X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flibpspp%2Fstr.c;h=2a592b9064d88368547216404cc759cb9da21b8b;hb=981adc6169ffe7227de286f92f70edf684d37a2b;hp=3046daee6d1bc4390b7793bacd2ada894ef83bb7;hpb=b525a9596e60d5ae4c6c464b4a426b77ade3dd72;p=pspp

diff --git a/src/libpspp/str.c b/src/libpspp/str.c
index 3046daee6d..2a592b9064 100644
--- a/src/libpspp/str.c
+++ b/src/libpspp/str.c
@@ -615,6 +615,21 @@ ss_match_string (struct substring *ss, const struct substring target)
     return false;
 }
 
+/* If SS begins with TARGET, except possibly for case differences, removes it
+   and returns true.  Otherwise, returns false without changing SS. */
+bool
+ss_match_string_case (struct substring *ss, const struct substring target)
+{
+  size_t length = ss_length (target);
+  if (ss_equals_case (ss_head (*ss, length), target))
+    {
+      ss_advance (ss, length);
+      return true;
+    }
+  else
+    return false;
+}
+
 /* Removes the first byte from SS and returns it.
    If SS is empty, returns EOF without modifying SS. */
 int
@@ -743,6 +758,14 @@ ss_starts_with (struct substring ss, struct substring prefix)
           && !memcmp (ss.string, prefix.string, prefix.length));
 }
 
+/* Returns true if SS starts with PREFIX in any case, false otherwise. */
+bool
+ss_starts_with_case (struct substring ss, struct substring prefix)
+{
+  return (ss.length >= prefix.length
+          && !memcasecmp (ss.string, prefix.string, prefix.length));
+}
+
 /* Returns true if SS ends with SUFFIX, false otherwise. */
 bool
 ss_ends_with (struct substring ss, struct substring suffix)
@@ -752,6 +775,15 @@ ss_ends_with (struct substring ss, struct substring suffix)
                       suffix.length));
 }
 
+/* Returns true if SS ends with SUFFIX in any case, false otherwise. */
+bool
+ss_ends_with_case (struct substring ss, struct substring suffix)
+{
+  return (ss.length >= suffix.length
+          && !memcasecmp (&ss.string[ss.length - suffix.length], suffix.string,
+                          suffix.length));
+}
+
 /* Returns the number of contiguous bytes at the beginning
    of SS that are in SKIP_SET. */
 size_t
@@ -1677,6 +1709,18 @@ ds_put_unichar (struct string *st, ucs4_t uc)
   st->ss.length += u8_uctomb (CHAR_CAST (uint8_t *, ds_end (st)), uc, 6);
 }
 
+/* Appends N copies of S to ST. */
+void
+ds_put_substring_multiple (struct string *dst, struct substring src, size_t n)
+{
+  char *p = ds_put_uninit (dst, n * src.length);
+  for (size_t i = 0; i < n; i++)
+    {
+      memcpy (p, src.string, src.length);
+      p += src.length;
+    }
+}
+
 /* If relocation has been enabled, replace ST,
    with its relocated version */
 void