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C phone-number: more comments

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Bruno Raoult
2021-09-05 12:29:12 +02:00
parent c6d39e8702
commit 0333652fdc
1 changed files with 6 additions and 1 deletions
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7
c/phone-number/phone_number.c
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@@ -17,7 +17,7 @@ static char *scan="%m[+(0-9]%*[()-. ]%m[0-9]%*[)-. ]%m[0-9]%*[-. ]%m[0-9]";
char *phone_number_clean(const char *input) char *phone_number_clean(const char *input)
{ {
char *sn[4] = { 0 }; char *sn[4];
uint64_t num[4]; uint64_t num[4];
uint64_t *p = &*num; uint64_t *p = &*num;
int nmatch; int nmatch;
@@ -37,6 +37,8 @@ char *phone_number_clean(const char *input)
switch (nmatch) { switch (nmatch) {
case 2: case 2:
/* maybe 2 could be valid, like 333 3334444 ?
*/
case 0: case 0:
return res; return res;
case 1: /* full number */ case 1: /* full number */
@@ -58,6 +60,9 @@ char *phone_number_clean(const char *input)
return res; return res;
break; break;
} }
/* we don't care if some num has random value here (initialized), snprintf
* will consume only what is needed to fill the number
*/
snprintf(res, LEN_NUM+1, "%ld%ld%ld", *p, *(p+1), *(p+2)); snprintf(res, LEN_NUM+1, "%ld%ld%ld", *p, *(p+1), *(p+2));
return res; return res;