skel

lean/Makefile

@@ -4,9 +4,9 @@
 
 test:
 	gcc -c src/*.c -Iinclude -Wall -pedantic --std=gnu11
-	g++ -c src/*.cpp -Iinclude -Wall -pedantic --std=gnu11
+	g++ -c src/*.cpp -Iinclude -Wall -pedantic --std=gnu++11
 	gcc -o $@ *.o
-
+	./$@
 clean:
 	rm -f test
 	rm -f *.o

lean/include/panic.h

@@ -12,7 +12,21 @@ struct panicinfo {
 };
 
 void _do_panic(struct panicinfo pi, const char* fmt, ...) __attribute__((noreturn));
+
+#ifdef __cplusplus
+extern "C++" {
+#include <utility>
+	template<typename... Args>
+	__attribute__((noreturn)) inline void _real_panic(const char* file, const char* function, int line, const char* fmt, const Args&... args)
+	{
+		panicinfo i = { file, function, line };
+		_do_panic(i, fmt, std::forward<Args>(args)...);
+	}
+#define panic(fmt, ...) _real_panic(__FILE__, __func__, __LINE__, fmt __VA_OPT__(,) __VA_ARGS__)
+}
+#else
 #define panic(fmt, ...) _do_panic( (struct panicinfo){.file = __FILE__, .function = __func__, .line = __LINE__}, fmt __VA_OPT__(,) __VA_ARGS__)
+#endif
 
 #ifdef __cplusplus
 }

lean/include/reinterpret.h

@@ -0,0 +1 @@
+reinterpret.hpp

lean/include/reinterpret.hpp

@@ -3,6 +3,15 @@
 
 #include <panic.h>
 
+#ifdef __cplusplus
+#define restrict __restrict__
+#include <cstddef>
+#include <cstdint>
+#else
+#include <stddef.h>
+#include <stdint.h>
+#endif
+
 #ifdef __cplusplus
 template<typename T>
 struct span {
@@ -14,17 +23,17 @@ struct span {
 		auto bytes = size_bytes();
 		//if (len_b % sizeof(U) != 0) panic("Cannot reinterpret T to U due to unmatch sizing constraints.");
 
-		return span<U>(ptr, bytes / sizeof(U));
+		return span<U>((U*)ptr, bytes / sizeof(U));
 	}
 
-	inline const T& operator[](std::size_t idx) const
+	inline const T& operator[](std::size_t i) const
 	{
-		if (idx >= len) panic("Out of bounds access");
+		if (i >= len) panic("Out of bounds access");
 		return ptr[i];
 	}
-	inline T& operator[](std::size_t idx)
+	inline T& operator[](std::size_t i)
 	{
-		if(idx >= len) panic("Out of bounds access");
+		if(i >= len) panic("Out of bounds access");
 		return ptr[i];
 	}
 
@@ -43,7 +52,7 @@ private:
 
 extern "C" {
 #endif
-uint64_t* bytes_to_long(uint8_t* ptr, size_t ptr_sz, size_t* restrict_ nsize);
+uint64_t* bytes_to_long(uint8_t* ptr, size_t ptr_sz, size_t* restrict nsize);
 float*    bytes_to_float(uint8_t* ptr, size_t ptr_sz, size_t* restrict nsize);
 #ifdef __cplusplus
 }

lean/include/shuffle3.h

@@ -15,7 +15,6 @@ extern "C" {
 #endif
 
 
-
 #ifdef __cplusplus
 }
 #endif

lean/src/main.c

@@ -1,7 +1,16 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <string.h>
+
 
 #include <shuffle3.h>
 #include <panic.h>
+#include <reinterpret.h>
+
+_Static_assert(sizeof(float)==sizeof(uint32_t), "float is not 32 bits");
 
+/*
 static void shuffle_file(const char* filename)
 {
 	panic("unimplemented");
@@ -10,10 +19,33 @@ static void shuffle_file(const char* filename)
 static void unshuffle_file(const char* filename)
 {
 	panic("unimplemented");
+}*/
+
+static void do_test()
+{
+	char* string = "Hello world.. how are you?????";
+	size_t string_sz = strlen(string);
+	size_t outsz;
+
+	uint64_t* string_as_longs = bytes_to_long((uint8_t*)string, string_sz, &outsz);
+
+	printf("%s (%lu) -> u64 %lu\n", string, string_sz, outsz);
+	for (register int i=0;i<outsz;i++) {
+		printf(" %lu\n", string_as_longs[i]);
+	}
+	printf("OK!\n\n");
+
+	float* string_as_floats = bytes_to_float((uint8_t*)string, string_sz, &outsz);
+	printf("%s (%lu) -> f32 %lu\n", string, string_sz, outsz);
+	for (register int i=0;i<outsz;i++) {
+		printf(" %f\n", string_as_floats[i]);
+	}
+	printf("OK!\n\n");
 }
 
 int main(int argc, char** argv)
 {
+	do_test();	
 
 	return 0;
 }

lean/src/reniterpret.cpp

@@ -7,7 +7,7 @@ static inline T* bytes_to_t(std::uint8_t* ptr, std::size_t ptr_sz, std::size_t*
 	span<uint8_t> bytes(ptr, ptr_sz);
 	auto tout = bytes.reinterpret<T>();
 	*nsize = tout.size();
-	return longs.as_ptr();
+	return tout.as_ptr();
 }
 
 extern "C" {