1 /* $OpenBSD: varname.c,v 1.5 2010/07/19 19:46:44 espie Exp $ */ 2 /* 3 * Copyright (c) 2001 Marc Espie. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS 15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD 18 * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <stdlib.h> 28 #include "config.h" 29 #include "defines.h" 30 #include "var.h" 31 #include "buf.h" 32 #include "varname.h" 33 34 const char * 35 VarName_Get(const char *start, struct Name *name, SymTable *ctxt, bool err, const char *(*cont)(const char *)) 36 { 37 const char *p; 38 size_t len; 39 40 p = cont(start); 41 /* If we don't want recursive variables, we skip over '$' */ 42 if (!FEATURES(FEATURE_RECVARS)) { 43 while (*p == '$') 44 p = cont(p); 45 } 46 if (*p != '$') { 47 name->s = start; 48 name->e = p; 49 name->tofree = false; 50 return p; 51 } else { 52 BUFFER buf; 53 Buf_Init(&buf, MAKE_BSIZE); 54 for (;;) { 55 Buf_Addi(&buf, start, p); 56 if (*p != '$') { 57 name->s = (const char *)Buf_Retrieve(&buf); 58 name->e = name->s + Buf_Size(&buf); 59 name->tofree = true; 60 return p; 61 } 62 start = p; 63 Var_ParseBuffer(&buf, start, ctxt, err, &len); 64 start += len; 65 p = cont(start); 66 } 67 } 68 } 69 70 void 71 VarName_Free(struct Name *name) 72 { 73 if (name->tofree) 74 free((char *)name->s); 75 } 76 77