Programming Forums > Application Development > C

CPU · Apr 27th, 2008, 5:55 AM

GetModuleFileName() function gets filename and its full path.How to retrieve file name without path?

Ancient Dragon · Apr 27th, 2008, 5:58 AM

just chop off the path and you have it.

CPU · Apr 27th, 2008, 6:13 AM

Jabo · Apr 27th, 2008, 6:24 AM

get the index of the last / or \ and do a substring.

Sane · Apr 27th, 2008, 8:16 AM

You want the basename function. Since there is no standard implementation in C, you could use a prewritten implementation.

You generally don't want to write your own, since the format's not always so simple. There are standards, that prewritten implementations have covered.

Ancient Dragon · Apr 27th, 2008, 4:28 PM

Quote:

Originally Posted by CPU

how?

You mean to tell me you are trying to write a windows program and know absolutely nothing about c strings and pointers?

(Toggle Plain Text)

char basename[126] = {0};
char path[] = "c:\\Program Files\\My Directory\\MyProgram.exe";
char *ptr = strrchr(path,'\\');
if(ptr != NULL)
   strcpy(basename,ptr+1);

// Or, you could also do this:
strcpy(path, ptr+1);

CPU · Apr 29th, 2008, 10:48 AM

Quote:

Originally Posted by Ancient Dragon

You mean to tell me you are trying to write a windows program and know absolutely nothing about c strings and pointers?

(Toggle Plain Text)

char basename[126] = {0};
char path[] = "c:\\Program Files\\My Directory\\MyProgram.exe";
char *ptr = strrchr(path,'\\');
if(ptr != NULL)
   strcpy(basename,ptr+1);

// Or, you could also do this:
strcpy(path, ptr+1);

I wrote my own code but i want to learn a simple function can do same job which i dont know.But "Sane" answered my question.and IT IS NOT NECESSARY TO INSULT ME.

lectricpharaoh · Apr 30th, 2008, 6:02 PM

Quote:

Originally Posted by CPU

IT IS NOT NECESSARY TO INSULT ME.

You weren't being insulted. Rather, Ancient Dragon was just surprised you'd be trying to write a Windows program without enough knowledge. You've got to start off small. Windows programming in plain C requires a detailed knowledge of pointers, structures, unions, typedefs, and function pointers, not to mention the Win32 API itself.

Let's face it; if converting "C:\somefolder\someprogram.exe" to "program.exe" is a serious obstacle for you, then your skills aren't yet sharp enough to write a non-trivial Windows program from scratch. This isn't an insult. It's a statement of fact. Try to focus on improving what you do know, and don't assume everyone offering opinions is trying to beat you down.

Sane · Apr 30th, 2008, 6:39 PM

Lectric, there's no indication that the OP could not accomplish that simple case in C.

He even said: "I wrote my own code but i want to learn a simple function can do same job."

So he even did write it, but he wanted to know if there's something tried-and-tested he can use.

Besides, there are standards for the basename of a file path. It's not always as clear-cut as "C:\somefolder\someprogram.exe" to "program.exe". Correct implementation of all standards must be followed. So the OP was correct, and rather smart, in asking about whether or not there's an existing function for this, instead of writing his own.

(Toggle Plain Text)

  
   (1) Strip trailing slashes.
       If string is //, it is implementation-dependent whether 
       steps (2) to (5) are skipped or processed. 

   (2) If string consists entirely of slash characters, string shall be
       set to a single slash character.  In this case, skip steps (3)
       through (5).

   (3) If there are any trailing slash characters in string, they
       shall be removed. 

   (4) If there are any slash characters remaining in string, the prefix
       of string up to an including the last slash character in string
       shall be removed. 

   (5) If the suffix operand is present, is not identical to the
       characters remaining in string, and is identical to a suffix
       of the characters remaining in string, the suffix suffix
       shall be removed from string.  Otherwise, string shall not be
       modified by this step.

Ancient Dragon · Apr 30th, 2008, 7:36 PM

>>Besides, there are standards for the basename of a file path
Sorry, Sane, but there is no such a standard. C languages specificiations make no such statements. The links you posted earlier are only POSIX and do not apply to MS-Windows or MS-DOS. Don't know about other operating systems. So, to say there are standards is just simply misinformation.

GetModuleFileName() as referenced in the OP is a MS-Windows win32 api function, not *nix.

Apr 27th, 2008, 5:55 AM	#1
CPU Newbie Join Date: Apr 2008 Posts: 15 Rep Power: 0	How to retrieve file name without path? GetModuleFileName() function gets filename and its full path.How to retrieve file name without path?

Apr 27th, 2008, 5:58 AM	#2
Ancient Dragon PFO God In Training Join Date: Jun 2005 Location: near St Louis, MO. (USA) Posts: 551 Rep Power: 4	Re: How to retrieve file name without path? just chop off the path and you have it. __________________ True Terror is to wake up one morning and discover that your high school class is running the country - Kurt Vonnegut Jr.

Apr 27th, 2008, 6:13 AM	#3
CPU Newbie Join Date: Apr 2008 Posts: 15 Rep Power: 0	Re: How to retrieve file name without path? how?

Apr 27th, 2008, 6:24 AM	#4
Jabo Not a user? Join Date: Sep 2007 Posts: 274 Rep Power: 2	Re: How to retrieve file name without path? get the index of the last / or \ and do a substring.

Apr 27th, 2008, 8:16 AM	#5
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,890 Rep Power: 5	Re: How to retrieve file name without path? You want the basename function. Since there is no standard implementation in C, you could use a prewritten implementation. Basename.c libgen.h (POSIX Only) - basename() Boost Filesystem Library You generally don't want to write your own, since the format's not always so simple. There are standards, that prewritten implementations have covered. __________________ Waterloo's Canadian Computing Competition (CCC) - Stage 2 Problems, Solutions, and Test Data

Apr 30th, 2008, 6:39 PM	#9
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,890 Rep Power: 5	Re: How to retrieve file name without path? Lectric, there's no indication that the OP could not accomplish that simple case in C. He even said: "I wrote my own code but i want to learn a simple function can do same job." So he even did write it, but he wanted to know if there's something tried-and-tested he can use. Besides, there are standards for the basename of a file path. It's not always as clear-cut as "C:\somefolder\someprogram.exe" to "program.exe". Correct implementation of all standards must be followed. So the OP was correct, and rather smart, in asking about whether or not there's an existing function for this, instead of writing his own. (Toggle Plain Text) (1) Strip trailing slashes. If string is //, it is implementation-dependent whether steps (2) to (5) are skipped or processed. (2) If string consists entirely of slash characters, string shall be set to a single slash character. In this case, skip steps (3) through (5). (3) If there are any trailing slash characters in string, they shall be removed. (4) If there are any slash characters remaining in string, the prefix of string up to an including the last slash character in string shall be removed. (5) If the suffix operand is present, is not identical to the characters remaining in string, and is identical to a suffix of the characters remaining in string, the suffix suffix shall be removed from string. Otherwise, string shall not be modified by this step. (1) Strip trailing slashes. If string is //, it is implementation-dependent whether steps (2) to (5) are skipped or processed. (2) If string consists entirely of slash characters, string shall be set to a single slash character. In this case, skip steps (3) through (5). (3) If there are any trailing slash characters in string, they shall be removed. (4) If there are any slash characters remaining in string, the prefix of string up to an including the last slash character in string shall be removed. (5) If the suffix operand is present, is not identical to the characters remaining in string, and is identical to a suffix of the characters remaining in string, the suffix suffix shall be removed from string. Otherwise, string shall not be modified by this step. __________________ Waterloo's Canadian Computing Competition (CCC) - Stage 2 Problems, Solutions, and Test Data Last edited by Sane; Apr 30th, 2008 at 6:52 PM.

Apr 30th, 2008, 7:36 PM	#10
Ancient Dragon PFO God In Training Join Date: Jun 2005 Location: near St Louis, MO. (USA) Posts: 551 Rep Power: 4	Re: How to retrieve file name without path? >>Besides, there are standards for the basename of a file path Sorry, Sane, but there is no such a standard. C languages specificiations make no such statements. The links you posted earlier are only POSIX and do not apply to MS-Windows or MS-DOS. Don't know about other operating systems. So, to say there are standards is just simply misinformation. GetModuleFileName() as referenced in the OP is a MS-Windows win32 api function, not *nix. __________________ True Terror is to wake up one morning and discover that your high school class is running the country - Kurt Vonnegut Jr.

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