Cleanup

include/vase/buffer/append.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include "buffer.h"
+#include "pch.h"
+#include <cstdint>
+
+struct AppendBuffer : Buffer {
+  static constexpr uint32_t CHUNK_SIZE = 1 << 16;
+
+  using TChunk = char[CHUNK_SIZE];
+  std::vector<TChunk *> buf;
+  TChunk *t_current;
+  uint32_t current_offset{0};
+  uint32_t t_offset{0};
+
+  using LChunk = uint32_t[CHUNK_SIZE];
+  std::vector<LChunk *> newlines;
+  LChunk *l_current;
+  uint32_t l_offset{0};
+
+  AppendBuffer();
+
+  ~AppendBuffer();
+
+  inline void key(char c);
+  void append(const char *text, uint32_t length);
+
+  const char *read(uint32_t pos, uint32_t *out_len);
+  uint32_t count_lines(uint32_t pos, uint32_t length);
+
+private:
+  inline void new_text_chunk();
+  inline void new_line_chunk();
+
+  inline uint32_t find_newline(uint32_t target, uint32_t low, uint32_t high);
+
+  inline void _append(const char *text, uint32_t length);
+};

include/vase/buffer/buffer.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include "pch.h"
+
+struct Buffer {
+  virtual const char *read(uint32_t pos, uint32_t *out_len) = 0;
+  virtual uint32_t count_lines(uint32_t pos, uint32_t length) = 0;
+
+  virtual ~Buffer() = default;
+};

include/vase/buffer/original.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include "buffer.h"
+#include "pch.h"
+
+struct OriginalBuffer : Buffer {
+  char *buf;
+  uint32_t length;
+  std::vector<uint32_t> newlines;
+
+  // TODO: replace with file io or even lazy loaded file io for large files/logs etc. later.
+  OriginalBuffer(char *buf, uint32_t length) : buf(buf), length(length) {
+    const char *p = buf;
+    const char *end = buf + length;
+    while (p < end) {
+      p = (const char *)memchr(p, '\n', end - p);
+      if (!p)
+        break;
+      newlines.push_back(uint32_t(p - buf));
+      p++;
+    }
+  }
+
+  ~OriginalBuffer() {
+    free(buf);
+  }
+
+  const char *read(uint32_t pos, uint32_t *out_len);
+  uint32_t count_lines(uint32_t pos, uint32_t length);
+};