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83 lines
1.4 KiB
83 lines
1.4 KiB
/*
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* This file contains some public functions
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* usable for both the backend and the frontend.
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* Tatsuo Ishii
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* $Id: common.c,v 1.7 1999/07/19 06:25:38 momjian Exp $ */
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#include <stdlib.h>
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#include <string.h>
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#ifdef WIN32
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#include "win32.h"
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#else
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#include <unistd.h>
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#endif
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#include "mb/pg_wchar.h"
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/*
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* convert encoding char to encoding symbol value.
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* case is ignored.
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* if there's no valid encoding, returns -1
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*/
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int
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pg_char_to_encoding(const char *s)
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{
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pg_encoding_conv_tbl *p = pg_conv_tbl;
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if (!s)
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return (-1);
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for (; p->encoding >= 0; p++)
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{
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if (!strcasecmp(s, p->name))
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break;
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}
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return (p->encoding);
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}
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/*
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* check to see if encoding name is valid
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*/
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int
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pg_valid_client_encoding(const char *name)
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{
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return (pg_char_to_encoding(name));
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}
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/*
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* find encoding table entry by encoding
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*/
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pg_encoding_conv_tbl *
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pg_get_encent_by_encoding(int encoding)
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{
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pg_encoding_conv_tbl *p = pg_conv_tbl;
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for (; p->encoding >= 0; p++)
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{
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if (p->encoding == encoding)
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return (p);
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}
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return (0);
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}
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/*
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* convert encoding symbol to encoding char.
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* if there's no valid encoding symbol, returns ""
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*/
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const char *
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pg_encoding_to_char(int encoding)
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{
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pg_encoding_conv_tbl *p = pg_get_encent_by_encoding(encoding);
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if (!p)
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return ("");
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return (p->name);
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}
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/* returns the byte length of a multi-byte word for an encoding */
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int
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pg_encoding_mblen(int encoding, const unsigned char *mbstr)
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{
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return ((*pg_wchar_table[encoding].mblen) (mbstr));
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}
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