Add option -d (decompress) to fpga_compress. Allows testing.

[proxmark3-svn] / client / fpga_compress.c

diff --git a/client/fpga_compress.c b/client/fpga_compress.c
index 5164f6d41bbb6612255d943a0c7cdf5b5cac6ebd..68e9103c9dfab8c0cf590dc3ba0bac74a0934388 100644 (file)
--- a/client/fpga_compress.c
+++ b/client/fpga_compress.c
@@ -45,14 +45,12 @@ static void usage(char *argv0)
 
 static voidpf fpga_deflate_malloc(voidpf opaque, uInt items, uInt size)
 {
-       fprintf(stderr, "zlib requested %d bytes\n", items*size);
        return malloc(items*size);
 }
 
 
 static void fpga_deflate_free(voidpf opaque, voidpf address)
 {
-       fprintf(stderr, "zlib frees memory\n");
        return free(address);
 }
 
@@ -119,7 +117,6 @@ int zlib_compress(FILE *infile[], uint8_t num_infiles, FILE *outfile)
 
        // estimate the size of the compressed output
        unsigned int outsize_max = deflateBound(&compressed_fpga_stream, compressed_fpga_stream.avail_in);
-       fprintf(stderr, "Allocating %ld bytes for output file (estimated upper bound)\n", outsize_max);
        uint8_t *outbuf = malloc(outsize_max);
        compressed_fpga_stream.next_out = outbuf;
        compressed_fpga_stream.avail_out = outsize_max;
@@ -137,7 +134,7 @@ int zlib_compress(FILE *infile[], uint8_t num_infiles, FILE *outfile)
                ret = deflate(&compressed_fpga_stream, Z_FINISH);
        }
        
-       fprintf(stderr, "produced %d bytes of output\n", compressed_fpga_stream.total_out);
+       fprintf(stderr, "\ncompressed %d input bytes to %d output bytes\n", i, compressed_fpga_stream.total_out);
 
        if (ret != Z_STREAM_END) {
                fprintf(stderr, "Error in deflate(): %d %s\n", ret, compressed_fpga_stream.msg);
@@ -170,6 +167,72 @@ int zlib_compress(FILE *infile[], uint8_t num_infiles, FILE *outfile)
 }
 
 
+int zlib_decompress(FILE *infile, FILE *outfile)
+{
+       #define DECOMPRESS_BUF_SIZE 1024
+       uint8_t outbuf[DECOMPRESS_BUF_SIZE];
+       uint8_t inbuf[DECOMPRESS_BUF_SIZE];
+       int ret;
+       
+       z_stream compressed_fpga_stream;
+       // initialize zlib structures
+       compressed_fpga_stream.next_in = inbuf;
+       compressed_fpga_stream.avail_in = 0;
+       compressed_fpga_stream.next_out = outbuf;
+       compressed_fpga_stream.avail_out = DECOMPRESS_BUF_SIZE;
+       compressed_fpga_stream.zalloc = fpga_deflate_malloc;
+       compressed_fpga_stream.zfree = fpga_deflate_free;
+       
+       ret = inflateInit2(&compressed_fpga_stream, 0);
+       
+       do {
+               if (compressed_fpga_stream.avail_in == 0) {
+                       compressed_fpga_stream.next_in = inbuf;
+                       uint16_t i = 0;
+                       do {
+                               uint8_t c = fgetc(infile);
+                               if (!feof(infile)) {
+                                       inbuf[i++] = c;
+                                       compressed_fpga_stream.avail_in++;
+                               } else {
+                                       break;
+                               }
+                       } while (i < DECOMPRESS_BUF_SIZE);
+               }
+
+               ret = inflate(&compressed_fpga_stream, Z_SYNC_FLUSH);
+
+               if (ret != Z_OK && ret != Z_STREAM_END) {
+                       break;
+               }
+
+               if (compressed_fpga_stream.avail_out == 0) {
+                       for (uint16_t i = 0; i < DECOMPRESS_BUF_SIZE; i++) {
+                               fputc(outbuf[i], outfile);
+                       }
+                       compressed_fpga_stream.avail_out = DECOMPRESS_BUF_SIZE;
+                       compressed_fpga_stream.next_out = outbuf;
+               }
+       } while (ret == Z_OK);
+
+       if (ret == Z_STREAM_END) {  // reached end of input
+               uint16_t i = 0;
+               while (compressed_fpga_stream.avail_out < DECOMPRESS_BUF_SIZE) {
+                       fputc(outbuf[i++], outfile);
+                       compressed_fpga_stream.avail_out++;
+               }
+               fclose(outfile);
+               fclose(infile);
+               return 0;
+       } else {
+               fprintf(stderr, "Error. Inflate() returned error %d, %s", ret, compressed_fpga_stream.msg);
+               fclose(outfile);
+               fclose(infile);
+               return -1;
+       }
+       
+}
+
 
 int main(int argc, char **argv)
 {
@@ -181,6 +244,26 @@ int main(int argc, char **argv)
                return -1;
        }
        
+       if (!strcmp(argv[1], "-d")) {
+               infiles = calloc(1, sizeof(FILE*));
+               if (argc != 4) {
+                       usage(argv[0]);
+                       return -1;
+               } 
+               infiles[0] = fopen(argv[2], "rb");
+               if (infiles[0] == NULL) {
+                       fprintf(stderr, "Error. Cannot open input file %s", argv[2]);
+                       return -1;
+               }
+               outfile = fopen(argv[3], "wb");
+               if (outfile == NULL) {
+                       fprintf(stderr, "Error. Cannot open output file %s", argv[3]);
+                       return -1;
+               }
+               return zlib_decompress(infiles[0], outfile);
+       }
+       
+
        infiles = calloc(argc-2, sizeof(FILE*));
        
        for (uint16_t i = 0; i < argc-2; i++) { 
@@ -195,7 +278,7 @@ int main(int argc, char **argv)
        if (outfile == NULL) {
                fprintf(stderr, "Error. Cannot open output file %s", argv[argc-1]);
                return -1;
-               }
+       }
                
        return zlib_compress(infiles, argc-2, outfile);
 }