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[utils] adding utf8 case insensitive comparison

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Al
2018-02-23 01:22:58 -05:00
parent 2b4e7073c2
commit 591891951d
2 changed files with 24 additions and 3 deletions
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25
src/string_utils.c
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@@ -452,7 +452,8 @@ size_t unicode_common_suffix(uint32_array *u1_array, uint32_array *u2_array) {
int utf8_compare_len(const char *str1, const char *str2, size_t len) {
int utf8_compare_len_option(const char *str1, const char *str2, size_t len, bool case_insensitive) {
if (len == 0) return 0;
int32_t c1, c2;
@@ -469,7 +470,7 @@ int utf8_compare_len(const char *str1, const char *str2, size_t len) {
if (c1 == 0 || c2 == 0) break;
if (c1 == c2) {
if (c1 == c2 || (case_insensitive && utf8proc_tolower(c1) == utf8proc_tolower(c2))) {
ptr1 += len1;
ptr2 += len2;
remaining -= len1;
@@ -484,8 +485,26 @@ int utf8_compare_len(const char *str1, const char *str2, size_t len) {
return (int) c1 - c2;
}
inline int utf8_compare_len(const char *str1, const char *str2, size_t len) {
return utf8_compare_len_option(str1, str2, len, false);
}
inline int utf8_compare(const char *str1, const char *str2) {
return utf8_compare_len(str1, str2, strlen(str1));
size_t len1 = strlen(str1);
size_t len2 = strlen(str2);
size_t max_len = len1 >= len2 ? len1 : len2;
return utf8_compare_len_option(str1, str2, max_len, false);
}
inline int utf8_compare_len_case_insensitive(const char *str1, const char *str2, size_t len) {
return utf8_compare_len_option(str1, str2, len, true);
}
inline int utf8_compare_case_insensitive(const char *str1, const char *str2, size_t len) {
size_t len1 = strlen(str1);
size_t len2 = strlen(str2);
size_t max_len = len1 >= len2 ? len1 : len2;
return utf8_compare_len_option(str1, str2, max_len, true);
}

2
src/string_utils.h
View File

@@ -78,6 +78,8 @@ char *utf8_upper(const char *s);
int utf8_compare(const char *str1, const char *str2);
int utf8_compare_len(const char *str1, const char *str2, size_t len);
int utf8_compare_case_insensitive(const char *str1, const char *str2, size_t len);
int utf8_compare_len_case_insensitive(const char *str1, const char *str2, size_t len);
size_t utf8_common_prefix(const char *str1, const char *str2);
size_t utf8_common_prefix_len(const char *str1, const char *str2, size_t len);
size_t utf8_common_prefix_ignore_separators(const char *str1, const char *str2);