git.sesse.net Git - cubemap/blob - parse.cpp

   1 #include <ctype.h>
   2 #include <string.h>
   3 #include <string>
   4 #include <vector>
   5
   6 #include "parse.h"
   7
   8 using namespace std;
   9
  10 vector<string> split_tokens(const string &line)
  11 {
  12         vector<string> ret;
  13         string current_token;
  14
  15         for (size_t i = 0; i < line.size(); ++i) {
  16                 if (isspace(line[i])) {
  17                         if (!current_token.empty()) {
  18                                 ret.push_back(current_token);
  19                         }
  20                         current_token.clear();
  21                 } else {
  22                         current_token.push_back(line[i]);
  23                 }
  24         }
  25         if (!current_token.empty()) {
  26                 ret.push_back(current_token);
  27         }
  28         return ret;
  29 }
  30
  31 vector<string> split_lines(const string &str)
  32 {
  33         vector<string> ret;
  34         string current_line;
  35
  36         for (size_t i = 0; i < str.size(); ++i) {
  37                 // Skip \r if followed by an \n.
  38                 if (str[i] == '\r' && i < str.size() - 1 && str[i + 1] == '\n') {
  39                         continue;
  40                 }
  41
  42                 // End of the current line?
  43                 if (str[i] == '\n') {
  44                         if (!current_line.empty()) {
  45                                 ret.push_back(current_line);
  46                         }
  47                         current_line.clear();
  48                 } else {
  49                         current_line.push_back(str[i]);
  50                 }
  51         }
  52         if (!current_line.empty()) {
  53                 ret.push_back(current_line);
  54         }
  55         return ret;
  56 }
  57
  58 #define MAX_REQUEST_SIZE 16384  /* 16 kB. */
  59
  60 RequestParseStatus wait_for_double_newline(string *existing_data, const char *new_data, size_t new_data_size)
  61 {
  62         // Guard against overlong requests gobbling up all of our space.
  63         if (existing_data->size() + new_data_size > MAX_REQUEST_SIZE) {
  64                 return RP_OUT_OF_SPACE;
  65         }
  66
  67         // See if we have \r\n\r\n anywhere in the request. We start three bytes
  68         // before what we just appended, in case we just got the final character.
  69         size_t existing_data_bytes = existing_data->size();
  70         existing_data->append(string(new_data, new_data + new_data_size));
  71
  72         const size_t start_at = (existing_data_bytes >= 3 ? existing_data_bytes - 3 : 0);
  73         const char *ptr = reinterpret_cast<char *>(
  74                 memmem(existing_data->data() + start_at, existing_data->size() - start_at,
  75                        "\r\n\r\n", 4));
  76         if (ptr == NULL) {
  77                 return RP_NOT_FINISHED_YET;
  78         }
  79         if (ptr != existing_data->data() + existing_data->size() - 4) {
  80                 return RP_EXTRA_DATA;
  81         }
  82         return RP_FINISHED;
  83 }