/**
* @brief A wrapper routine for get_next_token(). Reads next token from query
* using get_next_token() and further ensures that the token read is a
* valid one.
* @param query The query from where next token will be read.
* @param index The index in the passed query from where next token will be
* scanned.
* @return The token that we have just read.
*/
std::string get_next_valid_token(std::string *query, unsigned int* index) {
std::string current_token = get_next_token(query, index);
std::string tmp = "";
//check if this token is a valid one
while (!is_valid_token(current_token) and *index < query->length()) {
current_token = get_next_token(query, index);
}
//how did we get out ? was it because we got a valid token or because end
// of query reched ?
if (*index >= query->length() and !is_valid_token(current_token)) {
return "";
}
// remove tokens enclosed in backticks if any
if (current_token[0] == '`') {
sanitize_token(¤t_token);
}
// if token is CONCAT then eat out everything until a ')' is found
if (convert_to_uppercase(current_token) == "CONCAT") {
current_token = get_next_token(query, index);
while (current_token != ")" and *index < query->length()) {
current_token = get_next_token(query, index);
}
if (*index < query->length()) {
//this is bad as even though closing ')' have been encountered
// we still need a valid token
return "";
}
/*
* if we are here then current_token is ")" now read next_token
* so far we have only eaten CONCAT block. it's not for sure that next
* block is a valid one.
* is this recursive block correct ?
*/
current_token = get_next_valid_token(query, index);
} else if (convert_to_uppercase(current_token) == "MAX") {
/*
* MAx(coulmn_name) is a keyword that gives a column name in round
* brackets.
*/
tmp = get_next_token(query, index); //must be a (
if (tmp != "(") {
std::cerr << "No '(' after MAX at pos: " << *index << std::endl;
return "";
}
//now read the actual col name
current_token = get_next_token(query, index);
//bypass the closing ')'
tmp = get_next_token(query, index); //must be a (
if (tmp != ")") {
std::cerr << "No ')' after MAX at pos: " << *index << std::endl;
return "";
}
}
return current_token;
}
static int http_header_add(struct http_context *ctx, struct http_header* header)
{
int size;
struct http_header *p;
if(ctx->header_size+1 >= ctx->header_capacity)
{
size = ctx->header_capacity < 16 ? 16 : (ctx->header_size * 3 / 2);
p = (struct http_header*)realloc(ctx->headers, sizeof(struct http_header) * size);
if(!p)
return ENOMEM;
ctx->headers = p;
ctx->header_capacity = size;
}
assert(header->npos > 0);
assert(header->nlen > 0);
assert(header->vpos > 0);
assert(is_valid_token(ctx->raw+header->npos, header->nlen));
ctx->raw[header->npos+header->nlen] = '\0';
ctx->raw[header->vpos+header->vlen] = '\0';
memmove(ctx->headers + ctx->header_size, header, sizeof(struct http_header));
++ctx->header_size;
// handle
http_header_handler(ctx, header->npos, header->vpos);
return 0;
}
void parse_command_line ( int argc, char **argv, char **env )
{
char *p;
register int i;
query.num_nodes = 0;
for (i = 1 ; i < argc ; i++ ){
p = argv[i];
query.token_data[token_number].order = 1;
if ( isdigit( p[0] ) ){
if ( !token_number ){
fprintf(stderr, "\nERROR: you didn't specify any sort tokens\n\n");
exit(1);
}else{
query.num_nodes = atoi ( p );
break;
}
}
query.token_data[token_number].order = 1;
if ( p[0] == '+' ) p++;
else if ( p[0] == '-' ){
query.token_data[token_number].order = -1;
p++;
}
if ( is_valid_token( p ) )
strcpy( query.token_data[token_number].token , p);
else {
fprintf(stderr, "ERROR: %s is not a valid token\n", p);
fprintf(stderr, "\nType \"ganglia\" for command SYNTAX\n\n");
exit(1);
}
token_number++;
if ( token_number > NUM_TOKENS ){
fprintf(stderr, "ERROR: only %d tokens can be specified\n", NUM_TOKENS);
exit(1);
}
}
}
int
parse_bitcoin_block(unsigned char* json, size_t size, block_header* block)
{
unsigned short* res = calloc(size, sizeof(unsigned short));
if (res == NULL) {
return -1;
}
int ret = js0n(json, size, res, size);
enum block_tokens token = UNKNOWN;
uint32 value;
int i =0, processed = 0;
while (processed < 7 & res[i] != 0)
{
int s = res[i++];
int l = res[i++];
token = parse_token(json, s, l);
s = res[i++];
l = res[i++];
if (is_valid_token(token))
{
char* str = (char*)(json + s);
str[l] ='\0'; // LAMb
// printf("str=%s\n", str);
switch(token)
{
case HASH:
break;
case VERSION:
value = parse_int(str);
REVERSE_32(block->version, value);
break;
case PREV_BLOCK:
hex_to_bytes_rev(str, l, block->prev_block, 256);
break;
case MRKL_ROOT:
hex_to_bytes_rev(str, l, block->mrkl_root, 256);
break;
case SECS:
value = parse_int(str);
REVERSE_32(block->time, value);
break;
case BITS:
value = parse_int(str);
REVERSE_32(block->bits, value);
break;
case NONCE:
value = parse_int(str);
REVERSE_32(block->nonce, value);
break;
default:
break;
}
processed++;
}
}
free(res);
return 0;
}
// H4.2 Message Headers
// message-header = field-name ":" [ field-value ]
// field-name = token
// field-value = *( field-content | LWS )
// field-content = <the OCTETs making up the field-value
// and consisting of either *TEXT or combinations
// of token, separators, and quoted-string>
static int http_parse_header_line(struct http_context *ctx)
{
enum {
SM_HEADER_START = SM_HEADER,
SM_HEADER_NAME,
SM_HEADER_NAME_SP,
SM_HEADER_SEPARATOR,
SM_HEADER_VALUE
};
int r;
for(; ctx->offset < ctx->raw_size; ctx->offset++)
{
switch(ctx->stateM)
{
case SM_HEADER_START:
switch(ctx->raw[ctx->offset])
{
case '\r':
assert(0 == ctx->header.npos);
assert(0 == ctx->header.vpos);
if(ctx->offset + 2 > ctx->raw_size)
return 0; // wait more date
++ctx->offset;
assert('\n' == ctx->raw[ctx->offset]);
case '\n':
assert(0 == ctx->header.npos);
assert(0 == ctx->header.vpos);
++ctx->offset;
ctx->stateM = SM_BODY;
return 0;
case ' ':
case '\t':
assert(0); // multi-line header ?
break;
default:
assert(0 == ctx->header.npos);
assert(0 == ctx->header.nlen);
ctx->header.npos = ctx->offset;
ctx->stateM = SM_HEADER_NAME;
}
break;
case SM_HEADER_NAME:
switch(ctx->raw[ctx->offset])
{
case '\r':
case '\n':
assert(0);
return -1; // invalid
case ' ':
ctx->header.nlen = ctx->offset - ctx->header.npos;
assert(ctx->header.nlen > 0 && is_valid_token(ctx->raw+ctx->header.npos, ctx->header.nlen));
ctx->stateM = SM_HEADER_NAME_SP;
break;
case ':':
ctx->header.nlen = ctx->offset - ctx->header.npos;
assert(ctx->header.nlen > 0 && is_valid_token(ctx->raw+ctx->header.npos, ctx->header.nlen));
ctx->stateM = SM_HEADER_SEPARATOR;
break;
}
break;
case SM_HEADER_NAME_SP:
switch(ctx->raw[ctx->offset])
{
case ' ':
break; // skip SP
case ':':
ctx->stateM = SM_HEADER_SEPARATOR;
break;
default:
assert(0);
return -1;
}
break;
case SM_HEADER_SEPARATOR:
switch(ctx->raw[ctx->offset])
{
case '\r':
// empty value
// e.g. x-wap-profile: \r\nx-forwarded-for: 10.25.110.244, 115.168.35.85\r\n
++ctx->offset;
assert('\n' == ctx->raw[ctx->offset]);
case '\n':
ctx->header.vpos = ctx->offset;
ctx->header.vlen = 0;
r = http_header_add(ctx, &ctx->header);
if(0 != r)
return r;
memset(&ctx->header, 0, sizeof(struct http_header)); // reuse header
ctx->stateM = SM_HEADER;
break;
case ' ':
break; // skip SP
default:
ctx->stateM = SM_HEADER_VALUE;
ctx->header.vpos = ctx->offset;
break;
}
break;
case SM_HEADER_VALUE:
switch(ctx->raw[ctx->offset])
{
case '\n':
assert('\r' == ctx->raw[ctx->offset-1]);
ctx->header.vlen = ctx->offset - 1 - ctx->header.vpos;
trim_right(ctx->raw, &ctx->header.vpos, &ctx->header.vlen);
ctx->stateM = SM_HEADER;
// add new header
r = http_header_add(ctx, &ctx->header);
if(0 != r)
return r;
memset(&ctx->header, 0, sizeof(struct http_header)); // reuse header
break;
default:
break;
}
break;
default:
assert(0);
return -1;
}
}
return 0;
}