m4/vsnprintf-posix.m4


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139

# vsnprintf-posix.m4 serial 19
dnl Copyright (C) 2007-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_FUNC_VSNPRINTF_POSIX],
[
  AC_REQUIRE([gl_FUNC_VSNPRINTF_IS_POSIX])
  if test $gl_cv_func_vsnprintf_posix = no; then
    gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS
    gl_REPLACE_VASNPRINTF
    gl_REPLACE_VSNPRINTF
  fi
])

dnl Test whether vsnprintf exists and is POSIX compliant.
dnl Result is gl_cv_func_vsnprintf_posix.
AC_DEFUN([gl_FUNC_VSNPRINTF_IS_POSIX],
[
  AC_REQUIRE([gl_PRINTF_SIZES_C99])
  AC_REQUIRE([gl_PRINTF_SIZES_C23])
  AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
  AC_REQUIRE([gl_PRINTF_INFINITE])
  AC_REQUIRE([gl_PRINTF_INFINITE_LONG_DOUBLE])
  AC_REQUIRE([gl_PRINTF_DIRECTIVE_A])
  AC_REQUIRE([gl_PRINTF_DIRECTIVE_B])
  AC_REQUIRE([gl_PRINTF_DIRECTIVE_F])
  AC_REQUIRE([gl_PRINTF_DIRECTIVE_N])
  AC_REQUIRE([gl_PRINTF_DIRECTIVE_LS])
  AC_REQUIRE([gl_PRINTF_DIRECTIVE_LC])
  AC_REQUIRE([gl_PRINTF_POSITIONS])
  AC_REQUIRE([gl_PRINTF_FLAG_GROUPING])
  AC_REQUIRE([gl_PRINTF_FLAG_LEFTADJUST])
  AC_REQUIRE([gl_PRINTF_FLAG_ZERO])
  AC_REQUIRE([gl_PRINTF_PRECISION])
  AC_REQUIRE([gl_PRINTF_ENOMEM])
  gl_cv_func_vsnprintf_posix=no
  AC_CHECK_FUNCS([vsnprintf])
  if test $ac_cv_func_vsnprintf = yes; then
    dnl These tests use vsnprintf() if snprintf() does not exist.
    gl_SNPRINTF_TRUNCATION_C99
    gl_SNPRINTF_RETVAL_C99
    gl_SNPRINTF_DIRECTIVE_N
    gl_SNPRINTF_SIZE1
    gl_VSNPRINTF_ZEROSIZE_C99
    case "$gl_cv_func_printf_sizes_c99" in
      *yes)
        case "$gl_cv_func_printf_sizes_c23" in
          *yes)
            case "$gl_cv_func_printf_long_double" in
              *yes)
                case "$gl_cv_func_printf_infinite" in
                  *yes)
                    case "$gl_cv_func_printf_infinite_long_double" in
                      *yes)
                        case "$gl_cv_func_printf_directive_a" in
                          *yes)
                            case "$gl_cv_func_printf_directive_b" in
                              *yes)
                                case "$gl_cv_func_printf_directive_f" in
                                  *yes)
                                    case "$gl_cv_func_printf_directive_n" in
                                      *yes)
                                        case "$gl_cv_func_printf_directive_ls" in
                                          *yes)
                                            case "$gl_cv_func_printf_directive_lc" in
                                              *yes)
                                                case "$gl_cv_func_printf_positions" in
                                                  *yes)
                                                    case "$gl_cv_func_printf_flag_grouping" in
                                                      *yes)
                                                        case "$gl_cv_func_printf_flag_leftadjust" in
                                                          *yes)
                                                            case "$gl_cv_func_printf_flag_zero" in
                                                              *yes)
                                                                case "$gl_cv_func_printf_precision" in
                                                                  *yes)
                                                                    case "$gl_cv_func_printf_enomem" in
                                                                      *yes)
                                                                        case "$gl_cv_func_snprintf_truncation_c99" in
                                                                          *yes)
                                                                            case "$gl_cv_func_snprintf_retval_c99" in
                                                                              *yes)
                                                                                case "$gl_cv_func_snprintf_directive_n" in
                                                                                  *yes)
                                                                                    case "$gl_cv_func_snprintf_size1" in
                                                                                      *yes)
                                                                                        case "$gl_cv_func_vsnprintf_zerosize_c99" in
                                                                                          *yes)
                                                                                            # vsnprintf exists and is
                                                                                            # already POSIX compliant.
                                                                                            gl_cv_func_vsnprintf_posix=yes
                                                                                            ;;
                                                                                        esac
                                                                                        ;;
                                                                                    esac
                                                                                    ;;
                                                                                esac
                                                                                ;;
                                                                            esac
                                                                            ;;
                                                                        esac
                                                                        ;;
                                                                    esac
                                                                    ;;
                                                                esac
                                                                ;;
                                                            esac
                                                            ;;
                                                        esac
                                                        ;;
                                                    esac
                                                    ;;
                                                esac
                                                ;;
                                            esac
                                            ;;
                                        esac
                                        ;;
                                    esac
                                    ;;
                                esac
                                ;;
                            esac
                            ;;
                        esac
                        ;;
                    esac
                    ;;
                esac
                ;;
            esac
            ;;
        esac
        ;;
    esac
  fi
])