example1.c

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+// example1.c - Demonstrates miniz.c's compress() and uncompress() functions (same as zlib's).
+// Public domain, May 15 2011, Rich Geldreich, richgel99@gmail.com
+#include "miniz.c"
+
+typedef unsigned char uint8;
+typedef unsigned short uint16;
+typedef unsigned int uint;
+
+// The string to compress.
+static const char *s_pStr = "Good morning Dr. Chandra. This is Hal. I am ready for my first lesson." \
+  "Good morning Dr. Chandra. This is Hal. I am ready for my first lesson." \
+  "Good morning Dr. Chandra. This is Hal. I am ready for my first lesson." \
+  "Good morning Dr. Chandra. This is Hal. I am ready for my first lesson." \
+  "Good morning Dr. Chandra. This is Hal. I am ready for my first lesson." \
+  "Good morning Dr. Chandra. This is Hal. I am ready for my first lesson." \
+  "Good morning Dr. Chandra. This is Hal. I am ready for my first lesson.";
+
+int main(int argc, char *argv[])
+{
+  uint step = 0;
+  int cmp_status;
+  uLong src_len = (uLong)strlen(s_pStr);
+  uLong cmp_len = compressBound(src_len);
+  uLong uncomp_len = src_len;
+  uint8 *pCmp, *pUncomp;
+  uint total_succeeded = 0;
+  argc, argv;
+
+  do
+  {
+    // Allocate buffers to hold compressed and uncompressed data.
+    pCmp = (mz_uint8 *)malloc(cmp_len);
+    pUncomp = (mz_uint8 *)malloc(src_len);
+    if ((!pCmp) || (!pUncomp))
+    {
+      printf("Out of memory!\n");
+      return EXIT_FAILURE;
+    }
+
+    // Compress the string.
+    cmp_status = compress(pCmp, &cmp_len, (const unsigned char *)s_pStr, src_len);
+    if (cmp_status != Z_OK)
+    {
+      printf("compress() failed!\n");
+      free(pCmp);
+      free(pUncomp);
+      return EXIT_FAILURE;
+    }
+
+    printf("Compressed from %u to %u bytes\n", src_len, cmp_len);
+
+    if (step)
+    {
+      // Purposely corrupt the compressed data if fuzzy testing (this is a very crude fuzzy test).
+      uint n = 1 + (rand() % 3);
+      while (n--)
+      {
+        uint i = rand() % cmp_len;
+        pCmp[i] ^= (rand() & 0xFF);
+      }
+    }
+    
+    // Decompress.
+    cmp_status = uncompress(pUncomp, &uncomp_len, pCmp, cmp_len);
+    total_succeeded += (cmp_status == Z_OK);
+    
+    if (step)
+    {
+      printf("Simple fuzzy test: step %u total_succeeded: %u\n", step, total_succeeded);
+    }
+    else
+    {
+      if (cmp_status != Z_OK)
+      {
+        printf("uncompress failed!\n");
+        free(pCmp);
+        free(pUncomp);
+        return EXIT_FAILURE;
+      }
+
+      printf("Decompressed from %u to %u bytes\n", cmp_len, uncomp_len);
+
+      // Ensure uncompress() returned the expected data.
+      if ((uncomp_len != src_len) || (memcmp(pUncomp, s_pStr, src_len)))
+      {
+        printf("Decompression failed!\n");
+        free(pCmp);
+        free(pUncomp);
+        return EXIT_FAILURE;
+      }
+    }
+
+    free(pCmp);
+    free(pUncomp);
+
+    step++;
+    
+    // Keep on fuzzy testing if there's a non-empty command line.
+  } while (argc >= 2);  
+
+  printf("Success.\n");
+  return EXIT_SUCCESS;
+}