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in BaseExpression: changed the way how field names are escaped:

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methods removed:
  virtual void before_field_name();
  virtual void after_field_name();
methods added:
  virtual void before_short_field_name();
  virtual void after_short_field_name();
  they are used for escaping column names in a case when using short form - just only column_name
  e.g.: [before_short_field_name]column_name[after_short_field_name]
methods added:
  virtual void before_first_part_long_field_name();
  virtual void after_first_part_long_field_name();
  virtual void before_second_part_long_field_name();
  virtual void after_second_part_long_field_name();
  they are used for escaping column names in a case when using long form: table_name.column_name
  e.g.: [before_first_part_long_field_name]table_name[after_first_part_long_field_name].[before_second_part_long_field_name]column_name[after_second_part_long_field_name]
methods added:
  virtual void esc(wchar_t val, PT::TextStream & stream);
This commit is contained in:
Tomasz Sowa
2021-02-24 01:15:17 +01:00
parent 0843e384eb
commit ff551a64b8
7 changed files with 209 additions and 47 deletions
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128
src/baseexpression.cpp
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@@ -5,7 +5,7 @@
*/
/*
* Copyright (c) 2018-2019, Tomasz Sowa
* Copyright (c) 2018-2021, Tomasz Sowa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -204,37 +204,75 @@ bool BaseExpression::is_long_table_name(const PT::TextStream & table_name)
}
bool BaseExpression::need_to_add_field_prefix(const wchar_t * field_name)
{
return !is_long_field_name(field_name);
}
void BaseExpression::put_field_name(const wchar_t * field_name, ModelEnv * model_env)
{
before_field_name();
if( use_prefix && model_env )
{
if( need_to_add_field_prefix(field_name) )
{
esc(model_env->table_name_short, *out_stream);
if( model_env->table_index > 1 )
{
(*out_stream) << model_env->table_index;
}
(*out_stream) << '.';
}
}
esc(field_name, *out_stream);
after_field_name();
if( is_long_field_name(field_name) )
put_long_field_name(field_name);
else
put_short_field_name(field_name, model_env);
}
const wchar_t * BaseExpression::put_long_part_field_name(const wchar_t * field_name)
{
while( *field_name != 0 && *field_name != '.' )
{
esc(*field_name, *out_stream);
field_name += 1;
}
return field_name;
}
void BaseExpression::put_long_field_name(const wchar_t * field_name)
{
before_first_part_long_field_name();
field_name = put_long_part_field_name(field_name);
after_first_part_long_field_name();
if( *field_name == '.' )
{
field_name += 1;
(*out_stream) << '.';
before_second_part_long_field_name();
field_name = put_long_part_field_name(field_name);
after_second_part_long_field_name();
}
}
void BaseExpression::put_short_field_name(const wchar_t * field_name, ModelEnv * model_env)
{
if( use_prefix && model_env )
{
before_first_part_long_field_name();
esc(model_env->table_name_short, *out_stream);
if( model_env->table_index > 1 )
{
(*out_stream) << model_env->table_index;
}
after_first_part_long_field_name();
(*out_stream) << '.';
before_second_part_long_field_name();
esc(field_name, *out_stream);
after_second_part_long_field_name();
}
else
{
before_short_field_name();
esc(field_name, *out_stream);
after_short_field_name();
}
}
void BaseExpression::save_foreign_key(const wchar_t * field_name, ModelEnv * model_env)
{
PT::TextStream str;
@@ -253,16 +291,37 @@ void BaseExpression::save_foreign_key(const wchar_t * field_name, ModelEnv * mod
}
void BaseExpression::before_field_name()
void BaseExpression::before_short_field_name()
{
}
void BaseExpression::after_field_name()
void BaseExpression::after_short_field_name()
{
}
void BaseExpression::before_first_part_long_field_name()
{
}
void BaseExpression::after_first_part_long_field_name()
{
}
void BaseExpression::before_second_part_long_field_name()
{
}
void BaseExpression::after_second_part_long_field_name()
{
}
void BaseExpression::before_field_value(const std::wstring &)
{
}
@@ -330,6 +389,19 @@ void BaseExpression::esc(unsigned char val, PT::TextStream & stream)
}
void BaseExpression::esc(wchar_t val, PT::TextStream & stream)
{
char utf8_buf[10];
size_t utf8_len = PT::IntToUTF8((int)val, utf8_buf, sizeof(utf8_buf));
for(size_t a = 0 ; a < utf8_len ; ++a)
{
esc(utf8_buf[a], stream);
}
}
void BaseExpression::esc(const std::wstring & val, PT::TextStream & stream)
{
char utf8_buf[10];