diff options
Diffstat (limited to 'libcharconv_yijing_digrams.c')
| -rw-r--r-- | libcharconv_yijing_digrams.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/libcharconv_yijing_digrams.c b/libcharconv_yijing_digrams.c new file mode 100644 index 0000000..91bc36f --- /dev/null +++ b/libcharconv_yijing_digrams.c @@ -0,0 +1,51 @@ +/* See LICENSE file for copyright and license details. */ +#include "lib-common.h" + + +enum libcharconv_result +libcharconv_yijing_digrams(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp) +{ + uint_least32_t c; + *n = 0; + for (; slen--; s++) { + if ('1' <= s[0] && s[0] <= '3') { + if (!slen) + return LIBCHARCONV_INDETERMINATE; + if (s[0] == '1' && s[1] == '1') + c = UINT32_C(0x268C); + else if (s[0] == '1' && s[1] == '2') + c = UINT32_C(0x268E); + else if (s[0] == '1' && s[1] == '3') + c = UINT32_C(0x1D301); + else if (s[0] == '2' && s[1] == '1') + c = UINT32_C(0x268D); + else if (s[0] == '2' && s[1] == '2') + c = UINT32_C(0x268F); + else if (s[0] == '2' && s[1] == '3') + c = UINT32_C(0x1D302); + else if (s[0] == '3' && s[1] == '1') + c = UINT32_C(0x1D303); + else if (s[0] == '3' && s[1] == '2') + c = UINT32_C(0x1D304); + else if (s[0] == '3' && s[1] == '3') + c = UINT32_C(0x1D305); + else + goto no_match; + goto conv; + } else { + no_match: + *n += 1u; + } + } +no_conv: + return LIBCHARCONV_NO_CONVERT; + +conv: + if (*n) + goto no_conv; + if (*ncp) + *cp = c; + *n += 2u; + *ncp = 1u; + return LIBCHARCONV_CONVERTED; +} |