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-rw-r--r--src/shared/utf8.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/src/shared/utf8.c b/src/shared/utf8.c
index 8702ceb1b2..0b6c38ebbf 100644
--- a/src/shared/utf8.c
+++ b/src/shared/utf8.c
@@ -212,6 +212,45 @@ char *utf8_escape_invalid(const char *str) {
return p;
}
+char *utf8_escape_non_printable(const char *str) {
+ char *p, *s;
+
+ assert(str);
+
+ p = s = malloc(strlen(str) * 4 + 1);
+ if (!p)
+ return NULL;
+
+ while (*str) {
+ int len;
+
+ len = utf8_encoded_valid_unichar(str);
+ if (len > 0) {
+ if (utf8_is_printable(str, len)) {
+ s = mempcpy(s, str, len);
+ str += len;
+ } else {
+ if ((*str < ' ') || (*str >= 127)) {
+ *(s++) = '\\';
+ *(s++) = 'x';
+ *(s++) = hexchar((int) *str >> 4);
+ *(s++) = hexchar((int) *str);
+ } else
+ *(s++) = *str;
+
+ str += 1;
+ }
+ } else {
+ s = mempcpy(s, UTF8_REPLACEMENT_CHARACTER, strlen(UTF8_REPLACEMENT_CHARACTER));
+ str += 1;
+ }
+ }
+
+ *s = '\0';
+
+ return p;
+}
+
char *ascii_is_valid(const char *str) {
const char *p;