example4.c

@@ -0,0 +1,90 @@
+// example4.c - Uses tinfl.c to decompress a zlib stream in memory to an output file
+// Public domain, May 15 2011, Rich Geldreich, richgel99@gmail.com
+#include "tinfl.c"
+#include <stdio.h>
+
+typedef unsigned char uint8;
+typedef unsigned short uint16;
+typedef unsigned int uint;
+
+#define my_max(a,b) (((a) > (b)) ? (a) : (b))
+#define my_min(a,b) (((a) < (b)) ? (a) : (b))
+
+static int tinfl_put_buf_func(const void* pBuf, int len, void *pUser)
+{
+  return len == (int)fwrite(pBuf, 1, len, (FILE*)pUser);
+}
+
+int main(int argc, char *argv[])
+{
+  int status;
+  FILE *pInfile, *pOutfile;
+  uint infile_size, outfile_size;
+  size_t in_buf_size;
+  uint8 *pCmp_data;
+          
+  if (argc != 3)
+  {
+    printf("Usage: example4 infile outfile\n");
+    printf("Decompresses zlib stream in file infile to file outfile.\n");
+    printf("Input file must be able to fit entirely in memory.\n");
+    return EXIT_FAILURE;
+  }
+
+  // Open input file.
+  pInfile = fopen(argv[1], "rb");
+  if (!pInfile)
+  {
+    printf("Failed opening input file!\n");
+    return EXIT_FAILURE;
+  }
+  
+  // Determine input file's size.
+  fseek(pInfile, 0, SEEK_END);
+  infile_size = ftell(pInfile);
+  fseek(pInfile, 0, SEEK_SET);
+
+  pCmp_data = (uint8 *)malloc(infile_size);
+  if (!pCmp_data)
+  {
+    printf("Out of memory!\n");
+    return EXIT_FAILURE;
+  }
+  if (fread(pCmp_data, 1, infile_size, pInfile) != infile_size)
+  {
+    printf("Failed reading input file!\n");
+    return EXIT_FAILURE;
+  }
+
+  // Open output file.
+  pOutfile = fopen(argv[2], "wb");
+  if (!pOutfile)
+  {
+    printf("Failed opening output file!\n");
+    return EXIT_FAILURE;
+  }
+
+  printf("Input file size: %u\n", infile_size);
+    
+  in_buf_size = infile_size;
+  status = tinfl_decompress_mem_to_callback(pCmp_data, &in_buf_size, tinfl_put_buf_func, pOutfile, TINFL_FLAG_PARSE_ZLIB_HEADER);
+  if (!status)
+  {
+    printf("tinfl_decompress_mem_to_callback() failed with status %i!\n", status);
+    return EXIT_FAILURE;
+  }
+
+  outfile_size = ftell(pOutfile);
+
+  fclose(pInfile);
+  if (EOF == fclose(pOutfile))
+  {
+    printf("Failed writing to output file!\n");
+    return EXIT_FAILURE;
+  }
+
+  printf("Total input bytes: %u\n", (uint)in_buf_size);
+  printf("Total output bytes: %u\n", outfile_size);
+  printf("Success.\n");
+  return EXIT_SUCCESS;
+}