switching on bits of just the start char won't work ;)

[m6w6/ext-http] / scripts / gen_if_utf8.php

diff --git a/scripts/gen_if_utf8.php b/scripts/gen_if_utf8.php
new file mode 100755 (executable)
index 0000000..720a5a9
--- /dev/null
+++ b/scripts/gen_if_utf8.php
@@ -0,0 +1,92 @@
+#!/usr/bin/env php
+<?php
+
+error_reporting(E_ALL);
+set_error_handler(function($c, $e, $f, $l) {
+       throw new Exception("$e in $f on line $l");
+});
+
+$i18n = $argc >= 2 ? $argv[1] : "/usr/share/i18n/locales/i18n";
+
+$f = fopen($i18n, "r");
+$c = false;
+$a = false;
+
+ob_start(null, 0xfffff);
+
+while (!feof($f)) {
+       $line = fgets($f);
+       if (!$c && $line !== "LC_CTYPE\n") {
+               continue;
+       }
+       $c = true;
+       if ($line === "END LC_CTYPE\n") {
+               break;
+       }
+       switch($line{0}) {
+       case "%":
+               break;
+       case "\n":
+               if ($a) {
+                       break 2;
+               }
+               break;
+       case " ":
+               if ($a) {
+                       foreach (explode(";", trim($line, "\n/ ;")) as $ranges) {
+                               $range = explode("..", $ranges);
+                               $step = 0;
+                               $end = 0;
+                               switch (count($range)) {
+                               case 3:
+                                       list($sstart, $sstep, $send) = $range;
+                                       sscanf($sstart, "<U%X>", $start);
+                                       sscanf($sstep, "(%d)", $step);
+                                       sscanf($send, "<U%X>", $end);
+
+                                       break;
+                               case 2:
+                                       list($sstart, $send) = $range;
+                                       $step = 1;
+                                       sscanf($sstart, "<U%X>", $start);
+                                       sscanf($send, "<U%X>", $end);
+                                       break;
+                               case 1:
+                                       list($sstart) = $range;
+                                       sscanf($sstart, "<U%X>", $start);
+                                       break;
+                               }
+                               $r[]=[$start,$end,$step];
+                       }
+               }
+               break;
+       default:
+               if ($a) {
+                       break 2;
+               } elseif ($line === "alpha /\n") {
+                       $a = true;
+               }
+               break;
+       }
+}
+function sp($sp, $ch = " ") { return str_repeat($ch, $sp); }
+$sp = 1;
+foreach ($r as list($start, $end, $step)) {
+       if ($end) {
+               if ($step > 1) {
+                       die("\nUNEXPECTED: step>1\n");
+                       printf("\tfor (i=0x%08X; i <= 0x%08X; i+= %d) { if (i == ch) return 1; }\n", $start, $end, $step);
+               } else {
+                       //printf(" if (ch >= 0x%08X && ch <= 0x%08X) return 1;\n", $start, $end);
+                       printf("%sif (ch >= 0x%08X) {\n", sp($sp), $start);
+                       printf("%sif (ch <= 0x%08X) return 1;\n", sp(++$sp), $end);
+               }
+       } else {
+               printf("%sif (ch == 0x%08X) return 1;\n", sp($sp), $start);
+       }
+}
+printf("  %s\n", sp($sp-1, "}"));
+
+file_put_contents("php_http_utf8.h",
+       preg_replace('/(\/\* BEGIN::UTF8SWITCH \*\/\n).*(\n\s*\/\* END::UTF8SWITCH \*\/)/s', '$1'. ob_get_contents() .'$2',
+               file_get_contents("php_http_utf8.h")));