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util/hexdump: Use a GString for qemu_hexdump_line

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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>
This commit is contained in:
Richard Henderson 2024-04-12 00:33:22 -07:00
parent f1572ab947
commit 53ee5f551e
3 changed files with 34 additions and 22 deletions
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15
include/qemu/cutils.h
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@ -282,12 +282,17 @@ static inline const char *yes_no(bool b)
*/
int parse_debug_env(const char *name, int max, int initial);
/*
* Hexdump a line of a byte buffer into a hexadecimal/ASCII buffer
/**
* qemu_hexdump_line:
* @str: GString into which to append
* @buf: buffer to dump
* @len: number of bytes to dump
*
* Append @len bytes of @buf as hexadecimal into @str.
* If @str is NULL, allocate a new string and return it;
* otherwise return @str.
*/
#define QEMU_HEXDUMP_LINE_BYTES 16 /* Number of bytes to dump */
#define QEMU_HEXDUMP_LINE_LEN 75 /* Number of characters in line */
void qemu_hexdump_line(char *line, const void *bufptr, size_t len);
GString *qemu_hexdump_line(GString *str, const void *buf, size_t len);
/*
* Hexdump a buffer to a file. An optional string prefix is added to every line