Difference between revisions of "User:Lkates"
(→Code Reading Exercise) |
m |
||
Line 4: | Line 4: | ||
I'm a 4/5/6/7th semester BSD student. I transferred in after completing CTY. Since the programs are similar yet different, I'm taking courses from all over the cirriculum. | I'm a 4/5/6/7th semester BSD student. I transferred in after completing CTY. Since the programs are similar yet different, I'm taking courses from all over the cirriculum. | ||
− | In my spare time (what little there is), I pursue a myrid of hobbies in a very Jack-of-all-Trades manner. I read, write, play the guitar, and cook. My first short story was published earlier this year in the anthology [http://www.chapters.indigo.ca/books/item/books-978088995340/0889953406/Mythspring?ref=Search | + | In my spare time (what little there is), I pursue a myrid of hobbies in a very Jack-of-all-Trades manner. I read, write, play the guitar, and cook. My first short story was published earlier this year in the anthology [http://www.chapters.indigo.ca/books/item/books-978088995340/0889953406/Mythspring?ref=Search Books: 'mythspring' Mythspring] |
I also run a yard haunt in Newmarket. Pictures from 2004, and some from 2005, are [http://houghtonhaunt.com posted on the haunt's site]. | I also run a yard haunt in Newmarket. Pictures from 2004, and some from 2005, are [http://houghtonhaunt.com posted on the haunt's site]. | ||
Line 23: | Line 23: | ||
'''make''' | '''make''' | ||
− | First I looked at loadargc, since argc reminds me of the C/C | + | First I looked at loadargc, since argc reminds me of the C/C standard command line variables that you use in main. However, that turned out to be a load balancing program. Next I looked at Main.h, since main seems like a good start, and headers tend to define stuff. But there wasn’t anything useful there. So I opened Main.c, and voila! Code that has to do with command line switches. |
. What are your first reactions to these files when you examine them? | . What are your first reactions to these files when you examine them? | ||
Line 94: | Line 94: | ||
static const struct command_switch switches[] = | static const struct command_switch switches[] = | ||
{ 'b', ignore, 0, 0, 0, 0, 0, 0, 0 }, | { 'b', ignore, 0, 0, 0, 0, 0, 0, 0 }, | ||
− | { 'B', flag, (char *) | + | { 'B', flag, (char *) |
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− |
Revision as of 16:42, 10 April 2007
Lorne Kates' User Page.
Me
I'm a 4/5/6/7th semester BSD student. I transferred in after completing CTY. Since the programs are similar yet different, I'm taking courses from all over the cirriculum.
In my spare time (what little there is), I pursue a myrid of hobbies in a very Jack-of-all-Trades manner. I read, write, play the guitar, and cook. My first short story was published earlier this year in the anthology Books: 'mythspring' Mythspring
I also run a yard haunt in Newmarket. Pictures from 2004, and some from 2005, are posted on the haunt's site.
My email: lkates@learn.senecac.on.ca
IRC handle: halcyon1234
BTP600
BTP600 course material goes here. I wouldn't mind doing the Wikipedia Design Pattern stub.
Code Reading Exercise
Looking at MAKE and ???
- Which file(s) did you have to examine?
make First I looked at loadargc, since argc reminds me of the C/C standard command line variables that you use in main. However, that turned out to be a load balancing program. Next I looked at Main.h, since main seems like a good start, and headers tend to define stuff. But there wasn’t anything useful there. So I opened Main.c, and voila! Code that has to do with command line switches.
. What are your first reactions to these files when you examine them?
make I don’t think I can put them down, in accordance to Seneca’s Acceptable Use Policy. But the sheer amount of code and underscores and structs were a bit overwhelming.
. How is the code for working with command-line switches organized at the method, class and project levels? (e.g. is is all in one class? broken across multiple classes? spread across many methods? etc)
make There are a couple methods defined right near the beginning:
static void decode_switches PARAMS ((int argc, char **argv, int env)); static void decode_env_switches PARAMS ((char *envar, unsigned int len));
Almost immediately afterwards, there's the structure for an acceptable command line switch
/* The structure that describes an accepted command switch. */
struct command_switch
{ int c; /* The switch character. */
enum /* Type of the value. */ {
flag, /* Turn int flag on. */ flag_off, /* Turn int flag off. */ string, /* One string per switch. */ positive_int, /* A positive integer. */ floating, /* A floating-point number (double). */ ignore /* Ignored. */
} type;
char *value_ptr; /* Pointer to the value-holding variable. */
unsigned int env:1; /* Can come from MAKEFLAGS. */ unsigned int toenv:1; /* Should be put in MAKEFLAGS. */ unsigned int no_makefile:1; /* Don't propagate when remaking makefiles. */
char *noarg_value; /* Pointer to value used if no argument is given. */ char *default_value;/* Pointer to default value. */
char *long_name; /* Long option name. */ };
Main.c then goes on to define a usage output, that is used to define, in English, how to use all the different flags. Presumably, this is used when the /h switch is used
/* The usage output. We write it this way to make life easier for the
translators, especially those trying to translate to right-to-left languages like Hebrew. */
static const char *const usage[] = ...
N_("\ -h, --help Print this message and exit.\n"),
...
Afterwards, there is a table of the command switches, along with a bunch of flags and numbers I don't understand.
/* The table of command switches. */
static const struct command_switch switches[] =
{ 'b', ignore, 0, 0, 0, 0, 0, 0, 0 }, { 'B', flag, (char *)