update

os_linux.cpp

@@ -5,6 +5,7 @@
 
 #include <sys/mman.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
 void *os_alloc(size_t capacity) {
     return mmap(0, capacity, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
@@ -21,4 +22,77 @@ void os_free(void *ptr, size_t size) {
     Assert(err != -1);
 }
 
+string os_readEntireFile(Arena *arena, string filename) {
+    Scratch temp = scratchStart(&arena, 1);
+
+    FILE *input = fopen(cstring(temp.arena, filename), "r");
+    string readBuffer;
+    if (input) {
+        struct stat st;
+        stat((char *)filename.str, &st);
+        size_t fsize = st.st_size;
+        readBuffer = PushString(arena, fsize);
+        fread(readBuffer.str, sizeof(byte), readBuffer.length, input);
+        fclose(input);
+    } else {
+        readBuffer = PushString(arena, 0);
+    }
+
+    scratchEnd(temp);
+    return readBuffer;
+}
+
+bool os_writeEntireFile(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
+    Scratch temp = scratchStart(&arena, 1);
+
+    bool result = false;
+    FILE *output = fopen(cstring(temp.arena, filename), "w");
+    if (output) {
+        fwrite(contents, sizeof(byte), contentsLength, output);
+        fclose(output);
+        result = true;
+    }
+
+    scratchEnd(temp);
+    return result;
+}
+
+bool os_fileAppend(Arena *arena, string filename, const byte *contents, size_t contentsLength) {
+    Scratch temp = scratchStart(&arena, 1);
+
+    bool result = false;
+    FILE *output = fopen(cstring(temp.arena, filename), "a");
+    if (output) {
+        fwrite(contents, sizeof(byte), contentsLength, output);
+        fclose(output);
+        result = true;
+    }
+
+    scratchEnd(temp);
+    return result;
+}
+
+void os_log(LogTarget target, const char *fmt, va_list argList) {
+    Scratch temp = scratchStart(0, 0);
+
+    string result = strPrintfv(temp.arena, fmt, argList);
+    // 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;
+    }
+
+    scratchEnd(temp);
+}
+
 #endif