commit f8a04d21d1bfccb3fce8bec4142ef8062c506340
Author: jaxne <jaxne@jaxne.xyz>
Date:   Mon Jun 8 02:32:28 2020 -0600

    aetime: Inital commit
    
    Implemented a basic compilation timer

diff --git a/aetime.c b/aetime.c
new file mode 100644
index 00000000..794648e0
--- /dev/null
+++ b/aetime.c
@@ -0,0 +1,189 @@
+#include <stdint.h>
+
+#define global static
+#define uint unsigned int
+#define u8 uint8_t
+#define u32 uint32_t
+#define f32 float
+
+#define GenerateMagic(a, b, c, d) (((u32)(a) << 0) | ((u32)(b) << 8) | ((u32)(c) << 16) | ((u32)(d) << 24))
+
+#pragma pack(push, 1)
+#define AET_MAGIC_VALUE GenerateMagic('a', 'e', 't', 'c')
+typedef struct timer_file_header {
+    u32 Magic;
+} timer_file_header;
+
+typedef struct timer_file_entry {
+    f32 Elapsed;
+} timer_file_entry;
+
+typedef struct timer_entry_array {
+    u32 EntryCount;
+    timer_file_entry* Entries;
+} timer_entry_array;
+#pragma pack(pop)
+
+// note(jax): Eventually support Mac/Linux...
+#include <stdio.h>
+#include <stdbool.h>
+#include <Windows.h>
+
+int StringLength(char* String) {
+    int Count = 0;
+    while (*String++) {
+        ++Count;
+    }
+    return Count;
+}
+
+bool StringsMatch(char* A, char* B) {
+    if (!A || !B) {
+        return false;
+    }
+
+    while (*A && *B) {
+        if (*A != *B){
+            return false;
+        }
+
+        ++A;
+        ++B;
+    }
+
+    if (*A != *B){
+        return false;
+    } else {
+        return true;
+    }
+}
+
+global f32 GlobalFrequency;
+
+#define COUNTERTOMS   1.f / (GlobalFrequency / 1000.f)
+#define COUNTERTOUS   COUNTERTOMS * 1000.f
+#define COUNTERTONS   COUNTERTOUS * 1000.f
+#define COUNTERTOS    COUNTERTOMS / 1000.f
+
+global void Usage(char** Args) {
+    fprintf(stderr, "Usage: %s --begin <file>.aet [-v|--v|--verbose|-verbose]\n", Args[0]);
+    fprintf(stderr, "       %s --end <file>.aet [-v|--v|--verbose|-verbose]\n", Args[0]);
+}
+
+// This function assumes FileName is a full path with an extension
+char* GetBaseName(char* FileName) {
+    int BaseNameSize = 0;
+    char* BaseName = malloc(sizeof(char)*MAX_PATH);
+    char* BaseNameBegin = FileName;
+    char* BaseNameEnd = FileName + StringLength(FileName);
+    bool RightOfPeriod = false;
+    for (char* Scan = BaseNameBegin; *Scan; ++Scan) {
+        if ((Scan[0] == '\\') || (Scan[0] == '/')) {
+            BaseNameBegin = Scan + 1;
+        }
+
+        if (Scan[0] == '.') {
+            BaseNameEnd = Scan;
+            RightOfPeriod = true;
+        }
+        else if (!RightOfPeriod) {
+            ++BaseNameSize;
+        }
+    }
+
+    memcpy(BaseName, BaseNameBegin, BaseNameSize);
+    BaseName[BaseNameSize] = 0;
+
+    return BaseName;
+}
+
+int main(int ArgCount, char** Args) {
+    bool IsVerbose = false;
+    if (StringsMatch(Args[3], "--verbose") ||
+        StringsMatch(Args[3], "--v") ||
+        StringsMatch(Args[3], "-verbose") ||
+        StringsMatch(Args[3], "-v")) {
+        IsVerbose = true;
+    }
+
+	LARGE_INTEGER _F;
+	QueryPerformanceFrequency(&_F);
+	GlobalFrequency = (f32)_F.QuadPart;
+
+    char Path[MAX_PATH];
+    GetTempPathA(MAX_PATH, Path);
+
+    if (ArgCount >= 3) {
+        if (StringsMatch(Args[1], "--begin")) {
+            char* FileName = Args[2];
+            sprintf(Path, "%s\\%s", Path, FileName);
+            FILE* Dest = fopen(Path, "wb");
+            if (Dest) {
+                if (IsVerbose) {
+                    printf("Writing to '%s'\n", Path);
+                }
+
+                timer_file_header Header = {0};
+                Header.Magic = AET_MAGIC_VALUE;
+                fwrite(&Header, sizeof(Header), 1, Dest);
+
+                LARGE_INTEGER Start;
+                timer_file_entry Entry = {0};
+	            QueryPerformanceCounter(&Start);
+                Entry.Elapsed = (f32)Start.QuadPart;	
+
+                printf("Compilation started for %s\n", GetBaseName(FileName));
+                if (fwrite(&Entry, sizeof(Entry), 1, Dest) != 1) {
+                    fprintf(stderr, "ERROR: Failed to append new start entry to file '%s'.\n", FileName);
+                } else {
+                    fclose(Dest);
+                }
+            } else {
+                fprintf(stderr, "ERROR: Failed to open file '%s'.\n", FileName);
+            }
+        } else if (StringsMatch(Args[1], "--end")) {
+            char* FileName = Args[2];
+            sprintf(Path, "%s\\%s", Path, FileName);
+
+            FILE* Dest = fopen(Path, "rb");
+            if (Dest) {
+                if (IsVerbose) {
+                    printf("Reading from '%s'\n", Path);
+                }
+
+                timer_file_header Header = {0};
+                fread(&Header, sizeof(Header), 1, Dest);
+                if (IsVerbose) {
+                    printf("struct timer_file_header {\n    Magic: %u\n};\n", Header.Magic);
+                }
+
+                timer_file_entry Entry = {0};
+                if(fread(&Entry, sizeof(Entry), 1, Dest) == 1) {
+                    LARGE_INTEGER End;
+	                QueryPerformanceCounter(&End);
+
+                    f32 Elapsed = ((f32)End.QuadPart) - Entry.Elapsed;
+                    f32 Seconds = Elapsed * COUNTERTOS;
+                    f32 Milliseconds = Elapsed * COUNTERTOMS;
+                    printf("Compilation ended: %f seconds\n", Seconds);
+                } else {
+                    fprintf(stderr, "ERROR: Failed to read start entry from file '%s'.\n", FileName);
+                }
+
+                fclose(Dest);
+
+                if (remove(Path) != 0) {
+                    fprintf(stderr, "ERROR: Failed to remove file '%s'.\n", FileName);
+                }
+            } else {
+                fprintf(stderr, "ERROR: Failed to open file '%s'.\n", FileName);
+            }
+        } else {
+            Usage(Args);
+        }
+    } else {
+        Usage(Args);
+    }
+
+    return 1;
+}
\ No newline at end of file
diff --git a/aetime.exe b/aetime.exe
new file mode 100644
index 00000000..9f922adf
Binary files /dev/null and b/aetime.exe differ
diff --git a/build.bat b/build.bat
new file mode 100644
index 00000000..0ad06015
--- /dev/null
+++ b/build.bat
@@ -0,0 +1,5 @@
+@echo off
+REM -Zi for debugging
+cl -nologo -FC -O2 -TC -EHsc aetime.c /link
+@if ERRORLEVEL 1 exit /B 1
+robocopy . ../ aetime.exe > nul
\ No newline at end of file