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c6ee3d79ad
* cfg.mk: Remove sc_prohibit_have_config_h from local-checks-to-skip * libwget/*.c: Include <config.h> unconditionally * src/*.c: Likewise * tests/*.c: Likewise
128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
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* Copyright(c) 2016 Free Software Foundation, Inc.
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*
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* This file is part of libwget.
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*
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* Libwget is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Libwget is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libwget. If not, see <https://www.gnu.org/licenses/>.
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*
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*
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* printf-style routines using buffer functions
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*
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* Changelog
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* 13.01.2016 Tim Ruehsen created
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*
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*/
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#include <config.h>
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#include <wget.h>
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#include "private.h"
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/**
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* \file
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* \brief Wget printf functions
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* \defgroup libwget-printf Wget printf functions
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* @{
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*
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* This is a collection of printf-style functions that are used with libwget and/or Wget code.
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* They may be useful to other developers that is why they are exported.
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*/
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/**
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* \param[in] strp Pointer to hold the string output
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* \param[in] fmt Printf-like format specifier
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* \param[in] args va_list of arguments
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* \return Length of the string returned via \p strp
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*
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* Prints arguments to allocated memory and 0-terminates it. The string is returned via the first argument.
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* It has to be free()'d by the caller when it is no longer needed.
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*/
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size_t wget_vasprintf(char **strp, const char *fmt, va_list args)
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{
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wget_buffer_t buf;
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wget_buffer_init(&buf, NULL, 128);
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size_t len = wget_buffer_vprintf(&buf, fmt, args);
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if (strp) {
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// shrink memory to real usage
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*strp = xrealloc(buf.data, len + 1);
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} else {
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// behave like C99/POSIX snprintf - just return the length
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xfree(buf.data);
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}
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return len;
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}
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/**
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* \param[in] strp Pointer to hold the string output
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* \param[in] fmt Printf-like format specifier
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* \param[in] ... List of arguments
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* \return Length of the string returned via \p strp
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*
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* Prints arguments to allocated memory and 0-terminates it. The string is returned via the first argument.
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* It has to be free()'d by the caller when it is no longer needed.
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*/
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size_t wget_asprintf(char **strp, const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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size_t len = wget_vasprintf(strp, fmt, args);
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va_end(args);
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return len;
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}
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/**
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* \param[in] fmt Printf-like format specifier
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* \param[in] args va_list of arguments
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* \return Pointer to 0-terminated string in memory
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*
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* Prints arguments to memory and returns a pointer to allocated and 0-terminated chunk of memory.
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* The return value has to be free()'d by the caller when it is no longer needed.
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*/
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char *wget_vaprintf(const char *fmt, va_list args)
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{
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char *s;
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wget_vasprintf(&s, fmt, args);
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return s;
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}
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/**
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* \param[in] fmt Printf-like format specifier
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* \param[in] ... List of arguments
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* \return Pointer to 0-terminated string in memory
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*
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* Prints arguments to memory and returns a pointer to allocated and 0-terminated chunk of memory.
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* The return value has to be free()'d by the caller when it is no longer needed.
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*/
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char *wget_aprintf(const char *fmt, ...)
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{
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va_list args;
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char *s;
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va_start(args, fmt);
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wget_vasprintf(&s, fmt, args);
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va_end(args);
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return s;
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}
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/**@}*/
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