1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1985-2010 AT&T Intellectual Property *
5 * and is licensed under the *
6 * Common Public License, Version 1.0 *
7 * by AT&T Intellectual Property *
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 #include "stdhdr.h"
25
26 ssize_t
getdelim(char ** sp,size_t * np,int delim,Sfio_t * f)27 getdelim(char** sp, size_t* np, int delim, Sfio_t* f)
28 {
29 ssize_t m;
30 ssize_t n;
31 ssize_t k;
32 ssize_t p;
33 uchar* s;
34 uchar* ps;
35 SFMTXDECL(f);
36
37 STDIO_INT(f, "getdelim", ssize_t, (char**, size_t*, int, Sfio_t*), (sp, np, delim, f))
38
39 SFMTXENTER(f, -1);
40
41 if(delim < 0 || delim > 255 || !sp || !np) /* bad parameters */
42 SFMTXRETURN(f, -1);
43
44 if(f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0)
45 SFMTXRETURN(f, -1);
46
47 SFLOCK(f,0);
48
49 if(!(s = (uchar*)(*sp)) || (n = *np) < 0)
50 { s = NIL(uchar*); n = 0; }
51 for(m = 0;; )
52 { /* read new data */
53 if((p = f->endb - (ps = f->next)) <= 0 )
54 { f->getr = delim;
55 f->mode |= SF_RC;
56 if(SFRPEEK(f,ps,p) <= 0)
57 { m = -1;
58 break;
59 }
60 }
61
62 for(k = 0; k < p; ++k) /* find the delimiter */
63 { if(ps[k] == delim)
64 { k += 1; /* include delim in copying */
65 break;
66 }
67 }
68
69 if((m+k+1) >= n ) /* make sure there is space */
70 { n = ((m+k+15)/8)*8;
71 if(!(s = (uchar*)realloc(s, n)) )
72 { *sp = 0; *np = 0;
73 m = -1;
74 break;
75 }
76 *sp = (char*)s; *np = n;
77 }
78
79 memcpy(s+m, ps, k); m += k;
80 f->next = ps+k; /* skip copied data in buffer */
81
82 if(s[m-1] == delim)
83 { s[m] = 0; /* 0-terminated */
84 break;
85 }
86 }
87
88 SFOPEN(f,0);
89 SFMTXRETURN(f,m);
90 }
91
92 ssize_t
__getdelim(char ** sp,size_t * np,int delim,Sfio_t * f)93 __getdelim(char** sp, size_t* np, int delim, Sfio_t* f)
94 {
95 return getdelim(sp, np, delim, f);
96 }
97