use comphelper::rng::uniform_*_distribution everywhere

and automatically seed from time on first use

coverity#1242393 Don't call rand
coverity#1242404 Don't call rand
coverity#1242410 Don't call rand and additionally allow 0xFF as a value
coverity#1242409 Don't call rand
coverity#1242399 Don't call rand
coverity#1242372 Don't call rand
coverity#1242377 Don't call rand
coverity#1242378 Don't call rand
coverity#1242379 Don't call rand
coverity#1242382 Don't call rand
coverity#1242383 Don't call rand
coverity#1242402 Don't call rand
coverity#1242397 Don't call rand
coverity#1242390 Don't call rand
coverity#1242389 Don't call rand
coverity#1242388 Don't call rand
coverity#1242386 Don't call rand
coverity#1242384 Don't call rand
coverity#1242394 Don't call rand

Change-Id: I241feab9cb370e091fd6ccaba2af941eb95bc7cf

2 files changed, 19 insertions, 4 deletions

diff --git a/include/comphelper/random.hxx b/include/comphelper/random.hxx
index 6b5d6eb86377..e7051a860403 100644
--- a/include/comphelper/random.hxx
+++ b/include/comphelper/random.hxx
@@ -18,11 +18,24 @@ namespace comphelper
 namespace rng
 {
 
-/// set initial seed (equivalent of libc srand())
-COMPHELPER_DLLPUBLIC void seed(int i);
+/// reset initial seed, typically you don't call this as the initial seed is taken from the
+//  time on the first use of the distribution functions
+COMPHELPER_DLLPUBLIC void reseed(int i);
 
-/// uniform distribution in [0,1)
-COMPHELPER_DLLPUBLIC double uniform();
+// note that uniform_int_distribution is inclusive of b, i.e. [a,b] while
+// uniform_real_distribution is exclusive of b, i.e. [a,b), [std/boost]::nextafter may be your friend there
+
+/// uniform distribution in [a,b)
+COMPHELPER_DLLPUBLIC double uniform_real_distribution(double a = 0.0, double b = 1.0);
+
+/// uniform distribution in [a,b]
+COMPHELPER_DLLPUBLIC int uniform_int_distribution(int a, int b);
+
+/// uniform distribution in [a,b]
+COMPHELPER_DLLPUBLIC unsigned int uniform_int_distribution(unsigned int a, unsigned int b);
+
+/// uniform distribution in [a,b]
+COMPHELPER_DLLPUBLIC size_t uniform_int_distribution(size_t a, size_t b);
 
 } // namespace
 
diff --git a/include/drawinglayer/tools/converters.hxx b/include/drawinglayer/tools/converters.hxx
index 957973f8bda1..c004e25a7a3c 100644
--- a/include/drawinglayer/tools/converters.hxx
+++ b/include/drawinglayer/tools/converters.hxx
@@ -37,6 +37,8 @@ namespace drawinglayer
             sal_uInt32 nDiscreteHeight,
             sal_uInt32 nMaxQuadratPixels);
 
+        double DRAWINGLAYER_DLLPUBLIC getRandomColorRange();
+
     } // end of namespace tools
 } // end of namespace drawinglayer