sk1

sk1/compressor.c

@@ -24,6 +24,7 @@ int read_file(const char* filename, unsigned char** data, size_t* size) {
     fclose(file);
     return 0;
 }
+
 int write_file(const char* filename, const unsigned char* data, size_t size) {
     FILE* file = fopen(filename, "wb");
     if (!file) return -1;
@@ -33,23 +34,26 @@ int write_file(const char* filename, const unsigned char* data, size_t size) {
     return 0;
 }
 
-//RLE
+// RLE Compression
 int compress_1(const char* input_file_name, const char* output_file_name) {
     size_t size;
     unsigned char* data;
     if (read_file(input_file_name, &data, &size) != 0) return -1;
-    FILE* output = fopen(output_file_name, "w");
+
+    FILE* output = fopen(output_file_name, "wb");
     if (!output) {
         free(data);
         return -1;
     }
+
     for (size_t i = 0; i < size;) {
         unsigned char byte = data[i];
         size_t count = 1;
         while (i + count < size && data[i + count] == byte && count < 255) {
             count++;
         }
-        fprintf(output, "%c%zu", byte, (int)count);
+        fputc(byte, output);
+        fputc(count, output);
 
         i += count;
     }
@@ -58,12 +62,14 @@ int compress_1(const char* input_file_name, const char* output_file_name) {
     free(data);
     return 0;
 }
+
+// RLE Decompression
 int decompress_1(const char* input_file_name, const char* output_file_name) {
     size_t size;
     unsigned char* data;
     if (read_file(input_file_name, &data, &size) != 0) return -1;
 
-    unsigned char* decompressed = malloc(size * 255);
+    unsigned char* decompressed = malloc(size * 255); // Allocate a large enough buffer
     if (!decompressed) {
         free(data);
         return -1;
@@ -72,21 +78,8 @@ int decompress_1(const char* input_file_name, const char* output_file_name) {
     size_t write_idx = 0;
     for (size_t i = 0; i < size;) {
         unsigned char byte = data[i++];
-        size_t count = 0;
-        while (i < size && isdigit(data[i])) {
-            count = count * 10 + (data[i++] - '0');
-        }
+        unsigned char count = data[i++];
         for (size_t j = 0; j < count; j++) {
-            if (write_idx >= size * 255) {
-                size_t new_size = write_idx * 2;
-                unsigned char* new_buffer = realloc(decompressed, new_size);
-                if (!new_buffer) {
-                    free(decompressed);
-                    free(data);
-                    return -1;
-                }
-                decompressed = new_buffer;
-            }
             decompressed[write_idx++] = byte;
         }
     }
@@ -95,9 +88,8 @@ int decompress_1(const char* input_file_name, const char* output_file_name) {
     free(data);
     free(decompressed);
 
-    return result == 0 ? (int)write_idx : -1;
+    return result == 0 ? 0 : -1;
 }
-
 // LZ78
 int compress_2(const char* input_file_name, const char* output_file_name) {
     unsigned char* data;