MINOR: standard: add function "escape_string"
Similar to "escape_chunk", this function tries to prefix all characters
tagged in the <map> with the <escape> character. The specified <string>
contains the input to be escaped.
diff --git a/src/standard.c b/src/standard.c
index 4d0e3ed..f002573 100644
--- a/src/standard.c
+++ b/src/standard.c
@@ -1472,6 +1472,36 @@
/*
* Tries to prefix characters tagged in the <map> with the <escape>
+ * character. The input <string> must be zero-terminated. The result will
+ * be stored between <start> (included) and <stop> (excluded). This
+ * function will always try to terminate the resulting string with a '\0'
+ * before <stop>, and will return its position if the conversion
+ * completes.
+ */
+char *escape_string(char *start, char *stop,
+ const char escape, const fd_set *map,
+ const char *string)
+{
+ if (start < stop) {
+ stop--; /* reserve one byte for the final '\0' */
+ while (start < stop && *string != '\0') {
+ if (!FD_ISSET((unsigned char)(*string), map))
+ *start++ = *string;
+ else {
+ if (start + 2 >= stop)
+ break;
+ *start++ = escape;
+ *start++ = *string;
+ }
+ string++;
+ }
+ *start = '\0';
+ }
+ return start;
+}
+
+/*
+ * Tries to prefix characters tagged in the <map> with the <escape>
* character. <chunk> contains the input to be escaped. The result will be
* stored between <start> (included) and <stop> (excluded). The function
* will always try to terminate the resulting string with a '\0' before