From dc6c43182eb0fd7049d06659119a6bd99c76962e Mon Sep 17 00:00:00 2001 From: Alexandru Gagniuc Date: Wed, 14 Oct 2015 09:56:28 -0700 Subject: lib/hexdump: Refactor to skip lines with all ones as well We already do this for lines with all zeroes, so it makes sense to treat all ones the same, for symmetry. Change-Id: I4b637b07a49e0c649331aa200995b474dd9a2682 Signed-off-by: Alexandru Gagniuc Reviewed-on: https://review.coreboot.org/12872 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/lib/hexdump.c | 45 +++++++++++++++++++++++++-------------------- 1 file changed, 25 insertions(+), 20 deletions(-) (limited to 'src') diff --git a/src/lib/hexdump.c b/src/lib/hexdump.c index 7907a381b5..2861d6321e 100644 --- a/src/lib/hexdump.c +++ b/src/lib/hexdump.c @@ -23,39 +23,44 @@ static int isprint(int c) void hexdump(const void *memory, size_t length) { int i; - uint8_t *m; + uint8_t *line; int all_zero = 0; - - m = (uint8_t *) memory; + int all_one = 0; + size_t num_bytes; for (i = 0; i < length; i += 16) { int j; - int left = MIN(length - i, 16); + num_bytes = MIN(length - i, 16); + line = ((uint8_t *)memory) + i; + + all_zero++; + all_one++; + for (j = 0; j < num_bytes; j++) { + if (line[j] != 0) { + all_zero = 0; + break; + } + } - if (left < 16) { - all_zero = 0; - } else { - all_zero++; - for (j = 0; j < 16; j++) { - if (m[i + j] != 0) { - all_zero = 0; - break; - } + for (j = 0; j < num_bytes; j++) { + if (line[j] != 0xff) { + all_one = 0; + break; } } - if (all_zero < 2) { + if ((all_zero < 2) && (all_one < 2)) { printk(BIOS_DEBUG, "%p:", memory + i); - for (j = 0; j < left; j++) - printk(BIOS_DEBUG, " %02x", m[i + j]); - for (j = left; j < 16; j++) + for (j = 0; j < num_bytes; j++) + printk(BIOS_DEBUG, " %02x", line[j]); + for (; j < 16; j++) printk(BIOS_DEBUG, " "); printk(BIOS_DEBUG, " "); - for (j = 0; j < left; j++) + for (j = 0; j < num_bytes; j++) printk(BIOS_DEBUG, "%c", - isprint(m[i + j]) ? m[i + j] : '.'); + isprint(line[j]) ? line[j] : '.'); printk(BIOS_DEBUG, "\n"); - } else if (all_zero == 2) { + } else if ((all_zero == 2) || (all_one == 2)) { printk(BIOS_DEBUG, "...\n"); } } -- cgit v1.2.3