279 lines
8.0 KiB
C
279 lines
8.0 KiB
C
/**
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* @file
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*
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* @section DESCRIPTION
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*
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* These functions provide a portable implementation of the common (but not
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* yet universal) asprintf & vasprintf routines to allocate a buffer big
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* enough to sprintf the arguments to. The XNF variants terminate the server
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* if the allocation fails.
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*/
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/*
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* Copyright (c) 2004 Alexander Gottwald
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name(s) of the above copyright
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* holders shall not be used in advertising or otherwise to promote the sale,
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* use or other dealings in this Software without prior written authorization.
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*/
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/*
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* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <X11/Xos.h>
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#include "os.h"
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#include <stdarg.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#ifdef asprintf
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#undef asprintf
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#endif
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#ifdef vasprintf
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#undef vasprintf
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#endif
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#ifndef va_copy
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#ifdef __va_copy
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#define va_copy __va_copy
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#else
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#error "no working va_copy was found"
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#endif
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#endif
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/**
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* Varargs sprintf that allocates a string buffer the right size for
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* the pattern & data provided and prints the requested data to it.
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*
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* @param ret Pointer to which the newly allocated buffer is written
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* (contents undefined on error)
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* @param format printf style format string
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* @param va variable argument list
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* @return size of allocated buffer, or -1 on error.
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*/
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int
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Xvasprintf(char **ret, const char *_X_RESTRICT_KYWD format, va_list va)
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{
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#ifdef HAVE_VASPRINTF
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return vasprintf(ret, format, va);
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#else
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int size;
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va_list va2;
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va_copy(va2, va);
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size = vsnprintf(NULL, 0, format, va2);
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va_end(va2);
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*ret = malloc(size + 1);
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if (*ret == NULL)
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return -1;
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vsnprintf(*ret, size + 1, format, va);
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(*ret)[size] = 0;
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return size;
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#endif
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}
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#ifndef HAVE_VASPRINTF
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#define vasprintf Xvasprintf
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#endif
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/**
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* sprintf that allocates a string buffer the right size for
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* the pattern & data provided and prints the requested data to it.
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*
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* @param ret Pointer to which the newly allocated buffer is written
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* (contents undefined on error)
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* @param format printf style format string
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* @param ... arguments for specified format
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* @return size of allocated buffer, or -1 on error.
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*/
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int
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Xasprintf(char **ret, const char *_X_RESTRICT_KYWD format, ...)
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{
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int size;
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va_list va;
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va_start(va, format);
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size = vasprintf(ret, format, va);
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va_end(va);
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return size;
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}
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/**
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* Varargs sprintf that allocates a string buffer the right size for
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* the pattern & data provided and prints the requested data to it.
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* On failure, issues a FatalError message and aborts the server.
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*
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* @param ret Pointer to which the newly allocated buffer is written
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* (contents undefined on error)
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* @param format printf style format string
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* @param va variable argument list
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* @return size of allocated buffer
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*/
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int
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XNFvasprintf(char **ret, const char *_X_RESTRICT_KYWD format, va_list va)
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{
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int size = vasprintf(ret, format, va);
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if ((size == -1) || (*ret == NULL)) {
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FatalError("XNFvasprintf failed: %s", strerror(errno));
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}
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return size;
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}
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/**
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* sprintf that allocates a string buffer the right size for
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* the pattern & data provided and prints the requested data to it.
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* On failure, issues a FatalError message and aborts the server.
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*
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* @param ret Pointer to which the newly allocated buffer is written
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* (contents undefined on error)
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* @param format printf style format string
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* @param ... arguments for specified format
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* @return size of allocated buffer
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*/
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int
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XNFasprintf(char **ret, const char *_X_RESTRICT_KYWD format, ...)
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{
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int size;
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va_list va;
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va_start(va, format);
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size = XNFvasprintf(ret, format, va);
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va_end(va);
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return size;
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}
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/**
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* Varargs snprintf that returns the actual number of bytes (excluding final
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* '\0') that were copied into the buffer.
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* This is opposed to the normal sprintf() usually returns the number of bytes
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* that would have been written.
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*
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* @param s buffer to copy into
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* @param n size of buffer s
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* @param format printf style format string
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* @param va variable argument list
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* @return number of bytes actually copied, excluding final '\0'
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*/
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int
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Xvscnprintf(char *s, int n, const char *format, va_list args)
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{
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int x;
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if (n == 0)
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return 0;
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x = vsnprintf(s, n , format, args);
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return (x >= n) ? (n - 1) : x;
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}
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/**
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* snprintf that returns the actual number of bytes (excluding final '\0') that
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* were copied into the buffer.
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* This is opposed to the normal sprintf() usually returns the number of bytes
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* that would have been written.
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*
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* @param s buffer to copy into
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* @param n size of buffer s
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* @param format printf style format string
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* @param ... arguments for specified format
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* @return number of bytes actually copied, excluding final '\0'
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*/
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int Xscnprintf(char *s, int n, const char *format, ...)
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{
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int x;
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va_list ap;
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va_start(ap, format);
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x = Xvscnprintf(s, n, format, ap);
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va_end(ap);
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return x;
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}
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/* Old api, now deprecated, may be removed in the future */
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char *
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Xvprintf(const char *format, va_list va)
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{
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char *ret;
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if (vasprintf(&ret, format, va) == -1)
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ret = NULL;
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return ret;
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}
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char *
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Xprintf(const char *format, ...)
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{
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char *ret;
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va_list va;
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va_start(va, format);
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if (vasprintf(&ret, format, va) == -1)
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ret = NULL;
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va_end(va);
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return ret;
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}
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char *
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XNFvprintf(const char *format, va_list va)
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{
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char *ret;
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XNFvasprintf(&ret, format, va);
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return ret;
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}
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char *
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XNFprintf(const char *format, ...)
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{
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char *ret;
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va_list va;
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va_start(va, format);
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XNFvasprintf(&ret, format, va);
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va_end(va);
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return ret;
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}
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