[PATCH] Add compat version of strcasestr

[Dirk Hohndel]

Funny that we both submitted patches...

cworth can decide which one he likes better :-)

/D

On Tue, 13 Apr 2010 05:45:51 +0200, Tomas Carnecky <tom at dbservice.com> wrote:
> strcasestr is not part of any standard (unlike for example strcasecmp) and thus
> not available on all platforms (in my case Solaris).
> 
> ---
>  compat/Makefile.local    |    4 ++++
>  compat/compat.h          |    4 ++++
>  compat/have_strcasestr.c |    8 ++++++++
>  compat/strcasestr.c      |   15 +++++++++++++++
>  configure                |   19 +++++++++++++++++--
>  5 files changed, 48 insertions(+), 2 deletions(-)
>  create mode 100644 compat/have_strcasestr.c
>  create mode 100644 compat/strcasestr.c
> 
> diff --git a/compat/Makefile.local b/compat/Makefile.local
> index 81e6c70..328eca2 100644
> --- a/compat/Makefile.local
> +++ b/compat/Makefile.local
> @@ -8,3 +8,7 @@ notmuch_compat_srcs =
>  ifneq ($(HAVE_GETLINE),1)
>  notmuch_compat_srcs += $(dir)/getline.c $(dir)/getdelim.c
>  endif
> +
> +ifneq ($(HAVE_STRCASESTR),1)
> +notmuch_compat_srcs += $(dir)/strcasestr.c
> +endif
> diff --git a/compat/compat.h b/compat/compat.h
> index d639e0f..be70bd8 100644
> --- a/compat/compat.h
> +++ b/compat/compat.h
> @@ -38,4 +38,8 @@ getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp);
>  
>  #endif /* !HAVE_GETLINE */
>  
> +#if !HAVE_STRCASESTR
> +char *strcasestr(char *a, char *b);
> +#endif /* !HAVE_STRCASESTR */
> +
>  #endif /* NOTMUCH_COMPAT_H */
> diff --git a/compat/have_strcasestr.c b/compat/have_strcasestr.c
> new file mode 100644
> index 0000000..36e760d
> --- /dev/null
> +++ b/compat/have_strcasestr.c
> @@ -0,0 +1,8 @@
> +
> +#include <string.h>
> +#include <strings.h>
> +
> +int main()
> +{
> +	return strcasestr("","");
> +}
> diff --git a/compat/strcasestr.c b/compat/strcasestr.c
> new file mode 100644
> index 0000000..a4188b9
> --- /dev/null
> +++ b/compat/strcasestr.c
> @@ -0,0 +1,15 @@
> +
> +#include <string.h>
> +#include <strings.h>
> +
> +char *strcasestr(char *a, char *b)
> +{
> +  size_t l;
> +  char f[3];
> +  
> +  snprintf(f, sizeof(f), "%c%c", tolower(*b), toupper(*b));
> +  for (l = strcspn(a, f); l != strlen(a); l += strcspn(a + l + 1, f) + 1)
> +    if (strncasecmp(a + l, b, strlen(b)) == 0)
> +      return a + l;
> +  return NULL;
> +}	
> diff --git a/configure b/configure
> index 5af7852..add2da6 100755
> --- a/configure
> +++ b/configure
> @@ -310,6 +310,17 @@ else
>  fi
>  rm -f compat/have_getline
>  
> +printf "Checking for strcasestr... "
> +if ${CC} -o compat/have_strcasestr compat/have_strcasestr.c > /dev/null 2>&1
> +then
> +    printf "Yes.\n"
> +    have_strcasestr=1
> +else
> +    printf "No (will use our own instead).\n"
> +    have_strcasestr=0
> +fi
> +rm -f compat/have_strcasestr
> +
>  cat <<EOF
>  
>  All required packages were found. You may now run the following
> @@ -384,6 +395,10 @@ zsh_completion_dir = \$(prefix)/share/zsh/functions/Completion/Unix
>  # build its own version)
>  HAVE_GETLINE = ${have_getline}
>  
> +# Whether the strcasestr function is available (if not, then notmuch will
> +# build its own version) 
> +HAVE_STRCASESTR = ${have_strcasestr} 
> +
>  # Flags needed to compile and link against Xapian
>  XAPIAN_CXXFLAGS = ${xapian_cxxflags}
>  XAPIAN_LDFLAGS = ${xapian_ldflags}
> @@ -405,9 +420,9 @@ VALGRIND_CFLAGS = ${valgrind_cflags}
>  # Combined flags for compiling and linking against all of the above
>  CONFIGURE_CFLAGS = -DHAVE_GETLINE=\$(HAVE_GETLINE) \$(GMIME_CFLAGS)      \\
>  		   \$(TALLOC_CFLAGS) -DHAVE_VALGRIND=\$(HAVE_VALGRIND)   \\
> -		   \$(VALGRIND_CFLAGS)
> +		   \$(VALGRIND_CFLAGS) -DHAVE_STRCASESTR=\$(HAVE_STRCASESTR)
>  CONFIGURE_CXXFLAGS = -DHAVE_GETLINE=\$(HAVE_GETLINE) \$(GMIME_CFLAGS)    \\
>  		     \$(TALLOC_CFLAGS) -DHAVE_VALGRIND=\$(HAVE_VALGRIND) \\
> -		     \$(VALGRIND_CFLAGS) \$(XAPIAN_CXXFLAGS)
> +		     \$(VALGRIND_CFLAGS) \$(XAPIAN_CXXFLAGS) -DHAVE_STRCASESTR=\$(HAVE_STRCASESTR)
>  CONFIGURE_LDFLAGS =  \$(GMIME_LDFLAGS) \$(TALLOC_LDFLAGS) \$(XAPIAN_LDFLAGS)
>  EOF
> -- 
> 1.7.0.2
> 
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-- 
Dirk Hohndel
Intel Open Source Technology Center