update

app.cpp

@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include "core.cpp"
+#include "core.h"
 
 int main(int argc, char **argv) {
     int statusCode = 0;
@@ -7,14 +8,23 @@ int main(int argc, char **argv) {
     Arena *arena = arenaAlloc(Megabytes(64));
     list<string> args = getArgs(arena, argc, argv);
 
-    log(strSplit(arena, strlit("-"), strlit("hallo-world")));
+    log(strSplit(arena, "-"_s, "hallo-world"_s));
 
     while (true) {
-        size_t arenaPos = arena->head;
-        string line = PushString(arena, 128);
-        fgets(line.str, (int)line.length, stdin);
-        log(strSplit(arena, strlit("-"), line));
-        arenaFreeFrom(arena, arenaPos);
+        string line;
+        list<string> split;
+
+        WithScratch(temp) {
+            line = PushString(temp.arena, 128);
+            fgets(line.str, (int)line.length, stdin);
+            split = strSplit(temp.arena, "-"_s, line);
+        }
+
+        if (line.str[0] == '\n' && line.str[1] == '\0') {
+            break;
+        } else {
+            log(split);
+        }
     }
 
     return statusCode;

build

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-gcc -g -g3 ./app.cpp -o ./target/app
+g++ -g -g3 -lm -DOS_LINUX=1 -DENABLE_ASSERT=1 ./app.cpp -o ./target/app

build.bat

@@ -5,7 +5,7 @@ if NOT EXIST .\target mkdir .\target
 set commonLinkerFlags=-opt:ref
 set commonCompilerFlags=^
     -MT                                                             %= Make sure the C runtime library is statically linked =%^
-    -Gm-                                                            %= Turns off incremently building =%^
+    -Gm-                                                            %= Turns off incremental building =%^
     -nologo                                                         %= No one cares you made the compiler Microsoft =%^
     -Oi                                                             %= Always use intrinsics  =%^
     -EHa-                                                           %= Disable exception handling =%^

core.cpp

@@ -1,6 +1,9 @@
+#include <unistd.h> // TODO(djledda): get outta here
+#include <math.h>
+#include <string.h>
 #define STB_SPRINTF_IMPLEMENTATION
 #include "core.h"
-#include "os.h"
+#include "os.cpp"
 
 void *pushSize(Arena *arena, size_t bytes) {
     if (arena->capacity - arena->head >= bytes) {
@@ -20,13 +23,7 @@ Arena *arenaAlloc(size_t capacity) {
 }
 
 void arenaFree(Arena *arena) {
-    os_free(arena);
-#if OS_WINDOWS 
-    VirtualFree(arena, NULL, MEM_RELEASE);
-#elif OS_LINUX
-    // TODO(dledda): implement this for Linux
-    Assert(false);
-#endif
+    os_free(arena, arena->capacity);
 }
 
 void arenaFreeFrom(Arena *arena, size_t position) {
@@ -60,6 +57,9 @@ Scratch scratchStart(Arena **conflicts, size_t conflictCount) {
     return scratch;
 }
 
+#define DeferLoop(begin_stmnt, end_stmnt) for(int __defer_i = ((begin_stmnt), 0); __defer_i < 1; (++__defer_i, (end_stmnt)))
+#define WithScratch(scratchName) Scratch scratchName; DeferLoop(scratchName = scratchStart(0, 0), scratchEnd(scratchName))
+
 void scratchEnd(Scratch scratch) {
     arenaFreeFrom(scratch.arena, scratch.start);
 }
@@ -86,6 +86,13 @@ void zeroList(list<T> *list) {
     memset(list->data, 0, list->head * sizeof(T));
 }
 
+inline string operator""_s(const char *cstrLiteral, unsigned long length) {
+    return {
+        (char *)cstrLiteral,
+        length,
+    };
+}
+
 const char *cstring(Arena *arena, list<char> buf) {
     char *arr = PushArray(arena, char, buf.length + 1);
     memmove(arr, buf.data, buf.length);
@@ -166,7 +173,7 @@ list<T> listSlice(list<T> l, size_t start, size_t stop) {
     if (stop == 0) {
         stop = l.head;
     }
-    // TODO(dledda): maybe assert instead
+    // TODO(djledda): maybe assert instead
     if (stop > l.head || start > stop) {
         return {0};
     }
@@ -181,7 +188,7 @@ string strSlice(string str, size_t start, size_t stop) {
     if (stop == 0) {
         stop = str.length;
     }
-    // TODO(dledda): maybe assert instead
+    // TODO(djledda): maybe assert instead
     if (stop > str.length || start > stop) {
         return {0};
     }
@@ -207,9 +214,9 @@ bool stringContains(string str, char c) {
     return false;
 }
 
-const char NUMERIC_CHARS[] = "0123456789";
+string NUMERIC_CHARS = "0123456789"_s;
 inline bool isNumeric(char c) {
-    return stringContains(strlit(NUMERIC_CHARS), c);
+    return stringContains(NUMERIC_CHARS, c);
 }
 
 list<string> strSplit(Arena *arena, string splitStr, string inputStr) {
@@ -317,17 +324,16 @@ string readEntireFile(Arena *arena, string filename) {
     struct stat st;
     stat((char *)filename.str, &st);
     size_t fsize = st.st_size;
-    string readBuffer = PushString(arena, filesize);
-    readBuffer.length = filesize;
-    fread(readBuffer.str, sizeof(byte), filesize, input);
+    string readBuffer = PushString(arena, fsize);
+    fread(readBuffer.str, sizeof(byte), readBuffer.length, input);
     fclose(input);
     return readBuffer;
 #endif
 }
 
 bool writeEntireFile(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
-#if OS_WINDOWS
     bool result = false;
+#if OS_WINDOWS
     HANDLE fileHandle = CreateFileA(cstring(arena, filename), GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, NULL, NULL);
     if (fileHandle != INVALID_HANDLE_VALUE) {
         DWORD bytesWritten;
@@ -337,15 +343,15 @@ bool writeEntireFile(Arena *arena, string filename, const byte *contents, size_t
         }  
         CloseHandle(fileHandle);
     }  
-    return result;
 #elif OS_LINUX
     Assert(false);
 #endif
+    return result;
 }
 
 bool fileAppend(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
-#if OS_WINDOWS
     bool result = false;
+#if OS_WINDOWS
     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;
@@ -356,10 +362,10 @@ bool fileAppend(Arena *arena, string filename, const byte *contents, size_t cont
         }
         CloseHandle(fileHandle);
     }
-    return result;
 #elif OS_LINUX
     Assert(false);
 #endif
+    return result;
 }
 
 list<string> getArgs(Arena *arena, int argc, char **argv) {
@@ -382,7 +388,7 @@ Timestamp timestampFromUnixTime(UnixTimestamp *unixTimestamp) {
 }
 
 string formatTimeHms(Arena *arena, UnixTimestamp time) {
-    local_persist const string format = strlit("HH-MM-SS");
+    local_persist const string format = "HH-MM-SS"_s;
     string buf = PushString(arena, format.length);
     tm *timestamp = gmtime((time_t *)&time);
     strftime(buf.str, buf.length + 1, "%T", timestamp);
@@ -390,14 +396,14 @@ string formatTimeHms(Arena *arena, UnixTimestamp time) {
 }
 
 string formatTimeHms(Arena *arena, Timestamp *time) {
-    local_persist const string format = strlit("HH-MM-SS");
+    local_persist const string format = "HH-MM-SS"_s;
     string buf = PushString(arena, format.length);
     strftime(buf.str, buf.length + 1, "%T", (tm *)time);
     return buf;
 }
 
 string formatTimeYmd(Arena *arena, UnixTimestamp time) {
-    local_persist const string format = strlit("YYYY-mm-dd");
+    local_persist const string format = "YYYY-mm-dd"_s;
     string buf = PushString(arena, format.length);
     tm *timestamp = gmtime((time_t *)&time);
     strftime(buf.str, buf.length + 1, "%Y-%m-%d", timestamp);
@@ -405,7 +411,7 @@ string formatTimeYmd(Arena *arena, UnixTimestamp time) {
 }
 
 string formatTimeYmd(Arena *arena, Timestamp *time) {
-    local_persist const string format = strlit("YYYY-mm-dd");
+    local_persist const string format = "YYYY-mm-dd"_s;
     string buf = PushString(arena, format.length);
     strftime(buf.str, buf.length + 1, "%Y-%m-%d", (tm *)time);
     return buf;
@@ -433,8 +439,21 @@ function void __core_log(LogTarget target, const char *fmt, va_list argList) {
     }
     WriteFile(stdHandle, result.str, (DWORD)result.length, &done, 0);
 #elif OS_LINUX
-    // TODO(dledda): implementation
-    Assert(false);
+    // TODO(djledda): finish implementation without cstdlib
+    switch (target) {
+        case LogTarget_stdin: 
+            write(0, (const void *)result.str, result.length);
+            break;
+        case LogTarget_stderr: 
+            fflush(stderr);
+            write(2, (const void *)result.str, result.length);
+            break;
+        case LogTarget_stdout: 
+        default:
+            fflush(stdout);
+            write(1, (const void *)result.str, result.length);
+            break;
+    }
 #endif
     scratchEnd(scratch);
 }

core.h

@@ -5,7 +5,7 @@
 #include <math.h>
 #include <stdint.h> // necessary for int type sizes
 #include <stdio.h>
-#include <time.h> // TODO(dledda): try not to depend on this one
+#include <time.h> // TODO(djledda): try not to depend on this one
 
 // ### Misc macros ### 
 #if ENABLE_ASSERT
@@ -150,6 +150,7 @@ struct string {
 
 #define strlit(lit) (string{(char *)(lit), sizeof(lit) - 1})
 #define PushString(arena, length) (string{ (char *)pushSize(arena, length), (length) })
+string operator""_s(const char *cstrLiteral, unsigned long length);
 
 // C Strings
 const char *cstring(Arena *arena, list<char> buf); 
@@ -192,7 +193,7 @@ string formatTimeYmd(Arena *arena, UnixTimestamp time);
 string formatTimeYmd(Arena *arena, Timestamp *time); 
 
 // ### Linked Lists ###
-// TODO(dledda): implement basic linked lists (based on arenas?)
+// TODO(djledda): implement basic linked lists (based on arenas?)
 
 // ### Logging ###
 enum LogTarget {

os.h

@@ -7,6 +7,6 @@
 void *os_alloc(size_t capacity);
 void os_reserve(void *ptr);
 void os_decommit(void *ptr);
-void os_free(void *ptr);
+void os_free(void *ptr, size_t freeSize);
 
 #endif

os_linux.cpp

@@ -1,21 +1,24 @@
 #ifndef OS_IMPL_LINUX_CPP
 #define OS_IMPL_LINUX_CPP
 
+#include "os.h"
+
 #include <sys/mman.h>
 #include <sys/stat.h>
-#include "os.h"
 
 void *os_alloc(size_t capacity) {
     return mmap(0, capacity, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 }
 
-void os_reserve(void *ptr) {
+void os_commit(void *ptr) {
 }
 
 void os_decommit(void *ptr) {
 }
 
-void os_free(void *ptr) {
+void os_free(void *ptr, size_t size) {
+    int err = munmap(ptr, size);
+    Assert(err != -1);
 }
 
 #endif

os_win32.cpp

@@ -4,17 +4,18 @@
 #include "os.h"
 #include "Windows.h" 
 
-void *osAlloc(size_t capacity) {
-    return VirtualAlloc(NULL, sizeof(Arena) + capacity, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
+void *os_alloc(size_t commitSize) {
+    return VirtualAlloc(NULL, commitSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
 }
 
-void osReserve(void *ptr) {
+void os_reserve(void *ptr) {
 }
 
-void osDecommit(void *ptr) {
+void os_decommit(void *ptr) {
 }
 
-void osFree(void *ptr) {
+void os_free(void *ptr, size_t size) {
+    VirtualFree(ptr, NULL, MEM_RELEASE);
 }
 
 #endif 

vendor/stb_sprintf.h

@@ -603,6 +603,7 @@ STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(vsprintfcb)(STBSP_SPRINTFCB *callback,
          goto scopy;
 
        case 'S': 
+       {
          // string struct
          string str = va_arg(va, string);
          s = (char *)str.str;
@@ -614,6 +615,7 @@ STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(vsprintfcb)(STBSP_SPRINTFCB *callback,
          dp = 0;
          cs = 0;
          goto scopy;
+      } break;
 
       case 'c': // char
          // get the character