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[MINOR] standard: add read_uint() to parse a delimited unsigned integer

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This function parses an integer and returns it along with the pointer to the
next char not part of the number.
This commit is contained in:
Willy Tarreau 2010-10-15 23:19:55 +02:00
parent 8a95691ae8
commit 4ec83cd939
2 changed files with 28 additions and 0 deletions
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23
include/common/standard.h
View File

@ -271,6 +271,28 @@ static inline unsigned int __strl2uic(const char *s, int len)
return i;
}
/* This function reads an unsigned integer from the string pointed to by <s>
* and returns it. The <s> pointer is adjusted to point to the first unread
* char. The function automatically stops at <end>.
*/
static inline unsigned int __read_uint(const char **s, const char *end)
{
const char *ptr = *s;
unsigned int i = 0;
unsigned int j, k;
while (ptr < end) {
j = *ptr - '0';
k = i * 10;
if (j > 9)
break;
i = k + j;
ptr++;
}
*s = ptr;
return i;
}
extern unsigned int str2ui(const char *s);
extern unsigned int str2uic(const char *s);
extern unsigned int strl2ui(const char *s, int len);
@ -278,6 +300,7 @@ extern unsigned int strl2uic(const char *s, int len);
extern int strl2ic(const char *s, int len);
extern int strl2irc(const char *s, int len, int *ret);
extern int strl2llrc(const char *s, int len, long long *ret);
extern unsigned int read_uint(const char **s, const char *end);
unsigned int inetaddr_host(const char *text);
unsigned int inetaddr_host_lim(const char *text, const char *stop);
unsigned int inetaddr_host_lim_ret(const char *text, char *stop, const char **ret);

5
src/standard.c
View File

@ -535,6 +535,11 @@ unsigned int strl2uic(const char *s, int len)
return __strl2uic(s, len);
}
unsigned int read_uint(const char **s, const char *end)
{
return __read_uint(s, end);
}
/* This one is 7 times faster than strtol() on athlon with checks.
* It returns the value of the number composed of all valid digits read,
* and can process negative numbers too.