Narrow null-terminated strings

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C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Strings library
Narrow character strings Wide character strings Classes basic_string char_traits
Narrow null-terminated strings
Functions Character manipulation isalnum isalpha islower isupper isdigit isxdigit isblank (C++11) iscntrl isgraph isspace isprint ispunct tolower toupper Conversions to numeric formats atof atoi strtol strtoul strtof String manipulation strcpy strncpy strcat strncat strxfrm String examination strlen strcmp strncmp strcoll strchr strrchr strspn strcspn strpbrk strstr strtok Memory manipulation memchr memcmp memset memcpy memmove Miscellaneous strerror

A null-terminated character string, or NTBS, is a character sequence, that consists of nonzero elements, except the last element (the terminating null-character), which has the value zero.

A null-terminated multibyte character string, or NTMBS, is a null-terminated character string, that consists of valid multibyte characters. The string must begin and end with the shift state. A multibyte character string is compatible with regular character strings, that is, can be processed using the same facilities, except for the length calculation.

This section is incomplete Reason: explain shift state

Contents 1 Functions 1.1 Character manipulation 1.2 Conversions to numeric formats 1.3 String manipulation 1.4 String examination 1.5 Memory manipulation 1.6 Miscellaneous Functions
Character manipulation
isalnum	checks if a character is alphanumeric (function)
isalpha	checks if a character is alphabetic (function)
islower	checks if a character is lowercase (function)
isupper	checks if a character is an uppercase character (function)
isdigit	checks if a character is a digit (function)
isxdigit	checks if a character is a hexadecimal character (function)
iscntrl	checks if a character is a control character (function)
isgraph	checks if a character is a graphical character (function)
isspace	checks if a character is a space character (function)
isblank (C++11)	checks if a character is a blank character (function)
isprint	checks if a character is a printing character (function)
ispunct	checks if a character is a punctuation character (function)
tolower	converts a character to lowercase (function)
toupper	converts a character to uppercase (function)

ASCII values (hex)		characters	iscntrl iswcntrl	isprint iswprint	isspace iswspace	isblank iswblank	isgraph iswgraph	ispunct iswpunct	isalnum iswalnum	isalpha iswalpha	isupper iswupper	islower iswlower	isdigit iswdigit	isxdigit iswxdigit
0 - 8	0x00-0x08	control codes (NUL, etc.)	≠0	0	0	0	0	0	0	0	0	0	0	0
9	0x09-0x0D	tab (\t)	≠0	0	≠0	≠0	0	0	0	0	0	0	0	0
10 - 13	0x09-0x0D	whitespace (\f,\v,\n,\r)	≠0	0	≠0	0	0	0	0	0	0	0	0	0
14 - 31	0x0E-0x1F	control codes	≠0	0	0	0	0	0	0	0	0	0	0	0
32	0x20	space	0	≠0	≠0	≠0	0	0	0	0	0	0	0	0
33 - 47	0x21-0x2F	!"#$%&'()*+,-./	0	≠0	0	0	≠0	≠0	0	0	0	0	0	0
48 - 57	0x30-0x39	01234567890	0	≠0	0	0	≠0	0	≠0	0	0	0	≠0	≠0
58 - 64	0x3a-0x40	:;<=>?@	0	≠0	0	0	≠0	≠0	0	0	0	0	0	0
65 - 70	0x41-0x46	ABCDEF	0	≠0	0	0	≠0	0	≠0	≠0	≠0	0	0	≠0
71 - 90	0x47-0x5A	GHIJKLMNOPQRSTUVWXYZ	0	≠0	0	0	≠0	0	≠0	≠0	≠0	0	0	0
91 - 96	0x5B-0x60	[\]^_`	0	≠0	0	0	≠0	≠0	0	0	0	0	0	0
97 -102	0x61-0x66	abcdef	0	≠0	0	0	≠0	0	≠0	≠0	0	≠0	0	≠0
103-122	0x67-0x7A	ghijklmnopqrstuvwxyz	0	≠0	0	0	≠0	0	≠0	≠0	0	≠0	0	0
123-126	0x7B-0x7E	{|}~	0	≠0	0	0	≠0	≠0	0	0	0	0	0	0
127	0x7F	backspace character (DEL)	≠0	0	0	0	0	0	0	0	0	0	0	0

Conversions to numeric formats
atof	converts a character string to a floating point value (function)
atoi atol atoll	converts a character string to an integer value (function)
strtol strtoll	converts a character string to an integer value (function)
strtoul strtoull	converts a character string to an unsigned integer value (function)
strtof strtod strtold	converts a character string to a floating point value (function)
String manipulation
strcpy	copies one string to another (function)
strncpy	copies a certain amount of characters from one string to another (function)
strcat	concatenates two strings (function)
strncat	concatenates a certain amount of characters of two strings (function)
strxfrm	converts a substring so that it can be used by string comparison functions (function)
String examination
strlen	returns the length of a given string (function)
strcmp	compares two strings (function)
strncmp	compares a certain amount of characters of two strings (function)
strcoll	compares two strings in accordance to the current locale (function)
strchr	finds the first occurrence of a character (function)
strrchr	finds the last occurrence of a character (function)
strspn	returns the length of the maximum initial segment that consists of only the characters found in another character string (function)
strcspn	returns the length of the maximum initial segment that consists of only the characters not found in another character string (function)
strpbrk	finds the first location of any character in one string, in another string (function)
strstr	finds the first occurrence of a substring of characters (function)
strtok	finds the next token in a character string (function)
Memory manipulation
memchr	searches an array for the first occurrence of a character (function)
memcmp	compares two buffers (function)
memset	fills a buffer with a character (function)
memcpy	copies one buffer to another (function)
memmove	moves one buffer to another (function)
Miscellaneous
strerror	returns a text version of a given error code (function)