od: fix -S NUM to not print chars >0x80

function                                             old     new   delta
write_block                                          433     431      -2
print_ascii                                          217     215      -2
check_and_close                                      104      96      -8
od_main                                             2164    2139     -25

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

diff --git a/coreutils/od_bloaty.c b/coreutils/od_bloaty.c
index 96a4186e2cf863a1bd414a5353ab08ac12a93d74..8ed8f0be47309d136ec7d31294192930263b441f 100644 (file)
--- a/coreutils/od_bloaty.c
+++ b/coreutils/od_bloaty.c
@@ -70,7 +70,7 @@ enum {
 
 
 /* Check for 0x7f is a coreutils 6.3 addition */
-#define ISPRINT(c) (((c)>=' ') && (c) != 0x7f)
+#define ISPRINT(c) (((c) >= ' ') && (c) < 0x7f)
 
 typedef long double longdouble_t;
 typedef unsigned long long ulonglong_t;
@@ -176,7 +176,7 @@ struct ERR_width_bytes_has_bad_size {
 
 static smallint exit_code;
 
-static size_t string_min;
+static unsigned string_min;
 
 /* An array of specs describing how to format each input block.  */
 static size_t n_specs;
@@ -514,8 +514,7 @@ check_and_close(void)
        }
 
        if (ferror(stdout)) {
-               bb_error_msg(bb_msg_write_error);
-               exit_code = 1;
+               bb_error_msg_and_die(bb_msg_write_error);
        }
 }
 
@@ -1043,29 +1042,6 @@ dump(off_t current_offset, off_t end_offset)
        free(block[0]);
 }
 
-/* Read a single byte into *C from the concatenation of the input files
-   named in the global array FILE_LIST.  On the first call to this
-   function, the global variable IN_STREAM is expected to be an open
-   stream associated with the input file INPUT_FILENAME.  If IN_STREAM
-   is at end-of-file, close it and update the global variables IN_STREAM
-   and INPUT_FILENAME so they correspond to the next file in the list.
-   Then try to read a byte from the newly opened file.  Repeat if
-   necessary until EOF is reached for the last file in FILE_LIST, then
-   set *C to EOF and return.  Subsequent calls do likewise.  */
-
-static void
-read_char(int *c)
-{
-       while (in_stream) { /* !EOF */
-               *c = fgetc(in_stream);
-               if (*c != EOF)
-                       return;
-               check_and_close();
-               open_next_file();
-       }
-       *c = EOF;
-}
-
 /* Read N bytes into BLOCK from the concatenation of the input files
    named in the global array FILE_LIST.  On the first call to this
    function, the global variable IN_STREAM is expected to be an open
@@ -1089,8 +1065,8 @@ read_char(int *c)
 static void
 dump_strings(off_t address, off_t end_offset)
 {
-       size_t bufsize = MAX(100, string_min);
-       char *buf = xmalloc(bufsize);
+       unsigned bufsize = MAX(100, string_min);
+       unsigned char *buf = xmalloc(bufsize);
 
        while (1) {
                size_t i;
@@ -1106,11 +1082,17 @@ dump_strings(off_t address, off_t end_offset)
                                bufsize += bufsize/8;
                                buf = xrealloc(buf, bufsize);
                        }
-                       read_char(&c);
-                       if (c < 0) { /* EOF */
-                               free(buf);
-                               return;
+
+                       while (in_stream) { /* !EOF */
+                               c = fgetc(in_stream);
+                               if (c != EOF)
+                                       goto got_char;
+                               check_and_close();
+                               open_next_file();
                        }
+                       /* EOF */
+                       goto ret;
+ got_char:
                        address++;
                        if (!c)
                                break;
@@ -1122,8 +1104,7 @@ dump_strings(off_t address, off_t end_offset)
                if (i < string_min)             /* Too short! */
                        goto tryline;
 
-               /* If we get here, the string is all printable and NUL-terminated,
-                * so print it.  It is all in 'buf' and 'i' is its length.  */
+               /* If we get here, the string is all printable and NUL-terminated */
                buf[i] = 0;
                format_address(address - i - 1, ' ');
 
@@ -1144,9 +1125,9 @@ dump_strings(off_t address, off_t end_offset)
 
        /* We reach this point only if we search through
           (max_bytes_to_format - string_min) bytes before reaching EOF.  */
-       free(buf);
-
        check_and_close();
+ ret:
+       free(buf);
 }
 
 #if ENABLE_LONG_OPTS
@@ -1397,7 +1378,7 @@ int od_main(int argc UNUSED_PARAM, char **argv)
        else
                dump(n_bytes_to_skip, end_offset);
 
-       if (fclose(stdin) == EOF)
+       if (fclose(stdin))
                bb_perror_msg_and_die(bb_msg_standard_input);
 
        return exit_code;