m4/vsnprintf-posix.m4

   1 # vsnprintf-posix.m4 serial 6
   2 dnl Copyright (C) 2007 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_FUNC_VSNPRINTF_POSIX],
   8 [
   9   AC_REQUIRE([gl_EOVERFLOW])
  10   AC_REQUIRE([gl_PRINTF_SIZES_C99])
  11   AC_REQUIRE([gl_PRINTF_DIRECTIVE_A])
  12   AC_REQUIRE([gl_PRINTF_DIRECTIVE_F])
  13   AC_REQUIRE([gl_PRINTF_DIRECTIVE_N])
  14   AC_REQUIRE([gl_PRINTF_POSITIONS])
  15   AC_REQUIRE([gl_PRINTF_FLAG_GROUPING])
  16   AC_REQUIRE([gl_PRINTF_FLAG_ZERO])
  17   gl_cv_func_vsnprintf_posix=no
  18   AC_CHECK_FUNCS([vsnprintf])
  19   if test $ac_cv_func_vsnprintf = yes; then
  20     dnl Assume that if vsnprintf() exists, snprintf() also exists.
  21     gl_SNPRINTF_TRUNCATION_C99
  22     gl_SNPRINTF_RETVAL_C99
  23     gl_SNPRINTF_DIRECTIVE_N
  24     gl_VSNPRINTF_ZEROSIZE_C99
  25     case "$gl_cv_func_printf_sizes_c99" in
  26       *yes)
  27         case "$gl_cv_func_printf_directive_a" in
  28           *yes)
  29             case "$gl_cv_func_printf_directive_f" in
  30               *yes)
  31                 case "$gl_cv_func_printf_directive_n" in
  32                   *yes)
  33                     case "$gl_cv_func_printf_positions" in
  34                       *yes)
  35                         case "$gl_cv_func_printf_flag_grouping" in
  36                           *yes)
  37                             case "$gl_cv_func_printf_flag_zero" in
  38                               *yes)
  39                                 case "$gl_cv_func_snprintf_truncation_c99" in
  40                                   *yes)
  41                                     case "$gl_cv_func_snprintf_retval_c99" in
  42                                       *yes)
  43                                         case "$gl_cv_func_snprintf_directive_n" in
  44                                           *yes)
  45                                             case "$gl_cv_func_vsnprintf_zerosize_c99" in
  46                                               *yes)
  47                                                 # vsnprintf exists and is
  48                                                 # already POSIX compliant.
  49                                                 gl_cv_func_vsnprintf_posix=yes
  50                                                 ;;
  51                                             esac
  52                                             ;;
  53                                         esac
  54                                         ;;
  55                                     esac
  56                                     ;;
  57                                 esac
  58                                 ;;
  59                             esac
  60                             ;;
  61                         esac
  62                         ;;
  63                     esac
  64                     ;;
  65                 esac
  66                 ;;
  67             esac
  68             ;;
  69         esac
  70         ;;
  71     esac
  72   fi
  73   if test $gl_cv_func_vsnprintf_posix = no; then
  74     gl_PREREQ_VASNPRINTF_DIRECTIVE_A
  75     gl_PREREQ_VASNPRINTF_DIRECTIVE_F
  76     gl_PREREQ_VASNPRINTF_FLAG_GROUPING
  77     gl_PREREQ_VASNPRINTF_FLAG_ZERO
  78     gl_REPLACE_VASNPRINTF
  79     gl_REPLACE_VSNPRINTF
  80   fi
  81 ])