Display hint message when given impossible prefix.

Split source into multiple files.
Add experimental, unoptimized OpenCL implementation.
Bump version to 0.13

Makefile

@@ -1,9 +1,16 @@
 LIBS=-lpcre -lcrypto -lm -lpthread
 CFLAGS=-ggdb -O3 -Wall
-OBJS=vanitygen.o
+OBJS=vanitygen.o oclvanitygen.o pattern.o
+PROGS=vanitygen
+TESTS=
 
-vanitygen: $(OBJS)
-	$(CC) $(OBJS) -o $@ $(CFLAGS) $(LIBS)
+all: $(PROGS)
+
+vanitygen: vanitygen.o pattern.o
+	$(CC) $^ -o $@ $(CFLAGS) $(LIBS)
+
+oclvanitygen: oclvanitygen.o pattern.o
+	$(CC) $^ -o $@ $(CFLAGS) $(LIBS) -lOpenCL
 
 clean:
-	rm -f $(OBJS) vanitygen
+	rm -f $(OBJS) $(PROGS) $(TESTS)

Makefile.Win32

@@ -4,7 +4,7 @@ PTHREADS_DIR = C:\pthreads-w32
 PCRE_DIR = C:\pcre-7.9-src
 CFLAGS = /D_WIN32 /DPTW32_STATIC_LIB /DPCRE_STATIC /I$(OPENSSL_DIR)\include /I$(PTHREADS_DIR) /I$(PCRE_DIR)
 LIBS = $(OPENSSL_DIR)\lib\libeay32.lib $(PTHREADS_DIR)\pthread.lib $(PCRE_DIR)\pcre.lib ws2_32.lib
-OBJS = vanitygen.obj
+OBJS = vanitygen.obj pattern.obj winglue.obj
 
 all: vanitygen.exe
 
@@ -15,5 +15,4 @@ vanitygen.exe: $(OBJS)
 	$(CC) $(CFLAGS) /c /Tp$< /Fo$@
 
 clean:
-	del vanitygen.exe
-	del vanitygen.obj
+	del vanitygen.exe $(OBJS)