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/*
* This file contains some public functions
* usable for both the backend and the frontend.
* Tatsuo Ishii
* $Id: common.c,v 1.1 1998/07/24 03:31:56 scrappy Exp $ */
#include <stdio.h>
#include <string.h>
#include "mb/pg_wchar.h"
/*
* convert encoding char to encoding symbol value.
* case is ignored.
* if there's no valid encoding, returns -1
*/
int pg_char_to_encoding(const char *s)
{
pg_encoding_conv_tbl *p = pg_conv_tbl;
for(;p->encoding >= 0;p++) {
if (!strcasecmp(s, p->name)) {
break;
}
}
return(p->encoding);
}
/*
* check to see if encoding name is valid
*/
int pg_valid_client_encoding(const char *name)
{
return(pg_char_to_encoding(name));
}
/*
* find encoding table entry by encoding
*/
pg_encoding_conv_tbl *pg_get_encent_by_encoding(int encoding)
{
pg_encoding_conv_tbl *p = pg_conv_tbl;
for(;p->encoding >= 0;p++) {
if (p->encoding == encoding) {
return(p);
}
}
return(0);
}
/*
* convert encoding symbol to encoding char.
* if there's no valid encoding symbol, returns ""
*/
const char *pg_encoding_to_char(int encoding)
{
pg_encoding_conv_tbl *p = pg_get_encent_by_encoding(encoding);
if (!p) return("");
return(p->name);
}
/* returns the byte length of a multi-byte word for an encoding */
int pg_encoding_mblen(int encoding, const unsigned char *mbstr)
{
return((*pg_wchar_table[encoding].mblen)(mbstr));
}
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