Libc-1244.50.9.tar.gz

[apple/libc.git] / regex / TRE / lib / tre-match-utils.h

diff --git a/regex/TRE/lib/tre-match-utils.h b/regex/TRE/lib/tre-match-utils.h
index 83258e8060eb1136e7455ff9be456ccead0a9e9b..5d4cd223d1e1c3daedc4d1a2ce5c1c65568c8380 100644 (file)
--- a/regex/TRE/lib/tre-match-utils.h
+++ b/regex/TRE/lib/tre-match-utils.h
@@ -17,6 +17,7 @@
 /* Wide character and multibyte support. */
 
 #ifdef TRE_STR_USER
+#error TRE_STR_USER defined
 #define GET_NEXT_WCHAR()                                                     \
   do {                                                                       \
     prev_c = next_c;                                                         \
@@ -82,30 +83,43 @@
       }                                                                              \
   } while(/*CONSTCOND*/0)
 #else /* !TRE_STR_USER */
+/*
+ * Because all multibyte encodings are exclusively single-shift encoding,
+ * with the shift codes having the high bit set, we can make an optimization
+ * for STR_MBS that only calls tre_mbrtowc_l() when a high-bit character
+ * is detected, and just do a direct copy for ASCII characters.
+ */
 #define GET_NEXT_WCHAR()                                                     \
   do {                                                                       \
     prev_c = next_c;                                                         \
-    if (type == STR_BYTE)                                                    \
+    switch (type)                                                            \
       {                                                                              \
+      case STR_BYTE:                                                         \
        pos++;                                                                \
        if (len >= 0 && pos >= len)                                           \
          next_c = '\0';                                                      \
        else                                                                  \
          next_c = (unsigned char)(*str_byte++);                              \
-      }                                                                              \
-    else if (type == STR_WIDE)                                               \
-      {                                                                              \
+       break;                                                                \
+      case STR_WIDE:                                                         \
        pos++;                                                                \
        if (len >= 0 && pos >= len)                                           \
          next_c = L'\0';                                                     \
        else                                                                  \
          next_c = *str_wide++;                                               \
-      }                                                                              \
-    else if (type == STR_MBS)                                                \
-      {                                                                              \
-        pos += pos_add_next;                                                 \
-       if (str_byte == NULL)                                                 \
-         next_c = L'\0';                                                     \
+       break;                                                                \
+      case STR_MBS:                                                          \
+       pos += pos_add_next;                                                  \
+       if (__builtin_expect(len >= 0 && pos >= len, 0))                      \
+         {                                                                   \
+           next_c = L'\0';                                                   \
+           pos_add_next = 1;                                                 \
+         }                                                                   \
+       else if (__builtin_expect(!(*str_byte & 0x80), 1))                    \
+         {                                                                   \
+           next_c = (unsigned char)(*str_byte++);                            \
+           pos_add_next = 1;                                                 \
+         }                                                                   \
        else                                                                  \
          {                                                                   \
            size_t w;                                                         \
@@ -114,30 +128,23 @@
              max = len - pos;                                                \
            else                                                              \
              max = 32;                                                       \
-           if (max <= 0)                                                     \
+           w = tre_mbrtowc_l(&next_c, str_byte, (size_t)max, &mbstate,       \
+                             tnfa->loc);                                     \
+           if (w == (size_t)-1 || w == (size_t)-2)                           \
+             return REG_ILLSEQ;                                              \
+           if (w == 0 && len >= 0)                                           \
              {                                                               \
-               next_c = L'\0';                                               \
                pos_add_next = 1;                                             \
+               next_c = 0;                                                   \
+               str_byte++;                                                   \
              }                                                               \
            else                                                              \
              {                                                               \
-               w = tre_mbrtowc_l(&next_c, str_byte, (size_t)max, &mbstate,   \
-                                 tnfa->loc);                                 \
-               if (w == (size_t)-1 || w == (size_t)-2)                       \
-                 return REG_ILLSEQ;                                          \
-               if (w == 0 && len >= 0)                                       \
-                 {                                                           \
-                   pos_add_next = 1;                                         \
-                   next_c = 0;                                               \
-                   str_byte++;                                               \
-                 }                                                           \
-               else                                                          \
-                 {                                                           \
-                   pos_add_next = w;                                         \
-                   str_byte += w;                                            \
-                 }                                                           \
+               pos_add_next = w;                                             \
+               str_byte += w;                                                \
              }                                                               \
          }                                                                   \
+       break;                                                                \
       }                                                                              \
   } while(/*CONSTCOND*/0)
 #endif /* !TRE_STR_USER */
@@ -145,6 +152,7 @@
 #else /* !TRE_MULTIBYTE */
 
 /* Wide character support, no multibyte support. */
+#error TRE_MULTIBYTE undefined
 
 #ifdef TRE_STR_USER
 #define GET_NEXT_WCHAR()                                                     \
@@ -201,6 +209,7 @@
 #else /* !TRE_WCHAR */
 
 /* No wide character or multibyte support. */
+#error TRE_WCHAR undefined
 
 #ifdef TRE_STR_USER
 #define GET_NEXT_WCHAR()                                                     \
@@ -614,7 +623,9 @@ tre_bracket_match(tre_bracket_match_list_t * __restrict list, tre_cint_t wc,
          break;
     }
 error:
-  if (list->flags & TRE_BRACKET_MATCH_FLAG_NEGATE)
+  if (list->flags & TRE_BRACKET_MATCH_FLAG_NEGATE) {
+    if ((tnfa->cflags & REG_NEWLINE) && wc == '\n') return 0;
     match = !match;
+  }
   return match;
 }