From bf1dbab139072296360e6ed3610870f8ea4155d7 Mon Sep 17 00:00:00 2001
From: Iru Cai <mytbk920423@gmail.com>
Date: Tue, 20 Nov 2018 16:59:38 +0800
Subject: use the original MT19937 code

---
 source/pdf/pdf-crypt.c | 85 --------------------------------------------------
 1 file changed, 85 deletions(-)

diff --git a/source/pdf/pdf-crypt.c b/source/pdf/pdf-crypt.c
index 5341bff7..b5a96c1b 100644
--- a/source/pdf/pdf-crypt.c
+++ b/source/pdf/pdf-crypt.c
@@ -15,65 +15,6 @@ typedef struct
 
 static void fcn_40c060(mt19937 *ctx)
 {
-	uint32_t eax, ecx, edx;
-	ecx = 227;
-	uint32_t *edi_ptr = &ctx->MT[624];
-
-	do {
-		edx = edi_ptr[1];
-		edi_ptr++;
-		edx ^= edi_ptr[-1];
-		edx &= 0x7fffffff;
-		edx ^= edi_ptr[-1];
-		eax = edx & 1;
-		if (eax)
-			eax = 0x9908b0df;
-		else
-			eax = 0;
-		edx >>= 1;
-		eax ^= edi_ptr[396];
-		eax ^= edx;
-		edi_ptr[-625] = eax;
-		ecx--;
-	} while (ecx);
-
-	uint32_t *esi = ctx->MT[851];
-
-	int edi = 396;
-	do {
-		uint32_t ecx = esi[0];
-		esi++;
-		ecx ^= esi[0];
-		ecx &= 0x7fffffff;
-		ecx ^= esi[-1];
-		uint32_t eax = ecx & 1;
-		if (eax) {
-			eax = 0x9908b0df;
-		} else {
-			eax = 0;
-		}
-		ecx >>= 1;
-		eax ^= esi[-852];
-		eax ^= ecx;
-		esi[-625] = eax;
-		edi--;
-	} while (edi);
-
-	ecx = ctx->MT[1247] ^ ctx->MT[0];
-	ecx &= 0x7fffffff;
-	ecx ^= ctx->MT[1247];
-	eax = ecx & 1;
-	if (eax) {
-		eax = 0x9908b0df;
-	} else {
-		eax = 0;
-	}
-	ecx >>= 1;
-	eax ^= ctx->MT[396];
-	eax ^= ecx;
-	ctx->MT[623] = eax;
-	ctx->n = edi;
-#if 0
 	uint32_t *edi = &ctx->MT[624];
 	uint32_t eax, ecx, edx;
 
@@ -111,35 +52,10 @@ static void fcn_40c060(mt19937 *ctx)
 	ecx >>= 1;
 	ctx->MT[623] = eax ^ ctx->MT[396] ^ ecx;
 	ctx->n = 0;
-#endif
 }
 
 static void fcn_40c120(mt19937* ctx)
 {
-	uint32_t * eax = &ctx->MT[1];
-	uint32_t esi = 624;
-	uint32_t ecx, edx;
-
-	do {
-		edx = eax[-1];
-		eax++;
-		edx ^= eax[-1];
-		edx &= 0x7fffffff;
-		edx ^= eax[-2];
-		ecx = edx & 1;
-		if (ecx) {
-			ecx = 0x9908b0df;
-		} else {
-			ecx = 0;
-		}
-		edx >>= 1;
-		ecx ^= eax[395];
-		ecx ^= edx;
-		eax[622] = ecx;
-		esi--;
-	} while (esi);
-
-#if 0
 	uint32_t *mt = ctx->MT;
 	uint32_t ecx, edx;
 
@@ -158,7 +74,6 @@ static void fcn_40c120(mt19937* ctx)
 
 		mt[i + 624] = ecx;
 	}
-#endif
 }
 
 uint32_t mt19937_next(mt19937 *ctx)
-- 
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