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#ifndef MYSQL_SERVICE_MY_SNPRINTF_INCLUDED
/* Copyright (C) 2009 Sun Microsystems, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/**
@file
my_snprintf service
Portable and limited vsnprintf() implementation.
This is a portable, limited vsnprintf() implementation, with some
extra features. "Portable" means that it'll produce identical result
on all platforms (for example, on Windows and Linux system printf %e
formats the exponent differently, on different systems %p either
prints leading 0x or not, %s may accept null pointer or crash on
it). "Limited" means that it does not support all the C89 features.
But it supports few extensions, not in any standard.
my_vsnprintf(to, n, fmt, ap)
@param[out] to A buffer to store the result in
@param[in] n Store up to n-1 characters, followed by an end 0
@param[in] fmt printf-like format string
@param[in] ap Arguments
@return a number of bytes written to a buffer *excluding* terminating '\0'
@post
The syntax of a format string is generally the same:
% <flag> <width> <precision> <length modifier> <format>
where everithing but the format is optional.
Three one-character flags are regognized:
'0' has the standard zero-padding semantics;
'-' is parsed, but silently ignored;
'`' (backtick) is only supported for strings (%s) and means that the
string will be quoted according to MySQL identifier quoting rules.
Both <width> and <precision> can be specified as numbers or '*'.
<length modifier> can be 'l', 'll', or 'z'.
Supported formats are 's' (null pointer is accepted, printed as
"(null)"), 'b' (extension, see below), 'c', 'd', 'u', 'x',
'X', 'p' (works as 0x%x).
Standard syntax for positional arguments $n is supported.
Extensions:
Flag '`' (backtick): see above.
Format 'b': binary buffer, prints exactly <precision> bytes from the
argument, without stopping at '\0'.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <stdarg.h>
#include <stdlib.h>
extern struct my_snprintf_service_st {
size_t (*my_snprintf_type)(char*, size_t, const char*, ...);
size_t (*my_vsnprintf_type)(char *, size_t, const char*, va_list);
} *my_snprintf_service;
#ifdef MYSQL_DYNAMIC_PLUGIN
#define my_vsnprintf my_snprintf_service->my_vsnprintf_type
#define my_snprintf my_snprintf_service->my_snprintf_type
#else
size_t my_snprintf(char* to, size_t n, const char* fmt, ...);
size_t my_vsnprintf(char *to, size_t n, const char* fmt, va_list ap);
#endif
#ifdef __cplusplus
}
#endif
#define MYSQL_SERVICE_MY_SNPRINTF_INCLUDED
#endif
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