diff options
Diffstat (limited to 'src/string_utils.h')
| -rw-r--r-- | src/string_utils.h | 109 |
1 files changed, 59 insertions, 50 deletions
diff --git a/src/string_utils.h b/src/string_utils.h index a80c3a27..b6b77c95 100644 --- a/src/string_utils.h +++ b/src/string_utils.h @@ -24,71 +24,76 @@ #include <stdint.h> /** Unicode replacement character in UTF-8 */ -static const uint8_t replacement_char[] = { 0xEF, 0xBF, 0xBD }; +static const uint8_t replacement_char[] = {0xEF, 0xBF, 0xBD}; /** Return true if `c` lies within [`min`...`max`] (inclusive) */ static inline bool in_range(const int c, const int min, const int max) { - return (c >= min && c <= max); + return (c >= min && c <= max); } /** RFC2234: ALPHA ::= %x41-5A / %x61-7A ; A-Z / a-z */ static inline bool is_alpha(const int c) { - return in_range(c, 'A', 'Z') || in_range(c, 'a', 'z'); + return in_range(c, 'A', 'Z') || in_range(c, 'a', 'z'); } /** RFC2234: DIGIT ::= %x30-39 ; 0-9 */ static inline bool is_digit(const int c) { - return in_range(c, '0', '9'); + return in_range(c, '0', '9'); } /* RFC2234: HEXDIG ::= DIGIT / "A" / "B" / "C" / "D" / "E" / "F" */ static inline bool is_hexdig(const int c) { - return is_digit(c) || in_range(c, 'A', 'F'); + return is_digit(c) || in_range(c, 'A', 'F'); } /* Turtle / JSON / C: XDIGIT ::= DIGIT / A-F / a-f */ static inline bool is_xdigit(const int c) { - return is_hexdig(c) || in_range(c, 'a', 'f'); + return is_hexdig(c) || in_range(c, 'a', 'f'); } static inline bool is_space(const char c) { - switch (c) { - case ' ': case '\f': case '\n': case '\r': case '\t': case '\v': - return true; - default: - return false; - } + switch (c) { + case ' ': + case '\f': + case '\n': + case '\r': + case '\t': + case '\v': + return true; + default: + return false; + } } static inline bool is_print(const int c) { - return c >= 0x20 && c <= 0x7E; + return c >= 0x20 && c <= 0x7E; } static inline bool is_base64(const uint8_t c) { - return is_alpha(c) || is_digit(c) || c == '+' || c == '/' || c == '='; + return is_alpha(c) || is_digit(c) || c == '+' || c == '/' || c == '='; } static inline bool is_windows_path(const uint8_t* path) { - return is_alpha(path[0]) && (path[1] == ':' || path[1] == '|') - && (path[2] == '/' || path[2] == '\\'); + return is_alpha(path[0]) && (path[1] == ':' || path[1] == '|') && + (path[2] == '/' || path[2] == '\\'); } size_t @@ -100,65 +105,69 @@ serd_substrlen(const uint8_t* str, static inline char serd_to_upper(const char c) { - return (char)((c >= 'a' && c <= 'z') ? c - 32 : c); + return (char)((c >= 'a' && c <= 'z') ? c - 32 : c); } static inline int serd_strncasecmp(const char* s1, const char* s2, size_t n) { - for (; n > 0 && *s2; s1++, s2++, --n) { - if (serd_to_upper(*s1) != serd_to_upper(*s2)) { - return ((*(const uint8_t*)s1 < *(const uint8_t*)s2) ? -1 : +1); - } - } - return 0; + for (; n > 0 && *s2; s1++, s2++, --n) { + if (serd_to_upper(*s1) != serd_to_upper(*s2)) { + return ((*(const uint8_t*)s1 < *(const uint8_t*)s2) ? -1 : +1); + } + } + + return 0; } static inline uint32_t utf8_num_bytes(const uint8_t c) { - if ((c & 0x80) == 0) { // Starts with `0' - return 1; - } + if ((c & 0x80) == 0) { // Starts with `0' + return 1; + } - if ((c & 0xE0) == 0xC0) { // Starts with `110' - return 2; - } + if ((c & 0xE0) == 0xC0) { // Starts with `110' + return 2; + } - if ((c & 0xF0) == 0xE0) { // Starts with `1110' - return 3; - } + if ((c & 0xF0) == 0xE0) { // Starts with `1110' + return 3; + } - if ((c & 0xF8) == 0xF0) { // Starts with `11110' - return 4; - } + if ((c & 0xF8) == 0xF0) { // Starts with `11110' + return 4; + } - return 0; + return 0; } /// Return the code point of a UTF-8 character with known length static inline uint32_t parse_counted_utf8_char(const uint8_t* utf8, size_t size) { - uint32_t c = utf8[0] & ((1u << (8 - size)) - 1); - for (size_t i = 1; i < size; ++i) { - const uint8_t in = utf8[i] & 0x3F; - c = (c << 6) | in; - } - return c; + uint32_t c = utf8[0] & ((1u << (8 - size)) - 1); + for (size_t i = 1; i < size; ++i) { + const uint8_t in = utf8[i] & 0x3F; + c = (c << 6) | in; + } + return c; } /// Parse a UTF-8 character, set *size to the length, and return the code point static inline uint32_t parse_utf8_char(const uint8_t* utf8, size_t* size) { - switch (*size = utf8_num_bytes(utf8[0])) { - case 1: case 2: case 3: case 4: - return parse_counted_utf8_char(utf8, *size); - default: - *size = 0; - return 0; - } + switch (*size = utf8_num_bytes(utf8[0])) { + case 1: + case 2: + case 3: + case 4: + return parse_counted_utf8_char(utf8, *size); + default: + *size = 0; + return 0; + } } -#endif // SERD_STRING_UTILS_H +#endif // SERD_STRING_UTILS_H |