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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 <alexandrux.gagniuc@intel.com>
Reviewed-on: https://review.coreboot.org/12872
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Alexandru Gagniuc 2015-10-14 09:56:28 -07:00 committed by Patrick Georgi
parent 95f33f4e7e
commit dc6c43182e
1 changed files with 25 additions and 20 deletions
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45
src/lib/hexdump.c
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@ -23,39 +23,44 @@ static int isprint(int c)
void hexdump(const void *memory, size_t length) void hexdump(const void *memory, size_t length)
{ {
int i; int i;
uint8_t *m; uint8_t *line;
int all_zero = 0; int all_zero = 0;
int all_one = 0;
m = (uint8_t *) memory; size_t num_bytes;
for (i = 0; i < length; i += 16) { for (i = 0; i < length; i += 16) {
int j; int j;
int left = MIN(length - i, 16); num_bytes = MIN(length - i, 16);
line = ((uint8_t *)memory) + i;
if (left < 16) { all_zero++;
all_zero = 0; all_one++;
} else { for (j = 0; j < num_bytes; j++) {
all_zero++; if (line[j] != 0) {
for (j = 0; j < 16; j++) { all_zero = 0;
if (m[i + j] != 0) { break;
all_zero = 0;
break;
}
} }
} }
if (all_zero < 2) { for (j = 0; j < num_bytes; j++) {
if (line[j] != 0xff) {
all_one = 0;
break;
}
}
if ((all_zero < 2) && (all_one < 2)) {
printk(BIOS_DEBUG, "%p:", memory + i); printk(BIOS_DEBUG, "%p:", memory + i);
for (j = 0; j < left; j++) for (j = 0; j < num_bytes; j++)
printk(BIOS_DEBUG, " %02x", m[i + j]); printk(BIOS_DEBUG, " %02x", line[j]);
for (j = left; j < 16; j++) for (; j < 16; j++)
printk(BIOS_DEBUG, " "); printk(BIOS_DEBUG, " ");
printk(BIOS_DEBUG, " "); printk(BIOS_DEBUG, " ");
for (j = 0; j < left; j++) for (j = 0; j < num_bytes; j++)
printk(BIOS_DEBUG, "%c", printk(BIOS_DEBUG, "%c",
isprint(m[i + j]) ? m[i + j] : '.'); isprint(line[j]) ? line[j] : '.');
printk(BIOS_DEBUG, "\n"); printk(BIOS_DEBUG, "\n");
} else if (all_zero == 2) { } else if ((all_zero == 2) || (all_one == 2)) {
printk(BIOS_DEBUG, "...\n"); printk(BIOS_DEBUG, "...\n");
} }
} }