m4/vsnprintf-posix.m4

   1 # vsnprintf-posix.m4 serial 3
   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   gl_cv_func_vsnprintf_posix=no
  16   AC_CHECK_FUNCS([vsnprintf])
  17   if test $ac_cv_func_vsnprintf = yes; then
  18     dnl Assume that if vsnprintf() exists, snprintf() also exists.
  19     gl_SNPRINTF_TRUNCATION_C99
  20     gl_SNPRINTF_RETVAL_C99
  21     gl_SNPRINTF_DIRECTIVE_N
  22     case "$gl_cv_func_printf_sizes_c99" in
  23       *yes)
  24         case "$gl_cv_func_printf_directive_a" in
  25           *yes)
  26             case "$gl_cv_func_printf_directive_f" in
  27               *yes)
  28                 case "$gl_cv_func_printf_directive_n" in
  29                   *yes)
  30                     case "$gl_cv_func_printf_positions" in
  31                       *yes)
  32                         case "$gl_cv_func_snprintf_truncation_c99" in
  33                           *yes)
  34                             case "$gl_cv_func_snprintf_retval_c99" in
  35                               *yes)
  36                                 case "$gl_cv_func_snprintf_directive_n" in
  37                                   *yes)
  38                                     # vsnprintf exists and is already POSIX
  39                                     # compliant.
  40                                     gl_cv_func_vsnprintf_posix=yes
  41                                     ;;
  42                                 esac
  43                                 ;;
  44                             esac
  45                             ;;
  46                         esac
  47                         ;;
  48                     esac
  49                     ;;
  50                 esac
  51                 ;;
  52             esac
  53             ;;
  54         esac
  55         ;;
  56     esac
  57   fi
  58   if test $gl_cv_func_vsnprintf_posix = no; then
  59     gl_PREREQ_VASNPRINTF_DIRECTIVE_A
  60     gl_PREREQ_VASNPRINTF_DIRECTIVE_F
  61     gl_REPLACE_VASNPRINTF
  62     gl_REPLACE_VSNPRINTF
  63   fi
  64 ])