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parse_hex4: make input pointer const

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This commit is contained in:
Max Bruckner 2017-02-16 20:26:40 +01:00
parent ead389aba2
commit 0f271dcf63
1 changed files with 7 additions and 8 deletions
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15
cJSON.c
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@ -368,7 +368,7 @@ static unsigned char *print_number(const cJSON *item, printbuffer *p)
} }
/* parse 4 digit hexadecimal number */ /* parse 4 digit hexadecimal number */
static unsigned parse_hex4(const unsigned char *str) static unsigned parse_hex4(const unsigned char * const input)
{ {
unsigned int h = 0; unsigned int h = 0;
size_t i = 0; size_t i = 0;
@ -376,17 +376,17 @@ static unsigned parse_hex4(const unsigned char *str)
for (i = 0; i < 4; i++) for (i = 0; i < 4; i++)
{ {
/* parse digit */ /* parse digit */
if ((*str >= '0') && (*str <= '9')) if ((input[i] >= '0') && (input[i] <= '9'))
{ {
h += (unsigned int) (*str) - '0'; h += (unsigned int) input[i] - '0';
} }
else if ((*str >= 'A') && (*str <= 'F')) else if ((input[i] >= 'A') && (input[i] <= 'F'))
{ {
h += (unsigned int) 10 + (*str) - 'A'; h += (unsigned int) 10 + input[i] - 'A';
} }
else if ((*str >= 'a') && (*str <= 'f')) else if ((input[i] >= 'a') && (input[i] <= 'f'))
{ {
h += (unsigned int) 10 + (*str) - 'a'; h += (unsigned int) 10 + input[i] - 'a';
} }
else /* invalid */ else /* invalid */
{ {
@ -397,7 +397,6 @@ static unsigned parse_hex4(const unsigned char *str)
{ {
/* shift left to make place for the next nibble */ /* shift left to make place for the next nibble */
h = h << 4; h = h << 4;
str++;
} }
} }