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Top Forums Programming How to trim the white space around a string in C program Post 82734 by matrixmadhan on Tuesday 6th of September 2005 03:24:04 AM
Old 09-06-2005
Hi

this is only a part,

strip leading and trailing spaces; check for specified patterns

#define SUCCESS 1
#define FAILURE 0

// 0-for space and 1-for digit

// you can have allowable patterns in Patterns Array.


char *Patterns[]={"010", "1", "10", "01"};
char *b=" 1 23456";
char *temp;
int i, j=0, len, prev=-1;
len=strlen(b);
temp=(char*)calloc(10, sizeof(char));
for ( i=0; i<len; i++ )
{
if( b[i] != ' ' )
{
if( prev != 1 )
temp[j++]='1';
}
else
{
if( prev != 0 )
temp[j++]='0';
}
prev = ( b[i] == ' ' ) ? 0 : 1;
}
temp[j]='\0';
for ( i=0; i<=3; i++ )
{
if( strcmp(Patterns[i], temp) == 0 )
{
len=strlen(b);
for ( prev=0, j=0; j<len; j++ )
{
if ( b[j] != ' ' )
temp[prev++]=b[j];
}
temp[prev]='\0';
break;
}
}
 

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ustrtok(3alleg4)						  Allegro manual						  ustrtok(3alleg4)

NAME
ustrtok - Retrieves tokens from a string. Allegro game programming library. SYNOPSIS
#include <allegro.h> char *ustrtok(char *s, const char *set); DESCRIPTION
This function retrieves tokens from `s' which are delimited by characters from `set'. To initiate the search, pass the string to be searched as `s'. For the remaining tokens, pass NULL instead. Warning: Since ustrtok alters the string it is parsing, you should always copy the string to a temporary buffer before parsing it. Also, this function is not re-entrant (ie. you cannot parse two strings at the same time). Example: char *word; char string[]="some-words with dashes"; char *temp = ustrdup(string); word = ustrtok(temp, " -"); while (word) { allegro_message("Found `%s' ", word); word = ustrtok(NULL, " -"); } free(temp); RETURN VALUE
Returns a pointer to the token, or NULL if no more are found. SEE ALSO
uconvert(3alleg4), ustrchr(3alleg4), ustrrchr(3alleg4), ustrstr(3alleg4), ustrpbrk(3alleg4), ustrtok_r(3alleg4), allegro_message(3alleg4), ustrncpy(3alleg4), exgui(3alleg4) Allegro version 4.4.2 ustrtok(3alleg4)
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