1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <strstream> 11 12 // class strstreambuf 13 14 // strstreambuf(char* gnext_arg, streamsize n, char* pbeg_arg = 0); 15 16 #include <strstream> 17 #include <cassert> 18 19 int main() 20 { 21 { 22 char buf[] = "abcd"; 23 std::strstreambuf sb(buf, sizeof(buf)); 24 assert(sb.sgetc() == 'a'); 25 assert(sb.snextc() == 'b'); 26 assert(sb.snextc() == 'c'); 27 assert(sb.snextc() == 'd'); 28 assert(sb.snextc() == 0); 29 assert(sb.snextc() == EOF); 30 } 31 { 32 char buf[] = "abcd"; 33 std::strstreambuf sb(buf, 0); 34 assert(sb.sgetc() == 'a'); 35 assert(sb.snextc() == 'b'); 36 assert(sb.snextc() == 'c'); 37 assert(sb.snextc() == 'd'); 38 assert(sb.snextc() == EOF); 39 } 40 { 41 char buf[] = "abcd"; 42 std::strstreambuf sb(buf, sizeof(buf), buf); 43 assert(sb.sgetc() == EOF); 44 assert(sb.sputc('e') == 'e'); 45 assert(sb.sputc('f') == 'f'); 46 assert(sb.sputc('g') == 'g'); 47 assert(sb.sputc('h') == 'h'); 48 assert(sb.sputc('i') == 'i'); 49 assert(sb.sputc('j') == EOF); 50 assert(sb.sgetc() == 'e'); 51 assert(sb.snextc() == 'f'); 52 assert(sb.snextc() == 'g'); 53 assert(sb.snextc() == 'h'); 54 assert(sb.snextc() == 'i'); 55 assert(sb.snextc() == EOF); 56 } 57 { 58 char buf[] = "abcd"; 59 std::strstreambuf sb(buf, 0, buf); 60 assert(sb.sgetc() == EOF); 61 assert(sb.sputc('e') == 'e'); 62 assert(sb.sputc('f') == 'f'); 63 assert(sb.sputc('g') == 'g'); 64 assert(sb.sputc('h') == 'h'); 65 assert(sb.sputc('i') == EOF); 66 assert(sb.sgetc() == 'e'); 67 assert(sb.snextc() == 'f'); 68 assert(sb.snextc() == 'g'); 69 assert(sb.snextc() == 'h'); 70 assert(sb.snextc() == EOF); 71 } 72 { 73 char buf[10] = "abcd"; 74 int s = std::strlen(buf); 75 std::strstreambuf sb(buf, sizeof(buf)-s, buf + s); 76 assert(sb.sgetc() == 'a'); 77 assert(sb.snextc() == 'b'); 78 assert(sb.snextc() == 'c'); 79 assert(sb.snextc() == 'd'); 80 assert(sb.snextc() == EOF); 81 assert(sb.sputc('e') == 'e'); 82 assert(sb.sputc('f') == 'f'); 83 assert(sb.sputc('g') == 'g'); 84 assert(sb.sputc('h') == 'h'); 85 assert(sb.sputc('i') == 'i'); 86 assert(sb.sputc('j') == 'j'); 87 assert(sb.sputc('j') == EOF); 88 assert(sb.sgetc() == 'e'); 89 assert(sb.snextc() == 'f'); 90 assert(sb.snextc() == 'g'); 91 assert(sb.snextc() == 'h'); 92 assert(sb.snextc() == 'i'); 93 assert(sb.snextc() == 'j'); 94 assert(sb.snextc() == EOF); 95 } 96 } 97
