dispatch table with function pointers in C simple sample

#include "stdio.h"
#include "string.h"

void foo() {
printf("in foo\n");
}
void bar() {
printf("in bar\n");
}
void foo2() {
printf("in foo2\n");
}
struct table_entry_s { char *name; void(*function)(); };

typedef struct table_entry_s table_t;

//populate the table
table_t dispatchTable[256] =
{ {"foo", foo}, {"bar", bar}, {"foo2", foo2}, {NULL, NULL} };

#define NUM_ENTRIES 3

void dispatchKernel(char *string)
{
int iFound = 0;

printf("dispatchKernel with %s\n", string);

for (int i = 0; i < NUM_ENTRIES; i++)
{
char *result = NULL;
result = strstr(string, dispatchTable[i].name);
if (result == NULL)
{
printf("%s was not in %s\n", dispatchTable[i].name, string);
}
else
{
iFound = 1;
printf("Found %s in %s\n", dispatchTable[i].name, string);
dispatchTable[i].function();
}
}
}

void main()
{
printf("hello\n");

printf("dispatchTable[0] name = %s\n", dispatchTable[0].name);
printf("dispatchTable[1] name = %s\n", dispatchTable[1].name);
printf("dispatchTable[2] name = %s\n", dispatchTable[2].name);

dispatchTable[0].function();
dispatchTable[1].function();
dispatchTable[2].function();

dispatchKernel("fdafsdbarfdsafs");

printf("goodbye\n");

}

doxygen getting started

i'm sure i'll add more to this later, but just spent an hour getting this up and running and don't want to forget this:

when creating the doxyfile.txt for your project, if you want to add (for example) .cl files as input, you might need to make the addition in two places. first to tell it to look for these types of files and the second is how you want these files treated when parsing the marked up file: EXTENSION_MAPPING as well as FILE_PATTERNS variable. Also don't forget to point the OUTPUT_DIRECTORY and INPUT to the appropriate locations.

EXTENSION_MAPPING      = cl=C

and add this to FILE_PATTERNS = blah blah \ *.cl


Your file won't be parsed if you don't add this to the top of the .cl file (self referential statement):

/*! \file blah.cl
\brief A test file class.

A more detailed class description.
*/

Running Doxygen (basics):

To run doxygen (assuming it has been added to your path) you can traverse to the directory that the template you generated lives (doxyfile.txt) and it will grab the template. Not recommending this for production but just for getting things up and running.

Creating Labels for Excel Columns

If you want the columns to have a label, the term you are looking for is 'categories', which does make sense, just not the way i was thinking about it, usually 'x-axis, y-axis or something like that in my head'

To give your columns names, select the little funnel looking icon, go to 'horizontal (category) axis labels' select 'edit', then select the names you want each column to have from your spreadsheet and the fields will populate as you expect.

just another note for my own personal FYI.

Do i need an escape for a filename when passing to fopen in this case: c:\\foo\\bar\\readme.txt

no escape for the colon ':'

use like the subject line

Creating a very primitive installation tool: Using winzip to create archives that preserve directory structure

Even when i do an internal project, i like to create a quick installer package for anybody else who might want to use the tool(s). Winzip has a nice command line interface to make this happen, however it took an hour poking through documentation (and 7z proved non-obvious as to how to do it, and online notes suggested the developer is not too interested in making this use case easy..read about it on superuser.com).

The specific challenge is the right parameters to get the entire directory structure when you unzip at the destination. To me, this would be quite a useful mode of any zip/archive tool, yet the default is baffling a flat directory structure, surprise! Even using the GUI default modes does the expected thing..so it would seem NOT preserving the directory structure is the uncommon case, but that rant is not why i am writing this note for later.

So, here's the scoop:
using winzip, archive using this:
"c:\program files\winzip\wzzip" -P -r file.zip @BenchFileList.txt

where BenchFileList.txt has a format like this:

".\docs\bench-overview.pptx"
".\docs\sim-overview.pptx"
".\docs\GPU Architectures.docx"
".\docs\queues-and-contexts.pptx"

".\Bench\source\Bench.sln"

DO NOT INCLUDE THE '.' IN THE STRINGS IF YOU WANT IT TO SHOW THE DIRECTORY NAMES AT THE TOP.

and you will get what you expect: when you unzip you will have a directory structure such that your solution and project files are where they are expected to be.

--adam

migrating C functions when code refactoring

functions: 
functions are default extern, so you don't need the extern on them when you move the declaration to a header file and definitions to a new file.

when adding the functions to the new cpp file, move the full function over, put the declaration in the header, include the header in the old file you are migrating from but still intend to reference the function. include the new header in the old function.

for the new .cpp file with the code that has migrated from the old .cpp to the new .cpp, include the new header file.

include the .cpp file for the new code in the project as well. or just wait until visual studio complains you forgot this step, come here to re-read this blog post, then do it :)

TODO: add an example here for clarity, but not tonight :)

enums, structs, typedefs of a global struct when code refactoring in C

i often end up in a situation where i've prototyped something in a small testspace then things work out and you want to reuse those tools as you build out another project in the same solution. i've run into this twice in the past year and spent 10 minutes resolving a misunderstanding of intent between the compiler and myself so i'm posting here to save time in the future. note this is for an internal test utility and not product code which shouldn't have any (or very few) globals in the first place, so i'm not putting this here as a shining example of how to do something but instead as how i resolve this specific issue.

here's the refactoring steps:

1. put the typedef and structure in the header file.

typedef struct foo_s { } foo_t;

2. put the declaration into one of the files (the central utility file for example):

foo_t foo;

3. when you want to reference the variable foo in another .c file, use this:

extern foo_t foo;



Enums follow the same pattern, put this in a header:
typedef enum eMODEL_MODE {
SINGLE_MODEL,
MULTI_MODEL,
MANY_MODEL
} eModelMode_t;

Declare the value into one of the other files:
eModelMode_t g_eModelMode = SINGLE_MODEL;

Reference like so:
extern eModelMode_t g_eModelMode;

Where does Ashes of the Singularity store benchmark data?

C:\Users\adam_\Documents\my games\Ashes of the Singularity\Benchmarks

GPUView

log.cmd file location

C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\gpuview

location to download from:
click on 'windows assessment ....' link in first sentence of page:
https://msdn.microsoft.com/en-us/library/windows/hardware/dn927310(v=vs.85).aspx


you only need the windows performance toolkit, a few hundred MB vs. all the 6GB+ of what they try to convince you to download by default.

To use:

• must be administrator level shell
• go to directory above. 
• type log to start
• type log to end
• view with gpuview

Which version of windows am i running? Type 'winver' at command prompt

Reminders for a las vegas trip

limited number of wifi devices at some hotels (4 at wynn)
excess 3$ credit card fee on taxis
resort fee for hotel (~$35)
no hot water making capability in some rooms, bring something to heat water

queens/rooms with 2 beds on golf resort side, room feels smaller
preference is strip-side not golf side.
paid $40 (including tax) for panorama upgrade, worth it, don't like the smaller/lower rooms, not worth cost of travel to get there IMO.
require king panorama upgrade on strip side

check on pool availability, wind effects, also december will not have both pool available.
colder in dec. not likely to want to use pool at that point.
dolphin and tigers $20/head. interesting, but mandalay bay is better value
paris baguette has/had poke bowls, great lunch value
early checkin just a rip off that puts in you in crappy room they couldn't sell the night before

flight: 6am out to arrive in vegas early was not needed.
leaving around 2pm was great.
recommend next time to depart later but perfect leave time given check out was noon.

don't forget pre-check for everyone in party