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#include "globals.h"
#include <curl/curl.h>
void cleanup(void)
{
curl_global_cleanup();
}
struct data_buffer_t {
char *data;
uint back;
};
void all_upper(char *str)
{
while(*str)
{
*str = toupper(*str);
++str;
}
}
void all_lower(char *str)
{
while(*str)
{
*str = tolower(*str);
++str;
}
}
size_t download_callback(char *ptr, size_t size, size_t nmemb, void *userdata)
{
struct data_buffer_t *buf = userdata;
buf->data = realloc(buf->data, buf->back + size * nmemb);
memcpy(buf->data + buf->back, ptr, size * nmemb);
buf->back += size * nmemb;
return size * nmemb;
}
bool get_stock_info(char *symbol, struct money_t *price, char **name_ret)
{
CURL *curl = curl_easy_init();
if(!curl)
{
return false;
}
char url[256];
snprintf(url, sizeof(url), "http://download.finance.yahoo.com/d/quotes.csv?s=%s&f=nl1&e=.csv", symbol);
curl_easy_setopt(curl, CURLOPT_URL, url);
struct data_buffer_t buf;
memset(&buf, 0, sizeof(buf));
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, download_callback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buf);
CURLcode res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
/** now parse the data **/
/* the stock name is in quotes, find it! */
/* check for validity */
if(buf.back == 0 || buf.data[0] != '"' || res != CURLE_OK)
{
printf("Failed to retrieve stock data.\n");
if(res != CURLE_OK)
{
printf("Download library error (%d): '%s'\n", res, curl_easy_strerror(res));
}
return false;
}
uint name_len = 0;
for(uint i = 1; i < buf.back; ++i)
{
if(buf.data[i] == '"')
break;
++name_len;
}
const uint name_offs = 1;
uint price_offs = name_len + 3;
uint price_len = buf.back - price_offs;
char *name = malloc(name_len + 1);
memcpy(name, buf.data + name_offs, name_len);
name[name_len] = '\0';
*name_ret = name;
/* get price */
char *pricebuf = malloc(price_len + 1);
memcpy(pricebuf, buf.data + price_offs, price_len);
pricebuf[price_len] = '\0';
free(buf.data);
/* remove the decimal point */
for(int i = 0; i < price_len; ++i)
{
if(pricebuf[i] == '.')
memmove(pricebuf + i, pricebuf + i + 1, price_len - i);
}
price->cents = strtoull(pricebuf, NULL, 10);
free(pricebuf);
return true;
}
int compare_stocks(const void *a, const void *b)
{
const struct stock_t *a1 = a, *b1 = b;
return strcmp(a1->symbol,
b1->symbol);
}
static enum { OTHER = 0, LITTLE = 1, BIG = 2 } endianness;
static void detect_endianness(void)
{
ulong test = 0x12345678;
uchar *ptr = (uchar*)&test;
if(*ptr == 0x12)
endianness = BIG;
else if(*ptr == 0x78)
endianness = LITTLE;
else
{
printf("FATAL: failed to detect system endianness!\n");
exit(EXIT_FAILURE);
}
}
uint64_t to_be64(uint64_t n)
{
if(!endianness)
{
detect_endianness();
}
if(BIG)
{
n = (n & 0x00000000FFFFFFFF) << 32 | (n & 0xFFFFFFFF00000000) >> 32;
n = (n & 0x0000FFFF0000FFFF) << 16 | (n & 0xFFFF0000FFFF0000) >> 16;
n = (n & 0x00FF00FF00FF00FF) << 8 | (n & 0xFF00FF00FF00FF00) >> 8;
}
return n;
}
uint64_t to_sys64(uint64_t n)
{
if(!endianness)
{
detect_endianness();
}
if(endianness == BIG)
return n;
else
return to_be64(n);
}
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