Here are the man pages for the library functions: This is for edlib version 1.0 04/08/88 BINTOINT(3) Library Functions BINTOINT(3) NAME bintoint - give the binary value of a string of binary digits SYNOPSIS #include int bintoint(number) char *number; DESCRIPTION Bintoint takes a string that may have been read in with scanf(3) or from the console, and treats it as if it were a binary number. The integer value of the binary number is returned. Bintoint stops at the first character that is not a '1' or a '0'. If the first character in the string is not a binary digit, then a value of 0 is returned. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO dectoint(3), hextoint(3), toint(3) GETOPT(3) Library Functions GETOPT(3) NAME getopt - get option letter from argv SYNOPSIS #include int getopt(argc, argv, optstring) inta argc; char **optstring; extern char *optarg; extern int optind; DESCRIPTION Getopt returns the next option letter in argv that matches a letter in optstring. Optstring is a string of recognized option letters; if a letter is followed by a colon, the option is expected to have an argument that may or may not be separated from it by white space. Optarg is set to point to the start of the option argument on return from getopt. Getopt places in optind the argv index of the next argument to be processed. Because optind is external, it is normally initialized to zero automatically before the first call to getopt. When an option that is not in the list occurs, a NULL is returned and the optarg pointer is set to point to the first character of the null terminated string. This is done so that options may be specified with other parameters interspersed between them. DIAGNOSTICS Getopt prints an error message on stderr and returns a ques- tion mark (?) when it encounters an option letter not included in optstring. EXAMPLE The following code fragment shows how one might process the arguments for a command that can take the mutually exclusive options a and b, and the options f and o, both of which require arguments: main(argc, argv) int argc; char **argv; { int c; extern int optind; extern char *optarg; . . . while ((c = getopt(argc, argv, "abf:o:")) != EOF) switch (c) { case `a': if (bflg) errflg++; else aflg++; break; case `b': if (aflg) errflg++; else bproc(); break; case `f': ifile = optarg; break; case `o': ofile = optarg; break; case `?': default: errflg++; break; } if (errflg) { fprintf(stderr, "Usage: ..."); exit(2); } for (; optind < argc; optind++) { . . . } . . . } HISTORY Written by Henry Spencer, working from a Bell Labs manual page. Modified by Keith Bostic to behave more like the Sys- tem V version. Ported to the Amiga and modified to take options anywhere by Edwin (Deepthot) Hoogerbeets. BUGS It is not obvious how `-' standing alone should be treated; this version treats it as a non-option argument, which is not always right. Option arguments are allowed to begin with `-'; this is rea- sonable but reduces the amount of error checking possible. Getopt is quite flexible but the obvious price must be paid: there is much it could do that it doesn't, like checking mutually exclusive options, checking type of option argu- ments, etc. DECTOINT(3) Library Functions DECTOINT(3) NAME dectoint - give the decimal value of a string of decimal digits SYNOPSIS #include int dectoint(number) char *number; DESCRIPTION Dectoint takes a string that may have been read in with scanf(3) or from the console, and treats it as if it were a decimal number. The integer value of the decimal number is returned. Dectoint stops at the first character that is not a decimal digit. If the first character in the string is not a decimal digit, then a value of 0 is returned. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO bintoint(3), hextoint(3), toint(3) HEXTOINT(3) Library Functions HEXTOINT(3) NAME hextoint - give the decimal value of a string of decimal digits SYNOPSIS #include int hextoint(number) char *number; DESCRIPTION Hextoint takes a string that may have been read in with scanf(3) or from the console, and treats it as if it were a hexadecimal number. The integer value of the hexadecimal number is returned. Hextoint stops at the first character that is not a hexadecimal digit. If the first character in the string is not a hexadecimal digit, then a value of 0 is returned. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO bintoint(3), dectoint(3), toint(3) ISBDIGIT(3) Library Functions ISBDIGIT(3) NAME isbdigit - tell whether given character is a binary digit SYNOPSIS #include int isbdigit(c) char c; DESCRIPTION Isbdigit returns a 1 if the given characters is either a '1' or a '0'. Isbdigit returns a 0 for all other characters. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO isdigit(3), isodigit(3), isxdigit(3) ISCSYM(3) Library Functions ISCSYM(3) NAME iscsym - tell whether given character could be found in a C symbol SYNOPSIS #include int iscsym(c) char c; DESCRIPTION Iscsym tells whether it is possible that the given character could appear in a C symbol. A C symbol might be the name of a variable, structure, reserved word or a function. Not all characters that are valid in a C symbol may be the first character of an identifier in most implementations of C. In most versions, the characters allowed after the first character are the upper and lower case alphabetic characters, the digits '0' to '9' and the underscore (_). AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO iscsymf(3) BUGS This function depends on the C compiler used, and thus the characters that are valid in a C symbol may be different, even on the same machine. ISCSYMF(3) Library Functions ISCSYMF(3) NAME iscsymf - tell whether given character could be found as the first character of a C symbol SYNOPSIS #include int iscsymf(c) char c; DESCRIPTION Iscsymf tells whether it is possible that the given character could appear as the first character of a C symbol. A C symbol might be the the name of a variable, structure, reserved word or a functions. Not all characters that are valid in a C symbol may be the first character of an identifier in most implementations of C. In most versions, the characters allowed as the first character are the upper and lower case alphbetic characters and the underscore (_). AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO iscsym(3) BUGS This function depends on the C compiler used, and thus the characters that are valid as the intial character in a C symbol may be different, even on the same machine. ISODIGIT(3) Library Functions ISODIGIT(3) NAME isodigit - tell whether given character is an octal digit SYNOPSIS #include int isodigit(c) char c; DESCRIPTION Isodigit returns a 1 if the given characters is an octal digit. Isodigit returns a 0 for all other characters. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO isdigit(3), isbdigit(3), isxdigit(3) STOUPPER(3) Library Functions STOUPPER(3) NAME stoupper - convert a string to only upper case characters SYNOPSIS #include char *stoupper(str) char *str; DESCRIPTION Stoupper takes a pointer to a null terminated string and converts each lower case character into its upper case equivalent. All other characters are left untouched. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO stolower(3) STOLOWER(3) Library Functions STOLOWER(3) NAME stolower - convert a string to only lower case characters SYNOPSIS char *stolower(str) char *str; DESCRIPTION Stolower takes a pointer to a null terminated string and converts each upper case character into its lower case equivalent. All other characters are left untouched. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO stoupper(3) STRCSPN(3) Library Functions STRCSPN(3) NAME strcspn - find the length of the longest intial segment of a string that consists of characters not from a certain set. SYNOPSIS #include int strcspn(str, charset) char *str, *charset; DESCRIPTION Strcspn searches the null terminated string 'str' for characters in the set 'charset'. The length of the longest intial string that consists of characters not from 'charset' is returned. If no characters of 'str' are also members of 'charset', then the length of 'str' is returned. If 'charset' is null then this will also cause the full length of 'str' to be returned. This function is also known as instr. AUTHOR Daniel J. Barrett. barrett@cs.jhu.edu or ins_adjb@jhunix.UUCP SEE ALSO strspn(3) STRICMP(3) Library Functions STRICMP(3) NAME stricmp - compare two strings with case insensitivity SYNOPSIS #include int stricmp(str1,str2) char *str1,*str2; DESCRIPTION Stricmp lexographically compares the two null terminated strings. It returns a number less than zero if the first differing character of str1 is less than that of str2, zero if the two strings are equal, and a number greater than zero if the first differing character in str1 is greater than the corresponding character of str2. Stricmp works like strcmp(3) except that all alphabetic characters are treated as lower case for the purposes of the comparison. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO strcmp(3), strncmp(3), strnicmp(3) STRNICMP(3) Library Functions STRNICMP(3) NAME strnicmp - compare two strings with case insensitivity up to a certain length SYNOPSIS #include int strnicmp(str1,str2,len) char *str1,*str2; int len; DESCRIPTION Strnicmp lexographically compares the two null terminated strings up to the length 'len'. It returns a number less than zero if the first differing character of str1 is less than that of str2, zero if the two strings are equal, and a number greater than zero if the first differing character in str1 is greater than the corresponding character of str2. Strnicmp works like strncmp(3) except that all alphabetic characters are treated as lower case for the purposes of the comparison. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO strcmp(3), strncmp(3), stricmp(3) STRPBRK(3) Library Functions STRPBRK(3) NAME strpbrk - find the first occurance of a character of a set in a string SYNOPSIS #include char *strpbrk(str, charset) char *str, *charset; DESCRIPTION Strpbrk searches forwards through the null terminated string 'str' for occurances of a character included in the character set 'charset'. The 'charset' variable is null terminated string that is treated as a character set. Therefore, repetition and order are ignored. Strpbrk returns a pointer to the first character of 'charset' that is found in 'str'. DIAGNOSTICS If no character in 'charset' is found in 'str', then a null pointer (NULL) is returned. AUTHOR Daniel J. Barrett. barrett@cs.jhu.edu or ins_adjb@jhunix.UUCP SEE ALSO strrpbrk(3), strcspn(3), strspn(3) STRPOS(3) Library Functions STRPOS(3) NAME strpos - give the first position of a character withing a string SYNOPSIS #include int strpos(string,key) char *string; char key; DESCRIPTION Strpos searches the null terminated string 'string' for the first occurance of the character 'key'. The position of this character is returned. The terminating null character is considered to be part of the string for the purposes of this search. Thus, using strpos to find the null will give the same result as a strlen(3). Some implementations of C use a variant called scnstr. DIAGNOSTICS Strpos returns a -1 if the character is not found in the string. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO strrpos(3) STRRPBRK(3) Library Functions STRRPBRK(3) NAME strrpbrk - find the last occurance of a character of a set in a string SYNOPSIS #include char *strrpbrk(str, charset) char *str, *charset; DESCRIPTION Strrpbrk searches backwards through the null terminated string 'str' for occurances of a character included in the character set 'charset'. The 'charset' variable is null terminated string that is treated as a character set. Therefore, repetition and order are ignored. Strrpbrk returns a pointer to the last character of 'charset' that is found in 'str'. DIAGNOSTICS If no character in 'charset' is found in 'str', then a null pointer (NULL) is returned. AUTHOR Edwin Hoogerbeets 01/08/88 modified from strpbrk(3) by: Daniel J. Barrett. barrett@cs.jhu.edu or ins_adjb@jhunix.UUCP SEE ALSO strpbrk(3), strcspn(3), strspn(3) STRRPOS(3) Library Functions STRRPOS(3) NAME strrpos - give the last position of a character withing a string SYNOPSIS #include int strrpos(string,key) char *string; char key; DESCRIPTION Strrpos searches the null terminated string 'string' for the last occurance of the character 'key'. The position of this character is returned. The terminating null character is considered to be part of the string for the purposes of this search. Thus, using strrpos to find the null will give the same result as a strlen(3). DIAGNOSTICS Strrpos returns a -1 if the character is not found in the string. AUTHOR Edwin Hoogerbeets 01/08/88 SEE ALSO strpos(3) STRSPN(3) Library Functions STRSPN(3) NAME strspn - find the length of the longest intial segment of a string that consists of characters from a certain set. SYNOPSIS #include int strspn(str, charset) char *str, *charset; DESCRIPTION Strspn searches the null terminated string 'str' for characters in the set 'charset'. The length of the longest intial string that consists of characters from 'charset' is returned. If all characters of 'str' are also members of 'charset', then the length of 'str' is returned. If 'charset' is null then this function will return a zero as none of the characters in 'str' could possibly be in the set. This function is also known as notstr. AUTHOR Daniel J. Barrett. barrett@cs.jhu.edu or ins_adjb@jhunix.UUCP SEE ALSO strcspn(3) STRTOK(3) Library Functions STRTOK(3) NAME strtok - search a string for tokens delimited by characters from a set SYNOPSIS #include char *strtok(buf, separators) char *buf, *separators; DESCRIPTION Strtok searches the null terminated string 'buf' for tokens delimited by characters from the character set 'separators'. The null terminated string 'separators' is treated as a set. Thus, repetition and order are ignored. Strtok replaces the separator character with a null byte and returns a pointer to the beginning of the token, effectively singling out the first token. Subsequent calls to strtok with the parameter 'buf' set to NULL returns the next token after the previous one using the same string as previous invocations. The character set 'separators' may be different at each invocation. DIAGNOSTICS If no token is found, a NULL pointer is returned. EXAMPLE Here is an example program demonstrating strtok(3). #include extern char *strtok(); char tokesep[] = " \n\t\rx"; main() { char buf[BUFSIZ], *tokep; while (fgets(buf, sizeof(buf), stdin)) { tokep = strtok(buf, tokesep); do { printf("Token is %s\n", tokep); tokep = strtok((char *)NULL, tokesep); }while (tokep); } } AUTHOR Daniel J. Barrett. barrett@cs.jhu.edu or ins_adjb@jhunix.UUCP TOINT(3) Library Functions TOINT(3) NAME toint - return the hexadecimal value of a character SYNOPSIS #include int toint(c) char c; DESCRIPTION Toint treats the character 'c' as a hexadecimal character and returns its integer equivalent. DIAGNOSTICS returned. AUTHOR Edwin Hoogerbeets 01/08/88