src/util/str-array.h
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #ifndef UTIL_STR_ARRAY_H | ||
| 2 | #define UTIL_STR_ARRAY_H | ||
| 3 | |||
| 4 | // Utility functions for working with null-terminated arrays of null-terminated | ||
| 5 | // strings, like e.g. the "argv" argument passed to main() | ||
| 6 | |||
| 7 | #include <stdbool.h> | ||
| 8 | #include <stdlib.h> | ||
| 9 | #include <string.h> | ||
| 10 | #include "debug.h" | ||
| 11 | #include "macros.h" | ||
| 12 | #include "str-util.h" | ||
| 13 | #include "string-view.h" | ||
| 14 | #include "xmalloc.h" | ||
| 15 | #include "xstring.h" | ||
| 16 | |||
| 17 | 11594 | static inline size_t string_array_length(char **strings) | |
| 18 | { | ||
| 19 | 11594 | size_t n = 0; | |
| 20 |
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36926 | while (strings[n]) { |
| 21 | 25332 | n++; | |
| 22 | } | ||
| 23 | 11594 | return n; | |
| 24 | } | ||
| 25 | |||
| 26 | 41 | static inline bool string_array_contains_prefix(char **strs, const char *prefix) | |
| 27 | { | ||
| 28 | 41 | size_t prefix_len = strlen(prefix); | |
| 29 |
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159 | for (size_t i = 0; strs[i]; i++) { |
| 30 |
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118 | if (str_has_strn_prefix(strs[i], prefix, prefix_len)) { |
| 31 | return true; | ||
| 32 | } | ||
| 33 | } | ||
| 34 | return false; | ||
| 35 | } | ||
| 36 | |||
| 37 | 2 | static inline bool string_array_contains_str(char **strs, const char *str) | |
| 38 | { | ||
| 39 |
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2 | for (size_t i = 0; strs[i]; i++) { |
| 40 |
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1 | if (streq(strs[i], str)) { |
| 41 | return true; | ||
| 42 | } | ||
| 43 | } | ||
| 44 | return false; | ||
| 45 | } | ||
| 46 | |||
| 47 | 548 | static inline char **copy_string_array(char **src, size_t count) | |
| 48 | { | ||
| 49 | 548 | char **dst = xmallocarray(count + 1, sizeof(*dst)); | |
| 50 |
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2259 | for (size_t i = 0; i < count; i++) { |
| 51 | 1163 | dst[i] = xstrdup(src[i]); | |
| 52 | } | ||
| 53 | 548 | dst[count] = NULL; | |
| 54 | 548 | return dst; | |
| 55 | } | ||
| 56 | |||
| 57 | // Concatenates an array of strings into a fixed-size buffer, as a single, | ||
| 58 | // delimiter-separated string. This is separate from string_array_concat() | ||
| 59 | // only as a convenience for testing. | ||
| 60 | WARN_UNUSED_RESULT NONNULL_ARGS | ||
| 61 | 100 | static inline bool string_array_concat_ ( | |
| 62 | char *buf, size_t bufsize, | ||
| 63 | const char *const *strs, size_t nstrs, | ||
| 64 | StringView delim | ||
| 65 | ) { | ||
| 66 | 100 | BUG_ON(bufsize == 0); | |
| 67 | 100 | const char *end = buf + bufsize; | |
| 68 | 100 | char *ptr = buf; | |
| 69 | 100 | buf[0] = '\0'; // Always null-terminate `buf`, even if `nstrs == 0` | |
| 70 | |||
| 71 |
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614 | for (size_t i = 0; i < nstrs; i++) { |
| 72 | 543 | bool last_iter = (i + 1 == nstrs); | |
| 73 | 543 | ptr = memccpy(ptr, strs[i], '\0', end - ptr); | |
| 74 |
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543 | if (unlikely(!ptr || (!last_iter && ptr + delim.length > end))) { |
| 75 | return false; | ||
| 76 | } | ||
| 77 | // Append `delim` (over the copied '\0'), if not on the last iteration | ||
| 78 |
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514 | ptr = last_iter ? ptr : xmempcpy(ptr - 1, delim.data, delim.length); |
| 79 | } | ||
| 80 | |||
| 81 | return true; | ||
| 82 | } | ||
| 83 | |||
| 84 | // Like string_array_concat_(), but asserting that it should never return | ||
| 85 | // false (i.e. because the required `bufsize` is known at compile-time) | ||
| 86 | 68 | static inline void string_array_concat ( | |
| 87 | char *buf, size_t bufsize, | ||
| 88 | const char *const *strs, size_t nstrs, | ||
| 89 | StringView delim | ||
| 90 | ) { | ||
| 91 | 68 | bool r = string_array_concat_(buf, bufsize, strs, nstrs, delim); | |
| 92 | 68 | BUG_ON(!r); | |
| 93 | 68 | } | |
| 94 | |||
| 95 | NONNULL_ARGS | ||
| 96 | 2495 | static inline void free_string_array(char **strings) | |
| 97 | { | ||
| 98 |
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3716 | for (size_t i = 0; strings[i]; i++) { |
| 99 | 1221 | free(strings[i]); | |
| 100 | } | ||
| 101 | 2495 | free(strings); | |
| 102 | 2495 | } | |
| 103 | |||
| 104 | #endif | ||
| 105 |