expressions      *
  3 *************************************************/
  4 
  5 /* Copyright (c) 1997-2001 University of Cambridge */
  6 
  7 #ifndef _PCREPOSIX_H
  8 #define _PCREPOSIX_H
  9 
 10 /* This is the header for the POSIX wrapper interface to the PCRE Perl-
 11 Compatible Regular Expression library. It defines the things POSIX says should
 12 be there. I hope. */
 13 
 14 /* Have to include stdlib.h in order to ensure that size_t is defined. */
 15 
 16 #include <stdlib.h>
 17 
 18 /* Allow for C++ users */
 19 
 20 #ifdef __cplusplus
 21 extern "C" {
 22 #endif
 23 
 24 /* Options defined by POSIX. */
 25 
 26 #define REG_ICASE     0x01
 27 #define REG_NEWLINE   0x02
 28 #define REG_NOTBOL    0x04
 29 #define REG_NOTEOL    0x08
 30 
 31 /* These are not used by PCRE, but by defining them we make it easier
 32 to slot PCRE into existing programs that make POSIX calls. */
 33 
 34 #define REG_EXTENDED  0
 35 #define REG_NOSUB     0
 36 
 37 /* Error values. Not all these are relevant or used by the wrapper. */
 38 
 39 enum {
 40   REG_ASSERT = 1,  /* internal error ? */
 41   REG_BADBR,       /* invalid repeat counts in {} */
 42   REG_BADPAT,      /* pattern error */
 43   REG_BADRPT,      /* ? * + invalid */
 44   REG_EBRACE,      /* unbalanced {} */
 45   REG_EBRACK,      /* unbalanced [] */
 46   REG_ECOLLATE,    /* collation error - not relevant */
 47   REG_ECTYPE,      /* bad class */
 48   REG_EESCAPE,     /* bad escape sequence */
 49   REG_EMPTY,       /* empty expression */
 50   REG_EPAREN,      /* unbalanced () */
 51   REG_ERANGE,      /* bad range inside [] */
 52   REG_ESIZE,       /* expression too big */
 53   REG_ESPACE,      /* failed to get memory */
 54   REG_ESUBREG,     /* bad back reference */
 55   REG_INVARG,      /* bad argument */
 56   REG_NOMATCH      /* match failed */
 57 };
 58 
 59 
 60 /* The structure representing a compiled regular expression. */
 61 
 62 typedef struct {
 63   void *re_pcre;
 64   size_t re_nsub;
 65   size_t re_erroffset;
 66 } regex_t;
 67 
 68 /* The structure in which a captured offset is returned. */
 69 
 70 typedef int regoff_t;
 71 
 72 typedef struct {
 73   regoff_t rm_so;
 74   regoff_t rm_eo;
 75 } regmatch_t;
 76 
 77 /* The functions */
 78 
 79 extern int    regcomp(regex_t *, const char *, int);
 80 extern int    regexec(regex_t *, const char *, size_t, regmatch_t *, int);
 81 extern size_t regerror(int, const regex_t *, char *, size_t);
 82 extern void   regfree(regex_t *);
 83 
 84 #ifdef __cplusplus
 85 }   /* extern "C" */
 86 #endif
 87 
 88 #endif /* End of pcreposix.h */
 89
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