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spi: spidev_test: Improve decoded text part of hex dump

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- Print spaces as spaces,
  - Do not print characters > 126, as they will be shown as garbage
    in the modern UTF-8 era,
  - Use a normal period instead of its hexadecimal ASCII value,
  - Delimit the text part with pipe symbols on both sides (was left side
    only), without any spaces, to make it clear where the decoded text
    starts and ends,
  - Drop a useless comment.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Geert Uytterhoeven 2018-09-03 19:33:23 +02:00 • committed by Mark Brown
parent 3806112c9e
commit 35386dfd13
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GPG key ID: 24D68B725D5487D0
1 changed files with 3 additions and 3 deletions
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6
tools/spi/spidev_test.c
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@ -73,12 +73,12 @@ static void hex_dump(const void *src, size_t length, size_t line_size,
while (i++ % line_size)
printf("__ ");
}
printf(" | "); /* right close */
printf(" |");
while (line < address) {
c = *line++;
printf("%c", (c < 33 || c == 255) ? 0x2E : c);
printf("%c", (c < 32 || c > 126) ? '.' : c);
}
printf("\n");
printf("|\n");
if (length > 0)
printf("%s | ", prefix);
}