| 1 | # -*- Autoconf -*- |
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| 2 | |
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| 3 | # Copyright (c) 2008 BBN Technologies Corp. All rights reserved. |
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| 4 | # |
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| 5 | # Redistribution and use in source and binary forms, with or without |
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| 6 | # modification, are permitted provided that the following conditions |
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| 7 | # are met: |
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| 8 | # 1. Redistributions of source code must retain the above copyright |
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| 9 | # notice, this list of conditions and the following disclaimer. |
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| 10 | # 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | # notice, this list of conditions and the following disclaimer in the |
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| 12 | # documentation and/or other materials provided with the distribution. |
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| 13 | # 3. Neither the name of BBN Technologies nor the names of its contributors |
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| 14 | # may be used to endorse or promote products derived from this software |
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| 15 | # without specific prior written permission. |
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| 16 | # |
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| 17 | # THIS SOFTWARE IS PROVIDED BY BBN TECHNOLOGIES AND CONTRIBUTORS ``AS IS'' |
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| 18 | # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 19 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 20 | # ARE DISCLAIMED. IN NO EVENT SHALL BBN TECHNOLOGIES OR CONTRIBUTORS BE |
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| 21 | # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 22 | # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 23 | # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 24 | # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 25 | # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 26 | # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 27 | # POSSIBILITY OF SUCH DAMAGE. |
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| 28 | |
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| 29 | |
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| 30 | # Sets the shell variable snprintf_broken to "yes" if the snprintf() |
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| 31 | # function is broken. |
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| 32 | |
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| 33 | # increment the serial number any time this file is changed |
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| 34 | # serial 0 |
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| 35 | AC_DEFUN([STSW_FUNC_SNPRINTF_BROKEN], |
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| 36 | [ |
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| 37 | stsw_enable_snprintf_tests=yes |
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| 38 | AC_ARG_ENABLE( |
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| 39 | [snprintf-tests], |
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| 40 | [AS_HELP_STRING( |
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| 41 | [--disable-snprintf-tests], |
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| 42 | |
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| 43 | [Do not test whether the return value of snprintf() |
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| 44 | conforms to the C99 standard. Use only if you are |
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| 45 | cross-compiling and you are sure that your snprintf() |
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| 46 | conforms to the C99 standard.])], |
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| 47 | |
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| 48 | [ |
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| 49 | if test "x$enableval" = "xno" ; then |
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| 50 | stsw_enable_snprintf_tests=no |
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| 51 | fi |
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| 52 | ]) |
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| 53 | AC_MSG_CHECKING([whether snprintf tests should be run]) |
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| 54 | AC_MSG_RESULT([$stsw_enable_snprintf_tests]) |
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| 55 | |
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| 56 | snprintf_broken=no |
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| 57 | if test "x$stsw_enable_snprintf_tests" = "xyes" ; then |
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| 58 | AC_CACHE_CHECK( |
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| 59 | [if snprintf is broken], |
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| 60 | [stsw_cv_func_snprintf_broken], |
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| 61 | [ |
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| 62 | AC_LANG_PUSH([C]) |
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| 63 | AC_RUN_IFELSE( |
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| 64 | [AC_LANG_PROGRAM( |
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| 65 | [[ |
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| 66 | #include <stdio.h> |
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| 67 | #include <string.h> |
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| 68 | ]], |
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| 69 | [[ |
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| 70 | char buf[32]; |
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| 71 | const char* teststr = "0123456789ABCDEF"; |
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| 72 | memset(buf, 1, sizeof(buf)); |
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| 73 | if (snprintf(buf, 8, "%s", teststr) != 16) |
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| 74 | return 1; |
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| 75 | if (buf[7] != '\0') |
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| 76 | return 1; |
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| 77 | if (snprintf(buf, sizeof(buf), "%s", teststr) != 16) |
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| 78 | return 1; |
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| 79 | return 0; |
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| 80 | ]])], |
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| 81 | [ |
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| 82 | # action if true |
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| 83 | stsw_cv_func_snprintf_broken=no |
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| 84 | ], |
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| 85 | [ |
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| 86 | # action if false |
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| 87 | stsw_cv_func_snprintf_broken=yes |
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| 88 | ], |
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| 89 | [ |
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| 90 | # action if cross-compiling |
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| 91 | AC_MSG_ERROR([Unable to test if snprintf() is broken when cross-compiling. Manually check snprintf() and use --disable-snprintf-tests if appropriate.]) |
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| 92 | ]) |
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| 93 | AC_LANG_POP([C]) |
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| 94 | ]) |
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| 95 | if test "x$stsw_cv_func_snprintf_broken" = "xyes" ; then |
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| 96 | snprintf_broken=yes |
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| 97 | fi |
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| 98 | fi |
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| 99 | ]) |
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