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Full Discussion: Tokenization
Top Forums Programming Tokenization Post 302136963 by porter on Thursday 20th of September 2007 05:45:29 PM
Old 09-20-2007
strtok - C++ Reference

My understanding is you provide the string and a list of delimiters (commas, spaces etc)

char *reply_ptr=reply;
char *token=NULL;

     token=strtok(reply_ptr,";. \r\n");


     if (token) { .... }

} while (token);

STRTOK(3)						     Linux Programmer's Manual							 STRTOK(3)

strtok, strtok_r - extract tokens from strings SYNOPSIS
#include <string.h> char *strtok(char *s, const char *delim); char *strtok_r(char *s, const char *delim, char **ptrptr); DESCRIPTION
A `token' is a nonempty string of characters not occurring in the string delim, followed by or by a character occurring in delim. The strtok() function can be used to parse the string s into tokens. The first call to strtok() should have s as its first argument. Subse- quent calls should have the first argument set to NULL. Each call returns a pointer to the next token, or NULL when no more tokens are found. If a token ends with a delimiter, this delimiting character is overwritten with a and a pointer to the next character is saved for the next call to strtok(). The delimiter string delim may be different for each call. The strtok_r() function is a reentrant version of the strtok() function, which instead of using its own static buffer, requires a pointer to a user allocated char*. This pointer, the ptrptr parameter, must be the same while parsing the same string. BUGS
Never use these functions. If you do, note that: These functions modify their first argument. These functions cannot be used on constant strings. The identity of the delimiting character is lost. The strtok() function uses a static buffer while parsing, so it's not thread safe. Use strtok_r() if this matters to you. RETURN VALUE
The strtok() function returns a pointer to the next token, or NULL if there are no more tokens. CONFORMING TO
strtok() SVID 3, POSIX, BSD 4.3, ISO 9899 strtok_r() POSIX.1c SEE ALSO
index(3), memchr(3), rindex(3), strchr(3), strpbrk(3), strsep(3), strspn(3), strstr(3) GNU
2000-02-13 STRTOK(3)
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