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12345678910111213141516171819202122232425262728293031323334353637383940414243444546//// puts.cpp//// Copyright (c) Microsoft Corporation. All rights reserved.//// Defines puts(), which writes a string to stdout.//#include <corecrt_internal_stdio.h>#include <corecrt_internal_ptd_propagation.h>
// Writes a string to stdout. Does not write the string's null terminator, but// _does_ append a newline to the output. Return 0 on success; EOF on failure.static int __cdecl _puts_internal(char const* const string, __crt_cached_ptd_host& ptd){ _UCRT_VALIDATE_RETURN(ptd, string != nullptr, EINVAL, EOF);
FILE* const stream = stdout; _UCRT_VALIDATE_STREAM_ANSI_RETURN(ptd, stream, EINVAL, EOF);
size_t const length = strlen(string);
return __acrt_lock_stream_and_call(stream, [&]() -> int { __acrt_stdio_temporary_buffering_guard const buffering(stream, ptd);
size_t const bytes_written = _fwrite_nolock_internal(string, 1, length, stream, ptd);
// If we failed to write the entire string, or if we fail to write the // newline, reset the buffering and return failure: if (bytes_written != length || _fputc_nolock_internal('\n', stream, ptd) == EOF) { return EOF; }
return 0; });}
extern "C" int __cdecl puts(char const* const string){ __crt_cached_ptd_host ptd; return _puts_internal(string, ptd);}