meta: rename io module to fx.io namespace

fx.io/sys/windows/path.c

@@ -0,0 +1,248 @@
+#define WIN32_LEAN_AND_MEAN
+
+#include <fx/core/stringstream.h>
+#include <fx/io/path.h>
+#include <fx/ds/string.h>
+#include <Windows.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+struct fx_path {
+	struct fx_dsref base;
+	struct fx_string *pathstr;
+};
+
+static void path_release(struct fx_dsref *obj);
+static void path_to_string(struct fx_dsref *obj, struct fx_stringstream *out);
+
+static struct fx_dsref_type path_type = {
+	.t_name = "corelib::path",
+	.t_flags = FX_DSREF_FUNDAMENTAL,
+	.t_id = FX_DSREF_TYPE_PATH,
+	.t_instance_size = sizeof(struct fx_path),
+	.t_release = path_release,
+	.t_to_string = path_to_string,
+};
+
+struct fx_path *fx_path_create()
+{
+	struct fx_path *path
+		= (struct fx_path *)fx_dsref_type_instantiate(&path_type);
+	if (!path) {
+		return NULL;
+	}
+
+	path->pathstr = fx_string_create();
+	if (!path->pathstr) {
+		fx_path_release(path);
+		return NULL;
+	}
+
+	return path;
+}
+
+struct fx_path *fx_path_create_root()
+{
+	const char *system_drive = getenv("SystemDrive");
+	if (!system_drive) {
+		/* take an educated guess. */
+		system_drive = "C:";
+	}
+
+	size_t system_drive_len = strlen(system_drive);
+
+	struct fx_path *path = fx_path_create();
+	if (!path) {
+		return NULL;
+	}
+
+	fx_string_append_cstr(path->pathstr, system_drive);
+	if (system_drive[system_drive_len - 1] != '\\') {
+		fx_string_append_cstr(path->pathstr, "\\");
+	}
+
+	return path;
+}
+
+struct fx_path *fx_path_create_cwd()
+{
+	DWORD cwd_len = GetCurrentDirectory(0, NULL);
+	if (cwd_len == 0) {
+		return NULL;
+	}
+
+	TCHAR *cwd_buf = malloc(cwd_len + 1);
+	if (!cwd_buf) {
+		return NULL;
+	}
+
+	cwd_len = GetCurrentDirectory(cwd_len + 1, cwd_buf);
+	if (cwd_len == 0) {
+		free(cwd_buf);
+		return NULL;
+	}
+
+	struct fx_path *path = fx_path_create();
+	if (!path) {
+		return NULL;
+	}
+
+	for (DWORD i = 0; i < cwd_len; i++) {
+		TCHAR c = cwd_buf[i];
+		char s[] = {(c >= 128 ? '?' : (char)c), 0};
+		fx_string_append_cstr(path->pathstr, s);
+	}
+
+	free(cwd_buf);
+	return path;
+}
+
+struct fx_path *fx_path_create_from_cstr(const char *cstr)
+{
+	struct fx_path *path = fx_path_create();
+	if (!path) {
+		return NULL;
+	}
+
+	char prev = 0;
+
+	for (size_t i = 0; cstr[i]; i++) {
+		char c = cstr[i];
+		if (c == '\\') {
+			c = '/';
+		}
+
+		if (prev == '/' && c == '/') {
+			continue;
+		}
+
+
+		char s[] = {c, 0};
+		fx_string_append_cstr(path->pathstr, s);
+		prev = c;
+	}
+
+	while (fx_string_get_last_char(path->pathstr) == '/') {
+		fx_string_pop_back(path->pathstr);
+	}
+
+	return path;
+}
+
+static void append_path(struct fx_path *dest, const struct fx_path *src)
+{
+	if (fx_path_is_absolute(src)) {
+		fx_string_clear(dest->pathstr);
+		fx_string_append_s(dest->pathstr, src->pathstr);
+		return;
+	}
+
+	if (fx_string_get_last_char(dest->pathstr) != '/'
+	    && fx_string_get_first_char(src->pathstr) != '/') {
+		char s[] = {'/', 0};
+		fx_string_append_cstr(dest->pathstr, s);
+	}
+
+	fx_string_append_s(dest->pathstr, src->pathstr);
+}
+
+struct fx_path *fx_path_join(
+	const fx_path *paths[], size_t nr_paths)
+{
+	struct fx_path *result = fx_path_create();
+	if (!result) {
+		return NULL;
+	}
+
+	for (size_t i = 0; i < nr_paths; i++) {
+		if (paths[i]) {
+			append_path(result, paths[i]);
+		}
+	}
+
+	return result;
+}
+
+struct fx_path *fx_path_make_absolute(const struct fx_path *in)
+{
+	return NULL;
+}
+
+struct fx_path *fx_path_make_relative(const struct fx_path *in)
+{
+	return NULL;
+}
+
+struct fx_path *fx_path_make_canonical(const struct fx_path *in)
+{
+	return NULL;
+}
+
+bool fx_path_is_absolute(const struct fx_path *path)
+{
+	const char *s = fx_string_get_cstr(path->pathstr);
+
+	size_t i;
+	for (i = 0; s[i]; i++) {
+		char c = s[i];
+
+		if (!isalpha(c)) {
+			break;
+		}
+	}
+
+	if (s[i++] != ':') {
+		return false;
+	}
+
+	if (s[i++] != '/') {
+		return false;
+	}
+
+	return true;
+}
+
+bool fx_path_exists(const struct fx_path *path)
+{
+	DWORD attrib = GetFileAttributesA(fx_path_ptr(path));
+	return attrib != INVALID_FILE_ATTRIBUTES;
+}
+
+bool fx_path_is_file(const struct fx_path *path)
+{
+	DWORD attrib = GetFileAttributesA(fx_path_ptr(path));
+	if (attrib == INVALID_FILE_ATTRIBUTES) {
+		return false;
+	}
+
+	return (attrib & FILE_ATTRIBUTE_NORMAL) != 0;
+}
+
+bool fx_path_is_directory(const struct fx_path *path)
+{
+	DWORD attrib = GetFileAttributesA(fx_path_ptr(path));
+	if (attrib == INVALID_FILE_ATTRIBUTES) {
+		return false;
+	}
+
+	return (attrib & FILE_ATTRIBUTE_DIRECTORY) != 0;
+}
+
+const char *fx_path_ptr(const struct fx_path *path)
+{
+	return fx_string_get_cstr(path->pathstr);
+}
+
+void path_release(struct fx_dsref* obj)
+{
+	struct fx_path *path = FX_PATH(obj);
+	fx_string_release(path->pathstr);
+}
+
+void path_to_string(struct fx_dsref* obj, struct fx_stringstream* out)
+{
+	struct fx_path *path = (struct fx_path *)obj;
+
+	fx_stringstream_add(out, fx_string_get_cstr(path->pathstr));
+}