1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2011 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Eclipse Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.eclipse.org/org/documents/epl-v10.html * 11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 #pragma prototyped 23 /* 24 * standalone mini ast+sfio implementation 25 */ 26 27 #include <ast.h> 28 29 #define CHUNK 1024 30 31 _Ast_info_t ast; 32 33 int 34 astwinsize(int fd, int* lines, int* columns) 35 { 36 if (lines) 37 *lines = 24; 38 if (columns) 39 *columns = 80; 40 return 0; 41 } 42 43 char* 44 sfgetr(Sfio_t* sp, int c, int z) 45 { 46 register char* s; 47 register char* e; 48 49 static char* buf; 50 static unsigned long siz; 51 52 if (!buf) 53 { 54 siz = CHUNK; 55 if (!(buf = newof(0, char, siz, 0))) 56 return 0; 57 } 58 if (z < 0) 59 return *buf ? buf : (char*)0; 60 s = buf; 61 e = s + siz; 62 for (;;) 63 { 64 if (s >= e) 65 { 66 siz += CHUNK; 67 if (!(buf = newof(buf, char, siz, 0))) 68 return 0; 69 s = buf + (siz - CHUNK); 70 e = s + siz; 71 } 72 if ((c = sfgetc(sp)) == EOF) 73 { 74 *s = 0; 75 return 0; 76 } 77 if (c == '\n') 78 { 79 *s = z ? 0 : c; 80 break; 81 } 82 *s++ = c; 83 } 84 return buf; 85 } 86