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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-02-03 17:31:08 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-02-03 17:31:08 +0000 |
commit | 461a420a87186bfe26e32d23768380fc97e4d275 (patch) | |
tree | 36908f83c04a3d26d3ad922d45da05f161573d7f /nuttx/lib | |
parent | 13ff49d906592afcec0c170572411693c8e26d13 (diff) | |
download | px4-nuttx-461a420a87186bfe26e32d23768380fc97e4d275.tar.gz px4-nuttx-461a420a87186bfe26e32d23768380fc97e4d275.tar.bz2 px4-nuttx-461a420a87186bfe26e32d23768380fc97e4d275.zip |
Add avsprintf()
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4365 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/lib')
-rw-r--r-- | nuttx/lib/stdio/Make.defs | 6 | ||||
-rw-r--r-- | nuttx/lib/stdio/lib_asprintf.c | 59 | ||||
-rw-r--r-- | nuttx/lib/stdio/lib_avsprintf.c | 146 |
3 files changed, 156 insertions, 55 deletions
diff --git a/nuttx/lib/stdio/Make.defs b/nuttx/lib/stdio/Make.defs index 8515c5415..7bffb2340 100644 --- a/nuttx/lib/stdio/Make.defs +++ b/nuttx/lib/stdio/Make.defs @@ -1,8 +1,8 @@ ############################################################################ # lib/stdio/Make.defs # -# Copyright (C) 2011 Gregory Nutt. All rights reserved. -# Author: Gregory Nutt <spudmonkey@racsa.co.cr> +# Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt <gnutt@nuttx.org> # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions @@ -35,7 +35,7 @@ STDIO_SRCS = lib_fileno.c lib_printf.c lib_rawprintf.c lib_lowprintf.c \ lib_sprintf.c lib_asprintf.c lib_snprintf.c lib_libsprintf.c \ - lib_vsprintf.c lib_vsnprintf.c lib_libvsprintf.c \ + lib_vsprintf.c lib_avsprintf.c lib_vsnprintf.c lib_libvsprintf.c \ lib_meminstream.c lib_memoutstream.c lib_lowinstream.c \ lib_lowoutstream.c lib_zeroinstream.c lib_nullinstream.c \ lib_nulloutstream.c lib_sscanf.c diff --git a/nuttx/lib/stdio/lib_asprintf.c b/nuttx/lib/stdio/lib_asprintf.c index 343f6dd86..84aaafa46 100644 --- a/nuttx/lib/stdio/lib_asprintf.c +++ b/nuttx/lib/stdio/lib_asprintf.c @@ -1,8 +1,8 @@ /**************************************************************************** * lib/stdio/lib_asprintf.c * - * Copyright (C) 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -38,10 +38,7 @@ ****************************************************************************/ #include <stdio.h> -#include <stdlib.h> -#include <assert.h> - -#include "lib_internal.h" +#include <stdarg.h> /**************************************************************************** * Pre-processor Definitions @@ -95,56 +92,14 @@ int asprintf (FAR char **ptr, const char *fmt, ...) { - struct lib_outstream_s nulloutstream; - struct lib_memoutstream_s memoutstream; - FAR char *buf; va_list ap; - int nbytes; - - DEBUGASSERT(ptr && fmt); - - /* First, use a nullstream to get the size of the buffer. The number - * of bytes returned may or may not include the null terminator. - */ - - lib_nulloutstream(&nulloutstream); - va_start(ap, fmt); - nbytes = lib_vsprintf((FAR struct lib_outstream_s *)&nulloutstream, fmt, ap); - va_end(ap); + int ret; - /* Then allocate a buffer to hold that number of characters, adding one - * for the null terminator. - */ - - buf = (FAR char *)malloc(nulloutstream.nput + 1); - if (!buf) - { - return ERROR; - } - - /* Initialize a memory stream to write into the allocated buffer. The - * memory stream will reserve one byte at the end of the buffer for the - * null terminator and will not report this in the number of output bytes. - */ - - lib_memoutstream((FAR struct lib_memoutstream_s *)&memoutstream, - buf, nulloutstream.nput + 1); - - /* Then let lib_vsprintf do it's real thing */ + /* Let avsprintf do all of the work */ va_start(ap, fmt); - nbytes = lib_vsprintf((FAR struct lib_outstream_s *)&memoutstream.public, fmt, ap); + ret = avsprintf(ptr, fmt, ap); va_end(ap); - /* Return a pointer to the string to the caller. NOTE: the memstream put() - * method has already added the NUL terminator to the end of the string (not - * included in the nput count). - * - * Hmmm.. looks like the memory would be stranded if lib_vsprintf() returned - * an error. Does that ever happen? - */ - - DEBUGASSERT(nbytes < 0 || nbytes == nulloutstream.nput); - *ptr = buf; - return nbytes; + return ret; } diff --git a/nuttx/lib/stdio/lib_avsprintf.c b/nuttx/lib/stdio/lib_avsprintf.c new file mode 100644 index 000000000..8561b97c2 --- /dev/null +++ b/nuttx/lib/stdio/lib_avsprintf.c @@ -0,0 +1,146 @@ +/**************************************************************************** + * lib/stdio/lib_avsprintf.c + * + * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <assert.h> + +#include "lib_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Global Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: avsprintf + * + * Description: + * This function is similar to vsprintf, except that it dynamically + * allocates a string (as with malloc) to hold the output, instead of + * putting the output in a buffer you allocate in advance. The ptr + * argument should be the address of a char * object, and a successful + * call to avsprintf stores a pointer to the newly allocated string at that + * location. + * + * Returned Value: + * The returned value is the number of characters allocated for the buffer, + * or less than zero if an error occurred. Usually this means that the buffer + * could not be allocated. + * + ****************************************************************************/ + +int avsprintf(FAR char **ptr, const char *fmt, va_list ap) +{ + struct lib_outstream_s nulloutstream; + struct lib_memoutstream_s memoutstream; + FAR char *buf; + int nbytes; + + DEBUGASSERT(ptr && fmt); + + /* First, use a nullstream to get the size of the buffer. The number + * of bytes returned may or may not include the null terminator. + */ + + lib_nulloutstream(&nulloutstream); + nbytes = lib_vsprintf((FAR struct lib_outstream_s *)&nulloutstream, fmt, ap); + + /* Then allocate a buffer to hold that number of characters, adding one + * for the null terminator. + */ + + buf = (FAR char *)malloc(nulloutstream.nput + 1); + if (!buf) + { + return ERROR; + } + + /* Initialize a memory stream to write into the allocated buffer. The + * memory stream will reserve one byte at the end of the buffer for the + * null terminator and will not report this in the number of output bytes. + */ + + lib_memoutstream((FAR struct lib_memoutstream_s *)&memoutstream, + buf, nulloutstream.nput + 1); + + /* Then let lib_vsprintf do it's real thing */ + + nbytes = lib_vsprintf((FAR struct lib_outstream_s *)&memoutstream.public, fmt, ap); + + /* Return a pointer to the string to the caller. NOTE: the memstream put() + * method has already added the NUL terminator to the end of the string (not + * included in the nput count). + * + * Hmmm.. looks like the memory would be stranded if lib_vsprintf() returned + * an error. Does that ever happen? + */ + + DEBUGASSERT(nbytes < 0 || nbytes == nulloutstream.nput); + *ptr = buf; + return nbytes; +} |