md5/sha1sum: code shrink

function                                             old     new   delta
hash_file                                            357     279     -78

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/coreutils/md5_sha1_sum.c b/coreutils/md5_sha1_sum.c
index e79210c..d3d294d 100644 (file)
--- a/coreutils/md5_sha1_sum.c
+++ b/coreutils/md5_sha1_sum.c
@@ -10,13 +10,13 @@
 
 /* This is a NOEXEC applet. Be very careful! */
 
-typedef enum {
+enum {
        /* 4th letter of applet_name is... */
        HASH_MD5 = 's', /* "md5>s<um" */
        HASH_SHA1 = '1',
        HASH_SHA256 = '2',
        HASH_SHA512 = '5',
-} hash_algo_t;
+};
 
 #define FLAG_SILENT    1
 #define FLAG_CHECK     2
@@ -32,7 +32,7 @@ static unsigned char *hash_bin_to_hex(unsigned char *hash_value,
        return (unsigned char *)hex_value;
 }
 
-static uint8_t *hash_file(const char *filename /*, hash_algo_t hash_algo*/)
+static uint8_t *hash_file(const char *filename)
 {
        int src_fd, hash_len, count;
        union _ctx_ {
@@ -45,13 +45,15 @@ static uint8_t *hash_file(const char *filename /*, hash_algo_t hash_algo*/)
        RESERVE_CONFIG_UBUFFER(in_buf, 4096);
        void FAST_FUNC (*update)(void*, const void*, size_t);
        void FAST_FUNC (*final)(void*, void*);
-       hash_algo_t hash_algo = applet_name[3];
+       char hash_algo;
 
        src_fd = open_or_warn_stdin(filename);
        if (src_fd < 0) {
                return NULL;
        }
 
+       hash_algo = applet_name[3];
+
        /* figure specific hash algorithims */
        if (ENABLE_MD5SUM && hash_algo == HASH_MD5) {
                md5_begin(&context.md5);
@@ -74,10 +76,10 @@ static uint8_t *hash_file(const char *filename /*, hash_algo_t hash_algo*/)
                final = (void*)sha512_end;
                hash_len = 64;
        } else {
-               bb_error_msg_and_die("algorithm not supported");
+               xfunc_die(); /* can't reach this */
        }
 
-       while (0 < (count = safe_read(src_fd, in_buf, 4096))) {
+       while ((count = safe_read(src_fd, in_buf, 4096)) > 0) {
                update(&context, in_buf, count);
        }
 
@@ -99,27 +101,26 @@ int md5_sha1_sum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
 {
        int return_value = EXIT_SUCCESS;
-       uint8_t *hash_value;
        unsigned flags;
-       /*hash_algo_t hash_algo = applet_name[3];*/
 
        if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
                /* -b "binary", -t "text" are ignored (shaNNNsum compat) */
                flags = getopt32(argv, "scwbt");
+               argv += optind;
+               //argc -= optind;
+       } else {
+               argv += 1;
+               //argc -= 1;
        }
-       else optind = 1;
-       argv += optind;
-       //argc -= optind;
        if (!*argv)
                *--argv = (char*)"-";
 
        if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK && !(flags & FLAG_CHECK)) {
                if (flags & FLAG_SILENT) {
-                       bb_error_msg_and_die
-                               ("-%c is meaningful only when verifying checksums", 's');
-               } else if (flags & FLAG_WARN) {
-                       bb_error_msg_and_die
-                               ("-%c is meaningful only when verifying checksums", 'w');
+                       bb_error_msg_and_die("-%c is meaningful only with -c", 's');
+               }
+               if (flags & FLAG_WARN) {
+                       bb_error_msg_and_die("-%c is meaningful only with -c", 'w');
                }
        }
 
@@ -130,13 +131,13 @@ int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
                char *line;
 
                if (argv[1]) {
-                       bb_error_msg_and_die
-                               ("only one argument may be specified when using -c");
+                       bb_error_msg_and_die("only one argument may be specified with -c");
                }
 
                pre_computed_stream = xfopen_stdin(argv[0]);
 
                while ((line = xmalloc_fgetline(pre_computed_stream)) != NULL) {
+                       uint8_t *hash_value;
                        char *filename_ptr;
 
                        count_total++;
@@ -157,7 +158,7 @@ int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
                        *filename_ptr = '\0';
                        filename_ptr += 2;
 
-                       hash_value = hash_file(filename_ptr /*, hash_algo*/);
+                       hash_value = hash_file(filename_ptr);
 
                        if (hash_value && (strcmp((char*)hash_value, line) == 0)) {
                                if (!(flags & FLAG_SILENT))
@@ -183,7 +184,7 @@ int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
                */
        } else {
                do {
-                       hash_value = hash_file(*argv/*, hash_algo*/);
+                       uint8_t *hash_value = hash_file(*argv);
                        if (hash_value == NULL) {
                                return_value = EXIT_FAILURE;
                        } else {