m4/vsnprintf-posix.m4

   1 # vsnprintf-posix.m4 serial 5
   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   gl_cv_func_vsnprintf_posix=no
  17   AC_CHECK_FUNCS([vsnprintf])
  18   if test $ac_cv_func_vsnprintf = yes; then
  19     dnl Assume that if vsnprintf() exists, snprintf() also exists.
  20     gl_SNPRINTF_TRUNCATION_C99
  21     gl_SNPRINTF_RETVAL_C99
  22     gl_SNPRINTF_DIRECTIVE_N
  23     gl_VSNPRINTF_ZEROSIZE_C99
  24     case "$gl_cv_func_printf_sizes_c99" in
  25       *yes)
  26         case "$gl_cv_func_printf_directive_a" in
  27           *yes)
  28             case "$gl_cv_func_printf_directive_f" in
  29               *yes)
  30                 case "$gl_cv_func_printf_directive_n" in
  31                   *yes)
  32                     case "$gl_cv_func_printf_positions" in
  33                       *yes)
  34                         case "$gl_cv_func_printf_flag_grouping" in
  35                           *yes)
  36                             case "$gl_cv_func_snprintf_truncation_c99" in
  37                               *yes)
  38                                 case "$gl_cv_func_snprintf_retval_c99" in
  39                                   *yes)
  40                                     case "$gl_cv_func_snprintf_directive_n" in
  41                                       *yes)
  42                                         case "$gl_cv_func_vsnprintf_zerosize_c99" in
  43                                           *yes)
  44                                             # vsnprintf exists and is already
  45                                             # POSIX compliant.
  46                                             gl_cv_func_vsnprintf_posix=yes
  47                                             ;;
  48                                         esac
  49                                         ;;
  50                                     esac
  51                                     ;;
  52                                 esac
  53                                 ;;
  54                             esac
  55                             ;;
  56                         esac
  57                         ;;
  58                     esac
  59                     ;;
  60                 esac
  61                 ;;
  62             esac
  63             ;;
  64         esac
  65         ;;
  66     esac
  67   fi
  68   if test $gl_cv_func_vsnprintf_posix = no; then
  69     gl_PREREQ_VASNPRINTF_DIRECTIVE_A
  70     gl_PREREQ_VASNPRINTF_DIRECTIVE_F
  71     gl_PREREQ_VASNPRINTF_FLAG_GROUPING
  72     gl_REPLACE_VASNPRINTF
  73     gl_REPLACE_VSNPRINTF
  74   fi
  75 ])