Add builtin roundf() for systems lacking it.

(closes issue ASTERISK-16854)
Review: https://reviewboard.asterisk.org/r/2276
Reported-by: Ovidiu Sas
........

Merged revisions 379547 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@379548 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configure.ac

@@ -590,7 +590,7 @@ AC_CHECK_FUNCS([asprintf atexit closefrom dup2 eaccess endpwent euidaccess ffsll
 # so that AC_CHECK_FUNCS can detect functions in that library.
 AC_CHECK_LIB([m], [sqrt])
 # BSD might not have exp2, and/or log2
-AC_CHECK_FUNCS([exp2 log2 exp10 log10 sin cos tan asin acos atan atan2 pow rint exp log remainder fmod round trunc floor ceil])
+AC_CHECK_FUNCS([exp2 log2 exp10 log10 sin cos tan asin acos atan atan2 pow rint exp log remainder fmod round roundf trunc floor ceil])
 
 # Certain architectures don't really have long double, even though
 # AC_CHECK_FUNCS would otherwise find the following functions.

include/asterisk/autoconfig.h.in

@@ -702,6 +702,9 @@
 /* Define to 1 if you have the `round' function. */
 #undef HAVE_ROUND
 
+/* Define to 1 if you have the `roundf' function. */
+#undef HAVE_ROUNDF
+
 /* Define to 1 if you have the `roundl' function. */
 #undef HAVE_ROUNDL
 

include/asterisk/compat.h

@@ -216,4 +216,12 @@ typedef unsigned long long uint64_t;
 #define MY_GLOB_FLAGS   (GLOB_NOMAGIC | GLOB_BRACE)
 #endif
 
+#ifndef HAVE_ROUNDF
+#ifdef HAVE_ROUND
+#define roundf(x) ((float)round(x))
+#else
+float roundf(float x);
+#endif
+#endif
+
 #endif

main/strcompat.c

@@ -17,6 +17,8 @@
 /*! \file
  *
  * \brief Compatibility functions for strsep and strtoq missing on Solaris
+ *
+ * .. and lots of other functions too.
  */
 
 /*** MODULEINFO
@@ -568,3 +570,15 @@ char *mkdtemp(char *path)
 	return mktemp_internal(path, 0, MKTEMP_DIR) ? NULL : path;
 }
 #endif
+
+#ifndef HAVE_ROUNDF
+#ifndef HAVE_ROUND
+float roundf(float x) {
+	if (x < 0.0) {
+		return (float)(int)((x) - 0.5);
+	} else {
+		return (float)(int)((x) + 0.5);
+	}
+}
+#endif
+#endif