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Diffstat (limited to 'gnulib/m4/calloc.m4')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/m4/calloc.m4 | 71 |
2 files changed, 71 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/m4/calloc.m4 b/gnulib/m4/calloc.m4 new file mode 100644 index 0000000..3bab709 --- /dev/null +++ b/gnulib/m4/calloc.m4 @@ -0,0 +1,71 @@ +# calloc.m4 serial 13 + +# Copyright (C) 2004-2011 Free Software Foundation, Inc. +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# Written by Jim Meyering. + +# Determine whether calloc (N, S) returns non-NULL when N*S is zero, +# and returns NULL when N*S overflows. +# If so, define HAVE_CALLOC. Otherwise, define calloc to rpl_calloc +# and arrange to use a calloc wrapper function that does work in that case. + +# _AC_FUNC_CALLOC_IF([IF-WORKS], [IF-NOT]) +# ------------------------------------- +# If `calloc (0, 0)' is properly handled, run IF-WORKS, otherwise, IF-NOT. +AC_DEFUN([_AC_FUNC_CALLOC_IF], +[ + AC_REQUIRE([AC_TYPE_SIZE_T])dnl + AC_CACHE_CHECK([for GNU libc compatible calloc], + [ac_cv_func_calloc_0_nonnull], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [AC_INCLUDES_DEFAULT], + [[int result = 0; + if (!calloc (0, 0)) + result |= 1; + if (calloc ((size_t) -1 / 8 + 1, 8)) + result |= 2; + return result; + ]])], + [ac_cv_func_calloc_0_nonnull=yes], + [ac_cv_func_calloc_0_nonnull=no], + [ac_cv_func_calloc_0_nonnull=no])]) + AS_IF([test $ac_cv_func_calloc_0_nonnull = yes], [$1], [$2]) +])# AC_FUNC_CALLOC + + +# gl_FUNC_CALLOC_GNU +# ------------------ +# Report whether `calloc (0, 0)' is properly handled, and replace calloc if +# needed. +AC_DEFUN([gl_FUNC_CALLOC_GNU], +[ + AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) + _AC_FUNC_CALLOC_IF( + [AC_DEFINE([HAVE_CALLOC_GNU], [1], + [Define to 1 if your system has a GNU libc compatible `calloc' + function, and to 0 otherwise.])], + [AC_DEFINE([HAVE_CALLOC_GNU], [0]) + REPLACE_CALLOC=1 + ]) +])# gl_FUNC_CALLOC_GNU + + +# gl_FUNC_CALLOC_POSIX +# -------------------- +# Test whether 'calloc' is POSIX compliant (sets errno to ENOMEM when it +# fails), and replace calloc if it is not. +AC_DEFUN([gl_FUNC_CALLOC_POSIX], +[ + AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) + AC_REQUIRE([gl_CHECK_MALLOC_POSIX]) + if test $gl_cv_func_malloc_posix = yes; then + AC_DEFINE([HAVE_CALLOC_POSIX], [1], + [Define if the 'calloc' function is POSIX compliant.]) + else + REPLACE_CALLOC=1 + fi +]) |