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-rw-r--r--Makefile6
-rw-r--r--convert-to-vulgar-fractions.c4
-rw-r--r--libcharconv.h6
-rw-r--r--libcharconv_latin.c23
-rw-r--r--libcharconv_vulgar_fractions.c108
5 files changed, 145 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 8e03a4f..ab81ea1 100644
--- a/Makefile
+++ b/Makefile
@@ -59,7 +59,8 @@ BIN =\
convert-to-yijing-digrams\
convert-to-yijing-trigrams\
convert-to-yijing-tetragrams\
- convert-to-yijing-hexagrams
+ convert-to-yijing-hexagrams\
+ convert-to-vulgar-fractions
LIBOBJ =\
libcharconv_decode_utf8_.o\
@@ -107,7 +108,8 @@ LIBOBJ =\
libcharconv_yijing_digrams.o\
libcharconv_yijing_trigrams.o\
libcharconv_yijing_tetragrams.o\
- libcharconv_yijing_hexagrams.o
+ libcharconv_yijing_hexagrams.o\
+ libcharconv_vulgar_fractions.o
LOBJ = $(LIBOBJ:.o=.lo)
diff --git a/convert-to-vulgar-fractions.c b/convert-to-vulgar-fractions.c
new file mode 100644
index 0000000..e8975d4
--- /dev/null
+++ b/convert-to-vulgar-fractions.c
@@ -0,0 +1,4 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+SIMPLE(libcharconv_vulgar_fractions)
diff --git a/libcharconv.h b/libcharconv.h
index 4a7d4db..402c839 100644
--- a/libcharconv.h
+++ b/libcharconv.h
@@ -322,6 +322,12 @@ LIBCHARCONV_FUNC_(libcharconv_yijing_tetragrams);
*/
LIBCHARCONV_FUNC_(libcharconv_yijing_hexagrams);
+/**
+ * Convert from ASCII to VULGAR FRACTIONs and FRACTION NUMERATORs,
+ * or from SOLIDUS to FRACTION SLASH
+ */
+LIBCHARCONV_FUNC_(libcharconv_vulgar_fractions);
+
#undef LIBCHARCONV_FUNC_
#endif
diff --git a/libcharconv_latin.c b/libcharconv_latin.c
index 232eb5c..c52044c 100644
--- a/libcharconv_latin.c
+++ b/libcharconv_latin.c
@@ -603,6 +603,29 @@ libcharconv_latin(const char *s, size_t slen, size_t *n, uint_least32_t *cp, siz
case UINT32_C(0x1D304): c1 = '3'; c2 = '2'; goto conv2;
case UINT32_C(0x1D305): c1 = '3'; c2 = '3'; goto conv2;
+ /* vulgar fractions */
+ case UINT32_C(0x2044): c1 = '/'; goto conv1;
+ case UINT32_C(0x215F): c1 = '1'; c2 = '/'; goto conv2;
+ case UINT32_C(0x2189): c1 = '0'; c2 = '/'; c3 = '3'; goto conv3;
+ case UINT32_C(0x00BD): c1 = '1'; c2 = '/'; c3 = '2'; goto conv3;
+ case UINT32_C(0x2153): c1 = '1'; c2 = '/'; c3 = '3'; goto conv3;
+ case UINT32_C(0x00BC): c1 = '1'; c2 = '/'; c3 = '4'; goto conv3;
+ case UINT32_C(0x2155): c1 = '1'; c2 = '/'; c3 = '5'; goto conv3;
+ case UINT32_C(0x2159): c1 = '1'; c2 = '/'; c3 = '6'; goto conv3;
+ case UINT32_C(0x2150): c1 = '1'; c2 = '/'; c3 = '7'; goto conv3;
+ case UINT32_C(0x215B): c1 = '1'; c2 = '/'; c3 = '8'; goto conv3;
+ case UINT32_C(0x2151): c1 = '1'; c2 = '/'; c3 = '9'; goto conv3;
+ case UINT32_C(0x2154): c1 = '2'; c2 = '/'; c3 = '3'; goto conv3;
+ case UINT32_C(0x2156): c1 = '2'; c2 = '/'; c3 = '5'; goto conv3;
+ case UINT32_C(0x00BE): c1 = '3'; c2 = '/'; c3 = '4'; goto conv3;
+ case UINT32_C(0x2157): c1 = '3'; c2 = '/'; c3 = '5'; goto conv3;
+ case UINT32_C(0x215C): c1 = '3'; c2 = '/'; c3 = '8'; goto conv3;
+ case UINT32_C(0x2158): c1 = '4'; c2 = '/'; c3 = '5'; goto conv3;
+ case UINT32_C(0x215A): c1 = '5'; c2 = '/'; c3 = '6'; goto conv3;
+ case UINT32_C(0x215D): c1 = '5'; c2 = '/'; c3 = '8'; goto conv3;
+ case UINT32_C(0x215E): c1 = '7'; c2 = '/'; c3 = '8'; goto conv3;
+ case UINT32_C(0x2152): c1 = '1'; c2 = '/'; c3 = '1'; c4 = '0'; goto conv4;
+
default:
no_match:
*n += clen;
diff --git a/libcharconv_vulgar_fractions.c b/libcharconv_vulgar_fractions.c
new file mode 100644
index 0000000..a89a02f
--- /dev/null
+++ b/libcharconv_vulgar_fractions.c
@@ -0,0 +1,108 @@
+/* See LICENSE file for copyright and license details. */
+#include "lib-common.h"
+
+
+enum libcharconv_result
+libcharconv_vulgar_fractions(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 (s[0] == '/') {
+ if (*n)
+ goto no_conv;
+ c = UINT32_C(0x2044);
+ *n = 1u;
+ goto conv;
+ } else if (('0' <= s[0] && s[0] <= '5') || s[0] <= '7') {
+ if (*n)
+ goto no_conv;
+ if (slen == 0u)
+ return LIBCHARCONV_INDETERMINATE;
+ if (s[1] != '/')
+ goto no_match;
+ if (slen == 1u) {
+ if (s[0] == '1') {
+ c = UINT32_C(0x215F);
+ *n = 2u;
+ if (*ncp)
+ *cp = c;
+ *ncp = 1u;
+ return LIBCHARCONV_CONVERT_IF_END;
+ } else {
+ return LIBCHARCONV_INDETERMINATE;
+ }
+ }
+ if (s[0] == '0' && s[2] == '3') {
+ c = UINT32_C(0x2189);
+ } else if (s[0] == '2' && s[2] == '3') {
+ c = UINT32_C(0x2154);
+ } else if (s[0] == '2' && s[2] == '5') {
+ c = UINT32_C(0x2156);
+ } else if (s[0] == '3' && s[2] == '4') {
+ c = UINT32_C(0x00BE);
+ } else if (s[0] == '3' && s[2] == '5') {
+ c = UINT32_C(0x2157);
+ } else if (s[0] == '3' && s[2] == '8') {
+ c = UINT32_C(0x215C);
+ } else if (s[0] == '4' && s[2] == '5') {
+ c = UINT32_C(0x2158);
+ } else if (s[0] == '5' && s[2] == '6') {
+ c = UINT32_C(0x215A);
+ } else if (s[0] == '5' && s[2] == '8') {
+ c = UINT32_C(0x215D);
+ } else if (s[0] == '7' && s[2] == '8') {
+ c = UINT32_C(0x215E);
+ } else if (s[0] == '1' && s[2] == '2') {
+ c = UINT32_C(0x00BD);
+ } else if (s[0] == '1' && s[2] == '3') {
+ c = UINT32_C(0x2153);
+ } else if (s[0] == '1' && s[2] == '4') {
+ c = UINT32_C(0x00BC);
+ } else if (s[0] == '1' && s[2] == '5') {
+ c = UINT32_C(0x2155);
+ } else if (s[0] == '1' && s[2] == '6') {
+ c = UINT32_C(0x2159);
+ } else if (s[0] == '1' && s[2] == '7') {
+ c = UINT32_C(0x2150);
+ } else if (s[0] == '1' && s[2] == '8') {
+ c = UINT32_C(0x215B);
+ } else if (s[0] == '1' && s[2] == '9') {
+ c = UINT32_C(0x2151);
+ } else if (s[0] == '1' && s[2] == '1') {
+ if (slen == 2u)
+ return LIBCHARCONV_INDETERMINATE;
+ if (s[3] == '0') {
+ c = UINT32_C(0x2152);
+ *n = 4u;
+ if (*ncp)
+ *cp = c;
+ *ncp = 1u;
+ return LIBCHARCONV_CONVERTED;
+ } else {
+ goto denum_1;
+ }
+ } else if (s[0] == '1') {
+ denum_1:
+ *n = 2u;
+ c = UINT32_C(0x215F);
+ goto conv;
+ } else {
+ goto no_match;
+ }
+ *n = 3u;
+ goto conv;
+ } else {
+ no_match:
+ *n += 1u;
+ }
+ }
+no_conv:
+ return LIBCHARCONV_NO_CONVERT;
+
+conv:
+ if (*ncp)
+ *cp = c;
+ *ncp = 1u;
+ return LIBCHARCONV_CONVERTED;
+}
generated by cgit v1.2.3-70-g09d2 (git 2.51.0) at 2026-02-20 20:20:03 +0000