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Copy pathpath.cpp
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517 lines (410 loc) · 12.5 KB
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189<
8000
/div>
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/*
Path handling utilities.
*/
#if !defined(GB_SYSTEM_WINDOWS)
#include <unistd.h>
#endif
gb_internal String remove_extension_from_path(String const &s) {
if (s.len != 0 && s.text[s.len-1] == '.') {
return s;
}
for (isize i = s.len-1; i >= 0; i--) {
if (s[i] == '.') {
return substring(s, 0, i);
}
}
return s;
}
gb_internal String remove_directory_from_path(String const &s) {
isize len = 0;
for (isize i = s.len-1; i >= 0; i--) {
if (s[i] == '/' ||
s[i] == '\\') {
break;
}
len += 1;
}
return substring(s, s.len-len, s.len);
}
#if defined(GB_SYSTEM_WINDOWS)
gb_global SRWLOCK cwd_lock;
String get_working_directory(gbAllocator allocator) {
AcquireSRWLockExclusive(&cwd_lock);
TEMPORARY_ALLOCATOR_GUARD();
DWORD sz_utf16 = GetCurrentDirectoryW(0, nullptr);
wchar_t *dir_buf_wstr = gb_alloc_array(temporary_allocator(), wchar_t, sz_utf16);
if (dir_buf_wstr == nullptr) {
ReleaseSRWLockExclusive(&cwd_lock);
return {};
}
DWORD n = GetCurrentDirectoryW(sz_utf16, dir_buf_wstr);
GB_ASSERT(n+1 == sz_utf16);
ReleaseSRWLockExclusive(&cwd_lock);
isize buf_len = sz_utf16*4;
u8 *buf = gb_alloc_array(allocator, u8, buf_len);
gb_ucs2_to_utf8(buf, buf_len, cast(u16 *)dir_buf_wstr);
return make_string_c(cast(char const *)buf);
}
bool set_working_directory(String dir) {
bool ok = false;
TEMPORARY_ALLOCATOR_GUARD();
char const *cdir = alloc_cstring(temporary_allocator(), dir);
wchar_t *wstr = gb__alloc_utf8_to_ucs2(temporary_allocator(), cdir, nullptr);
AcquireSRWLockExclusive(&cwd_lock);
ok = SetCurrentDirectoryW(wstr);
ReleaseSRWLockExclusive(&cwd_lock);
return ok;
}
#else
String get_working_directory(gbAllocator allocator) {
TEMPORARY_ALLOCATOR_GUARD();
auto buf = array_make<char>(temporary_allocator());
size_t size = PATH_MAX;
char const *cwd = nullptr;
for (; cwd == nullptr; size *= 2) {
array_resize(&buf, size);
cwd = getcwd(buf.data, buf.count);
if (cwd == nullptr && errno != ERANGE) {
return {};
}
}
return copy_string(allocator, make_string_c(cwd));
}
bool set_working_directory(String dir) {
TEMPORARY_ALLOCATOR_GUARD();
char const *cdir = alloc_cstring(temporary_allocator(), dir);
return !chdir(cdir);
}
#endif
gb_internal bool path_is_directory(String path);
gb_internal String directory_from_path(String const &s) {
if (path_is_directory(s)) {
return s;
}
isize i = s.len-1;
for (; i >= 0; i--) {
if (s[i] == '/' ||
s[i] == '\\') {
break;
}
}
if (i >= 0) {
return substring(s, 0, i);
}
return substring(s, 0, 0);
}
#if defined(GB_SYSTEM_WINDOWS)<
8000
/div>
gb_internal bool path_is_directory(String path) {
gbAllocator a = heap_allocator();
String16 wstr = string_to_string16(a, path);
defer (gb_free(a, wstr.text));
i32 attribs = GetFileAttributesW(cast(wchar_t *)wstr.text);
if (attribs < 0) return false;
return (attribs & FILE_ATTRIBUTE_DIRECTORY) != 0;
}
#else
gb_internal bool path_is_directory(String path) {
gbAllocator a = heap_allocator();
char *copy = cast(char *)copy_string(a, path).text;
defer (gb_free(a, copy));
struct stat s;
if (stat(copy, &s) == 0) {
return (s.st_mode & S_IFDIR) != 0;
}
return false;
}
#endif
gb_internal String path_to_full_path(gbAllocator a, String path) {
gbAllocator ha = heap_allocator();
char *path_c = gb_alloc_str_len(ha, cast(char *)path.text, path.len);
defer (gb_free(ha, path_c));
char *fullpath = gb_path_get_full_name(a, path_c);
String res = string_trim_whitespace(make_string_c(fullpath));
#if defined(GB_SYSTEM_WINDOWS)
for (isize i = 0; i < res.len; i++) {
if (res.text[i] == '\\') {
res.text[i] = '/';
}
}
#endif
return copy_string(a, res);
}
struct Path {
String basename;
String name;
String ext;
};
// NOTE(Jeroen): Naively turns a Path into a string.
gb_internal String path_to_string(gbAllocator a, Path path) {
if (path.basename.len + path.name.len + path.ext.len == 0) {
return make_string(nullptr, 0);
}
isize len = path.basename.len + 1 + path.name.len + 1;
if (path.ext.len > 0) {
len += path.ext.len + 1;
}
u8 *str = gb_alloc_array(a, u8, len);
isize i = 0;
gb_memmove(str+i, path.basename.text, path.basename.len); i += path.basename.len;
gb_memmove(str+i, "/", 1); i += 1;
gb_memmove(str+i, path.name.text, path.name.len); i += path.name.len;
if (path.ext.len > 0) {
gb_memmove(str+i, ".", 1); i += 1;
gb_memmove(str+i, path.ext.text, path.ext.len); i += path.ext.len;
}
str[i] = 0;
String res = make_string(str, i);
res = string_trim_whitespace(res);
return res;
}
gb_internal String quote_path(gbAllocator a, Path path) {
String temp = path_to_string(a, path);
String quoted = concatenate3_strings(a, str_lit("\""), temp, str_lit("\""));
gb_free(a, temp.text);
return quoted;
}
// NOTE(Jeroen): Naively turns a Path into a string, then normalizes it using `path_to_full_path`.
gb_internal String path_to_full_path(gbAllocator a, Path path) {
String temp = path_to_string(heap_allocator(), path);
defer (gb_free(heap_allocator(), temp.text));
return path_to_full_path(a, temp);
}
// NOTE(Jeroen): Takes a path like "odin" or "W:\Odin", turns it into a full path,
// and then breaks it into its components to make a Path.
gb_internal Path path_from_string(gbAllocator a, String const &path) {
Path res = {};
if (path.len == 0) return res;
String fullpath = path_to_full_path(a, path);
defer (gb_free(heap_allocator(), fullpath.text));
res.basename = directory_from_path(fullpath);
res.basename = copy_string(a, res.basename);
if (path_is_directory(fullpath)) {
// It's a directory. We don't need to tinker with the name and extension.
// It could have a superfluous trailing `/`. Remove it if so.
if (res.basename.len > 0 && res.basename.text[res.basename.len - 1] == '/') {
res.basename.len--;
}
return res;
}
// Note(Dragos): Is the copy_string required if it's a substring?
isize name_start = (res.basename.len > 0) ? res.basename.len + 1 : res.basename.len;
res.name = substring(fullpath, name_start, fullpath.len);
res.name = remove_extension_from_path(res.name);
res.name = copy_string(a, res.name);
res.ext = path_extension(fullpath, false); // false says not to include the dot.
res.ext = copy_string(a, res.ext);
return res;
}
// NOTE(Jeroen): Takes a path String and returns the last path element.
gb_internal String last_path_element(String const &path) {
isize count = 0;
u8 * start = (u8 *)(&path.text[path.len - 1]);
for (isize length = path.len; length > 0 && path.text[length - 1] != '/'; length--) {
count++;
start--;
}
if (count > 0) {
start++; // Advance past the `/` and return the substring.
String res = make_string(start, count);
return res;
}
// Must be a root path like `/` or `C:/`, return empty String.
return STR_LIT("");
}
gb_internal bool path_is_directory(Path path) {
String path_string = path_to_full_path(heap_allocator(), path);
defer (gb_free(heap_allocator(), path_string.text));
return path_is_directory(path_string);
}
struct FileInfo {
String name;
String fullpath;
i64 size;
bool is_dir;
};
enum ReadDirectoryError {
ReadDirectory_None,
ReadDirectory_InvalidPath,
ReadDirectory_NotExists,
ReadDirectory_Permission,
ReadDirectory_NotDir,
ReadDirectory_Empty,
ReadDirectory_Unknown,
ReadDirectory_COUNT,
};
gb_internal i64 get_file_size(String path) {
char *c_str = alloc_cstring(heap_allocator(), path);
defer (gb_free(heap_allocator(), c_str));
gbFile f = {};
gbFileError err = gb_file_open(&f, c_str);
defer (gb_file_close(&f));
if (err != gbFileError_None) {
return -1;
}
return gb_file_size(&f);
}
#if defined(GB_SYSTEM_WINDOWS)
gb_internal ReadDirectoryError read_directory(String path, Array<FileInfo> *fi) {
GB_ASSERT(fi != nullptr);
while (path.len > 0) {
Rune end = path[path.len-1];
if (end == '/') {
path.len -= 1;
} else if (end == '\\') {
path.len -= 1;
} else {
break;
}
}
if (path.len == 0) {
return ReadDirectory_InvalidPath;
}
{
char *c_str = alloc_cstring(temporary_allocator(), path);
gbFile f = {};
gbFileError file_err = gb_file_open(&f, c_str);
defer (gb_file_close(&f));
switch (file_err) {
case gbFileError_Invalid: return ReadDirectory_InvalidPath;
case gbFileError_NotExists: return ReadDirectory_NotExists;
// case gbFileError_Permission: return ReadDirectory_Permission;
}
}
if (!path_is_directory(path)) {
return ReadDirectory_NotDir;
}
gbAllocator a = heap_allocator();
char *new_path = gb_alloc_array(a, char, path.len+3);
defer (gb_free(a, new_path));
gb_memmove(new_path, path.text, path.len);
gb_memmove(new_path+path.len, "/*", 2);
new_path[path.len+2] = 0;
String np = make_string(cast(u8 *)new_path, path.len+2);
String16 wstr = string_to_string16(a, np);
defer (gb_free(a, wstr.text));
WIN32_FIND_DATAW file_data = {};
HANDLE find_file = FindFirstFileW(cast(wchar_t *)wstr.text, &file_data);
if (find_file == INVALID_HANDLE_VALUE) {
return ReadDirectory_Unknown;
}
defer (FindClose(find_file));
array_init(fi, a, 0, 100);
do {
wchar_t *filename_w = file_data.cFileName;
u64 size = cast(u64)file_data.nFileSizeLow;
size |= (cast(u64)file_data.nFileSizeHigh) << 32;
String name = string16_to_string(a, make_string16_c(cast(u16 *)filename_w));
if (name == "." || name == "..") {
gb_free(a, name.text);
continue;
}
String filepath = {};
filepath.len = path.len+1+name.len;
filepath.text = gb_alloc_array(a, u8, filepath.len+1);
defer (gb_free(a, filepath.text));
gb_memmove(filepath.text, path.text, path.len);
gb_memmove(filepath.text+path.len, "/", 1);
gb_memmove(filepath.text+path.len+1, name.text, name.len);
FileInfo info = {};
info.name = name;
info.fullpath = path_to_full_path(a, filepath);
info.size = cast(i64)size;
info.is_dir = (file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
array_add(fi, info);
} while (FindNextFileW(find_file, &file_data));
if (fi->count == 0) {
return ReadDirectory_Empty;
}
return ReadDirectory_None;
}
#elif defined(GB_SYSTEM_LINUX) || defined(GB_SYSTEM_OSX) || defined(GB_SYSTEM_FREEBSD) || defined(GB_SYSTEM_OPENBSD) || defined(GB_SYSTEM_NETBSD) || defined(GB_SYSTEM_HAIKU)
#include <dirent.h>
gb_internal ReadDirectoryError read_directory(String path, Array<FileInfo> *fi) {
GB_ASSERT(fi != nullptr);
gbAllocator a = heap_allocator();
char *c_path = alloc_cstring(a, path);
defer (gb_free(a, c_path));
DIR *dir = opendir(c_path);
if (!dir) {
switch (errno) {
case ENOENT:
return ReadDirectory_NotExists;
case EACCES:
return ReadDirectory_Permission;
case ENOTDIR:
return ReadDirectory_NotDir;
default:
// ENOMEM: out of memory
// EMFILE: per-process limit on open fds reached
// ENFILE: system-wide limit on total open files reached
return ReadDirectory_Unknown;
}
GB_PANIC("unreachable");
}
array_init(fi, a, 0, 100);
for (;;) {
struct dirent *entry = readdir(dir);
if (entry == nullptr) {
break;
}
String name = make_string_c(entry->d_name);
if (name == "." || name == "..") {
continue;
}
String filepath = {};
filepath.len = path.len+1+name.len;
filepath.text = gb_alloc_array(a, u8, filepath.len+1);
defer (gb_free(a, filepath.text));
gb_memmove(filepath.text, path.text, path.len);
gb_memmove(filepath.text+path.len, "/", 1);
gb_memmove(filepath.text+path.len+1, name.text, name.len);
filepath.text[filepath.len] = 0;
struct stat dir_stat = {};
if (stat((char *)filepath.text, &dir_stat)) {
continue;
}
i64 size = dir_stat.st_size;
FileInfo info = {};
info.name = copy_string(a, name);
info.fullpath = path_to_full_path(a, filepath);
info.size = size;
info.is_dir = S_ISDIR(dir_stat.st_mode);
array_add(fi, info);
}
if (fi->count == 0) {
return ReadDirectory_Empty;
}
return ReadDirectory_None;
}
#else
#error Implement read_directory
#endif
#if !defined(GB_SYSTEM_WINDOWS)
gb_internal bool write_directory(String path) {
char const *pathname = (char *) path.text;
if (access(pathname, W_OK) < 0) {
return false;
}
return true;
}
#else
gb_internal bool write_directory(String path) {
String16 wstr = string_to_string16(heap_allocator(), path);
LPCWSTR wdirectory_name = cast(wchar_t *)wstr.text;
HANDLE directory = CreateFileW(wdirectory_name,
GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS,
NULL);
if (directory == INVALID_HANDLE_VALUE) {
DWORD error_code = GetLastError();
if (error_code == ERROR_ACCESS_DENIED) {
return false;
}
}
CloseHandle(directory);
return true;
}
#endif
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