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https://github.com/Motorhead1991/qemu.git
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53ee5f551e
Allocate a new, or append to an existing GString instead of using a fixed sized buffer. Require the caller to determine the length of the line -- do not bound len here. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20240412073346.458116-4-richard.henderson@linaro.org>
77 lines
2 KiB
C
77 lines
2 KiB
C
/*
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* Helper to hexdump a buffer
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*
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* Copyright (c) 2013 Red Hat, Inc.
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* Copyright (c) 2013 Gerd Hoffmann <kraxel@redhat.com>
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* Copyright (c) 2013 Peter Crosthwaite <peter.crosthwaite@xilinx.com>
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* Copyright (c) 2013 Xilinx, Inc
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "qemu/osdep.h"
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#include "qemu/cutils.h"
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GString *qemu_hexdump_line(GString *str, const void *vbuf, size_t len)
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{
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const uint8_t *buf = vbuf;
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size_t i;
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if (str == NULL) {
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/* Estimate the length of the output to avoid reallocs. */
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i = len * 3 + len / 4;
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str = g_string_sized_new(i + 1);
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}
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for (i = 0; i < len; i++) {
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if (i != 0 && (i % 4) == 0) {
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g_string_append_c(str, ' ');
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}
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g_string_append_printf(str, " %02x", buf[i]);
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}
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return str;
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}
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static void asciidump_line(char *line, const void *bufptr, size_t len)
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{
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const char *buf = bufptr;
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for (size_t i = 0; i < len; i++) {
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char c = buf[i];
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if (c < ' ' || c > '~') {
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c = '.';
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}
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*line++ = c;
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}
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*line = '\0';
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}
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#define QEMU_HEXDUMP_LINE_BYTES 16
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#define QEMU_HEXDUMP_LINE_WIDTH \
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(QEMU_HEXDUMP_LINE_BYTES * 2 + QEMU_HEXDUMP_LINE_BYTES / 4)
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void qemu_hexdump(FILE *fp, const char *prefix,
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const void *bufptr, size_t size)
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{
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g_autoptr(GString) str = g_string_sized_new(QEMU_HEXDUMP_LINE_WIDTH + 1);
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char ascii[QEMU_HEXDUMP_LINE_BYTES + 1];
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size_t b, len;
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for (b = 0; b < size; b += len) {
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len = MIN(size - b, QEMU_HEXDUMP_LINE_BYTES);
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g_string_truncate(str, 0);
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qemu_hexdump_line(str, bufptr + b, len);
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asciidump_line(ascii, bufptr + b, len);
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fprintf(fp, "%s: %04zx: %-*s %s\n",
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prefix, b, QEMU_HEXDUMP_LINE_WIDTH, str->str, ascii);
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}
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}
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