1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 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 * Glenn Fowler 25 * AT&T Bell Laboratories 26 * 27 * string vector argv insertion 28 */ 29 30 #include <ast.h> 31 #include <vecargs.h> 32 #include <ctype.h> 33 34 /* 35 * insert the string vector vec between 36 * (*argvp)[0] and (*argvp)[1], sliding (*argvp)[1] ... over 37 * null and blank args are deleted 38 * 39 * vecfree always called 40 * 41 * -1 returned if insertion failed 42 */ 43 44 int 45 vecargs(register char** vec, int* argcp, char*** argvp) 46 { 47 register char** argv; 48 register char** oargv; 49 char** ovec; 50 char* s; 51 int num; 52 53 if (!vec) return(-1); 54 if ((num = (char**)(*(vec - 1)) - vec) > 0) 55 { 56 if (!(argv = newof(0, char*, num + *argcp + 1, 0))) 57 { 58 vecfree(vec, 0); 59 return(-1); 60 } 61 oargv = *argvp; 62 *argvp = argv; 63 *argv++ = *oargv++; 64 ovec = vec; 65 while (s = *argv = *vec++) 66 { 67 while (isspace(*s)) s++; 68 if (*s) argv++; 69 } 70 vecfree(ovec, 1); 71 while (*argv = *oargv++) argv++; 72 *argcp = argv - *argvp; 73 } 74 else vecfree(vec, 0); 75 return(0); 76 } 77