From c17752dbf0d4642e8567f36a2188e5979e5ec904 Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Wed, 22 Sep 2021 04:09:21 +0100
Subject: [PATCH] Fix C89.

---
 adler32.c     | 3 ++-
 crc16.c       | 3 ++-
 crc16_ccitt.c | 3 ++-
 fletcher16.c  | 3 ++-
 fletcher32.c  | 3 ++-
 spamsum.c     | 4 +++-
 6 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/adler32.c b/adler32.c
index 0e4e5f9..a061ee6 100644
--- a/adler32.c
+++ b/adler32.c
@@ -38,9 +38,10 @@ AARU_EXPORT adler32_ctx* AARU_CALL adler32_init()
 
 AARU_EXPORT int AARU_CALL adler32_update(adler32_ctx* ctx, const uint8_t* data, uint32_t len)
 {
+    uint32_t i;
     if(!ctx || !data) return -1;
 
-    for(uint32_t i = 0; i < len; i++)
+    for(i = 0; i < len; i++)
     {
         ctx->sum1 = (ctx->sum1 + data[i]) % ADLER_MODULE;
         ctx->sum2 = (ctx->sum2 + ctx->sum1) % ADLER_MODULE;
diff --git a/crc16.c b/crc16.c
index 7a6f42d..86f9144 100644
--- a/crc16.c
+++ b/crc16.c
@@ -35,9 +35,10 @@ AARU_EXPORT crc16_ctx* AARU_CALL crc16_init(void)
 
 AARU_EXPORT int AARU_CALL crc16_update(crc16_ctx* ctx, const uint8_t* data, uint32_t len)
 {
+    uint32_t i;
     if(!ctx || !data) return -1;
 
-    for(uint32_t i = 0; i < len; i++) ctx->crc = (ctx->crc >> 8) ^ crc16_table[data[i] ^ (ctx->crc & 0xFF)];
+    for(i = 0; i < len; i++) ctx->crc = (ctx->crc >> 8) ^ crc16_table[data[i] ^ (ctx->crc & 0xFF)];
 
     return 0;
 }
diff --git a/crc16_ccitt.c b/crc16_ccitt.c
index f7f10eb..9880a01 100644
--- a/crc16_ccitt.c
+++ b/crc16_ccitt.c
@@ -35,9 +35,10 @@ AARU_EXPORT crc16_ccitt_ctx* AARU_CALL crc16_ccitt_init(void)
 
 AARU_EXPORT int AARU_CALL crc16_ccitt_update(crc16_ccitt_ctx* ctx, const uint8_t* data, uint32_t len)
 {
+    uint32_t i;
     if(!ctx || !data) return -1;
 
-    for(uint32_t i = 0; i < len; i++) ctx->crc = crc16_ccitt_table[(ctx->crc >> 8) ^ data[i]] ^ (ctx->crc << 8);
+    for(i = 0; i < len; i++) ctx->crc = crc16_ccitt_table[(ctx->crc >> 8) ^ data[i]] ^ (ctx->crc << 8);
 
     return 0;
 }
diff --git a/fletcher16.c b/fletcher16.c
index a7b4d03..d675699 100644
--- a/fletcher16.c
+++ b/fletcher16.c
@@ -38,9 +38,10 @@ AARU_EXPORT fletcher16_ctx* AARU_CALL fletcher16_init()
 
 AARU_EXPORT int AARU_CALL fletcher16_update(fletcher16_ctx* ctx, const uint8_t* data, uint32_t len)
 {
+    uint32_t i;
     if(!ctx || !data) return -1;
 
-    for(uint32_t i = 0; i < len; i++)
+    for(i = 0; i < len; i++)
     {
         ctx->sum1 = (ctx->sum1 + data[i]) % FLETCHER16_MODULE;
         ctx->sum2 = (ctx->sum2 + ctx->sum1) % FLETCHER16_MODULE;
diff --git a/fletcher32.c b/fletcher32.c
index 81186bc..246bb6d 100644
--- a/fletcher32.c
+++ b/fletcher32.c
@@ -38,9 +38,10 @@ AARU_EXPORT fletcher32_ctx* AARU_CALL fletcher32_init()
 
 AARU_EXPORT int AARU_CALL fletcher32_update(fletcher32_ctx* ctx, const uint8_t* data, uint32_t len)
 {
+    uint32_t i;
     if(!ctx || !data) return -1;
 
-    for(uint32_t i = 0; i < len; i++)
+    for(i = 0; i < len; i++)
     {
         ctx->sum1 = (ctx->sum1 + data[i]) % FLETCHER32_MODULE;
         ctx->sum2 = (ctx->sum2 + ctx->sum1) % FLETCHER32_MODULE;
diff --git a/spamsum.c b/spamsum.c
index 3073fdf..aced371 100644
--- a/spamsum.c
+++ b/spamsum.c
@@ -20,6 +20,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <errno.h>
 
 #include "library.h"
 #include "spamsum.h"
@@ -45,9 +46,10 @@ AARU_EXPORT spamsum_ctx* AARU_CALL spamsum_init(void)
 
 AARU_EXPORT int AARU_CALL spamsum_update(spamsum_ctx* ctx, const uint8_t* data, uint32_t len)
 {
+    int i;
     if(!ctx || !data) return -1;
 
-    for(int i = 0; i < len; i++) fuzzy_engine_step(ctx, data[i]);
+    for( i = 0; i < len; i++) fuzzy_engine_step(ctx, data[i]);
 
     ctx->total_size += len;