From 354bb40e75d94466e91fe6960523612c9d17ccfb Mon Sep 17 00:00:00 2001 From: Karen Arutyunov Date: Thu, 2 Nov 2017 23:11:29 +0300 Subject: Add implementation --- mysql/mysql/service_my_snprintf.h | 101 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 mysql/mysql/service_my_snprintf.h (limited to 'mysql/mysql/service_my_snprintf.h') diff --git a/mysql/mysql/service_my_snprintf.h b/mysql/mysql/service_my_snprintf.h new file mode 100644 index 0000000..d734ae1 --- /dev/null +++ b/mysql/mysql/service_my_snprintf.h @@ -0,0 +1,101 @@ +#ifndef MYSQL_SERVICE_MY_SNPRINTF_INCLUDED +#define MYSQL_SERVICE_MY_SNPRINTF_INCLUDED +/* Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved. + + 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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: + % + where everithing but the format is optional. + + Three one-character flags are recognized: + '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 and can be specified as numbers or '*'. + If an asterisk is used, an argument of type int is consumed. + + can be 'l', 'll', or 'z'. + + Supported formats are 's' (null pointer is accepted, printed as + "(null)"), 'b' (extension, see below), 'c', 'd', 'i', 'u', 'x', 'o', + '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 bytes from the + argument, without stopping at '\0'. +*/ + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef MYSQL_ABI_CHECK +#include +#include +#endif + +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 + +#endif /* #define MYSQL_SERVICE_MY_SNPRINTF_INCLUDED */ -- cgit v1.1