From f6d3090f7fa76eb8e0dbe060b8490cb49c001c39 Mon Sep 17 00:00:00 2001
From: nasr <nsrddyn@gmail.com>
Date: Mon, 5 Oct 2026 22:02:56 +0200
Subject: init: base

---
 source/base/base_platform_linux.cpp | 189 ++++++++++++++++++++++++++++++++++++
 1 file changed, 189 insertions(+)
 create mode 100644 source/base/base_platform_linux.cpp

(limited to 'source/base/base_platform_linux.cpp')

diff --git a/source/base/base_platform_linux.cpp b/source/base/base_platform_linux.cpp
new file mode 100644
index 0000000..8fb190a
--- /dev/null
+++ b/source/base/base_platform_linux.cpp
@@ -0,0 +1,189 @@
+
+internal String8 unix_get_env(const char *var) {
+
+    AssertLog(environ, "Environment not loaded");
+
+    String8 buffer = {0};
+    u64 index = 0;
+    char *current = environ[index];
+    while(environ[index] != NULL) {
+        if(CstringAnyMatch(environ[index], var)) {
+            String8 buffer = str8(environ[index]);
+
+            u64 equal_sign_pos = 0;
+            b32 found_equal_sign = str8_find(&buffer, 0, str8("="), &equal_sign_pos);
+
+            if(equal_sign_pos) {
+                buffer = str8_chop_left(buffer, equal_sign_pos);
+            }
+
+
+        } else {
+            Assert(0);
+        }
+        ++index;
+    }
+    return buffer;
+
+
+}
+
+
+
+//-
+internal void unix_load_shared_library(MemArena *arena, SharedLibrary *library) {
+
+    void *data = dlopen(library->name, RTLD_LAZY | RTLD_LOCAL);
+    AssertLog(data, "failed to load shared object %s", library->name); // Assert and print the error that get's reported to dlerror
+    library->mem = data;
+}
+
+internal void *unix_shared_library_get_proc_from_name(SharedLibrary *library, const char *name)
+{
+    void *symbol = dlsym(library->mem, name);
+    return symbol;
+}
+
+internal int unix_shared_library_close(SharedLibrary *library)
+{
+    int result = dlclose(library);
+    AssertLog(result, "failed to close the library");
+
+    return result;
+}
+
+//- implementations
+internal b32 unix_file_exists(String8 path) { return access((const char *)path.data, F_OK) == 0; }
+
+internal b32 unix_relative_path(MemArena *arena, String8 *path) {
+
+    String8 forward_slash = str8("./");
+    b32 insertion_result = str8_insert(arena, path, &forward_slash, 0);
+    if(!insertion_result) {
+        breakpoint();
+    }
+    return insertion_result;
+
+}
+
+internal String8 unix_file_load(MemArena *arena, String8 path)
+{
+    if (path.size <= 0) {
+        Log("Can't find the file we we're supposed to open. This is an issue because we we're supposed to break way earlier");
+        return {};
+    }
+
+    String8 result   = {0};
+    struct stat sbuf = {0};
+
+    if (!path.data) {
+        Log("Invalid path file");
+        return str8_zero();
+    }
+
+
+    const char *null_terminated_path = null_terminate(arena, &path);
+
+    s32 file = open(null_terminated_path, O_RDONLY);
+    if (file == -1) {
+        Log("An error occurred. File was not loaded. error code: ", Str8Fmt , Str8Arg(path));
+        return str8_zero();
+    }
+
+    if (fstat(file, &sbuf) == -1) {
+        close(file);
+        return str8_zero();
+    }
+
+    result      = PushString8(arena, (u64)sbuf.st_size);
+
+    u64 file_size =  (u64)sbuf.st_size;
+    result.size = file_size;
+
+    u64 total_bytes_read = 0;
+
+    while(total_bytes_read < file_size) {
+
+        s64 bytes = read(file, result.data + total_bytes_read, file_size - total_bytes_read);
+        if (bytes == -1) {
+            Log("Failed, reading file was interrupted");
+            return str8_zero();
+        }
+
+        if(bytes == 0) break;
+        total_bytes_read += (u64)bytes;
+    }
+
+    result.size = total_bytes_read;
+
+    close(file);
+    return result;
+}
+
+// TODO: why was this returning a str8 before?
+internal b32 unix_file_write(String8 data, String8 path)
+{
+    s32 file       = open((const char *)path.data, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+    if (file == -1) {
+        return false;
+    }
+
+    u64 written = 0;
+    while (written < data.size) {
+        s64 err = write(file, data.data + written, data.size - written);
+        if (err == -1) {
+            close(file);
+            return false;
+        }
+        written += err;
+    }
+
+    close(file);
+    return true;
+}
+
+internal void unix_log_with_args(const char *format, ...)
+{
+    va_list arguments;
+    va_start(arguments, format);
+    vprintf(format, arguments);
+    fflush(stdout);
+    va_end(arguments);
+}
+
+internal void unix_os_exit() { _exit(0); }
+
+// TODO: rewrite this
+internal String8List *unix_open_dir(MemArena *arena, String8 *path)
+{
+    String8List *files_list = PushStructZero(arena, String8List);
+    files_list->first       = &nil_str8_node;
+    files_list->last        = &nil_str8_node;
+
+    cstring cpath = null_terminate(arena, path);
+    DIR *dir     = opendir(cpath);
+    if (!dir) {
+        Log("opendir(%s) failed\n", cpath);
+        return files_list;
+    }
+
+    struct dirent *entry;
+    while ((entry = readdir(dir)) != NULL) {
+        if (entry->d_type != DT_REG) { // TODO: should symbolic files be handles aswell?
+            continue;
+        }
+
+        String8 name           = str8(entry->d_name);
+        String8Node *file_node = PushStruct(arena, String8Node);
+        *file_node             = ToString8Node(str8_clone(arena, &name));
+        str8_list_push_node(files_list, file_node);
+    }
+
+    FOR_STR8_NODE(files_list, current) {
+        Log("Logging files names");
+        LogStr8(current->value);
+    }
+
+    closedir(dir);
+    return files_list;
+}
\ No newline at end of file
-- 
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