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2cb64bf6 | 1 | ?RCS: Copyright (c) 2006-2007, H.Merijn Brand |
0065f4af | 2 | ?RCS: |
65a32477 | 3 | ?RCS: You may redistribute only under the terms of the Artistic License, |
a0b547f1 MB |
4 | ?RCS: as specified in the README file that comes with the distribution. |
5 | ?RCS: You may reuse parts of this distribution only within the terms of | |
65a32477 | 6 | ?RCS: that same Artistic License; a copy of which may be found at the root |
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7 | ?RCS: of the source tree for dist 3.0. |
8 | ?RCS: | |
2cb64bf6 | 9 | ?MAKE:d_snprintf d_vsnprintf : Inlibc Compile cat run rm_try |
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10 | ?MAKE: -pick add $@ %< |
11 | ?S:d_snprintf: | |
12 | ?S: This variable conditionally defines the HAS_SNPRINTF symbol, which | |
13 | ?S: indicates to the C program that the snprintf () library function | |
14 | ?S: is available. | |
15 | ?S:. | |
16 | ?S:d_vsnprintf: | |
17 | ?S: This variable conditionally defines the HAS_VSNPRINTF symbol, which | |
18 | ?S: indicates to the C program that the vsnprintf () library function | |
19 | ?S: is available. | |
20 | ?S:. | |
21 | ?C:HAS_SNPRINTF: | |
22 | ?C: This symbol, if defined, indicates that the snprintf () library | |
23 | ?C: function is available for use. | |
24 | ?C:. | |
25 | ?C:HAS_VSNPRINTF: | |
26 | ?C: This symbol, if defined, indicates that the vsnprintf () library | |
27 | ?C: function is available for use. | |
28 | ?C:. | |
29 | ?H:#$d_snprintf HAS_SNPRINTF /**/ | |
30 | ?H:#$d_vsnprintf HAS_VSNPRINTF /**/ | |
31 | ?H:. | |
0065f4af | 32 | ?F:!try |
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33 | : see if snprintf exists |
34 | set snprintf d_snprintf | |
35 | eval $inlibc | |
36 | ||
37 | : see if vsnprintf exists | |
38 | set vsnprintf d_vsnprintf | |
39 | eval $inlibc | |
40 | ||
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41 | case "$d_snprintf-$d_vsnprintf" in |
42 | "$define-$define") | |
43 | $cat <<EOM | |
44 | Checking whether your snprintf() and vsnprintf() work okay... | |
45 | EOM | |
46 | $cat >try.c <<'EOCP' | |
47 | /* v?snprintf testing logic courtesy of Russ Allbery. | |
48 | * According to C99: | |
49 | * - if the buffer is too short it still must be \0-terminated | |
50 | * - if the buffer is too short the potentially required length | |
51 | * must be returned and not -1 | |
52 | * - if the buffer is NULL the potentially required length | |
53 | * must be returned and not -1 or core dump | |
54 | */ | |
55 | #include <stdio.h> | |
56 | #include <stdarg.h> | |
57 | ||
58 | char buf[2]; | |
59 | ||
60 | int test (char *format, ...) | |
61 | { | |
62 | va_list args; | |
63 | int count; | |
64 | ||
65 | va_start (args, format); | |
66 | count = vsnprintf (buf, sizeof buf, format, args); | |
67 | va_end (args); | |
68 | return count; | |
69 | } | |
70 | ||
71 | int main () | |
72 | { | |
73 | return ((test ("%s", "abcd") == 4 && buf[0] == 'a' && buf[1] == '\0' | |
74 | && snprintf (NULL, 0, "%s", "abcd") == 4) ? 0 : 1); | |
75 | } | |
76 | EOCP | |
77 | set try | |
78 | if eval $compile; then | |
79 | `$run ./try` | |
80 | case "$?" in | |
81 | 0) echo "Your snprintf() and vsnprintf() seem to be working okay." ;; | |
82 | *) cat <<EOM >&4 | |
83 | Your snprintf() and snprintf() don't seem to be working okay. | |
84 | EOM | |
85 | d_snprintf="$undef" | |
86 | d_vsnprintf="$undef" | |
87 | ;; | |
88 | esac | |
89 | else | |
90 | echo "(I can't seem to compile the test program--assuming they don't)" | |
91 | d_snprintf="$undef" | |
92 | d_vsnprintf="$undef" | |
93 | fi | |
2cb64bf6 | 94 | $rm_try |
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95 | ;; |
96 | esac | |
97 |