1194 lines
43 KiB
C++
1194 lines
43 KiB
C++
/*
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* This is a port of the Double Metaphone algorithm for use in PostgreSQL.
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*
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* contrib/fuzzystrmatch/dmetaphone.c
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*
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* Double Metaphone computes 2 "sounds like" strings - a primary and an
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* alternate. In most cases they are the same, but for foreign names
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* especially they can be a bit different, depending on pronunciation.
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*
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* Information on using Double Metaphone can be found at
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* http://www.codeproject.com/string/dmetaphone1.asp
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* and the original article describing it can be found at
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* http://www.cuj.com/documents/s=8038/cuj0006philips/
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*
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* For openGauss we provide 2 functions - one for the primary and one for
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* the alternate. That way the functions are pure text->text mappings that
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* are useful in functional indexes. These are 'dmetaphone' for the
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* primary and 'dmetaphone_alt' for the alternate.
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*
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* Assuming that dmetaphone.so is in $libdir, the SQL to set up the
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* functions looks like this:
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*
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* CREATE FUNCTION dmetaphone (text) RETURNS text
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* LANGUAGE C IMMUTABLE STRICT
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* AS '$libdir/dmetaphone', 'dmetaphone';
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*
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* CREATE FUNCTION dmetaphone_alt (text) RETURNS text
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* LANGUAGE C IMMUTABLE STRICT
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* AS '$libdir/dmetaphone', 'dmetaphone_alt';
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*
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* Note that you have to declare the functions IMMUTABLE if you want to
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* use them in functional indexes, and you have to declare them as STRICT
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* as they do not check for NULL input, and will segfault if given NULL input.
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* (See below for alternative ) Declaring them as STRICT means openGauss
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* will never call them with NULL, but instead assume the result is NULL,
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* which is what we (I) want.
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*
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* Alternatively, compile with -DDMETAPHONE_NOSTRICT and the functions
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* will detect NULL input and return NULL. The you don't have to declare them
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* as STRICT.
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*
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* There is a small inefficiency here - each function call actually computes
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* both the primary and the alternate and then throws away the one it doesn't
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* need. That's the way the perl module was written, because perl can handle
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* a list return more easily than we can in openGauss. The result has been
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* fast enough for my needs, but it could maybe be optimized a bit to remove
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* that behaviour.
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*
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*/
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/***************************** COPYRIGHT NOTICES ***********************
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Most of this code is directly from the Text::DoubleMetaphone perl module
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version 0.05 available from http://www.cpan.org.
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It bears this copyright notice:
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Copyright 2000, Maurice Aubrey <maurice@hevanet.com>.
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All rights reserved.
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This code is based heavily on the C++ implementation by
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Lawrence Philips and incorporates several bug fixes courtesy
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of Kevin Atkinson <kevina@users.sourceforge.net>.
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This module is free software; you may redistribute it and/or
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modify it under the same terms as Perl itself.
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The remaining code is authored by Andrew Dunstan <amdunstan@ncshp.org> and
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<andrew@dunslane.net> and is covered this copyright:
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Copyright 2003, North Carolina State Highway Patrol.
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All rights reserved.
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose, without fee, and without a written agreement
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is hereby granted, provided that the above copyright notice and this
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paragraph and the following two paragraphs appear in all copies.
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IN NO EVENT SHALL THE NORTH CAROLINA STATE HIGHWAY PATROL BE LIABLE TO ANY
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PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
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INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
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DOCUMENTATION, EVEN IF THE NORTH CAROLINA STATE HIGHWAY PATROL HAS BEEN
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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THE NORTH CAROLINA STATE HIGHWAY PATROL SPECIFICALLY DISCLAIMS ANY
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED
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HEREUNDER IS ON AN "AS IS" BASIS, AND THE NORTH CAROLINA STATE HIGHWAY PATROL
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HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
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MODIFICATIONS.
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***********************************************************************/
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/* include these first, according to the docs */
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#ifndef DMETAPHONE_MAIN
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#include "postgres.h"
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#include "knl/knl_variable.h"
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#include "utils/builtins.h"
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/* turn off assertions for embedded function */
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#define NDEBUG
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#endif
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#include <stdio.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <assert.h>
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extern Datum dmetaphone(PG_FUNCTION_ARGS);
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extern Datum dmetaphone_alt(PG_FUNCTION_ARGS);
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/* prototype for the main function we got from the perl module */
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static void DoubleMetaphone(char*, char**);
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#ifndef DMETAPHONE_MAIN
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/*
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* The openGauss visible dmetaphone function.
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*/
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PG_FUNCTION_INFO_V1(dmetaphone);
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Datum dmetaphone(PG_FUNCTION_ARGS)
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{
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text* arg = NULL;
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char *aptr, *codes[2], *code;
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#ifdef DMETAPHONE_NOSTRICT
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if (PG_ARGISNULL(0))
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PG_RETURN_NULL();
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#endif
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arg = PG_GETARG_TEXT_P(0);
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aptr = text_to_cstring(arg);
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DoubleMetaphone(aptr, codes);
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code = codes[0];
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if (!code)
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code = "";
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PG_RETURN_TEXT_P(cstring_to_text(code));
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}
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/*
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* The openGauss visible dmetaphone_alt function.
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*/
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PG_FUNCTION_INFO_V1(dmetaphone_alt);
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Datum dmetaphone_alt(PG_FUNCTION_ARGS)
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{
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text* arg = NULL;
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char *aptr, *codes[2], *code;
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#ifdef DMETAPHONE_NOSTRICT
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if (PG_ARGISNULL(0))
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PG_RETURN_NULL();
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#endif
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arg = PG_GETARG_TEXT_P(0);
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aptr = text_to_cstring(arg);
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DoubleMetaphone(aptr, codes);
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code = codes[1];
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if (!code)
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code = "";
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PG_RETURN_TEXT_P(cstring_to_text(code));
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}
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/* here is where we start the code imported from the perl module */
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/* all memory handling is done with these macros */
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#define META_MALLOC(v, n, t) (v = (t*)palloc(((n) * sizeof(t))))
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#define META_REALLOC(v, n, t) (v = (t*)repalloc((v), ((n) * sizeof(t))))
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/*
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* Don't do pfree - it seems to cause a segv sometimes - which might have just
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* been caused by reloading the module in development.
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* So we rely on context cleanup - Tom Lane says pfree shouldn't be necessary
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* in a case like this.
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*/
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#define META_FREE(x) /* pfree((x)) */
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#else /* not defined DMETAPHONE_MAIN */
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/* use the standard malloc library when not running in openGauss */
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#define META_MALLOC(v, n, t) (v = (t*)malloc(((n) * sizeof(t))))
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#define META_REALLOC(v, n, t) (v = (t*)realloc((v), ((n) * sizeof(t))))
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#define META_FREE(x) free((x))
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#endif /* defined DMETAPHONE_MAIN */
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/* this typedef was originally in the perl module's .h file */
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typedef struct {
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char* str;
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int length;
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int bufsize;
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int free_string_on_destroy;
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}
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metastring;
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/*
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* remaining perl module funcs unchanged except for declaring them static
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* and reformatting to openGauss indentation and to fit in 80 cols.
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*
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*/
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static metastring* NewMetaString(char* init_str)
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{
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metastring* s = NULL;
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char empty_string[] = "";
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META_MALLOC(s, 1, metastring);
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assert(s != NULL);
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if (init_str == NULL)
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init_str = empty_string;
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s->length = strlen(init_str);
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/* preallocate a bit more for potential growth */
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s->bufsize = s->length + 7;
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META_MALLOC(s->str, s->bufsize, char);
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assert(s->str != NULL);
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strncpy(s->str, init_str, s->length + 1);
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s->free_string_on_destroy = 1;
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return s;
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}
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static void DestroyMetaString(metastring* s)
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{
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if (s == NULL)
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return;
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if (s->free_string_on_destroy && (s->str != NULL))
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META_FREE(s->str);
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META_FREE(s);
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}
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static void IncreaseBuffer(metastring* s, int chars_needed)
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{
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META_REALLOC(s->str, (s->bufsize + chars_needed + 10), char);
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assert(s->str != NULL);
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s->bufsize = s->bufsize + chars_needed + 10;
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}
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static void MakeUpper(metastring* s)
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{
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char* i = NULL;
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for (i = s->str; *i; i++)
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*i = toupper((unsigned char)*i);
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}
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static int IsVowel(metastring* s, int pos)
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{
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char c;
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if ((pos < 0) || (pos >= s->length))
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return 0;
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c = *(s->str + pos);
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if ((c == 'A') || (c == 'E') || (c == 'I') || (c == 'O') || (c == 'U') || (c == 'Y'))
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return 1;
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return 0;
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}
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static int SlavoGermanic(metastring* s)
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{
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if ((char*)strstr(s->str, "W"))
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return 1;
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else if ((char*)strstr(s->str, "K"))
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return 1;
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else if ((char*)strstr(s->str, "CZ"))
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return 1;
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else if ((char*)strstr(s->str, "WITZ"))
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return 1;
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else
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return 0;
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}
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static char GetAt(metastring* s, int pos)
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{
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if ((pos < 0) || (pos >= s->length))
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return '\0';
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return ((char)*(s->str + pos));
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}
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static void SetAt(metastring* s, int pos, char c)
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{
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if ((pos < 0) || (pos >= s->length))
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return;
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*(s->str + pos) = c;
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}
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/*
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Caveats: the START value is 0 based
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*/
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static int StringAt(metastring* s, int start, int length, ...)
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{
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char* test = NULL;
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char* pos = NULL;
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va_list ap;
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if ((start < 0) || (start >= s->length))
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return 0;
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pos = (s->str + start);
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va_start(ap, length);
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do {
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test = va_arg(ap, char*);
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if (*test && (strncmp(pos, test, length) == 0))
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return 1;
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} while (strcmp(test, "") != 0);
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va_end(ap);
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return 0;
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}
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static void MetaphAdd(metastring* s, char* new_str)
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{
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int add_length;
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if (new_str == NULL)
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return;
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add_length = strlen(new_str);
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if ((s->length + add_length) > (s->bufsize - 1))
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IncreaseBuffer(s, add_length);
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strcat(s->str, new_str);
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s->length += add_length;
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}
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static void DoubleMetaphone(char* str, char** codes)
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{
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int length;
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metastring* original = NULL;
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metastring* primary = NULL;
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metastring* secondary = NULL;
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int current;
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int last;
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current = 0;
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/* we need the real length and last prior to padding */
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length = strlen(str);
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last = length - 1;
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original = NewMetaString(str);
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/* Pad original so we can index beyond end */
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MetaphAdd(original, " ");
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primary = NewMetaString("");
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secondary = NewMetaString("");
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primary->free_string_on_destroy = 0;
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secondary->free_string_on_destroy = 0;
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MakeUpper(original);
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/* skip these when at start of word */
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if (StringAt(original, 0, 2, "GN", "KN", "PN", "WR", "PS", ""))
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current += 1;
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/* Initial 'X' is pronounced 'Z' e.g. 'Xavier' */
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if (GetAt(original, 0) == 'X') {
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MetaphAdd(primary, "S"); /* 'Z' maps to 'S' */
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MetaphAdd(secondary, "S");
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current += 1;
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}
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/* main loop */
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while ((primary->length < 4) || (secondary->length < 4)) {
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if (current >= length)
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break;
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switch (GetAt(original, current)) {
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case 'A':
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case 'E':
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case 'I':
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case 'O':
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case 'U':
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case 'Y':
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if (current == 0) {
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/* all init vowels now map to 'A' */
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MetaphAdd(primary, "A");
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MetaphAdd(secondary, "A");
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}
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current += 1;
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break;
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case 'B':
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/* "-mb", e.g", "dumb", already skipped over... */
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MetaphAdd(primary, "P");
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MetaphAdd(secondary, "P");
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if (GetAt(original, current + 1) == 'B')
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current += 2;
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else
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current += 1;
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break;
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case '\xc7': /* C with cedilla */
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MetaphAdd(primary, "S");
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MetaphAdd(secondary, "S");
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current += 1;
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break;
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case 'C':
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/* various germanic */
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if ((current > 1) && !IsVowel(original, current - 2) &&
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StringAt(original, (current - 1), 3, "ACH", "") &&
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((GetAt(original, current + 2) != 'I') &&
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((GetAt(original, current + 2) != 'E') ||
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StringAt(original, (current - 2), 6, "BACHER", "MACHER", "")))) {
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MetaphAdd(primary, "K");
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MetaphAdd(secondary, "K");
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current += 2;
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break;
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}
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/* special case 'caesar' */
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if ((current == 0) && StringAt(original, current, 6, "CAESAR", "")) {
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MetaphAdd(primary, "S");
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MetaphAdd(secondary, "S");
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current += 2;
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break;
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}
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/* italian 'chianti' */
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if (StringAt(original, current, 4, "CHIA", "")) {
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MetaphAdd(primary, "K");
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MetaphAdd(secondary, "K");
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current += 2;
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break;
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}
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if (StringAt(original, current, 2, "CH", "")) {
|
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/* find 'michael' */
|
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if ((current > 0) && StringAt(original, current, 4, "CHAE", "")) {
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MetaphAdd(primary, "K");
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MetaphAdd(secondary, "X");
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current += 2;
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break;
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}
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/* greek roots e.g. 'chemistry', 'chorus' */
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if ((current == 0) &&
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(StringAt(original, (current + 1), 5, "HARAC", "HARIS", "") ||
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StringAt(original, (current + 1), 3, "HOR", "HYM", "HIA", "HEM", "")) &&
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!StringAt(original, 0, 5, "CHORE", "")) {
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MetaphAdd(primary, "K");
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MetaphAdd(secondary, "K");
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current += 2;
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break;
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}
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|
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/* germanic, greek, or otherwise 'ch' for 'kh' sound */
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if ((StringAt(original, 0, 4, "VAN ", "VON ", "") || StringAt(original, 0, 3, "SCH", ""))
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|
/* 'architect but not 'arch', 'orchestra', 'orchid' */
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|| StringAt(original, (current - 2), 6, "ORCHES", "ARCHIT", "ORCHID", "") ||
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StringAt(original, (current + 2), 1, "T", "S", "") ||
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((StringAt(original, (current - 1), 1, "A", "O", "U", "E", "") || (current == 0))
|
|
|
|
/*
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|
* e.g., 'wachtler', 'wechsler', but not 'tichner'
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|
*/
|
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&& StringAt(
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original, (current + 2), 1, "L", "R", "N", "M", "B", "H", "F", "V", "W", " ", ""))) {
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|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
} else {
|
|
if (current > 0) {
|
|
if (StringAt(original, 0, 2, "MC", "")) {
|
|
/* e.g., "McHugh" */
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
} else {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "K");
|
|
}
|
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} else {
|
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MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "X");
|
|
}
|
|
}
|
|
current += 2;
|
|
break;
|
|
}
|
|
/* e.g, 'czerny' */
|
|
if (StringAt(original, current, 2, "CZ", "") && !StringAt(original, (current - 2), 4, "WICZ", "")) {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "X");
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
/* e.g., 'focaccia' */
|
|
if (StringAt(original, (current + 1), 3, "CIA", "")) {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "X");
|
|
current += 3;
|
|
break;
|
|
}
|
|
|
|
/* double 'C', but not if e.g. 'McClellan' */
|
|
if (StringAt(original, current, 2, "CC", "") && !((current == 1) && (GetAt(original, 0) == 'M'))) {
|
|
/* 'bellocchio' but not 'bacchus' */
|
|
if (StringAt(original, (current + 2), 1, "I", "E", "H", "") &&
|
|
!StringAt(original, (current + 2), 2, "HU", "")) {
|
|
/* 'accident', 'accede' 'succeed' */
|
|
if (((current == 1) && (GetAt(original, current - 1) == 'A')) ||
|
|
StringAt(original, (current - 1), 5, "UCCEE", "UCCES", "")) {
|
|
MetaphAdd(primary, "KS");
|
|
MetaphAdd(secondary, "KS");
|
|
/* 'bacci', 'bertucci', other italian */
|
|
} else {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "X");
|
|
}
|
|
current += 3;
|
|
break;
|
|
} else { /* Pierce's rule */
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
current += 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (StringAt(original, current, 2, "CK", "CG", "CQ", "")) {
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
if (StringAt(original, current, 2, "CI", "CE", "CY", "")) {
|
|
/* italian vs. english */
|
|
if (StringAt(original, current, 3, "CIO", "CIE", "CIA", "")) {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "X");
|
|
} else {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "S");
|
|
}
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
/* else */
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
|
|
/* name sent in 'mac caffrey', 'mac gregor */
|
|
if (StringAt(original, (current + 1), 2, " C", " Q", " G", ""))
|
|
current += 3;
|
|
else if (StringAt(original, (current + 1), 1, "C", "K", "Q", "") &&
|
|
!StringAt(original, (current + 1), 2, "CE", "CI", ""))
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
break;
|
|
|
|
case 'D':
|
|
if (StringAt(original, current, 2, "DG", "")) {
|
|
if (StringAt(original, (current + 2), 1, "I", "E", "Y", "")) {
|
|
/* e.g. 'edge' */
|
|
MetaphAdd(primary, "J");
|
|
MetaphAdd(secondary, "J");
|
|
current += 3;
|
|
break;
|
|
} else {
|
|
/* e.g. 'edgar' */
|
|
MetaphAdd(primary, "TK");
|
|
MetaphAdd(secondary, "TK");
|
|
current += 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (StringAt(original, current, 2, "DT", "DD", "")) {
|
|
MetaphAdd(primary, "T");
|
|
MetaphAdd(secondary, "T");
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
/* else */
|
|
MetaphAdd(primary, "T");
|
|
MetaphAdd(secondary, "T");
|
|
current += 1;
|
|
break;
|
|
|
|
case 'F':
|
|
if (GetAt(original, current + 1) == 'F')
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
MetaphAdd(primary, "F");
|
|
MetaphAdd(secondary, "F");
|
|
break;
|
|
|
|
case 'G':
|
|
if (GetAt(original, current + 1) == 'H') {
|
|
if ((current > 0) && !IsVowel(original, current - 1)) {
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
if (current < 3) {
|
|
/* 'ghislane', ghiradelli */
|
|
if (current == 0) {
|
|
if (GetAt(original, current + 2) == 'I') {
|
|
MetaphAdd(primary, "J");
|
|
MetaphAdd(secondary, "J");
|
|
} else {
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
}
|
|
current += 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Parker's rule (with some further refinements) - e.g.,
|
|
* 'hugh'
|
|
*/
|
|
if (((current > 1) && StringAt(original, (current - 2), 1, "B", "H", "D", ""))
|
|
/* e.g., 'bough' */
|
|
|| ((current > 2) && StringAt(original, (current - 3), 1, "B", "H", "D", ""))
|
|
/* e.g., 'broughton' */
|
|
|| ((current > 3) && StringAt(original, (current - 4), 1, "B", "H", ""))) {
|
|
current += 2;
|
|
break;
|
|
} else {
|
|
/*
|
|
* e.g., 'laugh', 'McLaughlin', 'cough', 'gough',
|
|
* 'rough', 'tough'
|
|
*/
|
|
if ((current > 2) && (GetAt(original, current - 1) == 'U') &&
|
|
StringAt(original, (current - 3), 1, "C", "G", "L", "R", "T", "")) {
|
|
MetaphAdd(primary, "F");
|
|
MetaphAdd(secondary, "F");
|
|
} else if ((current > 0) && GetAt(original, current - 1) != 'I') {
|
|
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
}
|
|
|
|
current += 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (GetAt(original, current + 1) == 'N') {
|
|
if ((current == 1) && IsVowel(original, 0) && !SlavoGermanic(original)) {
|
|
MetaphAdd(primary, "KN");
|
|
MetaphAdd(secondary, "N");
|
|
} else
|
|
/* not e.g. 'cagney' */
|
|
if (!StringAt(original, (current + 2), 2, "EY", "") && (GetAt(original, current + 1) != 'Y') &&
|
|
!SlavoGermanic(original)) {
|
|
MetaphAdd(primary, "N");
|
|
MetaphAdd(secondary, "KN");
|
|
} else {
|
|
MetaphAdd(primary, "KN");
|
|
MetaphAdd(secondary, "KN");
|
|
}
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
/* 'tagliaro' */
|
|
if (StringAt(original, (current + 1), 2, "LI", "") && !SlavoGermanic(original)) {
|
|
MetaphAdd(primary, "KL");
|
|
MetaphAdd(secondary, "L");
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
/* -ges-,-gep-,-gel-, -gie- at beginning */
|
|
if ((current == 0) && ((GetAt(original, current + 1) == 'Y') || StringAt(original,
|
|
(current + 1),
|
|
2,
|
|
"ES",
|
|
"EP",
|
|
"EB",
|
|
"EL",
|
|
"EY",
|
|
"IB",
|
|
"IL",
|
|
"IN",
|
|
"IE",
|
|
"EI",
|
|
"ER",
|
|
""))) {
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "J");
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
/* -ger-, -gy- */
|
|
if ((StringAt(original, (current + 1), 2, "ER", "") || (GetAt(original, current + 1) == 'Y')) &&
|
|
!StringAt(original, 0, 6, "DANGER", "RANGER", "MANGER", "") &&
|
|
!StringAt(original, (current - 1), 1, "E", "I", "") &&
|
|
!StringAt(original, (current - 1), 3, "RGY", "OGY", "")) {
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "J");
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
/* italian e.g, 'biaggi' */
|
|
if (StringAt(original, (current + 1), 1, "E", "I", "Y", "") ||
|
|
StringAt(original, (current - 1), 4, "AGGI", "OGGI", "")) {
|
|
/* obvious germanic */
|
|
if ((StringAt(original, 0, 4, "VAN ", "VON ", "") || StringAt(original, 0, 3, "SCH", "")) ||
|
|
StringAt(original, (current + 1), 2, "ET", "")) {
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
} else {
|
|
/* always soft if french ending */
|
|
if (StringAt(original, (current + 1), 4, "IER ", "")) {
|
|
MetaphAdd(primary, "J");
|
|
MetaphAdd(secondary, "J");
|
|
} else {
|
|
MetaphAdd(primary, "J");
|
|
MetaphAdd(secondary, "K");
|
|
}
|
|
}
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
if (GetAt(original, current + 1) == 'G')
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
break;
|
|
|
|
case 'H':
|
|
/* only keep if first & before vowel or btw. 2 vowels */
|
|
if (((current == 0) || IsVowel(original, current - 1)) && IsVowel(original, current + 1)) {
|
|
MetaphAdd(primary, "H");
|
|
MetaphAdd(secondary, "H");
|
|
current += 2;
|
|
} else
|
|
/* also takes care of 'HH' */
|
|
current += 1;
|
|
break;
|
|
|
|
case 'J':
|
|
/* obvious spanish, 'jose', 'san jacinto' */
|
|
if (StringAt(original, current, 4, "JOSE", "") || StringAt(original, 0, 4, "SAN ", "")) {
|
|
if (((current == 0) && (GetAt(original, current + 4) == ' ')) ||
|
|
StringAt(original, 0, 4, "SAN ", "")) {
|
|
MetaphAdd(primary, "H");
|
|
MetaphAdd(secondary, "H");
|
|
} else {
|
|
MetaphAdd(primary, "J");
|
|
MetaphAdd(secondary, "H");
|
|
}
|
|
current += 1;
|
|
break;
|
|
}
|
|
|
|
if ((current == 0) && !StringAt(original, current, 4, "JOSE", "")) {
|
|
MetaphAdd(primary, "J"); /* Yankelovich/Jankelowicz */
|
|
MetaphAdd(secondary, "A");
|
|
} else {
|
|
/* spanish pron. of e.g. 'bajador' */
|
|
if (IsVowel(original, current - 1) && !SlavoGermanic(original) &&
|
|
((GetAt(original, current + 1) == 'A') || (GetAt(original, current + 1) == 'O'))) {
|
|
MetaphAdd(primary, "J");
|
|
MetaphAdd(secondary, "H");
|
|
} else {
|
|
if (current == last) {
|
|
MetaphAdd(primary, "J");
|
|
MetaphAdd(secondary, "");
|
|
} else {
|
|
if (!StringAt(original, (current + 1), 1, "L", "T", "K", "S", "N", "M", "B", "Z", "") &&
|
|
!StringAt(original, (current - 1), 1, "S", "K", "L", "")) {
|
|
MetaphAdd(primary, "J");
|
|
MetaphAdd(secondary, "J");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (GetAt(original, current + 1) == 'J') /* it could happen! */
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
break;
|
|
|
|
case 'K':
|
|
if (GetAt(original, current + 1) == 'K')
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
break;
|
|
|
|
case 'L':
|
|
if (GetAt(original, current + 1) == 'L') {
|
|
/* spanish e.g. 'cabrillo', 'gallegos' */
|
|
if (((current == (length - 3)) &&
|
|
StringAt(original, (current - 1), 4, "ILLO", "ILLA", "ALLE", "")) ||
|
|
((StringAt(original, (last - 1), 2, "AS", "OS", "") ||
|
|
StringAt(original, last, 1, "A", "O", "")) &&
|
|
StringAt(original, (current - 1), 4, "ALLE", ""))) {
|
|
MetaphAdd(primary, "L");
|
|
MetaphAdd(secondary, "");
|
|
current += 2;
|
|
break;
|
|
}
|
|
current += 2;
|
|
} else
|
|
current += 1;
|
|
MetaphAdd(primary, "L");
|
|
MetaphAdd(secondary, "L");
|
|
break;
|
|
|
|
case 'M':
|
|
if ((StringAt(original, (current - 1), 3, "UMB", "") &&
|
|
(((current + 1) == last) || StringAt(original, (current + 2), 2, "ER", "")))
|
|
/* 'dumb','thumb' */
|
|
|| (GetAt(original, current + 1) == 'M'))
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
MetaphAdd(primary, "M");
|
|
MetaphAdd(secondary, "M");
|
|
break;
|
|
|
|
case 'N':
|
|
if (GetAt(original, current + 1) == 'N')
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
MetaphAdd(primary, "N");
|
|
MetaphAdd(secondary, "N");
|
|
break;
|
|
|
|
case '\xd1': /* N with tilde */
|
|
current += 1;
|
|
MetaphAdd(primary, "N");
|
|
MetaphAdd(secondary, "N");
|
|
break;
|
|
|
|
case 'P':
|
|
if (GetAt(original, current + 1) == 'H') {
|
|
MetaphAdd(primary, "F");
|
|
MetaphAdd(secondary, "F");
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
/* also account for "campbell", "raspberry" */
|
|
if (StringAt(original, (current + 1), 1, "P", "B", ""))
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
MetaphAdd(primary, "P");
|
|
MetaphAdd(secondary, "P");
|
|
break;
|
|
|
|
case 'Q':
|
|
if (GetAt(original, current + 1) == 'Q')
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
MetaphAdd(primary, "K");
|
|
MetaphAdd(secondary, "K");
|
|
break;
|
|
|
|
case 'R':
|
|
/* french e.g. 'rogier', but exclude 'hochmeier' */
|
|
if ((current == last) && !SlavoGermanic(original) && StringAt(original, (current - 2), 2, "IE", "") &&
|
|
!StringAt(original, (current - 4), 2, "ME", "MA", "")) {
|
|
MetaphAdd(primary, "");
|
|
MetaphAdd(secondary, "R");
|
|
} else {
|
|
MetaphAdd(primary, "R");
|
|
MetaphAdd(secondary, "R");
|
|
}
|
|
|
|
if (GetAt(original, current + 1) == 'R')
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
break;
|
|
|
|
case 'S':
|
|
/* special cases 'island', 'isle', 'carlisle', 'carlysle' */
|
|
if (StringAt(original, (current - 1), 3, "ISL", "YSL", "")) {
|
|
current += 1;
|
|
break;
|
|
}
|
|
|
|
/* special case 'sugar-' */
|
|
if ((current == 0) && StringAt(original, current, 5, "SUGAR", "")) {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "S");
|
|
current += 1;
|
|
break;
|
|
}
|
|
|
|
if (StringAt(original, current, 2, "SH", "")) {
|
|
/* germanic */
|
|
if (StringAt(original, (current + 1), 4, "HEIM", "HOEK", "HOLM", "HOLZ", "")) {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "S");
|
|
} else {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "X");
|
|
}
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
/* italian & armenian */
|
|
if (StringAt(original, current, 3, "SIO", "SIA", "") || StringAt(original, current, 4, "SIAN", "")) {
|
|
if (!SlavoGermanic(original)) {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "X");
|
|
} else {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "S");
|
|
}
|
|
current += 3;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* german & anglicisations, e.g. 'smith' match 'schmidt',
|
|
* 'snider' match 'schneider' also, -sz- in slavic language
|
|
* although in hungarian it is pronounced 's'
|
|
*/
|
|
if (((current == 0) && StringAt(original, (current + 1), 1, "M", "N", "L", "W", "")) ||
|
|
StringAt(original, (current + 1), 1, "Z", "")) {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "X");
|
|
if (StringAt(original, (current + 1), 1, "Z", ""))
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
break;
|
|
}
|
|
|
|
if (StringAt(original, current, 2, "SC", "")) {
|
|
/* Schlesinger's rule */
|
|
if (GetAt(original, current + 2) == 'H') {
|
|
/* dutch origin, e.g. 'school', 'schooner' */
|
|
if (StringAt(original, (current + 3), 2, "OO", "ER", "EN", "UY", "ED", "EM", "")) {
|
|
/* 'schermerhorn', 'schenker' */
|
|
if (StringAt(original, (current + 3), 2, "ER", "EN", "")) {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "SK");
|
|
} else {
|
|
MetaphAdd(primary, "SK");
|
|
MetaphAdd(secondary, "SK");
|
|
}
|
|
current += 3;
|
|
break;
|
|
} else {
|
|
if ((current == 0) && !IsVowel(original, 3) && (GetAt(original, 3) != 'W')) {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "S");
|
|
} else {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "X");
|
|
}
|
|
current += 3;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (StringAt(original, (current + 2), 1, "I", "E", "Y", "")) {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "S");
|
|
current += 3;
|
|
break;
|
|
}
|
|
/* else */
|
|
MetaphAdd(primary, "SK");
|
|
MetaphAdd(secondary, "SK");
|
|
current += 3;
|
|
break;
|
|
}
|
|
|
|
/* french e.g. 'resnais', 'artois' */
|
|
if ((current == last) && StringAt(original, (current - 2), 2, "AI", "OI", "")) {
|
|
MetaphAdd(primary, "");
|
|
MetaphAdd(secondary, "S");
|
|
} else {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "S");
|
|
}
|
|
|
|
if (StringAt(original, (current + 1), 1, "S", "Z", ""))
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
break;
|
|
|
|
case 'T':
|
|
if (StringAt(original, current, 4, "TION", "")) {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "X");
|
|
current += 3;
|
|
break;
|
|
}
|
|
|
|
if (StringAt(original, current, 3, "TIA", "TCH", "")) {
|
|
MetaphAdd(primary, "X");
|
|
MetaphAdd(secondary, "X");
|
|
current += 3;
|
|
break;
|
|
}
|
|
|
|
if (StringAt(original, current, 2, "TH", "") || StringAt(original, current, 3, "TTH", "")) {
|
|
/* special case 'thomas', 'thames' or germanic */
|
|
if (StringAt(original, (current + 2), 2, "OM", "AM", "") ||
|
|
StringAt(original, 0, 4, "VAN ", "VON ", "") || StringAt(original, 0, 3, "SCH", "")) {
|
|
MetaphAdd(primary, "T");
|
|
MetaphAdd(secondary, "T");
|
|
} else {
|
|
MetaphAdd(primary, "0");
|
|
MetaphAdd(secondary, "T");
|
|
}
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
if (StringAt(original, (current + 1), 1, "T", "D", ""))
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
MetaphAdd(primary, "T");
|
|
MetaphAdd(secondary, "T");
|
|
break;
|
|
|
|
case 'V':
|
|
if (GetAt(original, current + 1) == 'V')
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
MetaphAdd(primary, "F");
|
|
MetaphAdd(secondary, "F");
|
|
break;
|
|
|
|
case 'W':
|
|
/* can also be in middle of word */
|
|
if (StringAt(original, current, 2, "WR", "")) {
|
|
MetaphAdd(primary, "R");
|
|
MetaphAdd(secondary, "R");
|
|
current += 2;
|
|
break;
|
|
}
|
|
|
|
if ((current == 0) && (IsVowel(original, current + 1) || StringAt(original, current, 2, "WH", ""))) {
|
|
/* Wasserman should match Vasserman */
|
|
if (IsVowel(original, current + 1)) {
|
|
MetaphAdd(primary, "A");
|
|
MetaphAdd(secondary, "F");
|
|
} else {
|
|
/* need Uomo to match Womo */
|
|
MetaphAdd(primary, "A");
|
|
MetaphAdd(secondary, "A");
|
|
}
|
|
}
|
|
|
|
/* Arnow should match Arnoff */
|
|
if (((current == last) && IsVowel(original, current - 1)) ||
|
|
StringAt(original, (current - 1), 5, "EWSKI", "EWSKY", "OWSKI", "OWSKY", "") ||
|
|
StringAt(original, 0, 3, "SCH", "")) {
|
|
MetaphAdd(primary, "");
|
|
MetaphAdd(secondary, "F");
|
|
current += 1;
|
|
break;
|
|
}
|
|
|
|
/* polish e.g. 'filipowicz' */
|
|
if (StringAt(original, current, 4, "WICZ", "WITZ", "")) {
|
|
MetaphAdd(primary, "TS");
|
|
MetaphAdd(secondary, "FX");
|
|
current += 4;
|
|
break;
|
|
}
|
|
|
|
/* else skip it */
|
|
current += 1;
|
|
break;
|
|
|
|
case 'X':
|
|
/* french e.g. breaux */
|
|
if (!((current == last) && (StringAt(original, (current - 3), 3, "IAU", "EAU", "") ||
|
|
StringAt(original, (current - 2), 2, "AU", "OU", "")))) {
|
|
MetaphAdd(primary, "KS");
|
|
MetaphAdd(secondary, "KS");
|
|
}
|
|
|
|
if (StringAt(original, (current + 1), 1, "C", "X", ""))
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
break;
|
|
|
|
case 'Z':
|
|
/* chinese pinyin e.g. 'zhao' */
|
|
if (GetAt(original, current + 1) == 'H') {
|
|
MetaphAdd(primary, "J");
|
|
MetaphAdd(secondary, "J");
|
|
current += 2;
|
|
break;
|
|
} else if (StringAt(original, (current + 1), 2, "ZO", "ZI", "ZA", "") ||
|
|
(SlavoGermanic(original) && ((current > 0) && GetAt(original, current - 1) != 'T'))) {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "TS");
|
|
} else {
|
|
MetaphAdd(primary, "S");
|
|
MetaphAdd(secondary, "S");
|
|
}
|
|
|
|
if (GetAt(original, current + 1) == 'Z')
|
|
current += 2;
|
|
else
|
|
current += 1;
|
|
break;
|
|
|
|
default:
|
|
current += 1;
|
|
}
|
|
|
|
/*
|
|
* printf("PRIMARY: %s\n", primary->str); printf("SECONDARY: %s\n",
|
|
* secondary->str);
|
|
*/
|
|
}
|
|
|
|
if (primary->length > 4)
|
|
SetAt(primary, 4, '\0');
|
|
|
|
if (secondary->length > 4)
|
|
SetAt(secondary, 4, '\0');
|
|
|
|
*codes = primary->str;
|
|
*++codes = secondary->str;
|
|
|
|
DestroyMetaString(original);
|
|
DestroyMetaString(primary);
|
|
DestroyMetaString(secondary);
|
|
}
|
|
|
|
#ifdef DMETAPHONE_MAIN
|
|
|
|
/* just for testing - not part of the perl code */
|
|
|
|
main(int argc, char** argv)
|
|
{
|
|
char* codes[2];
|
|
|
|
if (argc > 1) {
|
|
DoubleMetaphone(argv[1], codes);
|
|
printf("%s|%s\n", codes[0], codes[1]);
|
|
}
|
|
}
|
|
|
|
#endif
|