src/util/path.h
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #ifndef UTIL_PATH_H | ||
| 2 | #define UTIL_PATH_H | ||
| 3 | |||
| 4 | #include <stdbool.h> | ||
| 5 | #include <stddef.h> | ||
| 6 | #include <string.h> | ||
| 7 | #include "debug.h" | ||
| 8 | #include "macros.h" | ||
| 9 | #include "string-view.h" | ||
| 10 | #include "xmalloc.h" | ||
| 11 | |||
| 12 | NONNULL_ARGS | ||
| 13 | 323 | static inline bool path_is_absolute(const char *path) | |
| 14 | { | ||
| 15 | 323 | return path[0] == '/'; | |
| 16 | } | ||
| 17 | |||
| 18 | // `path` must not contain trailing slashes (but it can be "/") | ||
| 19 | 326 | static inline StringView path_slice_basename(StringView path) | |
| 20 | { | ||
| 21 | 326 | ssize_t slash = strview_memrchr_idx(path, '/'); | |
| 22 | 326 | strview_remove_prefix(&path, slash + 1); // slash + 1 is 0 if no slash was found | |
| 23 | 326 | return path; | |
| 24 | } | ||
| 25 | |||
| 26 | // `path` must not contain trailing slashes (but it can be "/") | ||
| 27 | NONNULL_ARGS_AND_RETURN | ||
| 28 | 161 | static inline const char *path_basename(const char *path) | |
| 29 | { | ||
| 30 | 161 | const char *slash = strrchr(path, '/'); | |
| 31 |
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161 | return slash ? slash + 1 : path; |
| 32 | } | ||
| 33 | |||
| 34 | NONNULL_ARGS | ||
| 35 | 85 | static inline StringView path_slice_dirname(const char *path) | |
| 36 | { | ||
| 37 | 85 | const char *slash = strrchr(path, '/'); | |
| 38 |
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85 | if (!slash) { |
| 39 | 16 | return strview("."); | |
| 40 | } | ||
| 41 | 69 | bool slash_is_root_dir = (slash == path); | |
| 42 |
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69 | return string_view(path, slash_is_root_dir ? 1 : slash - path); |
| 43 | } | ||
| 44 | |||
| 45 | XSTRDUP | ||
| 46 | 50 | static inline char *path_dirname(const char *path) | |
| 47 | { | ||
| 48 | 50 | return strview_clone_cstring(path_slice_dirname(path)); | |
| 49 | } | ||
| 50 | |||
| 51 | 122 | static inline char *path_join_sv(StringView s1, StringView s2, bool trailing_slash) | |
| 52 | { | ||
| 53 | 122 | const char slash[2] = "/"; | |
| 54 | 122 | size_t n1 = s1.length; | |
| 55 | 122 | size_t n2 = s2.length; | |
| 56 |
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122 | size_t sep = n1 && n2 && s1.data[n1 - 1] != '/'; // Separating slash length (1 or 0) |
| 57 |
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122 | size_t ts = trailing_slash && n2 && s2.data[n2 - 1] != '/'; // Trailing slash length (1 or 0) |
| 58 | 122 | return xmemjoin4(s1.data, n1, slash, sep, s2.data, n2, slash + !ts, ts + 1); | |
| 59 | } | ||
| 60 | |||
| 61 | 60 | static inline char *path_join(const char *s1, const char *s2) | |
| 62 | { | ||
| 63 | 60 | return path_join_sv(strview(s1), strview(s2), false); | |
| 64 | } | ||
| 65 | |||
| 66 | // If path is the root directory, return false. Otherwise, mutate the | ||
| 67 | // path argument to become its parent directory and return true. Note | ||
| 68 | // that path *must* be canonical (i.e. as returned by path_absolute()). | ||
| 69 | 11 | static inline bool path_parent(StringView *path) | |
| 70 | { | ||
| 71 | 11 | BUG_ON(!strview_has_prefix(*path, "/")); | |
| 72 |
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11 | if (unlikely(path->length == 1)) { |
| 73 | return false; // Root dir | ||
| 74 | } | ||
| 75 | |||
| 76 | // Remove up to 1 trailing slash | ||
| 77 |
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9 | if (unlikely(strview_remove_matching_suffix(path, "/"))) { |
| 78 | 1 | BUG_ON(strview_has_suffix(*path, "/")); | |
| 79 | } | ||
| 80 | |||
| 81 | // Adjust the length, to exclude the last path component | ||
| 82 | 9 | ssize_t slash_idx = strview_memrchr_idx(*path, '/'); | |
| 83 | 9 | BUG_ON(slash_idx < 0); | |
| 84 | 9 | path->length = MAX(slash_idx, 1); // Shortest valid path is "/" | |
| 85 | 9 | return true; | |
| 86 | } | ||
| 87 | |||
| 88 | char *path_absolute(const char *path) MALLOC NONNULL_ARGS; | ||
| 89 | char *path_relative(const char *absolute, const char *cwd) XSTRDUP; | ||
| 90 | char *short_filename(const char *absolute, StringView home_dir) XSTRDUP; | ||
| 91 | char *short_filename_cwd(const char *absolute, const char *cwd, StringView home_dir) XSTRDUP; | ||
| 92 | const char *path_slice_relative(const char *abs, const char *cwd) NONNULL_ARGS RETURNS_NONNULL; | ||
| 93 | |||
| 94 | #endif | ||
| 95 |