Add stream structure and utilities

2026-08-30 02:18:30 +01:00
parent a51686c8f0
commit c1b2e29c07
9 changed files with 237 additions and 0 deletions
@@ -0,0 +1,40 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#include "stream.h"
+#include "../../common/aliases/aliases.h"
+#include "../../common/assert/assert.h"
+
+void _streamValidate(const WpStream *stream, u64 item_size);
+
+b8 _streamAtEnd(const WpStream *stream, u64 item_size) {
+	_streamValidate(stream, item_size);
+	return stream->position >= stream->count;
+}
+
+b8 _streamHasNext(const WpStream *stream, u64 item_size) {
+	_streamValidate(stream, item_size);
+	return stream->position + 1 < stream->count;
+}
+
+void *_streamPeek(const WpStream *stream, u64 item_size) {
+	if (_streamHasNext(stream, item_size)) {
+		u64 index = (stream->position + 1) * stream->item_size;
+		return (void *)(&((u8 *)(stream->data))[index]);
+	}
+
+	return NULL;
+}
+
+void *_streamConsume(WpStream *stream, u64 item_size) {
+	if (!_streamAtEnd(stream, item_size)) {
+		u64 index = stream->position++ * stream->item_size;
+		return (void *)(&((u8 *)(stream->data))[index]);
+	}
+
+	return NULL;
+}
+
+void _streamValidate(const WpStream *stream, u64 item_size) {
+	wpDebugAssert(stream != NULL, "`stream` should not be NULL");
+	wpRuntimeAssert(stream->item_size == item_size, "Invalid item type provided");
+}
@@ -0,0 +1,75 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#ifndef STREAM_H
+#define STREAM_H
+
+#include "../../common/aliases/aliases.h"
+#include "../../common/platform/platform.h"
+
+#ifdef WP_PLATFORM_CPP
+BEGIN_C_LINKAGE
+#endif // !WP_PLATFORM_CPP
+
+typedef struct {
+	void *data;
+	u64 count;
+	u64 position;
+	u64 item_size;
+} WpStream;
+
+// NOTE (Abdelrahman): WpStream typedefs for readability
+typedef WpStream WpVoidPtrStream;
+typedef WpStream WpC8Stream;
+typedef WpStream WpC16Stream;
+typedef WpStream WpC32Stream;
+typedef WpStream WpU8Stream;
+typedef WpStream WpU16Stream;
+typedef WpStream WpU32Stream;
+typedef WpStream WpU64Stream;
+typedef WpStream WpB8Stream;
+typedef WpStream WpI8Stream;
+typedef WpStream WpI16Stream;
+typedef WpStream WpI32Stream;
+typedef WpStream WpI64Stream;
+typedef WpStream WpF32Stream;
+typedef WpStream WpF64Stream;
+typedef WpStream WpF128Stream;
+typedef WpStream WpUptrStream;
+typedef WpStream WpIptrStream;
+typedef WpStream WpStr8Stream;
+
+#ifdef WP_PLATFORM_CPP
+#define wpStream(TYPE, DATA, SIZE) ([&]() {                                                        \
+	return WpStream{                                                                                 \
+		DATA,                                                                                          \
+		SIZE / sizeof(TYPE),                                                                           \
+		0,                                                                                             \
+		sizeof(TYPE)                                                                                   \
+	};                                                                                               \
+}())
+#else
+#define wpStream(TYPE, DATA, SIZE) (                                                               \
+	(WpStream){                                                                                      \
+		.data      = DATA,                                                                             \
+		.count     = SIZE / sizeof(TYPE),                                                              \
+		.position  = 0,                                                                                \
+		.item_size = sizeof(TYPE)                                                                      \
+	}                                                                                                \
+)
+#endif
+
+#define wpStreamAtEnd(TYPE, STREAM) _streamAtEnd(STREAM, sizeof(TYPE))
+#define wpStreamHasNext(TYPE, STREAM) _streamHasNext(STREAM, sizeof(TYPE))
+#define wpStreamPeek(TYPE, STREAM) ((TYPE *)_streamPeek(STREAM, sizeof(TYPE)))
+#define wpStreamConsume(TYPE, STREAM) ((TYPE *)_streamConsume(STREAM, sizeof(TYPE)))
+
+b8    _streamAtEnd(const WpStream *stream, u64 item_size);
+b8    _streamHasNext(const WpStream *stream, u64 item_size);
+void *_streamPeek(const WpStream *stream, u64 item_size);
+void *_streamConsume(WpStream *stream, u64 item_size);
+
+#ifdef WP_PLATFORM_CPP
+END_C_LINKAGE
+#endif // !WP_PLATFORM_CPP
+
+#endif // !STREAM_H