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sql.c
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273 lines (261 loc) · 6.63 KB
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#include "error.h"
#include "memory.h"
#include <stdbool.h>
#include <stdlib.h>
#include <mysql/mysql.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
MYSQL * mysql = NULL;
void CloseSQL(void) {
if (mysql) mysql_close(mysql);
mysql = NULL;
}
void OpenSQL(const char * mysql_host, const char * mysql_user,
const char * mysql_passwd, const char * mysql_db, unsigned int mysql_port,
const char * mysql_unix_socket) {
if (mysql = mysql_init(NULL)) {
mysql_options(mysql,MYSQL_SET_CHARSET_DIR,"/usr/local/share/mysql/charsets");
mysql_options(mysql,MYSQL_SET_CHARSET_NAME,"koi8r");
if (mysql_real_connect(mysql,mysql_host,mysql_user,mysql_passwd,mysql_db,
mysql_port,mysql_unix_socket,CLIENT_FOUND_ROWS)) {
if (!atexit(CloseSQL)) return;
}
else
error("Failed to connect to database. Error: %s", mysql_error(mysql));
}
else errno = ENOMEM;
error("Cannot open SQL");
}
void Vasprintf(char **ret, const char *format, va_list *ap) {
va_list apc;
va_copy(apc,*ap);
if (-1 == vasprintf(ret,format,apc)) error("Cannot format string: %s",format);
va_end(apc);
const char * f = format;
while (f = strchr(f,'%')) {
++f;
switch (*f) {
default:
errno = EDOOFUS;
error("Unsupported format %c in %s",*f,format);
case 's':
(void) va_arg(*ap,char *);
case '%': break;
case 'd':
(void) va_arg(*ap,int);
break;
case 'u':
(void) va_arg(*ap,unsigned);
break;
case 'f':
(void) va_arg(*ap,double);
break;
}
++f;
}
}
void sqlerror(void) {
error("MySQL error: %s.",mysql_error(mysql));
}
void query(const char * q, va_list * ap) {
unsigned * error_code = 0;
if (!strncmp("%e",q,2)) {
error_code = va_arg(*ap,unsigned *);
q+=2;
*error_code = 0;
}
char * left = NULL;
while(1) {
char * qpos = strstr(q,"%q");
while (qpos) {
char * qprev = qpos;
size_t lp = 0;
while (qprev != q) {
qprev--;
if (*qprev == '%') lp++;
else break;
}
if (lp%2) qpos = strstr(qpos+2,"%q");
else break;
}
if (qpos) {
if (qpos != q) {
char * middle;
size_t FL = qpos - q + 1;
char * format = Malloc(FL);
memcpy(format,q,FL-1);
format[FL-1] = 0;
Vasprintf(&middle,format,ap);
if (!middle) error(0);
Free(format);
Astrcat(&left,middle);
}
q = qpos+2;
const char * qstr = va_arg(*ap,const char *);
if (qstr) {
size_t L = strlen(qstr);
char * eqstr = Malloc(1+2*L);
(void)mysql_real_escape_string(mysql,eqstr,qstr,L);
char * qeqstr;
(void)asprintf(&qeqstr,"'%s'",eqstr);
if (!qeqstr) error(0);
Free(eqstr);
Astrcat(&left,qeqstr);
}
else {
char * null_str = Strdup("NULL");
Astrcat(&left,null_str);
}
if (*q) continue;
}
else {
char * right;
Vasprintf(&right,q,ap);
Astrcat(&left,right);
}
break;
}
if (!left) {
errno = EDOOFUS;
error(0);
}
if (mysql_real_query(mysql,left,strlen(left))) {
if (error_code) *error_code = mysql_errno(mysql);
else error("MySQL error: %s.",mysql_error(mysql));
}
Free(left);
}
bool rSQL(const char * q, ...) {
va_list ap;
va_start(ap,q);
query(q,&ap);
MYSQL_RES * res = mysql_store_result(mysql);
if (!res) error("MySQL no result, error: %s",mysql_error(mysql));
bool res_flag = false;
unsigned num_fields = mysql_num_fields(res);
MYSQL_FIELD * fields = mysql_fetch_fields(res);
MYSQL_ROW row;
if (row = mysql_fetch_row(res)) {
res_flag = true;
for (unsigned i = 0; i< num_fields; ++i) {
switch (fields[i].type) {
default:
errno = EDOOFUS;
error("Unsupported field type");
case FIELD_TYPE_TINY:
case FIELD_TYPE_LONG:
{
int32_t* n = va_arg(ap,int32_t*);
*n = atoi(row[i]);
break;
}
case FIELD_TYPE_LONGLONG:
{
long long* n = va_arg(ap,long long*);
*n = strtoll(row[i],0,10);
break;
}
case FIELD_TYPE_BLOB:
case FIELD_TYPE_STRING:
case FIELD_TYPE_VAR_STRING:
{
char ** s = va_arg(ap,char**);
if (row[i]) {
*s = Malloc(strlen(row[i])+1);
strcpy(*s,row[i]);
}
else *s = 0;
}
}
}
}
mysql_free_result(res);
va_end(ap);
return res_flag;
}
void wSQL(const char * q, ...) {
va_list ap;
va_start(ap,q);
query(q,&ap);
va_end(ap);
}
bool aSQL(void) {
switch (mysql_affected_rows(mysql)) {
case -1: errno = EDOOFUS; error("Wrong affected query");
case 0: return false;
default: return true;
}
}
unsigned long lastidSQL(void) {
unsigned long res = mysql_insert_id(mysql);
if (!res) {
errno = EINVAL;
error("nothing inserted");
}
return res;
}
void * rfSQL(const char * q, ...) {
va_list ap;
va_start(ap,q);
query(q,&ap);
va_end(ap);
MYSQL_RES * res = mysql_store_result(mysql);
if (!res) error("MySQL no result, error: %s",mysql_error(mysql));
return res;
}
bool rnSQL(void * res, ...) {
if (res) {
bool res_flag = false;
va_list ap;
va_start(ap,res);
unsigned num_fields = mysql_num_fields(res);
MYSQL_FIELD * fields = mysql_fetch_fields(res);
MYSQL_ROW row;
if (row = mysql_fetch_row(res)) {
res_flag = true;
for (unsigned i = 0; i< num_fields; ++i) {
switch (fields[i].type) {
default:
errno = EDOOFUS;
error("Unsupported field type");
case FIELD_TYPE_TINY:
{
int8_t* n = va_arg(ap,int8_t*);
*n = row[i] ? atoi(row[i]) : 0;
break;
}
case FIELD_TYPE_INT24:
case FIELD_TYPE_LONG:
{
int32_t* n = va_arg(ap,int32_t*);
*n = row[i] ? atoi(row[i]) : 0;
break;
}
case FIELD_TYPE_LONGLONG:
{
long long* n = va_arg(ap,long long*);
*n = strtoll(row[i],0,10);
break;
}
case FIELD_TYPE_BLOB:
case FIELD_TYPE_STRING:
case FIELD_TYPE_VAR_STRING:
{
char ** s = va_arg(ap,char**);
if (row[i]) {
*s = Malloc(strlen(row[i])+1);
strcpy(*s,row[i]);
}
else *s = 0;
}
}
}
}
if (!res_flag) mysql_free_result(res);
va_end(ap);
return res_flag;
}
return false;
}