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🎥 Command line media player
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#include <assert.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <stdbool.h>#include <sys/types.h>#include <sys/stat.h>#include <errno.h>
#include "config.h"
#include "mpv_talloc.h"#include "common/common.h"#include "osdep/io.h"#include "misc/ctype.h"#include "misc/path_utils.h"
#if HAVE_DOS_PATHS#include <windows.h>#include <pathcch.h>#endif
bstr mp_basename_bstr(bstr path){ int separator_pos;
#if HAVE_DOS_PATHS if (!mp_is_url(path)) { separator_pos = bstrrchr(path, '\\'); if (separator_pos >= 0) path = bstr_splice(path, separator_pos + 1, path.len); separator_pos = bstrrchr(path, ':'); if (separator_pos >= 0) path = bstr_splice(path, separator_pos + 1, path.len); }#endif separator_pos = bstrrchr(path, '/'); if (separator_pos < 0) return path; return bstr_splice(path, separator_pos + 1, path.len);}
const char *mp_basename(const char *path){ return mp_basename_bstr(bstr0(path)).start;}
struct bstr mp_dirname(const char *path){ struct bstr ret = { (uint8_t *)path, mp_basename(path) - path }; if (ret.len == 0) return bstr0("."); return ret;}
#if HAVE_DOS_PATHSstatic const char mp_path_separators[] = "\\/";#elsestatic const char mp_path_separators[] = "/";#endif
// Mutates path and removes a trailing '/' (or '\' on Windows)void mp_path_strip_trailing_separator(char *path){ size_t len = strlen(path); if (len > 0 && strchr(mp_path_separators, path[len - 1])) path[len - 1] = '\0';}
/* Return the file extension, excluding the '.'. If root is not NULL, set it to * the part of the path without extension. So: path == root + "." + extension * Return NULL if there is no file extension and don't set *root in this case. */static bstr split_ext(bstr path, bstr *root){ bstr basename = mp_basename_bstr(path);
// Skip all leading dots, not just for "hidden" unix files, otherwise we // end up splitting a part of the filename sans leading dot. basename = bstr_splice(basename, bstrspn(basename, "."), basename.len);
int dot_pos = bstrrchr(basename, '.'); if (dot_pos < 0 || dot_pos == basename.len - 1) return (bstr){0}; bstr ext = bstr_splice(basename, dot_pos + 1, basename.len); if (root) *root = (bstr){path.start, ext.start - 1 - path.start}; return ext;}
bstr mp_strip_ext(bstr path){ bstr root = {0}; split_ext(path, &root); return root.len ? root : path;}
bstr mp_get_ext(bstr path){ return split_ext(path, NULL);}
bool mp_path_is_absolute(struct bstr path){ if (path.len && strchr(mp_path_separators, path.start[0])) return true;
#if HAVE_DOS_PATHS // Note: "X:filename" is a path relative to the current working directory // of drive X, and thus is not an absolute path. It needs to be // followed by \ or /. if (path.len >= 3 && path.start[1] == ':' && strchr(mp_path_separators, path.start[2])) return true;#endif
return false;}
char *mp_path_join_bstr(void *talloc_ctx, struct bstr p1, struct bstr p2){ if (p1.len == 0) return bstrdup0(talloc_ctx, p2); if (p2.len == 0) return bstrdup0(talloc_ctx, p1);
if (mp_path_is_absolute(p2)) return bstrdup0(talloc_ctx, p2);
bool have_separator = strchr(mp_path_separators, p1.start[p1.len - 1]);#if HAVE_DOS_PATHS // "X:" only => path relative to "X:" current working directory. if (p1.len == 2 && p1.start[1] == ':') have_separator = true;#endif
return talloc_asprintf(talloc_ctx, "%.*s%s%.*s", BSTR_P(p1), have_separator ? "" : "/", BSTR_P(p2));}
char *mp_path_join(void *talloc_ctx, const char *p1, const char *p2){ return mp_path_join_bstr(talloc_ctx, bstr0(p1), bstr0(p2));}
char *mp_getcwd(void *talloc_ctx){ char *e_wd = getenv("PWD"); if (e_wd) return talloc_strdup(talloc_ctx, e_wd);
char *wd = talloc_array(talloc_ctx, char, 20); while (getcwd(wd, talloc_get_size(wd)) == NULL) { if (errno != ERANGE) { talloc_free(wd); return NULL; } wd = talloc_realloc(talloc_ctx, wd, char, talloc_get_size(wd) * 2); } return wd;}
char *mp_normalize_path(void *talloc_ctx, const char *path){ if (!path) return NULL;
if (mp_is_url(bstr0(path)) || !strcmp(path, "-")) return talloc_strdup(talloc_ctx, path);
void *tmp = talloc_new(NULL); char *result;
if (!mp_path_is_absolute(bstr0(path))) { char *cwd = mp_getcwd(tmp); if (!cwd) { result = talloc_strdup(talloc_ctx, path); goto exit; } path = mp_path_join(tmp, cwd, path); }
#if HAVE_DOS_PATHS wchar_t *pathw = mp_from_utf8(tmp, path); wchar_t *read = pathw, *write = pathw; wchar_t prev = '\0'; // preserve leading double backslashes if (read[0] == '\\' && read[1] == '\\') { prev = '\\'; write += 2; read += 2; } wchar_t curr; while ((curr = *read)) { if (curr == '/') curr = '\\'; if (curr != '\\' || prev != '\\') *write++ = curr; prev = curr; read++; } *write = '\0'; size_t max_size = wcslen(pathw) + 1; wchar_t *pathc = talloc_array(tmp, wchar_t, max_size); HRESULT hr = PathCchCanonicalizeEx(pathc, max_size, pathw, PATHCCH_ALLOW_LONG_PATHS); result = SUCCEEDED(hr) ? mp_to_utf8(talloc_ctx, pathc) : talloc_strdup(talloc_ctx, path);#else result = talloc_strdup(tmp, ""); const char *next; const char *end = path + strlen(path);
for (const char *ptr = path; ptr < end; ptr = next + 1) { next = memchr(ptr, '/', end - ptr); if (next == NULL) next = end;
switch (next - ptr) { case 0: continue; case 1: if (ptr[0] == '.') continue; break; case 2: // Normalizing symlink/.. results in a wrong path: if the // current working directory is /tmp/foo, and it is a symlink to // /usr/bin, mpv ../file.mkv opens /usr/file.mkv, so we can't // normalize the path to /tmp/file.mkv. Resolve symlinks to fix // this. Otherwise we don't use realpath so users can use // symlinks e.g. to hide how media files are distributed over // real storage and move them while still resuming playback as // long as the symlinked path doesn't change. if (ptr[0] == '.' && ptr[1] == '.') { char *tmp_result = realpath(path, NULL); result = talloc_strdup(talloc_ctx, tmp_result ? tmp_result : path); free(tmp_result); goto exit; } }
result = talloc_strdup_append_buffer(result, "/"); result = talloc_strndup_append_buffer(result, ptr, next - ptr); }
result = talloc_steal(talloc_ctx, result);#endif
exit: talloc_free(tmp); return result;}
bool mp_path_exists(const char *path){ struct stat st; return path && stat(path, &st) == 0;}
bool mp_path_isdir(const char *path){ struct stat st; return stat(path, &st) == 0 && S_ISDIR(st.st_mode);}
// Return false if it's considered a normal local filesystem path.bool mp_is_url(bstr path){ int proto = bstr_find0(path, "://"); if (proto < 1) return false; // Per RFC3986, the first character of the protocol must be alphabetic. // The rest must be alphanumeric plus -, + and . for (int i = 0; i < proto; i++) { unsigned char c = path.start[i]; if ((i == 0 && !mp_isalpha(c)) || (!mp_isalnum(c) && c != '.' && c != '-' && c != '+')) { return false; } } return true;}
// Return the protocol part of path, e.g. "http" if path is "http://...".// On success, out_url (if not NULL) is set to the part after the "://".bstr mp_split_proto(bstr path, bstr *out_url){ if (!mp_is_url(path)) return (bstr){0}; bstr r; bstr_split_tok(path, "://", &r, out_url ? out_url : &(bstr){0}); return r;}
void mp_mkdirp(const char *dir){ if (mp_path_exists(dir)) return;
char *path = talloc_strdup(NULL, dir); char *cdir = path + 1;
while (cdir) { cdir = strchr(cdir, '/'); if (cdir) *cdir = 0;
mkdir(path, 0777);
if (cdir) *cdir++ = '/'; }
talloc_free(path);}