diff options
Diffstat (limited to 'xorg-server/os/xprintf.c')
| -rw-r--r-- | xorg-server/os/xprintf.c | 170 |
1 files changed, 146 insertions, 24 deletions
diff --git a/xorg-server/os/xprintf.c b/xorg-server/os/xprintf.c index 5a42df2d1..218c3c91f 100644 --- a/xorg-server/os/xprintf.c +++ b/xorg-server/os/xprintf.c @@ -1,6 +1,13 @@ -/*
- * printf routines which xalloc their buffer
- */
+/**
+ * @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
*
@@ -26,6 +33,29 @@ * 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
@@ -35,6 +65,13 @@ #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
@@ -42,11 +79,23 @@ # error "no working va_copy was found"
# endif
#endif
-
-char *
-Xvprintf(const char *format, va_list va)
+
+/**
+ * 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)
{
- char *ret;
+#ifdef HAVE_VASPRINTF
+ return vasprintf(ret, format, va);
+#else
int size;
va_list va2;
@@ -54,12 +103,94 @@ Xvprintf(const char *format, va_list va) size = vsnprintf(NULL, 0, format, va2);
va_end(va2);
- ret = (char *)malloc(size + 1);
- if (ret == NULL)
- return NULL;
+ *ret = malloc(size + 1);
+ if (*ret == NULL)
+ return -1;
- vsnprintf(ret, size + 1, format, va);
+ 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;
}
@@ -68,7 +199,8 @@ char *Xprintf(const char *format, ...) char *ret;
va_list va;
va_start(va, format);
- ret = Xvprintf(format, va);
+ if (vasprintf(&ret, format, va) == -1)
+ ret = NULL;
va_end(va);
return ret;
}
@@ -77,19 +209,9 @@ char * XNFvprintf(const char *format, va_list va)
{
char *ret;
- int size;
- va_list va2;
-
- va_copy(va2, va);
- size = vsnprintf(NULL, 0, format, va2);
- va_end(va2);
- ret = (char *)xnfalloc(size + 1);
- if (ret == NULL)
- return NULL;
+ XNFvasprintf(&ret, format, va);
- vsnprintf(ret, size + 1, format, va);
- ret[size] = 0;
return ret;
}
@@ -98,7 +220,7 @@ char *XNFprintf(const char *format, ...) char *ret;
va_list va;
va_start(va, format);
- ret = XNFvprintf(format, va);
+ XNFvasprintf(&ret, format, va);
va_end(va);
return ret;
}
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