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https://github.com/jart/cosmopolitan.git
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f4f4caab0e
I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
112 lines
6 KiB
C
112 lines
6 KiB
C
#ifndef COSMOPOLITAN_LIBC_CONV_CONV_H_
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#define COSMOPOLITAN_LIBC_CONV_CONV_H_
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#include "libc/calls/struct/timespec.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/nt/struct/filetime.h"
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § conversion ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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/**
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* COBOL timestamp (1601) for UNIX epoch (1970).
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*
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* It's a well-known fact in the social sciences that the introduction
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* of the UNIX operation system signalled the end of modernity. Windows
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* timestamps are living proof.
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*/
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#define MODERNITYSECONDS 11644473600
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#define HECTONANOSECONDS 10000000
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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int abs(int) libcesque pureconst;
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long labs(long) libcesque pureconst;
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long long llabs(long long) libcesque pureconst;
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char *ltpcpy(char *, long) paramsnonnull() libcesque nocallback;
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int llog10(unsigned long) libcesque pureconst;
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int unsleb128(const void *, size_t, int64_t *);
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int atoi(const char *) paramsnonnull() libcesque nosideeffect;
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long atol(const char *) paramsnonnull() libcesque nosideeffect;
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long long atoll(const char *) paramsnonnull() libcesque nosideeffect;
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unsigned long strtoul(const char *, char **, int) paramsnonnull((1));
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long long strtoll(const char *, char **, int) paramsnonnull((1));
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unsigned long long strtoull(const char *, char **, int) paramsnonnull((1));
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long long strtonum(const char *, long long, long long, const char **);
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intmax_t div10(intmax_t, unsigned *) hidden;
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intmax_t strtoimax(const char *, char **, int) paramsnonnull((1));
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uintmax_t strtoumax(const char *, char **, int) paramsnonnull((1));
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intmax_t wcstoimax(const wchar_t *, wchar_t **, int);
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long wcstol(const wchar_t *, wchar_t **, int);
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long strtol(const char *, char **, int)
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paramsnonnull((1)) libcesque nosideeffect;
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § conversion » time ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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struct timespec filetimetotimespec(struct NtFileTime);
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struct NtFileTime timespectofiletime(struct timespec);
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struct NtFileTime timetofiletime(int64_t) nothrow pureconst;
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int64_t filetimetotime(struct NtFileTime) nothrow pureconst;
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void filetimetotimeval(struct timeval *, struct NtFileTime) nothrow;
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struct NtFileTime timevaltofiletime(const struct timeval *) nosideeffect;
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long convertmicros(const struct timeval *, long) paramsnonnull() nosideeffect;
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § conversion » manipulation ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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char *basename(const char *) nosideeffect;
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char *basename_n(const char *, size_t) nosideeffect;
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bool isabspath(const char *) paramsnonnull() nosideeffect;
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § conversion » computation ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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typedef struct {
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int quot;
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int rem;
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} div_t;
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typedef struct {
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long int quot;
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long int rem;
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} ldiv_t;
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typedef struct {
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long long int quot;
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long long int rem;
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} lldiv_t;
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typedef struct {
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intmax_t quot;
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intmax_t rem;
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} imaxdiv_t;
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div_t div(int, int) pureconst;
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ldiv_t ldiv(long, long) pureconst;
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lldiv_t lldiv(long long, long long) pureconst;
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imaxdiv_t imaxdiv(intmax_t, intmax_t) pureconst;
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double RoundDecimalPlaces(double, double, double(double));
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § conversion » optimizations ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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#if __STDC_VERSION__ + 0 >= 199901L
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#define div(num, den) ((div_t){(num) / (den), (num) % (den)})
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#define ldiv(num, den) ((ldiv_t){(num) / (den), (num) % (den)})
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#define lldiv(num, den) ((lldiv_t){(num) / (den), (num) % (den)})
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#endif
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#ifndef __STRICT_ANSI__
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intmax_t __imaxabs(intmax_t) asm("imaxabs") libcesque pureconst;
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#define imaxabs(x) __imaxabs(x)
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#endif /* !ANSI */
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_CONV_CONV_H_ */
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