free barcode generator in asp.net c# A TOUR OF THE MYSQL SOURCE CODE in Font

Drawing Quick Response Code in Font A TOUR OF THE MYSQL SOURCE CODE

CHAPTER 3 A TOUR OF THE MYSQL SOURCE CODE
Creating QR Code JIS X 0510 In None
Using Barcode creator for Font Control to generate, create Denso QR Bar Code image in Font applications.
www.OnBarcode.com
Denso QR Bar Code Creator In None
Using Barcode generator for Font Control to generate, create QR Code image in Font applications.
www.OnBarcode.com
Listing 3-19. Example Function Comment Block /* Find tuples by key. SYNOPSIS find_by_key() string key IN Handler_class *handle IN Tuple * OUT
Painting Data Matrix ECC200 In None
Using Barcode printer for Font Control to generate, create Data Matrix 2d barcode image in Font applications.
www.OnBarcode.com
European Article Number 13 Encoder In None
Using Barcode creator for Font Control to generate, create EAN-13 image in Font applications.
www.OnBarcode.com
A string containing the key to find. The class containing the table to be searched. The tuple class containing the key passed.
Create PDF 417 In None
Using Barcode maker for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
Drawing Code 128B In None
Using Barcode creator for Font Control to generate, create Code128 image in Font applications.
www.OnBarcode.com
Uses B Tree index contained in the Handler_class. Calls Index::find() method then returns a pointer to the tuple found. DESCRIPTION This function implements a search of the Handler_class index class to find a key passed. RETURN VALUE SUCCESS (TRUE) != SUCCESS (FALES)
Barcode Generator In None
Using Barcode creation for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
USPS Confirm Service Barcode Generator In None
Using Barcode creation for Font Control to generate, create Planet image in Font applications.
www.OnBarcode.com
Tuple found. Tuple not found.
Scan QR Code In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Recognizing QR In C#
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
WARNING Function can return an empty tuple when a key hit occurs on the index but the tuple has been marked for deletion. NOTES This method has been tested for empty keys and keys that are greater or less than the keys in the index. SEE ALSO Query:;execute(), Tuple.h TODO * Change code to include error handler to detect when key passed in exceeds the maximum length of the key in the index. ERRORS -1 1
2D Generator In VB.NET
Using Barcode generator for .NET Control to generate, create Matrix image in .NET applications.
www.OnBarcode.com
USS-128 Maker In None
Using Barcode maker for Office Excel Control to generate, create UCC-128 image in Microsoft Excel applications.
www.OnBarcode.com
Table not found. Table locked.
ANSI/AIM Code 128 Creator In Objective-C
Using Barcode drawer for iPad Control to generate, create Code 128B image in iPad applications.
www.OnBarcode.com
Print UPC-A In VB.NET
Using Barcode printer for .NET Control to generate, create UPC A image in .NET framework applications.
www.OnBarcode.com
REFERENCED_BY This function is called by the Query::execute() method. */
Paint Code128 In None
Using Barcode generator for Online Control to generate, create Code 128 Code Set C image in Online applications.
www.OnBarcode.com
Painting Code 39 Full ASCII In .NET Framework
Using Barcode maker for .NET framework Control to generate, create ANSI/AIM Code 39 image in Visual Studio .NET applications.
www.OnBarcode.com
CHAPTER 3 A TOUR OF THE MYSQL SOURCE CODE
PDF417 Maker In .NET
Using Barcode maker for Reporting Service Control to generate, create PDF417 image in Reporting Service applications.
www.OnBarcode.com
EAN 13 Decoder In VB.NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Functions and Parameters
Encode GS1 RSS In .NET
Using Barcode creator for .NET Control to generate, create GS1 DataBar image in .NET applications.
www.OnBarcode.com
Recognizing Barcode In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
I want to call these items out specifically because some inconsistencies exist in the source code. If you use the source code as a guide for formatting, you may wander astray of the coding guidelines. Functions and their parameters should be aligned so that the parameters are in vertical alignment. This applies to both defining the function and calling it from other code. In a similar way, variables should be aligned when you declare them. The spacing of the alignment isn t such an issue as the vertical appearance of these items. You should also add line comments about each of the variables. Line comments should begin in column 49 and not exceed the maximum 80-column rule. In the case where a comment for a variable exceeds 80 columns, you should place that comment on a separate line. Listing 3-20 shows examples of the type of alignment expected for functions, variables, and parameters. Listing 3-20. Variable, Function, and Parameter Alignment Examples int var1; /* comment goes here */ long var2; /* comment goes here too */ /* variable controls something of extreme interest and is documented well */ bool var3; return_value *classname::classmethod(int var1, int var2 bool var3); if (classname->classmethod(myreallylongvariablename1, myreallylongvariablename2, myreallylongvariablename3) == -1) { /* do something */ }
Warning If you re developing on Windows, the line break feature of your editor may be set incorrectly.
Most editors in Windows issue a CRLF (/r/n) when you place a line break in the file. MySQL AB requires you to use a single LF (/n), not a CRLF. This is a common incompatibility between files created on Windows versus files created in UNIX or Linux. If you re using Windows, check your editor and make the appropriate changes to its configuration.
Naming Conventions
MySQL AB prefers that you assign your variables meaningful names using all lowercase letters with underscores instead of initial caps. The exception is the use of class names, which are required to have initial caps. Enumerations should be prefixed with the phrase enum_. All structures and defines should be written with uppercase letters. Examples of the naming conventions are shown in Listing 3-21.
CHAPTER 3 A TOUR OF THE MYSQL SOURCE CODE
Listing 3-21. Sample Naming Conventions class My_classname; int my_integer_counter; bool is_saved; #define CONSTANT_NAME 12; int my_function_name_goes_here(int variable1);
Spacing and Indenting
The MySQL coding guidelines state that spacing should always be two characters for each indention level. You should never use tabs. If your editor permits, you should change the default behavior of the editor to turn off automatic formatting and replace all tabs with two spaces. This is especially important when using documentation utilities like Doxygen (which I ll discuss in a moment) or line parsing tools to locate strings in the text. When spacing between identifiers and operators, you should include no spaces between a variable and an operator and a single space between the operator and an operand (the right side of the operator). In a similar way, no space should follow the open parenthesis in functions, but include one space between parameters and no space between the last parameter name and the closing parenthesis. Lastly, you should include a single blank line to delineate variable declarations from control code, and control code from method calls, and block comments from other code, and functions from other declarations. Listing 3-22 depicts a properly formatted excerpt of code that contains an assignment statement, a function call, and a control statement. Listing 3-22. Spacing and Indention return_value= do_something_cool(i, max_limit, is_found); if (return_value) { int var1; int var2; var1= do_something_else(i); if (var1) { do_it_again(); } }
Copyright © OnBarcode.com . All rights reserved.