Libc
Module: std.c
Platform-dependent aliases via preprocessor. Core: c_char, c_schar, c_uchar, c_short, c_ushort, c_int, c_uint, c_long, c_ulong, c_longlong, c_ulonglong, c_float, c_double, c_size_t, c_ptrdiff_t, c_intptr_t, c_uintptr_t, c_ssize_t, c_wchar_t, c_pid_t, c_uid_t and others.
FILE, fopen, fclose, fread, fwrite, fgets, fputs, printf family, stdin/stdout/stderr.
stdlib
Section titled “stdlib”malloc, free, realloc, exit, atoi family, qsort, bsearch.
string
Section titled “string”memcpy, memset, memcmp, strlen, strcpy, strcmp, strstr family.
Re-exported through std.math - see there. Raw in std.c.math: fabs, sin, cos, sqrt, pow, exp, log and others.
Other headers
Section titled “Other headers”ctype (isalpha, isdigit …), errno (EPERM, ENOENT …), float (FLT_MAX …), limits (CHAR_MAX …), locale (setlocale), signal (SIGINT …), assert, stddef (NULL), stdint, time.
Full lists in types.zn and other std/c/*.zn.
