migration

os_win32.c

@@ -0,0 +1,92 @@
+#ifndef OS_IMPL_WIN32_C
+#define OS_IMPL_WIN32_C
+
+#include "Windows.h"
+#include "os.h"
+
+void *os_alloc(size_t commitSize) {
+    return VirtualAlloc(NULL, commitSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
+}
+
+void os_reserve(void *ptr) {
+}
+
+void os_decommit(void *ptr) {
+}
+
+void os_free(void *ptr, size_t size) {
+    VirtualFree(ptr, NULL, MEM_RELEASE);
+}
+
+string os_readEntireFile(Arena *arena, string filename) {
+    string result = {0};
+    HANDLE fileHandle = CreateFileA(cstring(arena, filename), GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, NULL, NULL);
+    if (fileHandle != INVALID_HANDLE_VALUE) {
+        LARGE_INTEGER fileSize;
+        if (GetFileSizeEx(fileHandle, &fileSize)) {
+            string readfile = PushString(arena, (size_t)fileSize.QuadPart);
+            if (readfile.str) {
+                DWORD bytesRead;
+                if (ReadFile(fileHandle, readfile.str, (DWORD)fileSize.QuadPart, &bytesRead, NULL) && (fileSize.QuadPart == bytesRead)) {
+                    result = readfile;
+                }
+            }
+        }
+        CloseHandle(fileHandle);
+    }
+    return result;
+}
+
+bool os_writeEntireFile(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
+    bool result = false;
+    HANDLE fileHandle = CreateFileA(cstring(arena, filename), GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, NULL, NULL);
+    if (fileHandle != INVALID_HANDLE_VALUE) {
+        DWORD bytesWritten;
+        if (WriteFile(fileHandle, contents, (DWORD)contentsLength, &bytesWritten, NULL)) {
+            // file written successfully
+            result = bytesWritten == contentsLength;
+        }  
+        CloseHandle(fileHandle);
+    }  
+    return result;
+}
+
+bool os_fileAppend(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
+    bool result = false;
+    HANDLE fileHandle = CreateFileA(cstring(arena, filename), FILE_APPEND_DATA | FILE_GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+    if (fileHandle != INVALID_HANDLE_VALUE) {
+        DWORD bytesWritten;
+        DWORD position = SetFilePointer(fileHandle, 0, NULL, FILE_END);
+        if (WriteFile(fileHandle, contents, (DWORD)contentsLength, &bytesWritten, NULL)) {
+            // file written successfully
+            result = bytesWritten == contentsLength;
+        }
+        CloseHandle(fileHandle);
+    }
+    return result;
+}
+
+function void os_print(StdStream target, const char *fmt, va_list argList) {
+    Scratch scratch = scratchStart(0, 0);
+    string result = strPrintfv(scratch.arena, fmt, argList);
+    DWORD done;
+    HANDLE stdHandle;
+    switch (target) {
+        case StdStream_stdin: 
+            stdHandle = GetStdHandle(STD_INPUT_HANDLE);
+            break;
+        case StdStream_stdout: 
+            stdHandle = GetStdHandle(STD_ERROR_HANDLE);
+            break;
+        case StdStream_stderr: 
+            stdHandle = GetStdHandle(STD_OUTPUT_HANDLE);
+            break;
+        default:
+            stdHandle = GetStdHandle(STD_OUTPUT_HANDLE);
+            break;
+    }
+    WriteFile(stdHandle, result.str, (DWORD)result.length, &done, 0);
+    scratchEnd(scratch);
+}
+
+#endif