s3: add function srprs_quoted to parse strings written with cbuf_print_quoted

2 files changed, 52 insertions, 1 deletions

diff --git a/source3/lib/srprs.c b/source3/lib/srprs.c
index 77464f5f3a..5a032d27b6 100644
--- a/source3/lib/srprs.c
+++ b/source3/lib/srprs.c
@@ -183,3 +183,43 @@ bool srprs_line(const char** ptr, cbuf* str)
 		;
 	return true;
 }
+
+bool srprs_quoted(const char** ptr, cbuf* str)
+{
+	const char* pos = *ptr;
+	const size_t spos = cbuf_getpos(str);
+
+	if (!srprs_char(&pos, '"')) {
+		goto fail;
+	}
+
+	while (true) {
+		while (srprs_charsetinv(&pos, "\\\"", str))
+			;
+
+		switch (*pos) {
+		case '\0':
+			goto fail;
+		case '"':
+			*ptr  = pos+1;
+			return true;
+
+		case '\\':
+			pos++;
+			if (!srprs_charset(&pos, "\\\"", str)) {
+				unsigned u;
+				if (!srprs_hex(&pos, 2, &u)) {
+					goto fail;
+				}
+				cbuf_putc(str, u);
+			}
+			break;
+		default:
+			assert(false);
+		}
+	}
+
+fail:
+	cbuf_setpos(str, spos);
+	return false;
+}
diff --git a/source3/lib/srprs.h b/source3/lib/srprs.h
index bbbcdc776a..350e08c2c1 100644
--- a/source3/lib/srprs.h
+++ b/source3/lib/srprs.h
@@ -113,9 +113,10 @@ bool srprs_charsetinv(const char** ptr, const char* set, struct cbuf* oss);
  * assert(*cont == false);
  * assert(strcmp(cbuf_gets(out, 0), "start...continued...end")==0);
  * @endcode
+ * @see cbuf_print_quoted_string
  *
  * @param[in,out] ptr parse position
- * @param[out] str output buffer where to put the match, may be NULL
+ * @param[out] str output buffer where to put the match
  * @param[in,out] cont
  *
  * @return true if matched
@@ -177,5 +178,15 @@ bool srprs_eol(const char** ptr, struct cbuf* nl);
  */
 bool srprs_line(const char** ptr, struct cbuf* str);
 
+/**
+ * Match a quoted string with escaped characters.
+ * @see cbuf_print_quoted
+ *
+ * @param[in,out] ptr parse position
+ * @param[out] str output buffer where to put the match
+ *
+ * @return true if matched
+ */
+bool srprs_quoted(const char** ptr, struct cbuf* str);
 
 #endif /* __SRPRS_H */