mirror/cJSON
1
0
Fork 0
mirror of https://github.com/DaveGamble/cJSON.git synced 2023-08-10 21:13:26 +03:00
Code Issues Projects Releases Wiki Activity

reformatting: parse_hex4

Browse Source
This commit is contained in:
Max Bruckner 2016-09-27 23:47:58 +07:00
parent 67845e3dc6
commit e10f2bf08d
1 changed files with 82 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

89
cJSON.c
View File

@ -344,16 +344,89 @@ static char *print_number(cJSON *item, printbuffer *p)
return str;
}
/* parse 4 digit hexadecimal number */
static unsigned parse_hex4(const char *str)
{
unsigned h=0;
if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
h=h<<4;str++;
if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
h=h<<4;str++;
if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
h=h<<4;str++;
if (*str>='0' && *str<='9') h+=(*str)-'0'; else if (*str>='A' && *str<='F') h+=10+(*str)-'A'; else if (*str>='a' && *str<='f') h+=10+(*str)-'a'; else return 0;
unsigned h = 0;
/* first digit */
if ((*str >= '0') && (*str <= '9'))
{
h += (*str) - '0';
}
else if ((*str >= 'A') && (*str <= 'F'))
{
h += 10 + (*str) - 'A';
}
else if ((*str >= 'a') && (*str <= 'f'))
{
h += 10 + (*str) - 'a';
}
else /* invalid */
{
return 0;
}
/* second digit */
h = h << 4;
str++;
if ((*str >= '0') && (*str <= '9'))
{
h += (*str) - '0';
}
else if ((*str >= 'A') && (*str <= 'F'))
{
h += 10 + (*str) - 'A';
}
else if ((*str >= 'a') && (*str <= 'f'))
{
h += 10 + (*str) - 'a';
}
else /* invalid */
{
return 0;
}
/* third digit */
h = h << 4;
str++;
if ((*str >= '0') && (*str <= '9'))
{
h += (*str) - '0';
}
else if ((*str >= 'A') && (*str <= 'F'))
{
h += 10 + (*str) - 'A';
}
else if ((*str >= 'a') && (*str <= 'f'))
{
h += 10 + (*str) - 'a';
}
else /* invalid */
{
return 0;
}
/* fourth digit */
h = h << 4;
str++;
if ((*str >= '0') && (*str <= '9'))
{
h += (*str) - '0';
}
else if ((*str >= 'A') && (*str <= 'F'))
{
h += 10 + (*str) - 'A';
}
else if ((*str >= 'a') && (*str <= 'f'))
{
h += 10 + (*str) - 'a';
}
else /* invalid */
{
return 0;
}
return h;
}