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-rw-r--r--src/mysqlerl.c704
1 files changed, 0 insertions, 704 deletions
diff --git a/src/mysqlerl.c b/src/mysqlerl.c
deleted file mode 100644
index 020d9eb..0000000
--- a/src/mysqlerl.c
+++ /dev/null
@@ -1,704 +0,0 @@
-/*
- * MySQL port driver.
- *
- * Copyright (C) 2008, Brian Cully <bjc@kublai.com>
- */
-
-#include "io.h"
-#include "log.h"
-#include "msg.h"
-
-#include <errno.h>
-#include <mysql.h>
-#include <string.h>
-
-const int TRUTHY = 1;
-const int FALSY = 0;
-
-const char *CONNECT_MSG = "sql_connect";
-const char *QUERY_MSG = "sql_query";
-const char *PARAM_QUERY_MSG = "sql_param_query";
-const char *SELECT_COUNT_MSG = "sql_select_count";
-const char *SELECT_MSG = "sql_select";
-const char *FIRST_MSG = "sql_first";
-const char *LAST_MSG = "sql_last";
-const char *NEXT_MSG = "sql_next";
-const char *PREV_MSG = "sql_prev";
-
-const char *NULL_SQL = "null";
-const char *NUMERIC_SQL = "sql_numeric";
-const char *DECIMAL_SQL = "sql_decimal";
-const char *FLOAT_SQL = "sql_float";
-const char *CHAR_SQL = "sql_char";
-const char *VARCHAR_SQL = "sql_varchar";
-const char *TIMESTAMP_SQL = "sql_timestamp";
-const char *INTEGER_SQL = "sql_integer";
-
-MYSQL dbh;
-MYSQL_RES *results = NULL;
-my_ulonglong resultoffset = 0, numrows = 0;
-
-void
-set_mysql_results()
-{
- if (results)
- mysql_free_result(results);
- results = mysql_store_result(&dbh);
-
- resultoffset = 0;
- numrows = results ? mysql_num_rows(results) : 0;
-}
-
-ETERM *
-make_cols(MYSQL_FIELD *fields, unsigned int num_fields)
-{
- ETERM **cols, *rc;
- unsigned int i;
-
- cols = (ETERM **)malloc(num_fields * sizeof(ETERM *));
- if (cols == NULL) {
- logmsg("ERROR: Couldn't allocate %d bytes for columns: %s",
- strerror(errno));
- exit(3);
- }
-
- for (i = 0; i < num_fields; i++)
- cols[i] = erl_mk_string(fields[i].name);
-
- rc = erl_mk_list(cols, num_fields);
-
- for (i = 0; i < num_fields; i++)
- erl_free_term(cols[i]);
- free(cols);
-
- return rc;
-}
-
-ETERM *
-make_row(MYSQL_ROW row, unsigned long *lengths, unsigned int num_fields)
-{
- ETERM **rowtup, *rc;
- unsigned int i;
-
- rowtup = (ETERM **)malloc(num_fields * sizeof(ETERM *));
- if (rowtup == NULL) {
- logmsg("ERROR: Couldn't allocate %d bytes for row: %s",
- strerror(errno));
- exit(3);
- }
-
- for (i = 0; i < num_fields; i++) {
- if (row[i])
- rowtup[i] = erl_mk_estring(row[i], lengths[i]);
- else
- rowtup[i] = erl_mk_atom("null");
- }
-
- rc = erl_mk_tuple(rowtup, num_fields);
- if (rc == NULL) {
- logmsg("ERROR: couldn't allocate %d-tuple", num_fields);
- exit(3);
- }
-
- for (i = 0; i < num_fields; i++)
- erl_free_term(rowtup[i]);
- free(rowtup);
-
- return rc;
-}
-
-ETERM *
-make_rows(unsigned int num_rows, unsigned int num_fields)
-{
- ETERM **rows, *rc;
- unsigned int i;
-
- rows = (ETERM **)malloc(num_rows * sizeof(ETERM *));
- if (rows == NULL) {
- logmsg("ERROR: Couldn't allocate %d bytes for rows: %s",
- strerror(errno));
- exit(3);
- }
-
- for (i = 0; i < num_rows; i++) {
- ETERM *rt;
- unsigned long *lengths;
- MYSQL_ROW row;
-
- row = mysql_fetch_row(results);
- resultoffset++;
- lengths = mysql_fetch_lengths(results);
-
- rt = make_row(row, lengths, num_fields);
- rows[i] = erl_format("~w", rt);
- erl_free_term(rt);
- }
-
- rc = erl_mk_list(rows, num_rows);
-
- for (i = 0; i < num_rows; i++)
- erl_free_term(rows[i]);
- free(rows);
-
- return rc;
-}
-
-ETERM *
-handle_mysql_result()
-{
- MYSQL_FIELD *fields;
- ETERM *ecols, *erows, *resp;
- unsigned int num_fields;
-
- num_fields = mysql_num_fields(results);
- fields = mysql_fetch_fields(results);
-
- ecols = make_cols(fields, num_fields);
- erows = make_rows(numrows, num_fields);
-
- resp = erl_format("{selected, ~w, ~w}", ecols, erows);
-
- erl_free_term(ecols);
- erl_free_term(erows);
-
- return resp;
-}
-
-void
-handle_connect(ETERM *msg)
-{
- ETERM *resp, *tmp;
- char *host, *db_name, *user, *passwd;
- int port;
-
- tmp = erl_element(2, msg);
- host = erl_iolist_to_string(tmp);
- erl_free_term(tmp);
-
- tmp = erl_element(3, msg);
- port = ERL_INT_VALUE(tmp);
- erl_free_term(tmp);
-
- tmp = erl_element(4, msg);
- db_name = erl_iolist_to_string(tmp);
- erl_free_term(tmp);
-
- tmp = erl_element(5, msg);
- user = erl_iolist_to_string(tmp);
- erl_free_term(tmp);
-
- tmp = erl_element(6, msg);
- passwd = erl_iolist_to_string(tmp);
- erl_free_term(tmp);
-
- /* TODO: handle options, passed in next. */
-
- logmsg("INFO: Connecting to %s on %s:%d as %s", db_name, host, port, user);
- if (mysql_real_connect(&dbh, host, user, passwd,
- db_name, port, NULL, 0) == NULL) {
- logmsg("ERROR: Failed to connect to database %s as %s: %s.",
- db_name, user, mysql_error(&dbh));
- exit(2);
- }
-
- resp = erl_format("ok");
- write_msg(resp);
- erl_free_term(resp);
-}
-
-void
-handle_query(ETERM *cmd)
-{
- ETERM *query, *resp;
- char *q;
-
- query = erl_element(2, cmd);
- q = erl_iolist_to_string(query);
- erl_free_term(query);
-
- logmsg("DEBUG: got query msg: %s.", q);
- if (mysql_query(&dbh, q)) {
- resp = erl_format("{error, {mysql_error, ~i, ~s}}",
- mysql_errno(&dbh), mysql_error(&dbh));
- } else {
- set_mysql_results();
- if (results) {
- resp = handle_mysql_result();
- set_mysql_results();
- } else {
- if (mysql_field_count(&dbh) == 0)
- resp = erl_format("{updated, ~i}", mysql_affected_rows(&dbh));
- else
- resp = erl_format("{error, {mysql_error, ~i, ~s}}",
- mysql_errno(&dbh), mysql_error(&dbh));
- }
- }
- erl_free(q);
-
- write_msg(resp);
- erl_free_term(resp);
-}
-
-/*
- * http://dev.mysql.com/doc/refman/5.1/en/mysql-stmt-execute.html
- *
- * 6 > odbc:param_query(Ref,
- * "INSERT INTO EMPLOYEE (NR, FIRSTNAME, "
- * "LASTNAME, GENDER) VALUES(?, ?, ?, ?)",
- * [{sql_integer,[2,3,4,5,6,7,8]},
- * {{sql_varchar, 20},
- * ["John", "Monica", "Ross", "Rachel",
- * "Piper", "Prue", "Louise"]},
- * {{sql_varchar, 20},
- * ["Doe","Geller","Geller", "Green",
- * "Halliwell", "Halliwell", "Lane"]},
- * {{sql_char, 1}, ["M","F","M","F","T","F","F"]}]).
- * {updated, 7}
- */
-void
-handle_param_query(ETERM *msg)
-{
- ETERM *query, *params, *p, *tmp, *resp;
- MYSQL_STMT *sth;
- MYSQL_BIND *bind;
- char *q;
- int param_count, i;
-
- query = erl_element(2, msg);
- q = erl_iolist_to_string(query);
- erl_free_term(query);
-
- params = erl_element(3, msg);
- erl_free_term(params);
-
- logmsg("DEBUG: got param query msg: %s.", q);
-
- sth = mysql_stmt_init(&dbh);
- if (mysql_stmt_prepare(sth, q, strlen(q))) {
- resp = erl_format("{error, {mysql_error, ~i, ~s}}",
- mysql_errno(&dbh), mysql_error(&dbh));
- } else {
- param_count = mysql_stmt_param_count(sth);
- if (param_count != erl_length(params)) {
- resp = erl_format("{error, {mysql_error, -1, [expected_params, %d, got_params, %d]}}", param_count, erl_length(params));
- } else {
- bind = malloc(param_count * sizeof(MYSQL_BIND));
- if (bind == NULL) {
- logmsg("ERROR: Couldn't allocate %d bytes for bind params.",
- param_count * sizeof(MYSQL_BIND));
- exit(3);
- }
- memset(bind, 0, param_count * sizeof(MYSQL_BIND));
-
- for (i = 0, tmp = params;
- (p = erl_hd(tmp)) != NULL && i < 1000;
- i++, tmp = erl_tl(tmp)) {
- ETERM *type, *value;
-
- type = erl_element(1, p);
- value = erl_element(2, p);
-
- if (ERL_IS_TUPLE(type)) {
- ETERM *t_type, *t_size;
- char *t;
-
- t_size = erl_element(2, type);
- bind[i].buffer_length = ERL_INT_VALUE(t_size);
- erl_free_term(t_size);
-
- t_type = erl_element(1, type);
- t = (char *)ERL_ATOM_PTR(t_type);
- bind[i].length = malloc(sizeof(unsigned long));
- if (strncmp(t, NUMERIC_SQL, strlen(NUMERIC_SQL)) == 0) {
- int val;
-
- bind[i].buffer_type = MYSQL_TYPE_LONG;
- *bind[i].length = bind[i].buffer_length * sizeof(int);
- bind[i].buffer = malloc(*bind[i].length);
- memset(bind[i].buffer, 0, *bind[i].length);
-
- val = ERL_INT_VALUE(value);
- memcpy(bind[i].buffer, &val, *bind[i].length);
- } else if (strncmp(t, DECIMAL_SQL, strlen(DECIMAL_SQL)) == 0) {
- char *val;
-
- bind[i].buffer_type = MYSQL_TYPE_STRING;
- *bind[i].length = bind[i].buffer_length * sizeof(char *);
- bind[i].buffer = malloc(*bind[i].length);
- memset(bind[i].buffer, 0, *bind[i].length);
-
- val = erl_iolist_to_string(value);
- if (val) {
- memcpy(bind[i].buffer, val, *bind[i].length);
- free(val);
- }
- } else if (strncmp(t, FLOAT_SQL, strlen(FLOAT_SQL)) == 0) {
- float val;
-
- bind[i].buffer_type = MYSQL_TYPE_FLOAT;
- *bind[i].length = bind[i].buffer_length * sizeof(float);
- bind[i].buffer = malloc(*bind[i].length);
- memset(bind[i].buffer, 0, *bind[i].length);
-
- val = ERL_FLOAT_VALUE(value);
- memcpy(bind[i].buffer, &val, *bind[i].length);
- } else if (strncmp(t, CHAR_SQL, strlen(CHAR_SQL)) == 0) {
- char *val;
-
- bind[i].buffer_type = MYSQL_TYPE_STRING;
- *bind[i].length = bind[i].buffer_length * sizeof(char *);
- bind[i].buffer = malloc(*bind[i].length);
- memset(bind[i].buffer, 0, *bind[i].length);
-
- val = erl_iolist_to_string(value);
- if (val) {
- memcpy(bind[i].buffer, val, *bind[i].length);
- free(val);
- }
- } else if (strncmp(t, VARCHAR_SQL, strlen(VARCHAR_SQL)) == 0) {
- char *val;
-
- bind[i].buffer_type = MYSQL_TYPE_BLOB;
- *bind[i].length = bind[i].buffer_length * sizeof(char *);
- bind[i].buffer = malloc(*bind[i].length);
- memset(bind[i].buffer, 0, *bind[i].length);
-
- val = erl_iolist_to_string(value);
- if (val) {
- memcpy(bind[i].buffer, val, *bind[i].length);
- free(val);
- }
- } else {
- logmsg("ERROR: Unknown sized type: {%s, %d}", t,
- bind[i].buffer_length);
- exit(3);
- }
- erl_free_term(t_type);
- } else {
- char *t;
-
- t = (char *)ERL_ATOM_PTR(type);
- if (strncmp(t, TIMESTAMP_SQL, strlen(TIMESTAMP_SQL)) == 0) {
- bind[i].buffer_type = MYSQL_TYPE_TIMESTAMP;
- *bind[i].length = sizeof(MYSQL_TIME);
- bind[i].buffer = malloc(*bind[i].length);
- memset(bind[i].buffer, 0, *bind[i].length);
-
- memcpy(bind[i].buffer, value, *bind[i].length);
- } else if (strncmp(t, INTEGER_SQL, strlen(INTEGER_SQL)) == 0) {
- int val;
-
- bind[i].buffer_type = MYSQL_TYPE_LONG;
- *bind[i].length = sizeof(int);
- bind[i].buffer = malloc(*bind[i].length);
- memset(bind[i].buffer, 0, *bind[i].length);
-
- val = ERL_INT_VALUE(value);
- memcpy(bind[i].buffer, &val, *bind[i].length);
- } else {
- logmsg("ERROR: Unknown type: %s", t);
- exit(3);
- }
- }
-
- bind[i].is_null = malloc(sizeof(int));
- if (ERL_IS_ATOM(value)
- && strncmp((char *)ERL_ATOM_PTR(value),
- NULL_SQL, strlen(NULL_SQL)) == 0)
- memcpy(bind[i].is_null, &TRUTHY, sizeof(int));
- else
- memcpy(bind[i].is_null, &FALSY, sizeof(int));
-
- erl_free_term(value);
- erl_free_term(type);
- }
- erl_free_term(params);
-
- if (mysql_stmt_bind_param(sth, bind)) {
- resp = erl_format("{error, {mysql_error, ~i, ~s}}",
- mysql_errno(&dbh), mysql_error(&dbh));
- } else {
- if (mysql_stmt_execute(sth)) {
- resp = erl_format("{error, {mysql_error, ~i, ~s}}",
- mysql_errno(&dbh), mysql_error(&dbh));
- } else {
- set_mysql_results();
- if (results) {
- resp = handle_mysql_result();
- set_mysql_results();
- } else {
- if (mysql_field_count(&dbh) == 0)
- resp = erl_format("{updated, ~i}", mysql_affected_rows(&dbh));
- else
- resp = erl_format("{error, {mysql_error, ~i, ~s}}",
- mysql_errno(&dbh), mysql_error(&dbh));
- }
- }
- }
-
- for (i = 0; i < param_count; i++) {
- free(bind[i].buffer);
- free(bind[i].is_null);
- }
- free(bind);
- }
- }
- erl_free(q);
-
- mysql_stmt_close(sth);
-
- write_msg(resp);
- erl_free_term(resp);
-}
-
-void
-handle_select_count(ETERM *msg)
-{
- ETERM *query, *resp;
- char *q;
-
- query = erl_element(2, msg);
- q = erl_iolist_to_string(query);
- erl_free_term(query);
-
- logmsg("DEBUG: got select count msg: %s.", q);
- if (mysql_query(&dbh, q)) {
- resp = erl_format("{error, {mysql_error, ~i, ~s}}",
- mysql_errno(&dbh), mysql_error(&dbh));
- } else {
- set_mysql_results();
- if (results) {
- resp = erl_format("{ok, ~i}", numrows);
- } else {
- if (mysql_field_count(&dbh) == 0)
- resp = erl_format("{ok, ~i}", mysql_affected_rows(&dbh));
- else
- resp = erl_format("{error, {mysql_error, ~i, ~s}}",
- mysql_errno(&dbh), mysql_error(&dbh));
- }
- }
- erl_free(q);
-
- write_msg(resp);
- erl_free_term(resp);
-}
-
-void
-handle_select(ETERM *msg)
-{
- MYSQL_FIELD *fields;
- ETERM *epos, *enum_items, *ecols, *erows, *resp;
- my_ulonglong pos, num_items;
- unsigned int num_fields;
-
- epos = erl_element(2, msg);
- enum_items = erl_element(3, msg);
- pos = ERL_INT_UVALUE(epos);
- num_items = ERL_INT_UVALUE(enum_items);
- erl_free_term(enum_items);
- erl_free_term(epos);
-
- logmsg("DEBUG: got select pos: %d, n: %d.", erl_size(msg), pos, num_items);
- if (results == NULL) {
- logmsg("ERROR: select message w/o cursor.");
- exit(2);
- }
-
- num_fields = mysql_num_fields(results);
- fields = mysql_fetch_fields(results);
- if (resultoffset > 0)
- resultoffset = pos - 1;
- if (num_items > numrows - resultoffset)
- num_items = numrows - resultoffset;
- mysql_data_seek(results, resultoffset);
-
- ecols = make_cols(fields, num_fields);
- erows = make_rows(num_items, num_fields);
- resp = erl_format("{selected, ~w, ~w}", ecols, erows);
- erl_free_term(erows);
-
- erl_free_term(ecols);
- write_msg(resp);
- erl_free_term(resp);
-}
-
-void
-handle_first(ETERM *msg)
-{
- MYSQL_FIELD *fields;
- ETERM *ecols, *erows, *resp;
- unsigned int num_fields;
-
- logmsg("DEBUG: got first msg.");
- if (results == NULL) {
- logmsg("ERROR: got first message w/o cursor.");
- exit(2);
- }
-
- num_fields = mysql_num_fields(results);
- fields = mysql_fetch_fields(results);
- resultoffset = 0;
- mysql_data_seek(results, resultoffset);
-
- ecols = make_cols(fields, num_fields);
- erows = make_rows(1, num_fields);
- resp = erl_format("{selected, ~w, ~w}", ecols, erows);
- erl_free_term(erows);
-
- erl_free_term(ecols);
- write_msg(resp);
- erl_free_term(resp);
-}
-
-void
-handle_last(ETERM *msg)
-{
- MYSQL_FIELD *fields;
- ETERM *ecols, *erows, *resp;
- unsigned int num_fields;
-
- logmsg("DEBUG: got last msg.");
- if (results == NULL) {
- logmsg("ERROR: got last message w/o cursor.");
- exit(2);
- }
-
- num_fields = mysql_num_fields(results);
- fields = mysql_fetch_fields(results);
- resultoffset = numrows - 1;
- mysql_data_seek(results, resultoffset);
-
- ecols = make_cols(fields, num_fields);
- erows = make_rows(1, num_fields);
- resp = erl_format("{selected, ~w, ~w}", ecols, erows);
- erl_free_term(erows);
-
- erl_free_term(ecols);
- write_msg(resp);
- erl_free_term(resp);
-}
-
-void
-handle_next(ETERM *msg)
-{
- MYSQL_FIELD *fields;
- ETERM *ecols, *erows, *resp;
- unsigned int num_fields;
-
- logmsg("DEBUG: got next msg.");
- if (results == NULL) {
- logmsg("ERROR: got next message w/o cursor.");
- exit(2);
- }
-
- num_fields = mysql_num_fields(results);
- fields = mysql_fetch_fields(results);
-
- ecols = make_cols(fields, num_fields);
- logmsg("resultoffset: %d, num_rows: %d", resultoffset, numrows);
- if (resultoffset == numrows) {
- resp = erl_format("{selected, ~w, []}", ecols);
- } else {
- erows = make_rows(1, num_fields);
- resp = erl_format("{selected, ~w, ~w}", ecols, erows);
- erl_free_term(erows);
- }
-
- erl_free_term(ecols);
- write_msg(resp);
- erl_free_term(resp);
-}
-
-void
-handle_prev(ETERM *msg)
-{
- MYSQL_FIELD *fields;
- ETERM *ecols, *erows, *resp;
- unsigned int num_fields;
-
- logmsg("DEBUG: got prev msg.");
- if (results == NULL) {
- logmsg("ERROR: got prev message w/o cursor.");
- exit(2);
- }
-
- num_fields = mysql_num_fields(results);
- fields = mysql_fetch_fields(results);
-
- ecols = make_cols(fields, num_fields);
- logmsg("resultoffset: %d, num_rows: %d", resultoffset, numrows);
- if (resultoffset == 0) {
- resp = erl_format("{selected, ~w, []}", ecols);
- } else {
- resultoffset = resultoffset - 1;
- mysql_data_seek(results, resultoffset);
- erows = make_rows(1, num_fields);
-
- /* Rewind to position at the point we returned. */
- resultoffset = resultoffset - 1;
- mysql_data_seek(results, resultoffset);
- resp = erl_format("{selected, ~w, ~w}", ecols, erows);
- erl_free_term(erows);
- }
-
- erl_free_term(ecols);
- write_msg(resp);
- erl_free_term(resp);
-}
-
-void
-dispatch_db_cmd(ETERM *msg)
-{
- ETERM *tag;
- char *tag_name;
-
- tag = erl_element(1, msg);
- tag_name = (char *)ERL_ATOM_PTR(tag);
- if (strncmp(tag_name, CONNECT_MSG, strlen(CONNECT_MSG)) == 0)
- handle_connect(msg);
- else if (strncmp(tag_name, QUERY_MSG, strlen(QUERY_MSG)) == 0)
- handle_query(msg);
- else if (strncmp(tag_name, PARAM_QUERY_MSG, strlen(PARAM_QUERY_MSG)) == 0)
- handle_param_query(msg);
- else if (strncmp(tag_name, SELECT_COUNT_MSG, strlen(SELECT_COUNT_MSG)) == 0)
- handle_select_count(msg);
- else if (strncmp(tag_name, SELECT_MSG, strlen(SELECT_MSG)) == 0)
- handle_select(msg);
- else if (strncmp(tag_name, FIRST_MSG, strlen(FIRST_MSG)) == 0)
- handle_first(msg);
- else if (strncmp(tag_name, LAST_MSG, strlen(LAST_MSG)) == 0)
- handle_last(msg);
- else if (strncmp(tag_name, NEXT_MSG, strlen(NEXT_MSG)) == 0)
- handle_next(msg);
- else if (strncmp(tag_name, PREV_MSG, strlen(PREV_MSG)) == 0)
- handle_prev(msg);
- else {
- logmsg("WARNING: message type %s unknown.", (char *)ERL_ATOM_PTR(tag));
- erl_free_term(tag);
- exit(3);
- }
-
- erl_free_term(tag);
-}
-
-int
-main(int argc, char *argv[])
-{
- ETERM *msg;
-
- openlog();
- logmsg("INFO: starting up.");
- erl_init(NULL, 0);
-
- mysql_init(&dbh);
- while ((msg = read_msg()) != NULL) {
- dispatch_db_cmd(msg);
- erl_free_term(msg);
- }
- mysql_close(&dbh);
-
- logmsg("INFO: shutting down.");
- closelog();
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 01:26:25 +0000