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Extend buf2str to allow separator

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This commit is contained in:
Dmitry Rakhchev 2016-07-21 16:52:55 +03:00 committed by Zdenek Styblik
parent f8a711b9e8
commit 9a6ba64651
2 changed files with 57 additions and 12 deletions
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4
include/ipmitool/helper.h
View File

@ -97,7 +97,9 @@ void print_valstr_2col(const struct valstr * vs, const char * title, int logleve
uint16_t buf2short(uint8_t * buf);
uint32_t buf2long(uint8_t * buf);
const char * buf2str(uint8_t * buf, int len);
#define BUF2STR_MAXIMUM_OUTPUT_SIZE (3*1024 + 1)
const char * buf2str_extended(const uint8_t *buf, int len, const char *sep);
const char * buf2str(const uint8_t *buf, int len);
void printbuf(const uint8_t * buf, int len, const char * desc);
uint8_t ipmi_csum(uint8_t * d, int s);
FILE * ipmi_open_file(const char * file, int rw);

65
lib/helper.c
View File

@ -79,24 +79,67 @@ uint16_t buf2short(uint8_t * buf)
return (uint16_t)(buf[1] << 8 | buf[0]);
}
const char * buf2str(uint8_t * buf, int len)
/* buf2str_extended - convert sequence of bytes to hexadecimal string with
* optional separator
*
* @param buf - data to convert
* @param len - size of data
* @param sep - optional separator (can be NULL)
*
* @returns buf representation in hex, possibly truncated to fit
* allocated static memory
*/
const char *
buf2str_extended(const uint8_t *buf, int len, const char *sep)
{
static char str[2049];
static char str[BUF2STR_MAXIMUM_OUTPUT_SIZE];
char *cur;
int i;
int sz;
int left;
int sep_len;
if (len <= 0 || len > 1024)
return NULL;
memset(str, 0, 2049);
for (i=0; i<len; i++)
sprintf(str+i+i, "%2.2x", buf[i]);
str[len*2] = '\0';
if (buf == NULL) {
snprintf(str, sizeof(str), "<NULL>");
return (const char *)str;
}
cur = str;
left = sizeof(str);
if (sep) {
sep_len = strlen(sep);
} else {
sep_len = 0;
}
for (i = 0; i < len; i++) {
/* may return more than 2, depending on locale */
sz = snprintf(cur, left, "%2.2x", buf[i]);
if (sz >= left) {
/* buffer overflow, truncate */
break;
}
cur += sz;
left -= sz;
/* do not write separator after last byte */
if (sep && i != (len - 1)) {
if (sep_len >= left) {
break;
}
strncpy(cur, sep, left - sz);
cur += sep_len;
left -= sep_len;
}
}
*cur = '\0';
return (const char *)str;
}
const char *
buf2str(const uint8_t *buf, int len)
{
return buf2str_extended(buf, len, NULL);
}
void printbuf(const uint8_t * buf, int len, const char * desc)
{
int i;