m4/vsnprintf-posix.m4

   1 # vsnprintf-posix.m4
   2 # serial 23
   3 dnl Copyright (C) 2007-2024 Free Software Foundation, Inc.
   4 dnl This file is free software; the Free Software Foundation
   5 dnl gives unlimited permission to copy and/or distribute it,
   6 dnl with or without modifications, as long as this notice is preserved.
   7
   8 AC_DEFUN([gl_FUNC_VSNPRINTF_POSIX],
   9 [
  10   AC_REQUIRE([gl_FUNC_VSNPRINTF_IS_POSIX])
  11   if test $gl_cv_func_vsnprintf_posix = no; then
  12     gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS
  13     gl_REPLACE_VASNPRINTF
  14     gl_REPLACE_VSNPRINTF
  15   fi
  16 ])
  17
  18 dnl Test whether vsnprintf exists and is POSIX compliant.
  19 dnl Result is gl_cv_func_vsnprintf_posix.
  20 AC_DEFUN([gl_FUNC_VSNPRINTF_IS_POSIX],
  21 [
  22   AC_REQUIRE([gl_PRINTF_SIZES_C99])
  23   AC_REQUIRE([gl_PRINTF_SIZES_C23])
  24   AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
  25   AC_REQUIRE([gl_PRINTF_INFINITE])
  26   AC_REQUIRE([gl_PRINTF_INFINITE_LONG_DOUBLE])
  27   AC_REQUIRE([gl_PRINTF_DIRECTIVE_A])
  28   AC_REQUIRE([gl_PRINTF_DIRECTIVE_B])
  29   AC_REQUIRE([gl_PRINTF_DIRECTIVE_F])
  30   m4_ifdef([gl_PRINTF_SUPPORT_N_DIRECTIVE],[AC_REQUIRE([gl_PRINTF_DIRECTIVE_N])])
  31   AC_REQUIRE([gl_PRINTF_DIRECTIVE_LS])
  32   AC_REQUIRE([gl_PRINTF_DIRECTIVE_LC])
  33   AC_REQUIRE([gl_PRINTF_POSITIONS])
  34   AC_REQUIRE([gl_PRINTF_FLAG_GROUPING])
  35   AC_REQUIRE([gl_PRINTF_FLAG_LEFTADJUST])
  36   AC_REQUIRE([gl_PRINTF_FLAG_ZERO])
  37   AC_REQUIRE([gl_PRINTF_FLAG_ALT_PRECISION_ZERO])
  38   AC_REQUIRE([gl_PRINTF_PRECISION])
  39   AC_REQUIRE([gl_PRINTF_ENOMEM])
  40   gl_cv_func_vsnprintf_posix=no
  41   AC_CHECK_FUNCS([vsnprintf])
  42   if test $ac_cv_func_vsnprintf = yes; then
  43     dnl These tests use vsnprintf() if snprintf() does not exist.
  44     gl_SNPRINTF_TRUNCATION_C99
  45     gl_SNPRINTF_RETVAL_C99
  46     gl_SNPRINTF_DIRECTIVE_N
  47     gl_SNPRINTF_SIZE1
  48     gl_VSNPRINTF_ZEROSIZE_C99
  49     case "$gl_cv_func_printf_sizes_c99" in
  50       *yes)
  51         case "$gl_cv_func_printf_sizes_c23" in
  52           *yes)
  53             case "$gl_cv_func_printf_long_double" in
  54               *yes)
  55                 case "$gl_cv_func_printf_infinite" in
  56                   *yes)
  57                     case "$gl_cv_func_printf_infinite_long_double" in
  58                       *yes)
  59                         case "$gl_cv_func_printf_directive_a" in
  60                           *yes)
  61                             case "$gl_cv_func_printf_directive_b" in
  62                               *yes)
  63                                 case "$gl_cv_func_printf_directive_f" in
  64                                   *yes)
  65                                     case m4_ifdef([gl_PRINTF_SUPPORT_N_DIRECTIVE],["$gl_cv_func_printf_directive_n"],["yes"]) in
  66                                       *yes)
  67                                         case "$gl_cv_func_printf_directive_ls" in
  68                                           *yes)
  69                                             case "$gl_cv_func_printf_directive_lc" in
  70                                               *yes)
  71                                                 case "$gl_cv_func_printf_positions" in
  72                                                   *yes)
  73                                                     case "$gl_cv_func_printf_flag_grouping" in
  74                                                       *yes)
  75                                                         case "$gl_cv_func_printf_flag_leftadjust" in
  76                                                           *yes)
  77                                                             case "$gl_cv_func_printf_flag_zero" in
  78                                                               *yes)
  79                                                                 case "$gl_cv_func_printf_flag_alt_precision_zero" in
  80                                                                   *yes)
  81                                                                     case "$gl_cv_func_printf_precision" in
  82                                                                       *yes)
  83                                                                         case "$gl_cv_func_printf_enomem" in
  84                                                                           *yes)
  85                                                                             case "$gl_cv_func_snprintf_truncation_c99" in
  86                                                                               *yes)
  87                                                                                 case "$gl_cv_func_snprintf_retval_c99" in
  88                                                                                   *yes)
  89                                                                                     case m4_ifdef([gl_PRINTF_SUPPORT_N_DIRECTIVE],["$gl_cv_func_snprintf_directive_n"],["yes"]) in
  90                                                                                       *yes)
  91                                                                                         case "$gl_cv_func_snprintf_size1" in
  92                                                                                           *yes)
  93                                                                                             case "$gl_cv_func_vsnprintf_zerosize_c99" in
  94                                                                                               *yes)
  95                                                                                                 # vsnprintf exists and is
  96                                                                                                 # already POSIX compliant.
  97                                                                                                 gl_cv_func_vsnprintf_posix=yes
  98                                                                                                 ;;
  99                                                                                             esac
 100                                                                                             ;;
 101                                                                                         esac
 102                                                                                         ;;
 103                                                                                     esac
 104                                                                                     ;;
 105                                                                                 esac
 106                                                                                 ;;
 107                                                                             esac
 108                                                                             ;;
 109                                                                         esac
 110                                                                         ;;
 111                                                                     esac
 112                                                                     ;;
 113                                                                 esac
 114                                                                 ;;
 115                                                             esac
 116                                                             ;;
 117                                                         esac
 118                                                         ;;
 119                                                     esac
 120                                                     ;;
 121                                                 esac
 122                                                 ;;
 123                                             esac
 124                                             ;;
 125                                         esac
 126                                         ;;
 127                                     esac
 128                                     ;;
 129                                 esac
 130                                 ;;
 131                             esac
 132                             ;;
 133                         esac
 134                         ;;
 135                     esac
 136                     ;;
 137                 esac
 138                 ;;
 139             esac
 140             ;;
 141         esac
 142         ;;
 143     esac
 144   fi
 145 ])