| 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 | // filename must not contain trailing slashes (but it can be "/") | ||
| 19 | NONNULL_ARGS_AND_RETURN | ||
| 20 | 387 | static inline const char *path_basename(const char *filename) | |
| 21 | { | ||
| 22 | 387 | const char *slash = strrchr(filename, '/'); | |
| 23 |
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387 | return slash ? slash + 1 : filename; |
| 24 | } | ||
| 25 | |||
| 26 | NONNULL_ARGS | ||
| 27 | 68 | static inline StringView path_slice_dirname(const char *filename) | |
| 28 | { | ||
| 29 | 68 | const char *slash = strrchr(filename, '/'); | |
| 30 |
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68 | if (!slash) { |
| 31 | 6 | return string_view(".", 1); | |
| 32 | } | ||
| 33 | 62 | bool slash_is_root_dir = (slash == filename); | |
| 34 |
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62 | return string_view(filename, slash_is_root_dir ? 1 : slash - filename); |
| 35 | } | ||
| 36 | |||
| 37 | XSTRDUP | ||
| 38 | 46 | static inline char *path_dirname(const char *filename) | |
| 39 | { | ||
| 40 | 46 | const StringView dir = path_slice_dirname(filename); | |
| 41 | 46 | return xstrcut(dir.data, dir.length); | |
| 42 | } | ||
| 43 | |||
| 44 | XSTRDUP | ||
| 45 | 117 | static inline char *path_join_sv(const StringView *s1, const StringView *s2, bool trailing_slash) | |
| 46 | { | ||
| 47 | 117 | BUG_ON(!s1->data || !s2->data); // ISO C11 memcpy(3) never allows NULL pointer arguments | |
| 48 | 117 | const char slash[2] = "/"; | |
| 49 | 117 | size_t n1 = s1->length; | |
| 50 | 117 | size_t n2 = s2->length; | |
| 51 |
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117 | size_t sep = n1 && n2 && s1->data[n1 - 1] != '/'; // Separating slash length (1 or 0) |
| 52 |
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117 | size_t ts = trailing_slash && n2 && s2->data[n2 - 1] != '/'; // Trailing slash length (1 or 0) |
| 53 | 117 | char *path = xmalloc(xadd3(n1, n2, sep + ts + 1)); | |
| 54 |
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120 | xmempcpy4(path, s1->data, n1, slash, sep, s2->data, n2, slash + !ts, 2 - !ts); |
| 55 | 117 | return path; | |
| 56 | } | ||
| 57 | |||
| 58 | XSTRDUP | ||
| 59 | 116 | static inline char *path_joinx(const char *s1, const char *s2, bool trailing_slash) | |
| 60 | { | ||
| 61 | 116 | StringView sv1 = strview_from_cstring(s1); | |
| 62 | 116 | StringView sv2 = strview_from_cstring(s2); | |
| 63 | 116 | return path_join_sv(&sv1, &sv2, trailing_slash); | |
| 64 | } | ||
| 65 | |||
| 66 | XSTRDUP | ||
| 67 | 58 | static inline char *path_join(const char *s1, const char *s2) | |
| 68 | { | ||
| 69 | 58 | return path_joinx(s1, s2, false); | |
| 70 | } | ||
| 71 | |||
| 72 | // If path is the root directory, return false. Otherwise, mutate the | ||
| 73 | // path argument to become its parent directory and return true. Note | ||
| 74 | // that path *must* be canonical (i.e. as returned by path_absolute()). | ||
| 75 | 11 | static inline bool path_parent(StringView *path) | |
| 76 | { | ||
| 77 | 11 | BUG_ON(!strview_has_prefix(path, "/")); | |
| 78 |
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11 | if (unlikely(path->length == 1)) { |
| 79 | return false; // Root dir | ||
| 80 | } | ||
| 81 | |||
| 82 | // Remove up to 1 trailing slash | ||
| 83 |
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9 | if (unlikely(strview_remove_matching_suffix(path, "/"))) { |
| 84 | 1 | BUG_ON(strview_has_suffix(path, "/")); | |
| 85 | } | ||
| 86 | |||
| 87 | // Adjust the length, to exclude the last path component | ||
| 88 | 9 | ssize_t slash_idx = strview_memrchr_idx(path, '/'); | |
| 89 | 9 | BUG_ON(slash_idx < 0); | |
| 90 | 9 | path->length = MAX(slash_idx, 1); // Shortest valid path is "/" | |
| 91 | 9 | return true; | |
| 92 | } | ||
| 93 | |||
| 94 | char *path_absolute(const char *path) MALLOC NONNULL_ARGS; | ||
| 95 | char *path_relative(const char *absolute, const char *cwd) XSTRDUP; | ||
| 96 | char *short_filename(const char *absolute, const StringView *home_dir) XSTRDUP; | ||
| 97 | char *short_filename_cwd(const char *absolute, const char *cwd, const StringView *home_dir) XSTRDUP; | ||
| 98 | const char *path_slice_relative(const char *abs, const char *cwd) NONNULL_ARGS RETURNS_NONNULL; | ||
| 99 | |||
| 100 | #endif | ||
| 101 |