diff options
Diffstat (limited to 'string32.c')
| -rw-r--r-- | string32.c | 42 |
1 files changed, 41 insertions, 1 deletions
@@ -76,6 +76,43 @@ static char *str32_to_utf8_cstr(String32 s) { return utf8; } +// compare s to the ASCII string `ascii` +static int str32_cmp_ascii(String32 s, char const *ascii) { + for (size_t i = 0; i < s.len; ++i) { + assert((char32_t)ascii[i] < 128); + if ((char32_t)ascii[i] == '\0') + return -1; // ascii is a prefix of s + if (s.str[i] > (char32_t)ascii[i]) + return +1; + if (s.str[i] < (char32_t)ascii[i]) + return -1; + } + if (ascii[s.len]) { + // s is a prefix of ascii + return +1; + } + return 0; +} + +// check if s starts with the ASCII string `ascii` +static int str32_has_ascii_prefix(String32 s, char const *ascii) { + for (size_t i = 0; i < s.len; ++i) { + assert((char32_t)ascii[i] < 128); + if ((char32_t)ascii[i] == '\0') + return true; // ascii is a prefix of s + if (s.str[i] > (char32_t)ascii[i]) + return false; + if (s.str[i] < (char32_t)ascii[i]) + return false; + } + if (ascii[s.len]) { + // s is a prefix of ascii + return false; + } + // s is the same as ascii + return true; +} + // returns the index of the given character in the string, or the length of the string if it's not found. size_t str32chr(String32 s, char32_t c) { for (size_t i = 0; i < s.len; ++i) { @@ -127,8 +164,11 @@ bool is32_digit(char32_t c) { return c <= WINT_MAX && iswdigit((wint_t)c); } +bool is32_graph(char32_t c) { + return c <= WINT_MAX && iswgraph((wint_t)c); +} + // could this character appear in a C-style identifier? bool is32_ident(char32_t c) { return c <= WINT_MAX && (iswalnum((wint_t)c) || c == '_'); } - |