src/util/array.c
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include "array.h" | ||
| 2 | #include "log.h" | ||
| 3 | #include "str-util.h" | ||
| 4 | #include "xmalloc.h" | ||
| 5 | |||
| 6 | // This can be used to collect all prefix-matched strings from a "flat" array | ||
| 7 | // (i.e. an array of fixed-length char arrays; *not* pointers to char) | ||
| 8 | 20 | void collect_strings_from_flat_array ( | |
| 9 | const char *base, | ||
| 10 | size_t nr_elements, | ||
| 11 | size_t element_len, | ||
| 12 | PointerArray *a, | ||
| 13 | StringView prefix | ||
| 14 | ) { | ||
| 15 | 20 | const char *end = base + (nr_elements * element_len); | |
| 16 |
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582 | for (const char *str = base; str < end; str += element_len) { |
| 17 |
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562 | if (str_has_sv_prefix(str, prefix)) { |
| 18 | 317 | ptr_array_append(a, xstrdup(str)); | |
| 19 | } | ||
| 20 | } | ||
| 21 | 20 | } | |
| 22 | |||
| 23 | // Return bitflags corresponding to a set of comma-delimited substrings | ||
| 24 | // found in an array. For example, if the string is "str3,str7" and | ||
| 25 | // those 2 substrings are found at array[3] and array[7] respectively, | ||
| 26 | // the returned value will be `1 << 3 | 1 << 7`. | ||
| 27 | 9 | unsigned int str_to_bitflags ( | |
| 28 | const char *str, | ||
| 29 | const char *base, // Pointer to start of char[nstrs][size] array | ||
| 30 | size_t nstrs, | ||
| 31 | size_t size, | ||
| 32 | bool tolerate_errors // Whether to ignore invalid substrings | ||
| 33 | ) { | ||
| 34 | // Copy `str` into a mutable buffer, so that get_delim_str() can be | ||
| 35 | // used to split (and null-terminate) the comma-delimited substrings | ||
| 36 | 9 | char buf[512]; | |
| 37 | 9 | const char *end = memccpy(buf, str, '\0', sizeof(buf)); | |
| 38 |
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9 | if (unlikely(!end)) { |
| 39 | ✗ | LOG_ERROR("flags string too long: %.*s...", 80, str); | |
| 40 | ✗ | return 0; | |
| 41 | } | ||
| 42 | |||
| 43 | 9 | unsigned int flags = 0; | |
| 44 |
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28 | for (size_t pos = 0, len = end - buf - 1; pos < len; ) { |
| 45 | 20 | const char *substr = get_delim_str(buf, &pos, len, ','); | |
| 46 | 20 | ssize_t idx = find_str_idx(substr, base, nstrs, size, streq); | |
| 47 |
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20 | if (unlikely(idx < 0)) { |
| 48 |
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10 | if (!tolerate_errors) { |
| 49 | 1 | return 0; | |
| 50 | } | ||
| 51 | 9 | LOG_WARNING("unrecognized flag string: '%s'", substr); | |
| 52 | 9 | continue; | |
| 53 | } | ||
| 54 | 10 | flags |= 1u << idx; | |
| 55 | } | ||
| 56 | |||
| 57 | 8 | return flags; | |
| 58 | } | ||
| 59 |