[PATCH 1/9] Split out is_printable_string() into util.c

[Grant Likely]

On Tue, Jul 05, 2011 at 12:02:49PM -0700, Simon Glass wrote:
> This useful function is split out so it will be available to programs
> other than ftdump.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>

Acked-by: Grant Likely <grant.likely at secretlab.ca>

> ---
>  Makefile.ftdump |    3 ++-
>  ftdump.c        |   28 +++-------------------------
>  util.c          |   28 ++++++++++++++++++++++++++++
>  util.h          |   11 +++++++++++
>  4 files changed, 44 insertions(+), 26 deletions(-)
> 
> diff --git a/Makefile.ftdump b/Makefile.ftdump
> index b70905a..2744a18 100644
> --- a/Makefile.ftdump
> +++ b/Makefile.ftdump
> @@ -5,7 +5,8 @@
>  #
>  
>  FTDUMP_SRCS = \
> -	ftdump.c
> +	ftdump.c \
> +	util.c
>  
>  FTDUMP_GEN_SRCS =
>  
> diff --git a/ftdump.c b/ftdump.c
> index bce6535..db932e3 100644
> --- a/ftdump.c
> +++ b/ftdump.c
> @@ -11,36 +11,14 @@
>  #include <fdt.h>
>  #include <libfdt_env.h>
>  
> +#include "util.h"
> +
>  #define FTDUMP_BUF_SIZE	65536
>  
>  #define ALIGN(x, a)	(((x) + ((a) - 1)) & ~((a) - 1))
>  #define PALIGN(p, a)	((void *)(ALIGN((unsigned long)(p), (a))))
>  #define GET_CELL(p)	(p += 4, *((const uint32_t *)(p-4)))
>  
> -static int is_printable_string(const void *data, int len)
> -{
> -	const char *s = data;
> -	const char *ss;
> -
> -	/* zero length is not */
> -	if (len == 0)
> -		return 0;
> -
> -	/* must terminate with zero */
> -	if (s[len - 1] != '\0')
> -		return 0;
> -
> -	ss = s;
> -	while (*s && isprint(*s))
> -		s++;
> -
> -	/* not zero, or not done yet */
> -	if (*s != '\0' || (s + 1 - ss) < len)
> -		return 0;
> -
> -	return 1;
> -}
> -
>  static void print_data(const char *data, int len)
>  {
>  	int i;
> @@ -50,7 +28,7 @@ static void print_data(const char *data, int len)
>  	if (len == 0)
>  		return;
>  
> -	if (is_printable_string(data, len)) {
> +	if (util_is_printable_string(data, len)) {
>  		printf(" = \"%s\"", (const char *)data);
>  	} else if ((len % 4) == 0) {
>  		printf(" = <");
> diff --git a/util.c b/util.c
> index d7ac27d..994436f 100644
> --- a/util.c
> +++ b/util.c
> @@ -1,6 +1,9 @@
>  /*
>   * Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
>   *
> + * util_is_printable_string contributed by
> + *	Pantelis Antoniou <pantelis.antoniou AT gmail.com>
> + *
>   * This program is free software; you can redistribute it and/or
>   * modify it under the terms of the GNU General Public License as
>   * published by the Free Software Foundation; either version 2 of the
> @@ -17,6 +20,7 @@
>   *                                                                   USA
>   */
>  
> +#include <ctype.h>
>  #include <stdio.h>
>  #include <stdlib.h>
>  #include <stdarg.h>
> @@ -57,3 +61,27 @@ char *join_path(const char *path, const char *name)
>  	memcpy(str+lenp, name, lenn+1);
>  	return str;
>  }
> +
> +int util_is_printable_string(const void *data, int len)
> +{
> +	const char *s = data;
> +	const char *ss;
> +
> +	/* zero length is not */
> +	if (len == 0)
> +		return 0;
> +
> +	/* must terminate with zero */
> +	if (s[len - 1] != '\0')
> +		return 0;
> +
> +	ss = s;
> +	while (*s && isprint(*s))
> +		s++;
> +
> +	/* not zero, or not done yet */
> +	if (*s != '\0' || (s + 1 - ss) < len)
> +		return 0;
> +
> +	return 1;
> +}
> diff --git a/util.h b/util.h
> index 9cead84..cc68933 100644
> --- a/util.h
> +++ b/util.h
> @@ -1,6 +1,8 @@
>  #ifndef _UTIL_H
>  #define _UTIL_H
>  
> +#include <stdarg.h>
> +
>  /*
>   * Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
>   *
> @@ -53,4 +55,13 @@ static inline void *xrealloc(void *p, size_t len)
>  extern char *xstrdup(const char *s);
>  extern char *join_path(const char *path, const char *name);
>  
> +/**
> + * Check a string of a given length to see if it is all printable and
> + * has a valid terminator.
> + *
> + * @param data	The string to check
> + * @param len	The string length including terminator
> + * @return 1 if a valid printable string, 0 if not */
> +int util_is_printable_string(const void *data, int len);
> +
>  #endif /* _UTIL_H */
> -- 
> 1.7.3.1
>