diff options
Diffstat (limited to '')
| -rw-r--r-- | src/xxd/xxd.c | 34 |
1 files changed, 11 insertions, 23 deletions
diff --git a/src/xxd/xxd.c b/src/xxd/xxd.c index cf8b4ea..7a3d36a 100644 --- a/src/xxd/xxd.c +++ b/src/xxd/xxd.c @@ -62,6 +62,7 @@ * 17.01.2024 use size_t instead of usigned int for code-generation (-i), #13876 * 25.01.2024 revert the previous patch (size_t instead of unsigned int) * 10.02.2024 fix buffer-overflow when writing color output to buffer, #14003 + * 10.05.2024 fix another buffer-overflow when writing colored output to buffer, #14738 * * (c) 1990-1998 by Juergen Weigert (jnweiger@gmail.com) * @@ -142,7 +143,7 @@ extern void perror __P((char *)); # endif #endif -char version[] = "xxd 2024-02-10 by Juergen Weigert et al."; +char version[] = "xxd 2024-05-10 by Juergen Weigert et al."; #ifdef WIN32 char osver[] = " (Win32)"; #else @@ -205,29 +206,16 @@ char osver[] = ""; /* * LLEN is the maximum length of a line; other than the visible characters * we need to consider also the escape color sequence prologue/epilogue , - * (11 bytes for each character). The most larger format is the default one: - * addr + 1 word for each col/2 + 1 char for each col - * - * addr 1st group 2nd group - * +-------+ +-----------------+ +------+ - * 01234567: 1234 5678 9abc def0 12345678 - * - * - addr: typically 012345678: -> from 10 up to 18 bytes (including trailing - * space) - * - 1st group: 1234 5678 9abc ... -> each byte may be colored, so add 11 - * for each byte - * - space -> 1 byte - * - 2nd group: 12345678 -> each char may be colore so add 11 - * for each byte - * - new line -> 1 byte - * - zero (end line) -> 1 byte + * (11 bytes for each character). */ -#define LLEN (2*(int)sizeof(unsigned long) + 2 + /* addr + ": " */ \ - (11 * 2 + 4 + 1) * (COLS / 2) + /* 1st group */ \ - 1 + /* space */ \ - (1 + 11) * COLS + /* 2nd group */ \ - 1 + /* new line */ \ - 1) /* zero */ +#define LLEN \ + (39 /* addr: ⌈log10(ULONG_MAX)⌉ if "-d" flag given. We assume ULONG_MAX = 2**128 */ \ + + 2 /* ": " */ \ + + 13 * COLS /* hex dump with colors */ \ + + (COLS - 1) /* whitespace between groups if "-g1" option given and "-c" maxed out */ \ + + 2 /* whitespace */ \ + + 12 * COLS /* ASCII dump with colors */ \ + + 2) /* "\n\0" */ char hexxa[] = "0123456789abcdef0123456789ABCDEF", *hexx = hexxa; |