feat:replace boost library with C++11 std library

2020-04-01 20:53:55 +08:00
parent 6d06233944
commit d3258bbd97
1936 changed files with 241862 additions and 60153 deletions
@@ -0,0 +1,149 @@
+/* -*- mode: c; c-file-style: "k&r" -*-
+
+  strnatcmp.c -- Perform 'natural order' comparisons of strings in C.
+  Copyright (C) 2000 by Martin Pool <mbp@humbug.org.au>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include <ctype.h>
+#include <string.h>
+#include "apr_strings.h"
+#include "apr_lib.h"            /* for apr_is*() */
+
+#if defined(__GNUC__)
+#  define UNUSED __attribute__((__unused__))
+#else
+#  define UNUSED
+#endif
+
+/* based on "strnatcmp.c,v 1.6 2000/04/20 07:30:11 mbp Exp $" */
+
+static int
+compare_right(char const *a, char const *b)
+{
+     int bias = 0;
+     
+     /* The longest run of digits wins.  That aside, the greatest
+	value wins, but we can't know that it will until we've scanned
+	both numbers to know that they have the same magnitude, so we
+	remember it in BIAS. */
+     for (;; a++, b++) {
+	  if (!apr_isdigit(*a)  &&  !apr_isdigit(*b))
+	       break;
+	  else if (!apr_isdigit(*a))
+	       return -1;
+	  else if (!apr_isdigit(*b))
+	       return +1;
+	  else if (*a < *b) {
+	       if (!bias)
+		    bias = -1;
+	  } else if (*a > *b) {
+	       if (!bias)
+		    bias = +1;
+	  } else if (!*a  &&  !*b)
+	       break;
+     }
+
+     return bias;
+}
+
+
+static int
+compare_left(char const *a, char const *b)
+{
+     /* Compare two left-aligned numbers: the first to have a
+        different value wins. */
+     for (;; a++, b++) {
+	  if (!apr_isdigit(*a)  &&  !apr_isdigit(*b))
+	       break;
+	  else if (!apr_isdigit(*a))
+	       return -1;
+	  else if (!apr_isdigit(*b))
+	       return +1;
+	  else if (*a < *b)
+	       return -1;
+	  else if (*a > *b)
+	       return +1;
+     }
+	  
+     return 0;
+}
+
+
+static int strnatcmp0(char const *a, char const *b, int fold_case)
+{
+     int ai, bi;
+     char ca, cb;
+     int fractional, result;
+     ai = bi = 0;
+     while (1) {
+	  ca = a[ai]; cb = b[bi];
+
+	  /* skip over leading spaces or zeros */
+	  while (apr_isspace(ca))
+	       ca = a[++ai];
+
+	  while (apr_isspace(cb))
+	       cb = b[++bi];
+
+	  /* process run of digits */
+	  if (apr_isdigit(ca)  &&  apr_isdigit(cb)) {
+	       fractional = (ca == '0' || cb == '0');
+
+	       if (fractional) {
+		    if ((result = compare_left(a+ai, b+bi)) != 0)
+			 return result;
+	       } else {
+		    if ((result = compare_right(a+ai, b+bi)) != 0)
+			 return result;
+	       }
+	  }
+
+	  if (!ca && !cb) {
+	       /* The strings compare the same.  Perhaps the caller
+                  will want to call strcmp to break the tie. */
+	       return 0;
+	  }
+
+	  if (fold_case) {
+	       ca = apr_toupper(ca);
+	       cb = apr_toupper(cb);
+	  }
+	  
+	  if (ca < cb)
+	       return -1;
+	  else if (ca > cb)
+	       return +1;
+
+	  ++ai; ++bi;
+     }
+}
+
+
+
+APR_DECLARE(int) apr_strnatcmp(char const *a, char const *b)
+{
+     return strnatcmp0(a, b, 0);
+}
+
+
+/* Compare, recognizing numeric string and ignoring case. */
+APR_DECLARE(int) apr_strnatcasecmp(char const *a, char const *b)
+{
+     return strnatcmp0(a, b, 1);
+}