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 | #include "xmemrchr.h" | ||
| 12 | |||
| 13 | NONNULL_ARGS | ||
| 14 | 323 | static inline bool path_is_absolute(const char *path) | |
| 15 | { | ||
| 16 | 323 | return path[0] == '/'; | |
| 17 | } | ||
| 18 | |||
| 19 | // `path` must not contain trailing slashes (but it can be "/") | ||
| 20 | 326 | static inline StringView path_slice_basename(StringView path) | |
| 21 | { | ||
| 22 | 326 | ssize_t slash = strview_memrchr_idx(path, '/'); | |
| 23 | 326 | strview_remove_prefix(&path, slash + 1); // slash + 1 is 0 if no slash was found | |
| 24 | 326 | return path; | |
| 25 | } | ||
| 26 | |||
| 27 | // `path` must not contain trailing slashes (but it can be "/") | ||
| 28 | NONNULL_ARGS_AND_RETURN | ||
| 29 | 161 | static inline const char *path_basename(const char *path) | |
| 30 | { | ||
| 31 | 161 | const char *slash = strrchr(path, '/'); | |
| 32 |
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161 | return slash ? slash + 1 : path; |
| 33 | } | ||
| 34 | |||
| 35 | NONNULL_ARGS | ||
| 36 | 85 | static inline StringView path_slice_dirname(const char *path) | |
| 37 | { | ||
| 38 | 85 | const char *slash = strrchr(path, '/'); | |
| 39 |
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85 | if (!slash) { |
| 40 | 16 | return strview("."); | |
| 41 | } | ||
| 42 | 69 | bool slash_is_root_dir = (slash == path); | |
| 43 |
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69 | return string_view(path, slash_is_root_dir ? 1 : slash - path); |
| 44 | } | ||
| 45 | |||
| 46 | XSTRDUP | ||
| 47 | 50 | static inline char *path_dirname(const char *path) | |
| 48 | { | ||
| 49 | 50 | return strview_clone_cstring(path_slice_dirname(path)); | |
| 50 | } | ||
| 51 | |||
| 52 | 122 | static inline char *path_join_sv(StringView s1, StringView s2, bool trailing_slash) | |
| 53 | { | ||
| 54 | 122 | const char slash[2] = "/"; | |
| 55 | 122 | size_t n1 = s1.length; | |
| 56 | 122 | size_t n2 = s2.length; | |
| 57 |
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122 | size_t sep = n1 && n2 && s1.data[n1 - 1] != '/'; // Separating slash length (1 or 0) |
| 58 |
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122 | size_t ts = trailing_slash && n2 && s2.data[n2 - 1] != '/'; // Trailing slash length (1 or 0) |
| 59 | 122 | return xmemjoin4(s1.data, n1, slash, sep, s2.data, n2, slash + !ts, ts + 1); | |
| 60 | } | ||
| 61 | |||
| 62 | 60 | static inline char *path_join(const char *s1, const char *s2) | |
| 63 | { | ||
| 64 | 60 | return path_join_sv(strview(s1), strview(s2), false); | |
| 65 | } | ||
| 66 | |||
| 67 | // If path is the root directory, return false. Otherwise, mutate the | ||
| 68 | // path argument to become its parent directory and return true. Note | ||
| 69 | // that path *must* be canonical (i.e. as returned by path_absolute()). | ||
| 70 | 11 | static inline bool path_parent(StringView *path) | |
| 71 | { | ||
| 72 | 11 | BUG_ON(!strview_has_prefix(*path, "/")); | |
| 73 |
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11 | if (unlikely(path->length == 1)) { |
| 74 | return false; // Root dir | ||
| 75 | } | ||
| 76 | |||
| 77 | // Remove up to 1 trailing slash | ||
| 78 |
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9 | if (unlikely(strview_remove_matching_suffix(path, "/"))) { |
| 79 | 1 | BUG_ON(strview_has_suffix(*path, "/")); | |
| 80 | } | ||
| 81 | |||
| 82 | // Adjust the length, to exclude the last path component | ||
| 83 | 9 | ssize_t slash_idx = strview_memrchr_idx(*path, '/'); | |
| 84 | 9 | BUG_ON(slash_idx < 0); | |
| 85 | 9 | path->length = MAX(slash_idx, 1); // Shortest valid path is "/" | |
| 86 | 9 | return true; | |
| 87 | } | ||
| 88 | |||
| 89 | char *path_absolute(const char *path) MALLOC NONNULL_ARGS; | ||
| 90 | char *path_relative(const char *absolute, const char *cwd) XSTRDUP; | ||
| 91 | char *short_filename(const char *absolute, StringView home_dir) XSTRDUP; | ||
| 92 | char *short_filename_cwd(const char *absolute, const char *cwd, StringView home_dir) XSTRDUP; | ||
| 93 | const char *path_slice_relative(const char *abs, const char *cwd) NONNULL_ARGS RETURNS_NONNULL; | ||
| 94 | |||
| 95 | #endif | ||
| 96 |