trim heading and trailing space
-
Hello everyone, I think in built-in C/C++ functions, there is no direct function call to trim heading and trailing space characters, right? So, we have to implement it manually by iterating the string to check character one by one. Support not using MFC. thanks in advance, George
-
Hello everyone, I think in built-in C/C++ functions, there is no direct function call to trim heading and trailing space characters, right? So, we have to implement it manually by iterating the string to check character one by one. Support not using MFC. thanks in advance, George
http://www.codeproject.com/vcpp/stl/stdstringtrim.asp[^]
Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
-
Hello everyone, I think in built-in C/C++ functions, there is no direct function call to trim heading and trailing space characters, right? So, we have to implement it manually by iterating the string to check character one by one. Support not using MFC. thanks in advance, George
G'day George, dBaseIII had a popular function for this purpose, alltrim. In the mid nineties i needed that function in C and wrote the following implementation, plain C code.
char *alltrim( char *t) { unsigned char *t_, *tc_; int i=0, l; l = strlen(t); tc_ = (unsigned char*) t; /* Remove all spaces before any usefull characters */ while (*(tc_+i) <= ' ' && i < l) i++; if (i==l) /* Everything is white space */ { *t = (char) 0; /* return an empty string */ return t; } else t_ = ( unsigned char* ) (t+i); /* t_ points to the first non-whitespace */ /* Process the rear end of the string */ i=l-1; while (*(tc_+i) <= ' ') i--; i++; /* Index of the 1st whitespace at the rear end of the text */ *(t+i) = ( char ) 0; /* change into ASCIIZ */ l = strlen((char*) t_) + 1; /* Length clean string + ASCIIz */ memmove(t, t_, l); /* Secure even when overlapping */ return t; }Unfortunatedly the preview of the code looks awfull, like it has been handled by alltrim itself. Regards, Henk 21cm: the universal wavelength of neutral hydrogen -
G'day George, dBaseIII had a popular function for this purpose, alltrim. In the mid nineties i needed that function in C and wrote the following implementation, plain C code.
char *alltrim( char *t) { unsigned char *t_, *tc_; int i=0, l; l = strlen(t); tc_ = (unsigned char*) t; /* Remove all spaces before any usefull characters */ while (*(tc_+i) <= ' ' && i < l) i++; if (i==l) /* Everything is white space */ { *t = (char) 0; /* return an empty string */ return t; } else t_ = ( unsigned char* ) (t+i); /* t_ points to the first non-whitespace */ /* Process the rear end of the string */ i=l-1; while (*(tc_+i) <= ' ') i--; i++; /* Index of the 1st whitespace at the rear end of the text */ *(t+i) = ( char ) 0; /* change into ASCIIZ */ l = strlen((char*) t_) + 1; /* Length clean string + ASCIIz */ memmove(t, t_, l); /* Secure even when overlapping */ return t; }Unfortunatedly the preview of the code looks awfull, like it has been handled by alltrim itself. Regards, Henk 21cm: the universal wavelength of neutral hydrogenThanks Henk, I think you mean there is no built-in function. regards, George
-
http://www.codeproject.com/vcpp/stl/stdstringtrim.asp[^]
Christian Graus - Microsoft MVP - C++ "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
Hi Christian, It is implemented by find_first_not_of and find_last_not_of of STL string, no built-in functions. regards, George