+U_CAPI int32_t
+utrans_stripRules(const UChar *source, int32_t sourceLen, UChar *target, UErrorCode *status) {
+ U_NAMESPACE_USE
+
+ //const UChar *sourceStart = source;
+ const UChar *targetStart = target;
+ const UChar *sourceLimit = source+sourceLen;
+ UChar *targetLimit = target+sourceLen;
+ UChar32 c = 0;
+ UBool quoted = FALSE;
+ int32_t index;
+
+ uprv_memset(target, 0, sourceLen*U_SIZEOF_UCHAR);
+
+ /* read the rules into the buffer */
+ while (source < sourceLimit)
+ {
+ index=0;
+ U16_NEXT_UNSAFE(source, index, c);
+ source+=index;
+ if(c == QUOTE) {
+ quoted = (UBool)!quoted;
+ }
+ else if (!quoted) {
+ if (c == RULE_COMMENT_CHAR) {
+ /* skip comments and all preceding spaces */
+ while (targetStart < target && *(target - 1) == 0x0020) {
+ target--;
+ }
+ do {
+ if (source == sourceLimit) {
+ c = U_SENTINEL;
+ break;
+ }
+ c = *(source++);
+ }
+ while (c != CR && c != LF);
+ if (c < 0) {
+ break;
+ }
+ }
+ else if (c == ESCAPE && source < sourceLimit) {
+ UChar32 c2 = *source;
+ if (c2 == CR || c2 == LF) {
+ /* A backslash at the end of a line. */
+ /* Since we're stripping lines, ignore the backslash. */
+ source++;
+ continue;
+ }
+ if (c2 == 0x0075 && source+5 < sourceLimit) { /* \u seen. \U isn't unescaped. */
+ int32_t escapeOffset = 0;
+ UnicodeString escapedStr(source, 5);
+ c2 = escapedStr.unescapeAt(escapeOffset);
+
+ if (c2 == (UChar32)0xFFFFFFFF || escapeOffset == 0)
+ {
+ *status = U_PARSE_ERROR;
+ return 0;
+ }
+ if (!PatternProps::isWhiteSpace(c2) && !u_iscntrl(c2) && !u_ispunct(c2)) {
+ /* It was escaped for a reason. Write what it was suppose to be. */
+ source+=5;
+ c = c2;
+ }
+ }
+ else if (c2 == QUOTE) {
+ /* \' seen. Make sure we don't do anything when we see it again. */
+ quoted = (UBool)!quoted;
+ }
+ }
+ }
+ if (c == CR || c == LF)
+ {
+ /* ignore spaces carriage returns, and all leading spaces on the next line.
+ * and line feed unless in the form \uXXXX
+ */
+ quoted = FALSE;
+ while (source < sourceLimit) {
+ c = *(source);
+ if (c != CR && c != LF && c != 0x0020) {
+ break;
+ }
+ source++;
+ }
+ continue;
+ }
+
+ /* Append UChar * after dissembling if c > 0xffff*/
+ index=0;
+ U16_APPEND_UNSAFE(target, index, c);
+ target+=index;
+ }
+ if (target < targetLimit) {
+ *target = 0;
+ }
+ return (int32_t)(target-targetStart);
+}
+
projects / apple / icu.git / blobdiff