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/* cvm/sql-query.c - SQL query parsing and insertion framework.
* Copyright (C) 2010 Bruce Guenter <bruce@untroubled.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <bglibs/str.h>
#include "module.h"
#include "sql.h"
#define QUOTE '\''
#define BACKSLASH '\\'
static int str_catb_quoted(str* s, const char* ptr, unsigned long len)
{
if (!str_catc(s, QUOTE)) return 0;
for (; len > 0; ++ptr, --len) {
switch (*ptr) {
case 0: if (!str_cats(s, "\\0")) return 0; continue;
case QUOTE: if (!str_catc(s, QUOTE)) return 0; break;
case BACKSLASH: if (!str_catc(s, BACKSLASH)) return 0; break;
}
str_catc(s, *ptr);
}
return str_catc(s, QUOTE);
}
int sql_query_validate(const char* template)
{
while ((template = strchr(template, '$')) != 0) {
++template;
switch (*template) {
case '$':
++template;
break;
case '{':
++template;
if ((template = strchr(template, '}')) == 0) return 0;
++template;
default:
while (isalnum(*template) || *template == '_') ++template;
}
}
return 1;
}
int sql_query_build(const char* template, str* q)
{
static str name;
const char* ptr;
if (!str_truncate(q, 0)) return 0;
while ((ptr = strchr(template, '$')) != 0) {
if (!str_catb(q, template, ptr - template)) return 0;
template = ptr + 1;
switch (*template) {
case '$':
++template;
if (!str_truncate(&name, 0)) return 0;
break;
case '{':
++template;
if ((ptr = strchr(template, '}')) == 0) return 0;
if (!str_copyb(&name, template, ptr-template)) return 0;
template = ptr + 1;
break;
default:
if (!str_truncate(&name, 0)) return 0;
while (isalnum(*template) || *template == '_')
if (!str_catc(&name, *template++)) return 0;
}
if (name.len == 0) {
if (!str_catc(q, '$')) return 0;
}
else {
if (str_diffs(&name, "account") == 0) {
if (!str_catb_quoted(q,
cvm_module_credentials[CVM_CRED_ACCOUNT].s,
cvm_module_credentials[CVM_CRED_ACCOUNT].len))
return 0;
}
else if (str_diffs(&name, "domain") == 0) {
if (!str_catb_quoted(q,
cvm_module_credentials[CVM_CRED_DOMAIN].s,
cvm_module_credentials[CVM_CRED_DOMAIN].len))
return 0;
}
else {
ptr = getenv(name.s);
if (ptr != 0)
if (!str_catb_quoted(q, ptr, strlen(ptr)))
return 0;
}
}
}
if (!str_cats(q, template)) return 0;
return 1;
}
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