From: William A. Rowe Jr <wrowe@apache.org>
Date: Sun, 22 Nov 2015 15:28:27 +0000 (+0000)
Subject: Introduce an ascii-like sortation for EBCDIC, case folding US-ASCII alpha only
X-Git-Tag: 2.5.0-alpha~2607
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=02a930c9e0a205994e09ed22cb0ffa71d495a8b2;p=apache

Introduce an ascii-like sortation for EBCDIC, case folding US-ASCII alpha only

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1715632 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/server/util.c b/server/util.c
index aafb68d961..f1215884b9 100644
--- a/server/util.c
+++ b/server/util.c
@@ -3172,9 +3172,11 @@ AP_DECLARE(int) ap_array_str_contains(const apr_array_header_t *array,
     return (ap_array_str_index(array, s, 0) >= 0);
 }
 
+#if !APR_CHARSET_EBCDIC
 /*
  * Provide our own known-fast implementation of str[n]casecmp()
- * NOTE: ASCII only!
+ * NOTE: Only ASCII alpha characters 41-5A are folded to 61-7A,
+ * other 8-bit latin alphabetics are never case-folded!
  */
 static const unsigned char ucharmap[] = {
     0x0,  0x1,  0x2,  0x3,  0x4,  0x5,  0x6,  0x7,
@@ -3211,6 +3213,52 @@ static const unsigned char ucharmap[] = {
     0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
 };
 
+#else /* APR_CHARSET_EBCDIC */
+/* Derived from apr-iconv/ccs/cp037.c for EBCDIC case comparison,
+   provides unique identity of every char value (strict ISO-646
+   conformance, arbitrary election of an ISO-8859-1 ordering, and
+   very arbitrary control code assignments into C1 to achieve
+   identity and a reversible mapping of code points),
+   then folding the equivalences of ASCII 41-5A into 61-7A, 
+   presenting comparison results in a somewhat ISO/IEC 10646
+   (ASCII-like) order, depending on the EBCDIC code page in use.
+ */
+static const unsigned char ucharmap[] = {
+	0x00, 0x01, 0x02, 0x03, 0x9C, 0x09, 0x86, 0x7F,
+	0x97, 0x8D, 0x8E, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
+	0x10, 0x11, 0x12, 0x13, 0x9D, 0x85, 0x08, 0x87,
+	0x18, 0x19, 0x92, 0x8F, 0x1C, 0x1D, 0x1E, 0x1F,
+	0x80, 0x81, 0x82, 0x83, 0x84, 0x0A, 0x17, 0x1B,
+	0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x05, 0x06, 0x07,
+	0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
+	0x98, 0x99, 0x9A, 0x9B, 0x14, 0x15, 0x9E, 0x1A,
+	0x20, 0xA0, 0xE2, 0xE4, 0xE0, 0xE1, 0xE3, 0xE5,
+	0xE7, 0xF1, 0xA2, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
+	0x26, 0xE9, 0xEA, 0xEB, 0xE8, 0xED, 0xEE, 0xEF,
+	0xEC, 0xDF, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0xAC,
+	0x2D, 0x2F, 0xC2, 0xC4, 0xC0, 0xC1, 0xC3, 0xC5,
+	0xC7, 0xD1, 0xA6, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
+	0xF8, 0xC9, 0xCA, 0xCB, 0xC8, 0xCD, 0xCE, 0xCF,
+	0xCC, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
+	0xD8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+	0x68, 0x69, 0xAB, 0xBB, 0xF0, 0xFD, 0xFE, 0xB1,
+	0xB0, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
+	0x71, 0x72, 0xAA, 0xBA, 0xE6, 0xB8, 0xC6, 0xA4,
+	0xB5, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
+	0x79, 0x7A, 0xA1, 0xBF, 0xD0, 0xDD, 0xDE, 0xAE,
+	0x5E, 0xA3, 0xA5, 0xB7, 0xA9, 0xA7, 0xB6, 0xBC,
+	0xBD, 0xBE, 0x5B, 0x5D, 0xAF, 0xA8, 0xB4, 0xD7,
+	0x7B, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+	0x68, 0x69, 0xAD, 0xF4, 0xF6, 0xF2, 0xF3, 0xF5,
+	0x7D, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
+	0x71, 0x72, 0xB9, 0xFB, 0xFC, 0xF9, 0xFA, 0xFF,
+	0x5C, 0xF7, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
+	0x79, 0x7A, 0xB2, 0xD4, 0xD6, 0xD2, 0xD3, 0xD5,
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+	0x38, 0x39, 0xB3, 0xDB, 0xDC, 0xD9, 0xDA, 0x9F
+};
+#endif
+
 AP_DECLARE(int) ap_strcasecmp(const char *s1, const char *s2)
 {
     const unsigned char *ps1 = (const unsigned char *) s1;