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qre2.cpp
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qre2.cpp
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/* =============================================================================
qre2.cpp
================================================================================
Copyright (C) 2018 - 2020 Pablo Edronkin (pablo.edronkin at yahoo.com)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
============================================================================= */
#include "qre2.hpp"
#include "./lib/qlib/core/qlib.h"
using namespace qlib::quantum;
using namespace std;
/* write_callback - Required to read data received using curl.
Sources:
- Stack Overflow. (2019). How to use libcurl in c++ to send a POST request and
receive it?. [online] Available at: https://stackoverflow.com/questions/
51317221/how-to-use-libcurl-in-c-to-send-a-post-request-and-receive-it
[Accessed 21 Dec. 2019].
*/
static size_t write_callback(void *p_contents,
size_t p_size,
size_t p_nmemb,
void *p_userp)
{
((std::string*)p_userp)->append((char*)p_contents, p_size * p_nmemb);
return (p_size * p_nmemb);
}
/* show_res_parc - Shows partial results.
Arguments:
- p_base_verbosity: base verbosity.
- p_j: j.
- p_st: sterm.
- p_sk: sket.
- p_sv: svec.
*/
void show_res_parc(std::string p_base_verbosity,
int p_j,
std::string p_st,
std::string p_sk,
std::string p_sv)
{
qre_show_v(p_base_verbosity, ("res_parc[" + (qre_d2s((double)p_j)) + "].sterm = " + p_st + " .sket = " + p_sk + " .svec = " + p_sv + "\n"));
}
/* construct_res_step1 - Builds a standard header for json results.
Arguments:
- p_res: res.
- p_base_device: base device.
- p_base_name: base name.
*/
std::string construct_res_step1(std::string p_res,
std::string p_base_device,
std::string p_base_name)
{
return (p_res + "\'idCode\': " + qre_txt(43) + p_base_device + qre_txt(44) + ",\'idExecution\': " + qre_txt(43) + p_base_name + qre_txt(44) + ",\'result\': {\'measure\': {u\'labels\': [");
}
/* construct_res_step3 - Builds standard parts of json results string.
Arguments:
- p_step: step.
- p_res: res.
*/
std::string construct_res_step3(int p_step,
std::string p_res)
{
std::string res = p_res;
if (p_step == 3)
{
res = res + "]}},\'status\':\'DONE\'}";
}
else if (p_step == 1)
{
res = res + "u\'qubits\':[";
}
else if (p_step == 2)
{
res = res + "u\'values\':[";
}
else if (p_step == 4)
{
res = res + qre_txt(43);
}
else if (p_step == 5)
{
res = res + qre_txt(44);
}
else if (p_step == 6)
{
res = res + ",";
}
else if (p_step == 7)
{
res = res + "],";
}
else if (p_step == 8)
{
res = res + ", ";
}
return res;
}
/* ibmqx_qpost - Performs a post on q-series quantum computers. This function
is adapted from an example shown on the links listed as sources.
Arguments:
- p_base_verbosity: base verbosity as set on qre0.cpp.
- p_base_method: request method (post, get or delete).
- p_base_date: base_data.
- p_base_token: base token.
- p_post_content_type: post-content-type.
- p_base_results_storage: base-results-storage.
- p_post_uri: post-uri.
- p_login_id: login_id.
Note:
- Arguments correspond to the standard parameters contained in a .qreg file.
Sources:
- Curl.haxx.se. (2019). libcurl example - simplepost.c. [online] Available at:
https://curl.haxx.se/libcurl/c/simplepost.html [Accessed 21 Dec. 2019].
- IBM Developer. (2019). Archived | Quantum computing in action: IBM's Q
experience and the quantum shell game. [online] Available at:
https://developer.ibm.com/tutorials/os-quantum-computing-shell-game/
[Accessed 21 Dec. 2019].
- Stenberg, D. (2019). HTTP Post Header Fields with libcurl. [online]
Stack Overflow. Available at: https://stackoverflow.com/questions/22457601/
http-post-header-fields-with-libcurl [Accessed 21 Dec. 2019].
- Bondy, B. (2019). Why "Content-Length: 0" in POST requests?. [online] Stack
Overflow. Available at: https://stackoverflow.com/questions/328281/
why-content-length-0-in-post-requests [Accessed 21 Dec. 2019].
- GitHub. (2019). quantumjim/qreative. [online] Available at:
https://github.com/quantumjim/qreative/blob/master/tutorials/qrng_with_http.ipynb
[Accessed 21 Dec. 2019].
Output:
- Updated value for request log.
*/
std::string ibmqx_qpost(std::string p_base_verbosity,
std::string p_base_method,
std::string p_base_data,
std::string p_content_type,
std::string p_base_results_storage,
std::string p_uri,
std::string p_login_id)
{
CURL *curl;
CURLcode res1 = CURLE_OK;
std::string res = " ";
std::string read_buffer;
std::string file_cookies = "data/cookies/qre_cookies.txt";
std::string pdata = p_base_data;
std::string pcontenttype = p_content_type;
std::string puri = p_uri;
std::string ploginid = p_login_id;
std::string pcontenttype2 = "x-access-token: " + p_login_id + ";charset=utf-8";
std::string pcontentlength = "content-length: " + to_string(pdata.length());
std::string pclientapp = "x-qx-client-application: qiskit-api-py";
const char *cfile_cookies = file_cookies.c_str();
const char *data = pdata.c_str();
const char *contenttype = pcontenttype.c_str();
const char *contenttype2 = pcontenttype2.c_str();
const char *uri = puri.c_str();
const char *contentlength = pcontentlength.c_str();
const char *loginid = ploginid.c_str();
const char *clientapp = pclientapp.c_str();
char ccfile_cookies[file_cookies.length()];
char cdata[pdata.length()];
char ccontenttype[pcontenttype.length()];
char ccontenttype2[pcontenttype2.length()];
char curi[puri.length()];
char ccontentlength[pcontentlength.length()];
char ccloginid[ploginid.length()];
char cclientapp[pclientapp.length()];
strcpy(ccfile_cookies, cfile_cookies);
strcpy(cdata, data);
strcpy(ccontenttype, contenttype);
strcpy(ccontenttype2, contenttype2);
strcpy(curi, uri);
strcpy(ccontentlength, contentlength);
strcpy(ccloginid, loginid);
strcpy(cclientapp, clientapp);
/* Defining headers. */
struct curl_slist *headerlist=NULL;
headerlist = curl_slist_append(headerlist, ccontenttype);
headerlist = curl_slist_append(headerlist, "Transfer-Encoding: chunked");
/* Final check of data. */
if (qre_vb(p_base_verbosity))
{
qre_show_string("Data as is just before making the request:");
qre_show_var("Method: ", p_base_method);
qre_show_var("Data: ", cdata);
qre_show_var("Uri: ", curi);
qre_show_var("Content length: ", ccontentlength);
qre_show_var("Headers (init): ", ccontenttype);
qre_show_var("Login id: ", ccloginid);
qre_show_var("Client application: ", cclientapp);
}
res1 = curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
if (curl)
{
curl_easy_setopt(curl, CURLOPT_URL, curi);
curl_easy_setopt(curl, CURLOPT_COOKIEFILE, ccfile_cookies);
curl_easy_setopt(curl, CURLOPT_COOKIEJAR, ccfile_cookies);
curl_easy_setopt(curl, CURLOPT_HEADER, true);
/* Depending of request. */
if (p_base_method == qre_txt(49))
{
if (p_login_id == qre_txt(28))
{
curl_easy_setopt(curl, CURLOPT_FRESH_CONNECT, 1L);
}
if (p_login_id != qre_txt(28))
{
curl_easy_setopt(curl, CURLOPT_FORBID_REUSE, 1L);
headerlist = curl_slist_append(headerlist, ccontenttype2);
headerlist = curl_slist_append(headerlist, ccontentlength);
headerlist = curl_slist_append(headerlist, cclientapp);
headerlist = curl_slist_append(headerlist, "Accept: application/json");
}
curl_easy_setopt(curl,CURLOPT_POST, 1L);
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "POST");
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, cdata);
/* if we don't provide POSTFIELDSIZE, libcurl will strlen() itself */
// curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long)strlen(data));
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE_LARGE, (long)strlen(data));
}
else if (p_base_method == qre_txt(50))
{
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "GET");
}
else if (p_base_method == qre_txt(51))
{
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "DELETE");
}
/* Send the list with all headers. */
curl_easy_setopt(curl, CURLOPT_HEADER, headerlist);
/* Required to receive string data. */
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &read_buffer);
/* If verbosity value is yes, some more of info concerning the connection
will be shown.
*/
if (qre_vb(p_base_verbosity))
{
curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
}
else
{
curl_easy_setopt(curl, CURLOPT_VERBOSE, false);
}
/* Perform the request, res will get the return code */
res1 = curl_easy_perform(curl);
/* Check for errors */
if (res1 != CURLE_OK)
{
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res1));
}
else
{
res = read_buffer;
}
qre_show_v(p_base_verbosity, ("\nCurl status message: "));
}
curl_slist_free_all(headerlist);
curl_easy_cleanup(curl);
curl_global_cleanup();
return res;
}
/* ibmqx_login - Attempts to log in into the IBM QX server.
Arguments:
- p_base_verbosity.
- p_base_method.
- p_login_data.
- p_post_content_type.
- p_base_results_storage.
- p_login_uri.
- p_login_name: login_name.
Output:
- login_id as res.
*/
std::vector<std::string> ibmqx_login(std::string p_base_verbosity,
std::string p_base_method,
std::string p_login_data,
std::string p_post_content_type,
std::string p_base_results_storage,
std::string p_login_uri,
std::string p_login_name)
{
std::vector<std::string> res;
std::string res00 = qre_txt(28);
std::string res0 = "";
std::string res1 = "";
std::string res2 = "";
std::string res3 = "";
qre_show_string(qre_txt(3));
res00 = ibmqx_qpost(p_base_verbosity,
p_base_method,
p_login_data,
p_post_content_type,
p_base_results_storage,
p_login_uri,
qre_txt(28));
qre_show_string("\nLogin result\n\n");
qre_show_string(res00);
qre_store_results(p_base_verbosity,
p_base_results_storage,
p_login_name,
res00);
/* Parse the userId value from the received json data. */
res0 = qre_seek_in_json(res00, "\"id\"");
res.push_back(res0);
// res1 = qre_seek_in_json(res00, "\"ttl\"");
// res.push_back(res1);
//res.push_back("na");
res.push_back(qre_txt(28));
res2 = qre_seek_in_json(res00, "\"created\"");
res.push_back(res2);
res3 = qre_seek_in_json(res00, "\"userId\"");
if (res3 == "")
{
res.push_back(qre_txt(28));
}
else
{
res.push_back(res3);
}
if (qre_vb(p_base_verbosity))
{
qre_show_var("id", res[0]);
qre_show_var("ttl", res[1]);
qre_show_var("created", res[2]);
qre_show_var("userId", res[3]);
}
return res;
}
/* ibmqx_post_experiment - Posts an experiment.
Arguments:
- p_base_verbosity: base_verbosity.
- p_base_method: base_method.
- p_post_data: post data.
- p_post_content_type: post_content_type.
- p_post_results_storage: post_results_storage.
- p_post_uri: post_uri.
- p_post_name: post_name.
- p_login_id: login_id.
- p_base_name: nase_name.
- p_base_data: base_data.
- p_base_shots: base_shots.
- p_base_seed: base_seed.
- p_base_device: base_device.
Output:
- Result of the operation.
*/
std::string ibmqx_post_experiment(std::string p_base_verbosity,
std::string p_base_method,
std::string p_post_data,
std::string p_post_content_type,
std::string p_base_results_storage,
std::string p_post_uri,
std::string p_post_name,
std::string p_login_id,
std::string p_base_name,
std::string p_base_data,
std::string p_base_shots,
std::string p_base_seed,
std::string p_base_device)
{
std::string res = "";
std::string post_data = "";
std::string post_uri = p_post_uri;
std::string header2 = "";
std::string post_content_type = "";
std::string base_shots = qre_d2s((double)qre_enable_shots(true, p_base_shots));
post_data = "qasm="+p_base_data+"&codeType="+"QASM2"+"&name="+p_base_name;
post_uri = post_uri+"?access_token="+p_login_id+"&shots="+base_shots+"&seed="+p_base_seed+"&deviceRunType="+p_base_device;
if (qre_vb(p_base_verbosity))
{
qre_show_string("\n\nData to be posted: ");
qre_show_var("post_data", post_data);
qre_show_var("post_content_type", p_post_content_type);
qre_show_var("base_results_storage", p_base_results_storage);
qre_show_var("post_uri", post_uri);
qre_show_string("\n\n");
}
qre_show_v(p_base_verbosity, qre_txt(0));
res = ibmqx_qpost(p_base_verbosity,
p_base_method,
post_data,
p_post_content_type,
p_base_results_storage,
post_uri,
p_login_id);
// Bug here when calling ibmqx using Scheme.
qre_store_results(p_base_verbosity,
p_base_results_storage,
p_post_name,
res);
return res;
}
/* ibmqx_delete_experiment - Deletes an experiment.
Arguments:
- p_base_verbosity: base_verbosity.
- p_base_method: base_method.
- p_delete_data: delete data.
- p_delete_content_type: delete_content_type.
- p_base_results_storage: base_results_storage.
- p_delete_uri: delete_uri.
- p_delete_name: delete_name.
- p_login_id: login_id.
- p_base_name: nase_name.
Output:
- Result of the operation.
Sources:
- GitHub. (2019). nanowebcoder/NanoQuantumShellGame. [online] Available at:
https://github.com/nanowebcoder/NanoQuantumShellGame/blob/master/
NanoQuantum.Core/QProcessor.cs [Accessed 21 Dec. 2019].
*/
std::string ibmqx_delete_experiment(std::string p_base_verbosity,
std::string p_base_method,
std::string p_delete_data,
std::string p_delete_content_type,
std::string p_base_results_storage,
std::string p_delete_uri,
std::string p_delete_name,
std::string p_login_id,
std::string p_base_name)
{
std::string res = "";
std::string delete_uri = p_delete_uri;
delete_uri = delete_uri + "/users/"+p_login_id+"/codes/"+p_base_name;
if (qre_vb(p_base_verbosity))
{
qre_show_string("Deletion data: ");
qre_show_var("delete_data", p_delete_data);
qre_show_var("delete_content_type", p_delete_content_type);
qre_show_var("base_results_storage", p_base_results_storage);
qre_show_var("delete_uri", delete_uri);
qre_show_string("\n\n");
qre_show_string(qre_txt(1));
}
res = ibmqx_qpost(p_base_verbosity,
p_base_method,
p_delete_data,
p_delete_content_type,
p_base_results_storage,
p_delete_uri,
p_login_id);
qre_store_results(p_base_verbosity,
p_base_results_storage,
p_delete_name,
res);
return res;
}
/* qre_find_qasm_standards - Finds out if code is QASM-compatible.
Arguments:
- p_qasm_instructions: qasm_instructions vectorelement.
*/
void qre_find_qasm_standard(std::string p_base_verbosity,
std::string p_qasm_instructions)
{
if (qre_recog("2.", p_qasm_instructions) == true)
{
qre_show_v(p_base_verbosity, " Recognized as OPENQASM 2.*.");
}
else
{
qre_show_v(p_base_verbosity, " OPENQASM version declaration not found. Possibly incompatible code.");
}
}
/* qre_put_qubit_numbers - Put qubit numbers in a results string.
Arguments:
- p_nq: nq.
- p_res: res.
Output:
- Results string (res).
*/
std::string qre_put_qubit_numbers (int p_nq,
std::string p_res)
{
std::string res = p_res;
res = construct_res_step3(1, res);
for (int i = 0; i < p_nq; i++)
{
res = res + qre_d2s((double)i);
if (i < (p_nq - 1))
{
res = construct_res_step3(8, res);
}
}
return (construct_res_step3(7, res));
}
/* finish_res_and_save - Finish off the string and save.
Arguments:
- p_base_verbosity: base verbosity.
- p_base_results_storage: base results storage.
- p_base_bane: base name.
- p_res: res.
*/
std::string finish_res_and_save(std::string p_base_verbosity,
std::string p_base_results_storage,
std::string p_base_name,
std::string p_res)
{
std::string res = p_res;
res = construct_res_step3(3, res);
qre_store_results(p_base_verbosity, p_base_results_storage, p_base_name, res);
return res;
}
/* qlib_post_experiment - Perform experiment locally on a qlib-based simulator.
Arguments:
- p_base_verbosity: base_verbosity.
- p_base_data: base_data.
- p_base_seed: base_seed.
- p_base_shots: base_shots.
- p_base_name: base_name.
- p_base_device: local backend (qlib simulator, for now ;) ).
- "simulator": local simulator
*/
std::string qlib_post_experiment(std::string p_base_verbosity,
std::string p_base_data,
std::string p_base_results_storage,
std::string p_base_seed,
std::string p_base_shots,
std::string p_base_name,
std::string p_base_device)
{
int shots = 0;
int vector_size = 0;
int i = 0;
int j = 0;
int k = 0;
float svecx = 0;
float svecy = 0;
double sprob = 0;
std::string res = "";
std::string res2 = "";
std::string str = "";
std::string str1 = "";
std::string str2 = "";
std::string str3 = "";
std::string str4 = "";
std::string str5 = "";
std::string line = "";
std::string comment = qre_txt(26);
std::string space = " ";
std::string sq = "";
std::string delim = "";
std::string qr = "q";
std::string cr = "c";
long unsigned int rn = 0;
long unsigned int rm = 0;
long unsigned int ro = 0;
size_t pos = 0;
size_t pos1 = 0;
size_t terms = 0;
struct res_row
{
std::string sterm;
std::string sket;
std::string svec;
};
std::vector<res_row> res_parc;
std::vector<double> res_sum;
std::vector<double> res_shots;
std::vector<double> res_final;
std::vector<double>c;
//std::vector<double>r;
std::vector<std::string>qasm_instructions;
qre_show_v(p_base_verbosity, qre_txt(0));
qasm_instructions = qre_parse_data_string(p_base_verbosity, p_base_data);
vector_size = qasm_instructions.size();
shots = qre_enable_shots(false, p_base_shots);
/* We need to define qreg q and creg c before parsing anything else in the
QASM file.
*/
for (i = 0; i < vector_size; i++)
{
if (qre_recog("qreg", qasm_instructions[i]) == true)
{
rn = qre_parse_br(qasm_instructions[i], qr);
}
}
qreg q(rn);
qre_show_v(p_base_verbosity, qre_txt(11));
rn = 0;
for (i = 0; i < vector_size; i++)
{
if (qre_recog("creg", qasm_instructions[i]) == true)
{
rn = qre_parse_br(qasm_instructions[i], cr);
if (c.size() == 0)
{
for (j = 0; j < (int)rn; j++)
{
c.push_back(0.00);
//r.push_back(0.00);
}
}
}
}
qre_show_v(p_base_verbosity, qre_txt(12));
/* Shots iteration. */
for (k = 0; k < shots; k++)
{
/* File parsing iteration. */
for (i = 0; i < vector_size; i++)
{
/* Find if line will be ignored or not based on the value of delim. */
if ((qre_recog(comment, qasm_instructions[i]) == true)&&(qre_recog("// qdeclare qlib-simulator ", qasm_instructions[i]) == false))
{
qre_show_v(p_base_verbosity, (qre_txt(15) + qasm_instructions[i]));
}
/* Find if line will be ignored if it does not have spaces. */
else if (qre_recog(space, qasm_instructions[i]) == false)
{
qre_show_v(p_base_verbosity, (qre_txt(16) + qasm_instructions[i]));
}
else
{
qre_show_v(p_base_verbosity, (qre_txt(17) + qasm_instructions[i]));
/* Process quantum instructions. */
/* If instructions are atomic (no parenthesis found). */
if (qre_recog("(", qasm_instructions[i]) == false)
{
if (qre_recog("OPENQASM", qasm_instructions[i]) == true)
{
qre_find_qasm_standard(p_base_verbosity, qasm_instructions[i]);
}
if (qre_recog("include", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, " Library");
}
if (qre_recog("measure", qasm_instructions[i]) == true)
{
rn = qre_parse_br(qasm_instructions[i].substr(0), qr);
rm = qre_parse_br(qasm_instructions[i].substr(0), cr);
qre_show_v(p_base_verbosity, (qre_gaq("measure") + qre_l2s(rn) + qre_txt(18) + qre_l2s(rm)));
}
if (qre_recog("// qdeclare qlib-simulator ", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, qre_ina("qdeclare"));
}
if ((qre_recog("cx", qasm_instructions[i]) == true)&&(qre_recog("ccx", qasm_instructions[i]) == false))
{
pos = qasm_instructions[i].find(",");
rn = qre_parse_br(qasm_instructions[i].substr(0, pos-1), qr);
rm = qre_parse_br(qasm_instructions[i].substr(pos), qr);
q.apply(gates::CX, {rn,rm});
qre_show_v(p_base_verbosity, (qre_gaq("cx") + qre_l2s(rn) + qre_txt(21) + qre_l2s(rm)));
}
if (qre_recog("ccx", qasm_instructions[i]) == true)
{
pos = qasm_instructions[i].find(",");
rn = qre_parse_br(qasm_instructions[i].substr(0, pos-1), qr);
rm = qre_parse_br(qasm_instructions[i].substr(pos), qr);
str1 = qasm_instructions[i].substr(pos+1,(qasm_instructions[i].length()-1));
pos1 = str1.find(",");
ro = qre_parse_br(str1.substr(pos1), qr);
q.apply(gates::CCNOT, {rn,rm,ro});
qre_show_v(p_base_verbosity, (qre_gaq("ccx") + qre_l2s(rn) + qre_txt(23) + qre_l2s(rm) + qre_txt(21) + qre_l2s(ro)));
}
if (qre_recog("cy", qasm_instructions[i]) == true)
{
pos = qasm_instructions[i].find(",");
rn = qre_parse_br(qasm_instructions[i].substr(0, pos-1), qr);
rm = qre_parse_br(qasm_instructions[i].substr(pos), qr);
q.apply(gates::CY, {rn,rm});
qre_show_v(p_base_verbosity, (qre_gaq("cy") + qre_l2s(rn) + qre_txt(21) + qre_l2s(rm)));
}
if (qre_recog("cz", qasm_instructions[i]) == true)
{
pos = qasm_instructions[i].find(",");
rn = qre_parse_br(qasm_instructions[i].substr(0, pos-1), qr);
rm = qre_parse_br(qasm_instructions[i].substr(pos), qr);
q.apply(gates::CZ, {rn,rm});
qre_show_v(p_base_verbosity, (qre_gaq("cz") + qre_l2s(rn) + qre_txt(21) + qre_l2s(rm)));
}
if (qre_recog("ch", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, qre_ina("ch"));
}
if ((qre_recog("h ", qasm_instructions[i]) == true)&&(qre_recog("ch ", qasm_instructions[i]) == false))
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::H, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("h") + qre_l2s(rn)));
}
if ((qre_recog("x ", qasm_instructions[i]) == true)&&(qre_recog("cx ", qasm_instructions[i]) == false))
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::X, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("x") + qre_l2s(rn)));
}
if ((qre_recog("y ", qasm_instructions[i]) == true)&&(qre_recog("cy ", qasm_instructions[i]) == false))
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::Y, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("y")+ qre_l2s(rn)));
}
if ((qre_recog("z ", qasm_instructions[i]) == true)&&(qre_recog("cz ", qasm_instructions[i]) == false))
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::Z, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("z") + qre_l2s(rn)));
}
if (qre_recog("s ", qasm_instructions[i]) == true )
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::S, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("s") + qre_l2s(rn)));
}
if (qre_recog("sdg", qasm_instructions[i]) == true)
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::Sdg, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("sdg") + qre_l2s(rn)));
}
if ((qre_recog("t ", qasm_instructions[i]) == true)&&(qre_recog("reset ", qasm_instructions[i]) == false))
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::T, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("t") + qre_l2s(rn)));
}
if (qre_recog("tdg", qasm_instructions[i]) == true)
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::Tdg, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("tdg") + qre_l2s(rn)));
}
if (qre_recog("id ", qasm_instructions[i]) == true)
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::I, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("id") + qre_l2s(rn)));
}
if (qre_recog("barrier ", qasm_instructions[i]) == true )
{
rn = qre_parse_br(qasm_instructions[i], qr);
qre_show_v(p_base_verbosity, (qre_gaq("barrier") + qre_l2s(rn)));
}
if (qre_recog("reset ", qasm_instructions[i]) == true )
{
rn = qre_parse_br(qasm_instructions[i], qr);
q.apply(gates::reset, {rn});
qre_show_v(p_base_verbosity, (qre_gaq("reset") + qre_l2s(rn)));
}
if (qre_recog("swap ", qasm_instructions[i]) == true )
{
pos = qasm_instructions[i].find(",");
rn = qre_parse_br(qasm_instructions[i].substr(0, pos-1), qr);
rm = qre_parse_br(qasm_instructions[i].substr(pos), qr);
/* Implemented with three consecutive CNOT gates. */
q.apply(gates::CX, {rn,rm});
q.apply(gates::CX, {rm,rn});
q.apply(gates::CX, {rn,rm});
qre_show_v(p_base_verbosity, (qre_gaq("swap") + qre_l2s(rn) + qre_txt(21) + qre_l2s(rm)));
}
if (qre_recog("bloch", qasm_instructions[i]) == true )
{
qre_show_v(p_base_verbosity, qre_ina("bloch"));
}
}
/* Instructions that have parenthesis are composites and require
special treatment.
*/
if (qre_recog("(", qasm_instructions[i]) == true)
{
if ((qre_recog("u1", qasm_instructions[i]) == true)&&(qre_recog("cu1", qasm_instructions[i]) == false))
{
//rn = qre_parse_bitnum(qre_parse_reg(qasm_instructions[i], "q"));
//qre_show_v(p_base_verbosity, (" u1 gate at qubit " + qre_d2s((double)rn)));
//vector<std::string> phg = qre_parse_phase_gate(qasm_instructions[i], ",");
//q.apply(gates::phase(qre_s2d(phg[0])), {rn});
qre_show_v(p_base_verbosity, qre_ina("u1"));
}
if (qre_recog("u2", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, qre_ina("u2"));
}
if ((qre_recog("u3", qasm_instructions[i]) == true)&&(qre_recog("cu3", qasm_instructions[i]) == false))
{
qre_show_v(p_base_verbosity, qre_ina("u3"));
}
if (qre_recog("if", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, qre_ina("if"));
}
if (qre_recog("rx", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, qre_ina("rx"));
}
if (qre_recog("ry", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, qre_ina("ry"));
}
if ((qre_recog("rz", qasm_instructions[i]) == true)&&(qre_recog("crz", qasm_instructions[i]) == false))
{
qre_show_v(p_base_verbosity, qre_ina("rz"));
}
if (qre_recog("crz", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, qre_ina("crz"));
}
if (qre_recog("cu1", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, qre_ina("cu1"));
}
if (qre_recog("cu3", qasm_instructions[i]) == true)
{
qre_show_v(p_base_verbosity, qre_ina("cu3"));
}
}
}
}
/* On first shot, create data set for results. */
qre_show_v(p_base_verbosity, "\n");
if (k == 0)
{
delim = "> + ";
/* Count number of terms on linear combination. */
res2 = q.toString();
qre_show_v(p_base_verbosity, res2);
terms = 1;
while ((pos = res2.find(delim)) != std::string::npos)
{
terms++;
res2.erase(0, pos + delim.length());
}
terms++;
/*
This gives us a string matrix and two vectors:
- res_parc contains strings parsed from res2.
- res_sum contains the sum of all values corresponding to each ket.
- res_final contains the avg probabilities obtained from res_sum
and shots.
Each element of these vectors and matrices will be updated on each
shot.
*/
for (i = 0; i < (int)terms; i++)
{
res_parc.push_back({"","",""});
res_sum.push_back(0);
res_shots.push_back(0);
res_final.push_back(0);
}
}
/* On each iteration, after res_parc has been created, parse res2 and
distribute the parser data within the struct of each row.
*/
j = 0;
pos = 0;
res2 = q.toString();
delim = ">";
qre_show_v(p_base_verbosity, "\n");
while ((pos = res2.find(delim)) != std::string::npos)
{
res_parc[j].sterm = res2.substr(0, pos);
str1 = res_parc[j].sterm;
res_parc[j].sket = str1.substr((str1.find("|"))+1);
res_parc[j].svec = str1.substr(0,(str1.find("|"))-1);
str1 = res_parc[j].svec;
res_parc[j].svec = str1.substr((str1.find("("))+1);
res2.erase(0, pos + delim.length());
// Cast numbers as two floats.
str3 = res_parc[j].svec;
str4 = str3.substr(0,str3.find(" + "));
str5 = str3.substr(str3.find(" + ")+3);
str5 = str5.substr(0,str5.find("i"));
svecx = atof(str4.c_str());
svecy = atof(str5.c_str());
/* Square both and sum to get p = x^2 + y^2, increment value of
res_sum and show info.
*/
res_sum[j] = (double)(pow(svecx,2) + pow(svecy,2));
res_shots[j] = res_shots[j] + res_sum[j];
show_res_parc(p_base_verbosity,
j,
res_parc[j].sterm,
res_parc[j].sket,
res_parc[j].svec);
j++;
}
}