scripts/traffic/utils.c

   1 #include "utils.h"
   2
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <assert.h>
   6
   7 void split_fields(char *line, ...)
   8 {
   9         va_list args;
  10
  11         va_start(args, line);
  12         char* c = line;
  13         for (char** field = va_arg(args, char**); field != NULL;
  14                             field = va_arg(args, char**)) {
  15                 *field = c;
  16
  17                 for (; *c != '\t' && *c != '\n'; c++) {
  18                         assert(*c != '\0');
  19                 }
  20
  21                 *c = '\0';
  22                 c += 1;
  23         }
  24         va_end(args);
  25 }
  26
  27 int url_decode(char* buffer)
  28 {
  29         char *c = buffer, *o = buffer;
  30         int size = 0;
  31
  32         for (;*c != '\0';) {
  33                 if (*c == '%') {
  34                         int count = sscanf(c + 1, "%2hhx", o);
  35                         if (count != 1) {
  36                                 size = -1;
  37                                 break;
  38                         }
  39
  40                         c += 3;
  41                 } else {
  42                         *o = *c;
  43                         c += 1;
  44                 }
  45
  46                 o += 1;
  47                 size += 1;
  48         }
  49
  50         if (size > 0)
  51                 *o = '\0';
  52
  53         return size;
  54 }
  55
  56 int parse_query_param(char** query, char** key, char** value)
  57 {
  58         if (*query == NULL) {
  59                 return -1;
  60         }
  61
  62         *key = *query;
  63         *value = NULL;
  64
  65         bool string_ended = false;
  66         int value_length = -1;
  67         char *c;
  68
  69         for(c = *query; *c != '&'; c++) {
  70                 if (*c == '\0') {
  71                         string_ended = true;
  72                         break;
  73                 } else if (*value == NULL && *c == '=') {
  74                         *c = '\0';
  75                         *value = c + 1;
  76                 }
  77
  78                 if (*value != NULL) {
  79                         value_length += 1;
  80                 }
  81         }
  82
  83         *c = '\0';
  84
  85         if (!string_ended) {
  86                 *query = c + 1;
  87         } else {
  88                 *query = NULL;
  89         }
  90
  91         return value_length;
  92 }
  93