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Diffstat (limited to 'os/xprintf.c')
| -rw-r--r-- | os/xprintf.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/os/xprintf.c b/os/xprintf.c new file mode 100644 index 0000000..254b737 --- /dev/null +++ b/os/xprintf.c @@ -0,0 +1,226 @@ +/** + * @file + * + * @section DESCRIPTION + * + * These functions provide a portable implementation of the common (but not + * yet universal) asprintf & vasprintf routines to allocate a buffer big + * enough to sprintf the arguments to. The XNF variants terminate the server + * if the allocation fails. + */ +/* + * Copyright (c) 2004 Alexander Gottwald + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the name(s) of the above copyright + * holders shall not be used in advertising or otherwise to promote the sale, + * use or other dealings in this Software without prior written authorization. + */ +/* + * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include <X11/Xos.h> +#include "os.h" +#include <stdarg.h> +#include <stdio.h> + +#ifdef asprintf +# undef asprintf +#endif +#ifdef vasprintf +# undef vasprintf +#endif + +#ifndef va_copy +# ifdef __va_copy +# define va_copy __va_copy +# else +# error "no working va_copy was found" +# endif +#endif + +/** + * Varargs sprintf that allocates a string buffer the right size for + * the pattern & data provided and prints the requested data to it. + * + * @param ret Pointer to which the newly allocated buffer is written + * (contents undefined on error) + * @param format printf style format string + * @param va variable argument list + * @return size of allocated buffer, or -1 on error. + */ +int +Xvasprintf(char **ret, const char * _X_RESTRICT_KYWD format, va_list va) +{ +#ifdef HAVE_VASPRINTF + return vasprintf(ret, format, va); +#else + int size; + va_list va2; + + va_copy(va2, va); + size = vsnprintf(NULL, 0, format, va2); + va_end(va2); + + *ret = malloc(size + 1); + if (*ret == NULL) + return -1; + + vsnprintf(*ret, size + 1, format, va); + (*ret)[size] = 0; + return size; +#endif +} + +#ifndef HAVE_VASPRINTF +# define vasprintf Xvasprintf +#endif + +/** + * sprintf that allocates a string buffer the right size for + * the pattern & data provided and prints the requested data to it. + * + * @param ret Pointer to which the newly allocated buffer is written + * (contents undefined on error) + * @param format printf style format string + * @param ... arguments for specified format + * @return size of allocated buffer, or -1 on error. + */ +int +Xasprintf(char ** ret, const char * _X_RESTRICT_KYWD format, ...) +{ + int size; + va_list va; + va_start(va, format); + size = vasprintf(ret, format, va); + va_end(va); + return size; +} + +/** + * Varargs sprintf that allocates a string buffer the right size for + * the pattern & data provided and prints the requested data to it. + * On failure, issues a FatalError message and aborts the server. + * + * @param ret Pointer to which the newly allocated buffer is written + * (contents undefined on error) + * @param format printf style format string + * @param va variable argument list + * @return size of allocated buffer + */ +int +XNFvasprintf(char **ret, const char * _X_RESTRICT_KYWD format, va_list va) +{ + int size = vasprintf(ret, format, va); + if ((size == -1) || (*ret == NULL)) { + Error("XNFvasprintf"); + FatalError("XNFvasprintf failed"); + } + return size; +} + +/** + * sprintf that allocates a string buffer the right size for + * the pattern & data provided and prints the requested data to it. + * On failure, issues a FatalError message and aborts the server. + * + * @param ret Pointer to which the newly allocated buffer is written + * (contents undefined on error) + * @param format printf style format string + * @param ... arguments for specified format + * @return size of allocated buffer + */ +int +XNFasprintf(char ** ret, const char * _X_RESTRICT_KYWD format, ...) +{ + int size; + va_list va; + va_start(va, format); + size = XNFvasprintf(ret, format, va); + va_end(va); + return size; +} + +/* Old api, now deprecated, may be removed in the future */ +char * +Xvprintf(const char *format, va_list va) +{ + char *ret; + + if (vasprintf(&ret, format, va) == -1) + ret = NULL; + + return ret; +} + +char *Xprintf(const char *format, ...) +{ + char *ret; + va_list va; + va_start(va, format); + if (vasprintf(&ret, format, va) == -1) + ret = NULL; + va_end(va); + return ret; +} + +char * +XNFvprintf(const char *format, va_list va) +{ + char *ret; + + XNFvasprintf(&ret, format, va); + + return ret; +} + +char *XNFprintf(const char *format, ...) +{ + char *ret; + va_list va; + va_start(va, format); + XNFvasprintf(&ret, format, va); + va_end(va); + return ret; +} |