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* configure.ac: Check for srand48 and drand48.

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* src/misc/random.cc (srand, drand): Use srand48 and drand48 if
available.
This commit is contained in:
Alexandre Duret-Lutz 2004-11-12 18:27:09 +00:00
parent 5bcb6091fd
commit 4a7486bbff
3 changed files with 15 additions and 3 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2004-11-12 Alexandre Duret-Lutz <adl@src.lip6.fr> 2004-11-12 Alexandre Duret-Lutz <adl@src.lip6.fr>
* configure.ac: Check for srand48 and drand48.
* src/misc/random.cc (srand, drand): Use srand48 and drand48 if
available.
* src/tgbaalgos/randomgraph.cc, src/tgbaalgos/randomgraph.hh: New files. * src/tgbaalgos/randomgraph.cc, src/tgbaalgos/randomgraph.hh: New files.
* src/tgbaalgos/Makefile.am (tgbaalgos_HEADERS) * src/tgbaalgos/Makefile.am (tgbaalgos_HEADERS)
(libtgbaalgos_la_SOURCES): Add them. (libtgbaalgos_la_SOURCES): Add them.

2
configure.ac
View file

@ -45,6 +45,8 @@ AX_CHECK_BUDDY
AX_CHECK_LBTT AX_CHECK_LBTT
AX_CHECK_GSPNLIB AX_CHECK_GSPNLIB
AC_CHECK_FUNCS([srand48 drand48])
AC_LIBTOOL_WIN32_DLL AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL AC_PROG_LIBTOOL

12
src/misc/random.cc
View file

@ -27,24 +27,30 @@ namespace spot
void void
srand(unsigned int seed) srand(unsigned int seed)
{ {
#if HAVE_SRAND48 && HAVE_DRAND48
::srand48(seed);
#else
::srand(seed); ::srand(seed);
#endif
} }
double double
drand() drand()
{ {
#if HAVE_SRAND48 && HAVE_DRAND48
return ::drand48();
#else
double r = ::rand(); double r = ::rand();
return r / (1.0 + RAND_MAX); return r / (1.0 + RAND_MAX);
#endif
} }
int int
mrand(int max) mrand(int max)
{ {
int res = static_cast<int>(max * drand()); return static_cast<int>(max * drand());
return res;
} }
int int
rrand(int min, int max) rrand(int min, int max)
{ {