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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
** Class definitions to format ASCII data.
*/
#if defined(_RCASCII_H)
#else
#define _RCASCII_H
/*
** RCFormatStuff
** This class maintains no state - that is the responsibility of
** the class' client. For each call to Sx_printf(), the StuffFunction
** will be called for each embedded "%" in the 'fmt' string and once
** for each interveaning literal.
*/
class PR_IMPLEMENT(RCFormatStuff)
{
public:
RCFormatStuff();
virtual ~RCFormatStuff();
/*
** Process the arbitrary argument list using as indicated by
** the 'fmt' string. Each segment of the processing the stuff
** function is called with the relavent translation.
*/
virtual PRInt32 Sx_printf(void *state, const char *fmt, ...);
/*
** The 'state' argument is not processed by the runtime. It
** is merely passed from the Sx_printf() call. It is intended
** to be used by the client to figure out what to do with the
** new string.
**
** The new string ('stuff') is ASCII translation driven by the
** Sx_printf()'s 'fmt' string. It is not guaranteed to be a null
** terminated string.
**
** The return value is the number of bytes copied from the 'stuff'
** string. It is accumulated for each of the calls to the stuff
** function and returned from the original caller of Sx_printf().
*/
virtual PRSize StuffFunction(
void *state, const char *stuff, PRSize stufflen) = 0;
}; /* RCFormatStuff */
/*
** RCFormatBuffer
** The caller is supplying the buffer, the runtime is doing all
** the conversion. The object contains no state, so is reusable
** and reentrant.
*/
class PR_IMPLEMENT(RCFormatBuffer): public RCFormatStuff
{
public:
RCFormatBuffer();
virtual ~RCFormatBuffer();
/*
** Format the trailing arguments as indicated by the 'fmt'
** string. Put the result in 'buffer'. Return the number
** of bytes moved into 'buffer'. 'buffer' will always be
** a properly terminated string even if the convresion fails.
*/
virtual PRSize Sn_printf(
char *buffer, PRSize length, const char *fmt, ...);
virtual char *Sm_append(char *buffer, const char *fmt, ...);
private:
/*
** This class overrides the stuff function, does not preserve
** its virtual-ness and no longer allows the clients to call
** it in the clear. In other words, it is now the implementation
** for this class.
*/
PRSize StuffFunction(void*, const char*, PRSize);
}; /* RCFormatBuffer */
/*
** RCFormat
** The runtime is supplying the buffer. The object has state - the
** buffer. Each operation must run to completion before the object
** can be reused. When it is, the buffer is reset (whatever that
** means). The result of a conversion is available via the extractor.
** After extracted, the memory still belongs to the class - if the
** caller wants to retain or modify, it must first be copied.
*/
class PR_IMPLEMENT(RCFormat): pubic RCFormatBuffer
{
public:
RCFormat();
virtual ~RCFormat();
/*
** Translate the trailing arguments according to the 'fmt'
** string and store the results in the object.
*/
virtual PRSize Sm_printf(const char *fmt, ...);
/*
** Extract the latest translation.
** The object does not surrender the memory occupied by
** the string. If the caller wishes to modify the data,
** it must first be copied.
*/
const char*();
private:
char *buffer;
RCFormat(const RCFormat&);
RCFormat& operator=(const RCFormat&);
}; /* RCFormat */
/*
** RCPrint
** The output is formatted and then written to an associated file
** descriptor. The client can provide a suitable file descriptor
** or can indicate that the output should be directed to one of
** the well-known "console" devices.
*/
class PR_IMPLEMENT(RCPrint): public RCFormat
{
virtual ~RCPrint();
RCPrint(RCIO* output);
RCPrint(RCFileIO::SpecialFile output);
virtual PRSize Printf(const char *fmt, ...);
private:
RCPrint();
}; /* RCPrint */
#endif /* defined(_RCASCII_H) */
/* RCAscii.h */
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