Use 'case' statements instead of 'expr' invocations.

[gnulib.git] / m4 / sprintf-posix.m4

diff --git a/m4/sprintf-posix.m4 b/m4/sprintf-posix.m4
index bd28762..9932194 100644 (file)
--- a/m4/sprintf-posix.m4
+++ b/m4/sprintf-posix.m4
@@ -11,12 +11,26 @@ AC_DEFUN([gl_FUNC_SPRINTF_POSIX],
   AC_REQUIRE([gl_PRINTF_DIRECTIVE_A])
   AC_REQUIRE([gl_PRINTF_DIRECTIVE_N])
   AC_REQUIRE([gl_PRINTF_POSITIONS])
-  if expr "$gl_cv_func_printf_sizes_c99" : ".*yes" > /dev/null \
-     && expr "$gl_cv_func_printf_directive_a" : ".*yes" > /dev/null \
-     && expr "$gl_cv_func_printf_directive_n" : ".*yes" > /dev/null \
-     && expr "$gl_cv_func_printf_positions" : ".*yes" > /dev/null; then
-    : # sprintf exists and is already POSIX compliant.
-  else
+  gl_cv_func_sprintf_posix=no
+  case "$gl_cv_func_printf_sizes_c99" in
+    *yes)
+      case "$gl_cv_func_printf_directive_a" in
+        *yes)
+          case "$gl_cv_func_printf_directive_n" in
+            *yes)
+              case "$gl_cv_func_printf_positions" in
+                *yes)
+                  # sprintf exists and is already POSIX compliant.
+                  gl_cv_func_sprintf_posix=yes
+                  ;;
+              esac
+              ;;
+          esac
+          ;;
+      esac
+      ;;
+  esac
+  if test $gl_cv_func_sprintf_posix = no; then
     if ! expr "$gl_cv_func_printf_directive_a" : ".*yes" > /dev/null; then
       AC_DEFINE([NEED_PRINTF_DIRECTIVE_A], 1,
         [Define if the vasnprintf implementation needs special code for