ref: fdf020f1309bffde33554f5a13c7b3a1a3fb1891
dir: /sys/src/libc/9sys/convM2D.c/
#include <u.h> #include <libc.h> #include <fcall.h> int statcheck(uchar *buf, uint nbuf) { uchar *ebuf; int i; ebuf = buf + nbuf; if(nbuf < STATFIXLEN || nbuf != BIT16SZ + GBIT16(buf)) return -1; buf += STATFIXLEN - 4 * BIT16SZ; for(i = 0; i < 4; i++){ if(buf + BIT16SZ > ebuf) return -1; buf += BIT16SZ + GBIT16(buf); } if(buf != ebuf) return -1; return 0; } static char nullstring[] = ""; uint convM2D(uchar *buf, uint nbuf, Dir *d, char *strs) { uchar *p, *ebuf; char *sv[4]; int i, ns; if(nbuf < STATFIXLEN) return 0; p = buf; ebuf = buf + nbuf; p += BIT16SZ; /* ignore size */ d->type = GBIT16(p); p += BIT16SZ; d->dev = GBIT32(p); p += BIT32SZ; d->qid.type = GBIT8(p); p += BIT8SZ; d->qid.vers = GBIT32(p); p += BIT32SZ; d->qid.path = GBIT64(p); p += BIT64SZ; d->mode = GBIT32(p); p += BIT32SZ; d->atime = GBIT32(p); p += BIT32SZ; d->mtime = GBIT32(p); p += BIT32SZ; d->length = GBIT64(p); p += BIT64SZ; for(i = 0; i < 4; i++){ if(p + BIT16SZ > ebuf) return 0; ns = GBIT16(p); p += BIT16SZ; if(p + ns > ebuf) return 0; if(strs){ sv[i] = strs; memmove(strs, p, ns); strs += ns; *strs++ = '\0'; } p += ns; } if(strs){ d->name = sv[0]; d->uid = sv[1]; d->gid = sv[2]; d->muid = sv[3]; }else{ d->name = nullstring; d->uid = nullstring; d->gid = nullstring; d->muid = nullstring; } return p - buf; }