osd-contiki/apps/rest-common/rest-util.c

73 lines
1.8 KiB
C

/*
* rest-util.c
*
* Created on: Oct 26, 2010
* Author: dogan
*/
#include <stddef.h> /*for size_t*/
#include <ctype.h> /*for isxdigit*/
#include <string.h>
/*Copied from mangoose http server*/
size_t
decode(const char *src, size_t srclen, char *dst, size_t dstlen, int is_form)
{
size_t i, j;
int a, b;
#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
for (i = j = 0; i < srclen && j < dstlen - 1; i++, j++) {
if (src[i] == '%' &&
isxdigit(* (unsigned char *) (src + i + 1)) &&
isxdigit(* (unsigned char *) (src + i + 2))) {
a = tolower(* (unsigned char *) (src + i + 1));
b = tolower(* (unsigned char *) (src + i + 2));
dst[j] = ((HEXTOI(a) << 4) | HEXTOI(b)) & 0xff;
i += 2;
} else if (is_form && src[i] == '+') {
dst[j] = ' ';
} else {
dst[j] = src[i];
}
}
dst[j] = '\0'; /* Null-terminate the destination */
return ( i == srclen );
}
/*Copied from mangoose http server*/
int
get_variable(const char *name, const char *buffer, size_t buflen, char* output, size_t output_len, int decode_type)
{
const char *start = NULL, *end = NULL, *end_of_value;
size_t var_len = 0;
/*initialize the output buffer first*/
*output = 0;
var_len = strlen(name);
end = buffer + buflen;
for (start = buffer; start + var_len < end; start++)
{
if ((start == buffer || start[-1] == '&') && start[var_len] == '=' &&
! strncmp(name, start, var_len))
{
/* Point p to variable value */
start += var_len + 1;
/* Point s to the end of the value */
end_of_value = (const char *) memchr(start, '&', end - start);
if (end_of_value == NULL)
{
end_of_value = end;
}
return decode(start, end_of_value - start, output, output_len, decode_type);
}
}
return 0;
}