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| author | Bruno Haible <bruno@clisp.org> | 2004-01-29 16:03:02 +0000 |
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| committer | Bruno Haible <bruno@clisp.org> | 2009-06-23 12:11:44 +0200 |
| commit | 8c8fad0b1906d2775a285781f4286403d05ba139 (patch) | |
| tree | 269dec4bbfd21cd646f5e18732e1a5a541f5fa57 /gettext-runtime/libasprintf/autosprintf_all.html | |
| parent | 6671f2afc67e0d85fa48b884bbb7a10fa6a4d741 (diff) | |
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autosprintf.html renamed to autosprintf_all.html, to avoid problem
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diff --git a/gettext-runtime/libasprintf/autosprintf_all.html b/gettext-runtime/libasprintf/autosprintf_all.html new file mode 100644 index 0000000..e35f779 --- /dev/null +++ b/gettext-runtime/libasprintf/autosprintf_all.html @@ -0,0 +1,140 @@ +<HTML> +<HEAD> +<!-- This HTML file has been created by texi2html 1.52a + from autosprintf.texi on 18 January 2004 --> + +<TITLE>GNU autosprintf</TITLE> +</HEAD> +<BODY> +<H1>GNU autosprintf, version 1.0</H1> +<H2>Formatted Output to Strings in C++</H2> +<ADDRESS>Bruno Haible</ADDRESS> +<P> +<P><HR><P> +<H1>Table of Contents</H1> +<UL> +<LI><A NAME="TOC1" HREF="autosprintf.html#SEC1">1 Introduction</A> +<LI><A NAME="TOC2" HREF="autosprintf.html#SEC2">2 The <CODE>autosprintf</CODE> class</A> +<LI><A NAME="TOC3" HREF="autosprintf.html#SEC3">3 Using <CODE>autosprintf</CODE> in own programs</A> +</UL> +<P><HR><P> + + +<H1><A NAME="SEC1" HREF="autosprintf.html#TOC1">1 Introduction</A></H1> + +<P> +This package makes the C formatted output routines (<CODE>fprintf</CODE> et al.) +usable in C++ programs, for use with the <CODE><string></CODE> strings and the +<CODE><iostream></CODE> streams. + +</P> +<P> +It allows to write code like + +</P> + +<PRE> +cerr << autosprintf ("syntax error in %s:%d: %s", filename, line, errstring); +</PRE> + +<P> +instead of + +</P> + +<PRE> +cerr << "syntax error in " << filename << ":" << line << ": " << errstring; +</PRE> + +<P> +The benefits of the autosprintf syntax are: + +</P> + +<UL> +<LI> + +It reuses the standard POSIX printf facility. Easy migration from C to C++. + +<LI> + +English sentences are kept together. + +<LI> + +It makes internationalization possible. Internationalization requires format +strings, because in some cases the translator needs to change the order of a +sentence, and more generally it is easier for the translator to work with a +single string for a sentence than with multiple string pieces. + +<LI> + +It reduces the risk of programming errors due to forgotten state in the +output stream (e.g. <CODE>cout << hex;</CODE> not followed by <CODE>cout << dec;</CODE>). +</UL> + + + +<H1><A NAME="SEC2" HREF="autosprintf.html#TOC2">2 The <CODE>autosprintf</CODE> class</A></H1> + +<P> +An instance of class <CODE>autosprintf</CODE> just contains a string with the +formatted output result. Such an instance is usually allocated as an +automatic storage variable, i.e. on the stack, not with <CODE>new</CODE> on the +heap. + +</P> +<P> +The constructor <CODE>autosprintf (const char *format, ...)</CODE> takes a format +string and additional arguments, like the C function <CODE>printf</CODE>. + +</P> +<P> +Conversions to <CODE>char *</CODE> and <CODE>std::string</CODE> are defined that return +the encapsulated string. + +</P> +<P> +The destructor <CODE>~autosprintf ()</CODE> destroys the encapsulated string. + +</P> +<P> +An <CODE>operator <<</CODE> is provided that outputs the encapsulated string to the +given <CODE>ostream</CODE>. + +</P> + + +<H1><A NAME="SEC3" HREF="autosprintf.html#TOC3">3 Using <CODE>autosprintf</CODE> in own programs</A></H1> + +<P> +To use the <CODE>autosprintf</CODE> class in your programs, you need to add + +</P> + +<PRE> +#include "autosprintf.h" +using gnu::autosprintf; +</PRE> + +<P> +to your source code. +The include file defines the class <CODE>autosprintf</CODE>, in a namespace called +<CODE>gnu</CODE>. The <SAMP>`using´</SAMP> statement makes it possible to use the class +without the (otherwise natural) <CODE>gnu::</CODE> prefix. + +</P> +<P> +When linking your program, you need to link with <CODE>libasprintf</CODE>, because +that's where the class is defined. In projects using GNU <CODE>autoconf</CODE>, +this means adding <SAMP>`AC_LIB_LINKFLAGS([asprintf])´</SAMP> to <CODE>configure.in</CODE> +or <CODE>configure.ac</CODE>, and using the @LIBASPRINTF@ Makefile variable that +it provides. + +</P> +<P><HR><P> +This document was generated on 18 January 2004 using the +<A HREF="http://wwwinfo.cern.ch/dis/texi2html/">texi2html</A> +translator version 1.52a.</P> +</BODY> +</HTML> |