Imported pristine psxsdk-20190410 from official repo

1 files changed, 78 insertions, 0 deletions

diff --git a/libpsx/include/bitstring.h b/libpsx/include/bitstring.h
new file mode 100644
index 0000000..a9b4c32
--- /dev/null
+++ b/libpsx/include/bitstring.h
@@ -0,0 +1,78 @@
+/**
+ * PSXSDK
+ *
+ * bitstring.h
+ *
+ * Implementation of bitstring.h, a family of macros found in *BSD
+ * to manipulate bit strings
+ */
+
+#ifndef _BITSTRING_H
+#define _BITSTRING_H
+
+#include <stdlib.h>
+
+typedef unsigned char bitstr_t;
+
+#define bitstr_size(nbits) \
+			( (nbits + 7) >> 3 )
+
+#define bit_alloc(nbits)	\
+		calloc( bitstr_size(nbits) , 1)
+
+#define bit_decl(name, nbits) \
+		name[ bitstr_size(nbits) ]
+
+#define bit_clear(name, bit) \
+		name[ bit >> 3 ] &= ~(1 << (bit & 7) )
+		
+#define bit_set(name, bit) \
+		name[ bit >> 3] |= 1 << (bit & 7)
+		
+#define bit_nclear(name, start, stop) \
+		do{ \
+			int _b__;\
+			for(_b__ = start; _b__ <= stop; _b__++) \
+				bit_clear(name, _b__);\
+		}while(0)
+
+#define bit_nset(name, start, stop) \
+		do{ \
+			int _b__;\
+			for(_b__ = start; _b__ <= stop; _b__++) \
+				bit_set(name, _b__); \
+		}while(0)
+			
+#define bit_test(name, bit) \
+		( name[bit >> 3] & (1 << (bit & 7) ) )
+		
+#define bit_ffs(name, nbits, value) \
+		do{\
+			int _b__;\
+			for(_b__ = 0; _b__ < nbits; _b__++) \
+			{\
+				printf("bb = %d\n", _b__);\
+				if( bit_test(name, _b__) ) \
+				{\
+					*(value) = _b__; \
+					break; \
+				}\
+			}\
+			if( _b__ == nbits ) *(value) = -1;\
+		}while(0)
+
+#define bit_ffc(name, nbits, value) \
+		do{\
+			int _b__;\
+			for(_b__ = 0; _b__ < nbits; _b__++) \
+			{\
+				if( !bit_test(name, _b__) ) \
+				{\
+					*(value) = _b__; \
+					break; \
+				}\
+			}\
+			if( _b__ == nbits ) *(value) = -1;\
+		}while(0)
+		
+#endif