b64f8b07c1
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119395 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
2.6 KiB
C++
58 lines
2.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <strstream>
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// class strstreambuf
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// pos_type seekoff(off_type off, ios_base::seekdir way,
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// ios_base::openmode which = ios_base::in | ios_base::out);
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#include <strstream>
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#include <cassert>
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int main()
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{
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{
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char buf[] = "0123456789";
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std::strstreambuf sb(buf, 0);
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assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
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assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
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assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
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assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
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assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
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assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
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assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
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assert(sb.sgetc() == '3');
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assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
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assert(sb.sgetc() == '6');
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assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
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assert(sb.sgetc() == '7');
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}
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{
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char buf[] = "0123456789";
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std::strstreambuf sb(buf, 0, buf);
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assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
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assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
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assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
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assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == 3);
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assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
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assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == 7);
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assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
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assert(sb.sputc('a') == 'a');
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assert(sb.str() == std::string("012a456789"));
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assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
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assert(sb.sputc('b') == 'b');
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assert(sb.str() == std::string("012a456b89"));
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assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
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assert(sb.sputc('c') == 'c');
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assert(sb.str() == std::string("012a456c89"));
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}
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}
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