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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;
}
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