C99 Language Standard
Contents
Foreword
Introduction
1. Scope
2. Normative references
3. Terms, definitions, and symbols
4. Conformance
5. Environment
6. Language
7. Library
7.1 Introduction
7.2 Diagnostics <assert.h>
7.3 Complex arithmetic <complex.h>
7.4 Character handling <ctype.h>
7.5 Errors <errno.h>
7.6 Floating-point environment <fenv.h>
7.7 Characteristics of floating types <float.h>
7.8 Format conversion of integer types <inttypes.h>
7.9 Alternative spellings <iso646.h>
7.10 Sizes of integer types <limits.h>
7.11 Localization <locale.h>
7.12 Mathematics <math.h>
7.13 Nonlocal jumps <setjmp.h>
7.14 Signal handling <signal.h>
7.15 Variable arguments <stdarg.h>
7.16 Boolean type and values <stdbool.h>
7.17 Common definitions <stddef.h>
7.18 Integer types <stdint.h>
7.19 Input/output <stdio.h>
7.20 General utilities <stdlib.h>
7.21 String handling <string.h>
7.22 Type-generic math <tgmath.h>
7.23 Date and time <time.h>
7.24 Extended multibyte and wide character utilities <wchar.h>
7.25 Wide character classification and mapping utilities <wctype.h>
7.25.1 Introduction
7.25.2 Wide character classification utilities
7.25.3 Wide character case mapping utilities
7.25.3.1 Wide character case mapping functions
7.25.3.1.1 The towlower function
7.25.3.1.2 The towupper function
7.25.3.2 Extensible wide character case mapping functions
7.26 Future library directions
Annex A
Annex B
Annex C
Annex D
Annex E
Annex F
Annex G
Annex H
Annex I
Annex J
Bibliography
C99 Language Standard
7. Library
7.25 Wide character classification and mapping utilities <wctype.h>
7.25.3 Wide character case mapping utilities
7.25.3.1 Wide character case mapping functions
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7.25.3.1 Wide character case mapping functions
7.25.3.1.1 The towlower function
7.25.3.1.2 The towupper function