Replaced adler32.c with adler32.pypython-adler32

The task is rather easier in Python and this way we have a ready to run
script instead of a tool that needs compilation first. Execution speed
is about the same.

Goodbye little C program, we had a good time!

4 files changed, 23 insertions, 88 deletions

diff --git a/.gitignore b/.gitignore
index 4c5843f..b30a657 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,5 @@
 /aligncsv
 *.pyc
-/client/adler32
 /client/commit.txt
 /client/musiccommit.txt
 /client/files
diff --git a/client/adler32.c b/client/adler32.c
deleted file mode 100644
index 606c739..0000000
--- a/client/adler32.c
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * adler32.c (c) 2006 Bjorn Lindeijer
- * License: GPL, v2 or later
- *
- * Calculates Adler-32 checksums for all files passed as argument.
- *
- *  Usage: adler32 [file]...
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <zlib.h>
-
-/**
- * Calculates the Adler-32 checksum for the given file.
- */
-unsigned long fadler32(FILE *file)
-{
-    // Obtain file size
-    fseek(file, 0, SEEK_END);
-    long fileSize = ftell(file);
-    rewind(file);
-
-    // Calculate Adler-32 checksum
-    char *buffer = (char*) malloc(fileSize);
-    fread(buffer, 1, fileSize, file);
-    unsigned long adler = adler32(0L, Z_NULL, 0);
-    adler = adler32(adler, (Bytef*) buffer, fileSize);
-    free(buffer);
-
-    return adler;
-}
-
-/**
- * Prints out usage and exists.
- */
-void print_usage()
-{
-    printf("Usage: adler32 mode [file]...\n");
-    exit(0);
-}
-
-int main(int argc, char *argv[])
-{
-    int i;                            /**< Loops through arguments. */
-
-    if (argc < 2)
-    {
-        print_usage();
-    }
-
-    int mode = atoi(argv[1]);
-
-    for (i = 2; i < argc; ++i)
-    {
-        FILE *file = fopen(argv[i], "r");
-
-        if (!file)
-        {
-            printf("Error while opening '%s' for reading!\n", argv[i]);
-            exit(1);
-        }
-
-        unsigned long adler = fadler32(file);
-        switch (mode)
-        {
-            case 0:
-            default:
-                printf("%s %lx\n", argv[i], adler);
-                break;
-            case 1:
-                printf("%lx", adler);
-                break;
-        }
-        fclose(file);
-    }
-
-    return 0;
-}
diff --git a/client/adler32.py b/client/adler32.py
new file mode 100755
index 0000000..65260e0
--- /dev/null
+++ b/client/adler32.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+import sys
+import zlib
+
+def adler32(file):
+    with open(file, 'rb') as f:
+        checksum = zlib.adler32(f.read())
+    return f'{checksum:08x}'
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print(f"Usage: {sys.argv[0]} <file1> [file2] [file3] ...")
+        sys.exit(1)
+
+    for filename in sys.argv[1:]:
+        try:
+            print(adler32(filename))
+        except IOError as e:
+            print(f"Error: Could not read file '{filename}' - {e}")
+            sys.exit(1)
diff --git a/client/make-updates.sh b/client/make-updates.sh
index dba3bde..0991e3e 100755
--- a/client/make-updates.sh
+++ b/client/make-updates.sh
@@ -7,7 +7,6 @@ dir=`pwd`
 UPDATE_DIR=${UPDATE_DIR:=~/www/updates}
 cdata=../../client-data
 UPDATE_HTTP=${UPDATE_HTTP:="http://updates.themanaworld.org/updates"}
-CC=${CC:=gcc}
 
 function check_update() {
     test_command=`           \
@@ -40,10 +39,6 @@ trap finish EXIT
 
 echo -e "\e[105m======= Legacy =======\e[0m"
 
-echo -e "\e[96m>> Building adler32...\e[0m"
-rm -f adler32 2>/dev/null || :
-$CC adler32.c -lz -o adler32
-
 echo -e "\e[96m>> Creating directory tree...\e[0m"
 mkdir -pv files
 mkdir -pv $UPDATE_DIR
@@ -76,9 +71,9 @@ touch $dir/files/TMW-mods.zip
 
 echo -e "\e[96m>> Calculating adler32 checksum...\e[0m"
 pushd $dir/files &>/dev/null
-sum=`../adler32 1 TMW.zip`
-musicsum=`../adler32 1 TMW-music.zip`
-modsum=`../adler32 1 TMW-mods.zip`
+sum=`../adler32.py TMW.zip`
+musicsum=`../adler32.py TMW-music.zip`
+modsum=`../adler32.py TMW-mods.zip`
 
 echo -e "\e[96m>> Generating xml file...\e[0m"
 echo "<?xml version=\"1.0\"?><updates>" >resources.xml