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authorSergei Golubchik <serg@mariadb.org>2019-12-18 17:51:01 +0100
committerSergei Golubchik <serg@mariadb.org>2019-12-21 10:35:07 +0100
commit67f928d8c243c57f11ddfc8cd4217d5e55fb2c5f (patch)
tree3cdda793ef3087e7243ea0de7af476484af007f6 /pcre/doc/pcre32.3
parent3b654d54c1081ae9eab54bebe7093704749d31cf (diff)
downloadmariadb-git-67f928d8c243c57f11ddfc8cd4217d5e55fb2c5f.tar.gz
remove pcre, add support for bundled pcre2
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-.TH PCRE 3 "12 May 2013" "PCRE 8.33"
-.SH NAME
-PCRE - Perl-compatible regular expressions
-.sp
-.B #include <pcre.h>
-.
-.
-.SH "PCRE 32-BIT API BASIC FUNCTIONS"
-.rs
-.sp
-.nf
-.B pcre32 *pcre32_compile(PCRE_SPTR32 \fIpattern\fP, int \fIoptions\fP,
-.B " const char **\fIerrptr\fP, int *\fIerroffset\fP,"
-.B " const unsigned char *\fItableptr\fP);"
-.sp
-.B pcre32 *pcre32_compile2(PCRE_SPTR32 \fIpattern\fP, int \fIoptions\fP,
-.B " int *\fIerrorcodeptr\fP,"
-.B " const unsigned char *\fItableptr\fP);"
-.sp
-.B pcre32_extra *pcre32_study(const pcre32 *\fIcode\fP, int \fIoptions\fP,
-.B " const char **\fIerrptr\fP);"
-.sp
-.B void pcre32_free_study(pcre32_extra *\fIextra\fP);
-.sp
-.B int pcre32_exec(const pcre32 *\fIcode\fP, "const pcre32_extra *\fIextra\fP,"
-.B " PCRE_SPTR32 \fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP,"
-.B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP);"
-.sp
-.B int pcre32_dfa_exec(const pcre32 *\fIcode\fP, "const pcre32_extra *\fIextra\fP,"
-.B " PCRE_SPTR32 \fIsubject\fP, int \fIlength\fP, int \fIstartoffset\fP,"
-.B " int \fIoptions\fP, int *\fIovector\fP, int \fIovecsize\fP,"
-.B " int *\fIworkspace\fP, int \fIwscount\fP);"
-.fi
-.
-.
-.SH "PCRE 32-BIT API STRING EXTRACTION FUNCTIONS"
-.rs
-.sp
-.nf
-.B int pcre32_copy_named_substring(const pcre32 *\fIcode\fP,
-.B " PCRE_SPTR32 \fIsubject\fP, int *\fIovector\fP,"
-.B " int \fIstringcount\fP, PCRE_SPTR32 \fIstringname\fP,"
-.B " PCRE_UCHAR32 *\fIbuffer\fP, int \fIbuffersize\fP);"
-.sp
-.B int pcre32_copy_substring(PCRE_SPTR32 \fIsubject\fP, int *\fIovector\fP,
-.B " int \fIstringcount\fP, int \fIstringnumber\fP, PCRE_UCHAR32 *\fIbuffer\fP,"
-.B " int \fIbuffersize\fP);"
-.sp
-.B int pcre32_get_named_substring(const pcre32 *\fIcode\fP,
-.B " PCRE_SPTR32 \fIsubject\fP, int *\fIovector\fP,"
-.B " int \fIstringcount\fP, PCRE_SPTR32 \fIstringname\fP,"
-.B " PCRE_SPTR32 *\fIstringptr\fP);"
-.sp
-.B int pcre32_get_stringnumber(const pcre32 *\fIcode\fP,
-.B " PCRE_SPTR32 \fIname\fP);"
-.sp
-.B int pcre32_get_stringtable_entries(const pcre32 *\fIcode\fP,
-.B " PCRE_SPTR32 \fIname\fP, PCRE_UCHAR32 **\fIfirst\fP, PCRE_UCHAR32 **\fIlast\fP);"
-.sp
-.B int pcre32_get_substring(PCRE_SPTR32 \fIsubject\fP, int *\fIovector\fP,
-.B " int \fIstringcount\fP, int \fIstringnumber\fP,"
-.B " PCRE_SPTR32 *\fIstringptr\fP);"
-.sp
-.B int pcre32_get_substring_list(PCRE_SPTR32 \fIsubject\fP,
-.B " int *\fIovector\fP, int \fIstringcount\fP, PCRE_SPTR32 **\fIlistptr\fP);"
-.sp
-.B void pcre32_free_substring(PCRE_SPTR32 \fIstringptr\fP);
-.sp
-.B void pcre32_free_substring_list(PCRE_SPTR32 *\fIstringptr\fP);
-.fi
-.
-.
-.SH "PCRE 32-BIT API AUXILIARY FUNCTIONS"
-.rs
-.sp
-.nf
-.B pcre32_jit_stack *pcre32_jit_stack_alloc(int \fIstartsize\fP, int \fImaxsize\fP);
-.sp
-.B void pcre32_jit_stack_free(pcre32_jit_stack *\fIstack\fP);
-.sp
-.B void pcre32_assign_jit_stack(pcre32_extra *\fIextra\fP,
-.B " pcre32_jit_callback \fIcallback\fP, void *\fIdata\fP);"
-.sp
-.B const unsigned char *pcre32_maketables(void);
-.sp
-.B int pcre32_fullinfo(const pcre32 *\fIcode\fP, "const pcre32_extra *\fIextra\fP,"
-.B " int \fIwhat\fP, void *\fIwhere\fP);"
-.sp
-.B int pcre32_refcount(pcre32 *\fIcode\fP, int \fIadjust\fP);
-.sp
-.B int pcre32_config(int \fIwhat\fP, void *\fIwhere\fP);
-.sp
-.B const char *pcre32_version(void);
-.sp
-.B int pcre32_pattern_to_host_byte_order(pcre32 *\fIcode\fP,
-.B " pcre32_extra *\fIextra\fP, const unsigned char *\fItables\fP);"
-.fi
-.
-.
-.SH "PCRE 32-BIT API INDIRECTED FUNCTIONS"
-.rs
-.sp
-.nf
-.B void *(*pcre32_malloc)(size_t);
-.sp
-.B void (*pcre32_free)(void *);
-.sp
-.B void *(*pcre32_stack_malloc)(size_t);
-.sp
-.B void (*pcre32_stack_free)(void *);
-.sp
-.B int (*pcre32_callout)(pcre32_callout_block *);
-.fi
-.
-.
-.SH "PCRE 32-BIT API 32-BIT-ONLY FUNCTION"
-.rs
-.sp
-.nf
-.B int pcre32_utf32_to_host_byte_order(PCRE_UCHAR32 *\fIoutput\fP,
-.B " PCRE_SPTR32 \fIinput\fP, int \fIlength\fP, int *\fIbyte_order\fP,"
-.B " int \fIkeep_boms\fP);"
-.fi
-.
-.
-.SH "THE PCRE 32-BIT LIBRARY"
-.rs
-.sp
-Starting with release 8.32, it is possible to compile a PCRE library that
-supports 32-bit character strings, including UTF-32 strings, as well as or
-instead of the original 8-bit library. This work was done by Christian Persch,
-based on the work done by Zoltan Herczeg for the 16-bit library. All three
-libraries contain identical sets of functions, used in exactly the same way.
-Only the names of the functions and the data types of their arguments and
-results are different. To avoid over-complication and reduce the documentation
-maintenance load, most of the PCRE documentation describes the 8-bit library,
-with only occasional references to the 16-bit and 32-bit libraries. This page
-describes what is different when you use the 32-bit library.
-.P
-WARNING: A single application can be linked with all or any of the three
-libraries, but you must take care when processing any particular pattern
-to use functions from just one library. For example, if you want to study
-a pattern that was compiled with \fBpcre32_compile()\fP, you must do so
-with \fBpcre32_study()\fP, not \fBpcre_study()\fP, and you must free the
-study data with \fBpcre32_free_study()\fP.
-.
-.
-.SH "THE HEADER FILE"
-.rs
-.sp
-There is only one header file, \fBpcre.h\fP. It contains prototypes for all the
-functions in all libraries, as well as definitions of flags, structures, error
-codes, etc.
-.
-.
-.SH "THE LIBRARY NAME"
-.rs
-.sp
-In Unix-like systems, the 32-bit library is called \fBlibpcre32\fP, and can
-normally be accesss by adding \fB-lpcre32\fP to the command for linking an
-application that uses PCRE.
-.
-.
-.SH "STRING TYPES"
-.rs
-.sp
-In the 8-bit library, strings are passed to PCRE library functions as vectors
-of bytes with the C type "char *". In the 32-bit library, strings are passed as
-vectors of unsigned 32-bit quantities. The macro PCRE_UCHAR32 specifies an
-appropriate data type, and PCRE_SPTR32 is defined as "const PCRE_UCHAR32 *". In
-very many environments, "unsigned int" is a 32-bit data type. When PCRE is
-built, it defines PCRE_UCHAR32 as "unsigned int", but checks that it really is
-a 32-bit data type. If it is not, the build fails with an error message telling
-the maintainer to modify the definition appropriately.
-.
-.
-.SH "STRUCTURE TYPES"
-.rs
-.sp
-The types of the opaque structures that are used for compiled 32-bit patterns
-and JIT stacks are \fBpcre32\fP and \fBpcre32_jit_stack\fP respectively. The
-type of the user-accessible structure that is returned by \fBpcre32_study()\fP
-is \fBpcre32_extra\fP, and the type of the structure that is used for passing
-data to a callout function is \fBpcre32_callout_block\fP. These structures
-contain the same fields, with the same names, as their 8-bit counterparts. The
-only difference is that pointers to character strings are 32-bit instead of
-8-bit types.
-.
-.
-.SH "32-BIT FUNCTIONS"
-.rs
-.sp
-For every function in the 8-bit library there is a corresponding function in
-the 32-bit library with a name that starts with \fBpcre32_\fP instead of
-\fBpcre_\fP. The prototypes are listed above. In addition, there is one extra
-function, \fBpcre32_utf32_to_host_byte_order()\fP. This is a utility function
-that converts a UTF-32 character string to host byte order if necessary. The
-other 32-bit functions expect the strings they are passed to be in host byte
-order.
-.P
-The \fIinput\fP and \fIoutput\fP arguments of
-\fBpcre32_utf32_to_host_byte_order()\fP may point to the same address, that is,
-conversion in place is supported. The output buffer must be at least as long as
-the input.
-.P
-The \fIlength\fP argument specifies the number of 32-bit data units in the
-input string; a negative value specifies a zero-terminated string.
-.P
-If \fIbyte_order\fP is NULL, it is assumed that the string starts off in host
-byte order. This may be changed by byte-order marks (BOMs) anywhere in the
-string (commonly as the first character).
-.P
-If \fIbyte_order\fP is not NULL, a non-zero value of the integer to which it
-points means that the input starts off in host byte order, otherwise the
-opposite order is assumed. Again, BOMs in the string can change this. The final
-byte order is passed back at the end of processing.
-.P
-If \fIkeep_boms\fP is not zero, byte-order mark characters (0xfeff) are copied
-into the output string. Otherwise they are discarded.
-.P
-The result of the function is the number of 32-bit units placed into the output
-buffer, including the zero terminator if the string was zero-terminated.
-.
-.
-.SH "SUBJECT STRING OFFSETS"
-.rs
-.sp
-The lengths and starting offsets of subject strings must be specified in 32-bit
-data units, and the offsets within subject strings that are returned by the
-matching functions are in also 32-bit units rather than bytes.
-.
-.
-.SH "NAMED SUBPATTERNS"
-.rs
-.sp
-The name-to-number translation table that is maintained for named subpatterns
-uses 32-bit characters. The \fBpcre32_get_stringtable_entries()\fP function
-returns the length of each entry in the table as the number of 32-bit data
-units.
-.
-.
-.SH "OPTION NAMES"
-.rs
-.sp
-There are two new general option names, PCRE_UTF32 and PCRE_NO_UTF32_CHECK,
-which correspond to PCRE_UTF8 and PCRE_NO_UTF8_CHECK in the 8-bit library. In
-fact, these new options define the same bits in the options word. There is a
-discussion about the
-.\" HTML <a href="pcreunicode.html#utf32strings">
-.\" </a>
-validity of UTF-32 strings
-.\"
-in the
-.\" HREF
-\fBpcreunicode\fP
-.\"
-page.
-.P
-For the \fBpcre32_config()\fP function there is an option PCRE_CONFIG_UTF32
-that returns 1 if UTF-32 support is configured, otherwise 0. If this option is
-given to \fBpcre_config()\fP or \fBpcre16_config()\fP, or if the
-PCRE_CONFIG_UTF8 or PCRE_CONFIG_UTF16 option is given to \fBpcre32_config()\fP,
-the result is the PCRE_ERROR_BADOPTION error.
-.
-.
-.SH "CHARACTER CODES"
-.rs
-.sp
-In 32-bit mode, when PCRE_UTF32 is not set, character values are treated in the
-same way as in 8-bit, non UTF-8 mode, except, of course, that they can range
-from 0 to 0x7fffffff instead of 0 to 0xff. Character types for characters less
-than 0xff can therefore be influenced by the locale in the same way as before.
-Characters greater than 0xff have only one case, and no "type" (such as letter
-or digit).
-.P
-In UTF-32 mode, the character code is Unicode, in the range 0 to 0x10ffff, with
-the exception of values in the range 0xd800 to 0xdfff because those are
-"surrogate" values that are ill-formed in UTF-32.
-.P
-A UTF-32 string can indicate its endianness by special code knows as a
-byte-order mark (BOM). The PCRE functions do not handle this, expecting strings
-to be in host byte order. A utility function called
-\fBpcre32_utf32_to_host_byte_order()\fP is provided to help with this (see
-above).
-.
-.
-.SH "ERROR NAMES"
-.rs
-.sp
-The error PCRE_ERROR_BADUTF32 corresponds to its 8-bit counterpart.
-The error PCRE_ERROR_BADMODE is given when a compiled
-pattern is passed to a function that processes patterns in the other
-mode, for example, if a pattern compiled with \fBpcre_compile()\fP is passed to
-\fBpcre32_exec()\fP.
-.P
-There are new error codes whose names begin with PCRE_UTF32_ERR for invalid
-UTF-32 strings, corresponding to the PCRE_UTF8_ERR codes for UTF-8 strings that
-are described in the section entitled
-.\" HTML <a href="pcreapi.html#badutf8reasons">
-.\" </a>
-"Reason codes for invalid UTF-8 strings"
-.\"
-in the main
-.\" HREF
-\fBpcreapi\fP
-.\"
-page. The UTF-32 errors are:
-.sp
- PCRE_UTF32_ERR1 Surrogate character (range from 0xd800 to 0xdfff)
- PCRE_UTF32_ERR2 Non-character
- PCRE_UTF32_ERR3 Character > 0x10ffff
-.
-.
-.SH "ERROR TEXTS"
-.rs
-.sp
-If there is an error while compiling a pattern, the error text that is passed
-back by \fBpcre32_compile()\fP or \fBpcre32_compile2()\fP is still an 8-bit
-character string, zero-terminated.
-.
-.
-.SH "CALLOUTS"
-.rs
-.sp
-The \fIsubject\fP and \fImark\fP fields in the callout block that is passed to
-a callout function point to 32-bit vectors.
-.
-.
-.SH "TESTING"
-.rs
-.sp
-The \fBpcretest\fP program continues to operate with 8-bit input and output
-files, but it can be used for testing the 32-bit library. If it is run with the
-command line option \fB-32\fP, patterns and subject strings are converted from
-8-bit to 32-bit before being passed to PCRE, and the 32-bit library functions
-are used instead of the 8-bit ones. Returned 32-bit strings are converted to
-8-bit for output. If both the 8-bit and the 16-bit libraries were not compiled,
-\fBpcretest\fP defaults to 32-bit and the \fB-32\fP option is ignored.
-.P
-When PCRE is being built, the \fBRunTest\fP script that is called by "make
-check" uses the \fBpcretest\fP \fB-C\fP option to discover which of the 8-bit,
-16-bit and 32-bit libraries has been built, and runs the tests appropriately.
-.
-.
-.SH "NOT SUPPORTED IN 32-BIT MODE"
-.rs
-.sp
-Not all the features of the 8-bit library are available with the 32-bit
-library. The C++ and POSIX wrapper functions support only the 8-bit library,
-and the \fBpcregrep\fP program is at present 8-bit only.
-.
-.
-.SH AUTHOR
-.rs
-.sp
-.nf
-Philip Hazel
-University Computing Service
-Cambridge CB2 3QH, England.
-.fi
-.
-.
-.SH REVISION
-.rs
-.sp
-.nf
-Last updated: 12 May 2013
-Copyright (c) 1997-2013 University of Cambridge.
-.fi