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libbb: factor out hex2bin() for infiniband address parser

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function                                             old     new   delta
hex2bin                                                -     149    +149
in_ib                                                172      27    -145

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-04-04 15:29:32 +02:00
parent c03602baa4
commit 4836331924
4 changed files with 46 additions and 49 deletions
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2
include/libbb.h
View File

@ -734,6 +734,8 @@ const char *make_human_readable_str(unsigned long long size,
unsigned long block_size, unsigned long display_unit) FAST_FUNC;
/* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
char *bin2hex(char *buf, const char *cp, int count) FAST_FUNC;
/* Reverse */
char* hex2bin(char *dst, const char *str, int count) FAST_FUNC;
/* Generate a UUID */
void generate_uuid(uint8_t *buf) FAST_FUNC;

35
libbb/xfuncs.c
View File

@ -122,6 +122,41 @@ char* FAST_FUNC bin2hex(char *p, const char *cp, int count)
return p;
}
/* Convert "[x]x[:][x]x[:][x]x[:][x]x" hex string to binary, no more than COUNT bytes */
char* FAST_FUNC hex2bin(char *dst, const char *str, int count)
{
errno = EINVAL;
while (*str && count) {
uint8_t val;
uint8_t c = *str++;
if (isdigit(c))
val = c - '0';
else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
val = (c|0x20) - ('a' - 10);
else
return NULL;
val <<= 4;
c = *str;
if (isdigit(c))
val |= c - '0';
else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
val |= (c|0x20) - ('a' - 10);
else if (c == ':' || c == '\0')
val >>= 4;
else
return NULL;
*dst++ = val;
if (c != '\0')
str++;
if (*str == ':')
str++;
count--;
}
errno = (*str ? ERANGE : 0);
return dst;
}
/* Return how long the file at fd is, if there's any way to determine it. */
#ifdef UNUSED
off_t FAST_FUNC fdlength(int fd)

52
networking/interface.c
View File

@ -30,7 +30,6 @@
* 20001008 - Bernd Eckenfels, Patch from RH for setting mtu
* (default AF was wrong)
*/
#include <net/if.h>
#include <net/if_arp.h>
#if (defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1) || defined(_NEWLIB_VERSION)
@ -1215,53 +1214,12 @@ static int if_print(char *ifname)
/* Input an Infiniband address and convert to binary. */
int FAST_FUNC in_ib(const char *bufp, struct sockaddr *sap)
{
unsigned char *ptr;
char c;
const char *orig;
int i;
unsigned val;
sap->sa_family = ib_hwtype.type;
ptr = (unsigned char *) sap->sa_data;
i = 0;
orig = bufp;
while ((*bufp != '\0') && (i < INFINIBAND_ALEN)) {
val = 0;
c = *bufp++;
if (isdigit(c))
val = c - '0';
else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
val = (c|0x20) - ('a' - 10);
else {
errno = EINVAL;
return -1;
}
val <<= 4;
c = *bufp;
if (isdigit(c))
val |= c - '0';
else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
val |= (c|0x20) - ('a' - 10);
else if (c == ':' || c == '\0')
val >>= 4;
else {
errno = EINVAL;
return -1;
}
if (c != '\0')
bufp++;
*ptr++ = (unsigned char) (val & 0377);
i++;
/* We might get a semicolon here - not required. */
if (*bufp == ':') {
bufp++;
}
}
#ifdef DEBUG
fprintf(stderr, "in_ib(%s): %s\n", orig, UNSPEC_print(sap->sa_data));
#endif
//TODO: error check?
hex2bin((char*)sap->sa_data, bufp, INFINIBAND_ALEN);
# ifdef HWIB_DEBUG
fprintf(stderr, "in_ib(%s): %s\n", bufp, UNSPEC_print(sap->sa_data));
# endif
return 0;
}
#endif

6
networking/wget.c
View File

@ -282,8 +282,10 @@ static char *gethdr(char *buf, size_t bufsiz, FILE *fp /*, int *istrunc*/)
return NULL;
/* convert the header name to lower case */
for (s = buf; isalnum(*s) || *s == '-' || *s == '.'; ++s)
*s = tolower(*s);
for (s = buf; isalnum(*s) || *s == '-' || *s == '.'; ++s) {
/* tolower for "A-Z", no-op for "0-9a-z-." */
*s = (*s | 0x20);
}
/* verify we are at the end of the header name */
if (*s != ':')