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- /*
- * -*- mode: c-mode; c-file-style: python -*-
- */
-
- #ifndef Py_REGEXPR_H
- #define Py_REGEXPR_H
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /*
- * regexpr.h
- *
- * Author: Tatu Ylonen <ylo@ngs.fi>
- *
- * Copyright (c) 1991 Tatu Ylonen, Espoo, Finland
- *
- * Permission to use, copy, modify, distribute, and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies. This
- * software is provided "as is" without express or implied warranty.
- *
- * Created: Thu Sep 26 17:15:36 1991 ylo
- * Last modified: Mon Nov 4 15:49:46 1991 ylo
- */
-
- /* $Id: regexpr.h,v 1.12 1997/09/03 00:47:36 guido Exp $ */
-
- #ifndef REGEXPR_H
- #define REGEXPR_H
-
- #define RE_NREGS 100 /* number of registers available */
-
- typedef struct re_pattern_buffer
- {
- unsigned char *buffer; /* compiled pattern */
- int allocated; /* allocated size of compiled pattern */
- int used; /* actual length of compiled pattern */
- unsigned char *fastmap; /* fastmap[ch] is true if ch can start pattern */
- unsigned char *translate; /* translation to apply during compilation/matching */
- unsigned char fastmap_accurate; /* true if fastmap is valid */
- unsigned char can_be_null; /* true if can match empty string */
- unsigned char uses_registers; /* registers are used and need to be initialized */
- int num_registers; /* number of registers used */
- unsigned char anchor; /* anchor: 0=none 1=begline 2=begbuf */
- } *regexp_t;
-
- typedef struct re_registers
- {
- int start[RE_NREGS]; /* start offset of region */
- int end[RE_NREGS]; /* end offset of region */
- } *regexp_registers_t;
-
- /* bit definitions for syntax */
- #define RE_NO_BK_PARENS 1 /* no quoting for parentheses */
- #define RE_NO_BK_VBAR 2 /* no quoting for vertical bar */
- #define RE_BK_PLUS_QM 4 /* quoting needed for + and ? */
- #define RE_TIGHT_VBAR 8 /* | binds tighter than ^ and $ */
- #define RE_NEWLINE_OR 16 /* treat newline as or */
- #define RE_CONTEXT_INDEP_OPS 32 /* ^$?*+ are special in all contexts */
- #define RE_ANSI_HEX 64 /* ansi sequences (\n etc) and \xhh */
- #define RE_NO_GNU_EXTENSIONS 128 /* no gnu extensions */
-
- /* definitions for some common regexp styles */
- #define RE_SYNTAX_AWK (RE_NO_BK_PARENS|RE_NO_BK_VBAR|RE_CONTEXT_INDEP_OPS)
- #define RE_SYNTAX_EGREP (RE_SYNTAX_AWK|RE_NEWLINE_OR)
- #define RE_SYNTAX_GREP (RE_BK_PLUS_QM|RE_NEWLINE_OR)
- #define RE_SYNTAX_EMACS 0
-
- #define Sword 1
- #define Swhitespace 2
- #define Sdigit 4
- #define Soctaldigit 8
- #define Shexdigit 16
-
- /* Rename all exported symbols to avoid conflicts with similarly named
- symbols in some systems' standard C libraries... */
-
- #define re_syntax _Py_re_syntax
- #define re_syntax_table _Py_re_syntax_table
- #define re_compile_initialize _Py_re_compile_initialize
- #define re_set_syntax _Py_re_set_syntax
- #define re_compile_pattern _Py_re_compile_pattern
- #define re_match _Py_re_match
- #define re_search _Py_re_search
- #define re_compile_fastmap _Py_re_compile_fastmap
- #define re_comp _Py_re_comp
- #define re_exec _Py_re_exec
-
- #ifdef HAVE_PROTOTYPES
-
- extern int re_syntax;
- /* This is the actual syntax mask. It was added so that Python could do
- * syntax-dependent munging of patterns before compilation. */
-
- extern unsigned char re_syntax_table[256];
-
- void re_compile_initialize(void);
-
- int re_set_syntax(int syntax);
- /* This sets the syntax to use and returns the previous syntax. The
- * syntax is specified by a bit mask of the above defined bits. */
-
- char *re_compile_pattern(unsigned char *regex, int regex_size, regexp_t compiled);
- /* This compiles the regexp (given in regex and length in regex_size).
- * This returns NULL if the regexp compiled successfully, and an error
- * message if an error was encountered. The buffer field must be
- * initialized to a memory area allocated by malloc (or to NULL) before
- * use, and the allocated field must be set to its length (or 0 if
- * buffer is NULL). Also, the translate field must be set to point to a
- * valid translation table, or NULL if it is not used. */
-
- int re_match(regexp_t compiled, unsigned char *string, int size, int pos,
- regexp_registers_t old_regs);
- /* This tries to match the regexp against the string. This returns the
- * length of the matched portion, or -1 if the pattern could not be
- * matched and -2 if an error (such as failure stack overflow) is
- * encountered. */
-
- int re_search(regexp_t compiled, unsigned char *string, int size, int startpos,
- int range, regexp_registers_t regs);
- /* This rearches for a substring matching the regexp. This returns the
- * first index at which a match is found. range specifies at how many
- * positions to try matching; positive values indicate searching
- * forwards, and negative values indicate searching backwards. mstop
- * specifies the offset beyond which a match must not go. This returns
- * -1 if no match is found, and -2 if an error (such as failure stack
- * overflow) is encountered. */
-
- void re_compile_fastmap(regexp_t compiled);
- /* This computes the fastmap for the regexp. For this to have any effect,
- * the calling program must have initialized the fastmap field to point
- * to an array of 256 characters. */
-
- #else /* HAVE_PROTOTYPES */
-
- extern int re_syntax;
- extern unsigned char re_syntax_table[256];
- void re_compile_initialize();
- int re_set_syntax();
- char *re_compile_pattern();
- int re_match();
- int re_search();
- void re_compile_fastmap();
-
- #endif /* HAVE_PROTOTYPES */
-
- #endif /* REGEXPR_H */
-
-
-
- #ifdef __cplusplus
- }
- #endif
- #endif /* !Py_REGEXPR_H */
-