ref: 1018d7a7091fd5e0433f501a3474cdc3fec322cc
dir: /lib9/convD2M.c/
#include "lib9.h" #include "fcall.h" uint sizeD2M(Dir *d) { char *sv[4]; int i, ns; sv[0] = d->name; sv[1] = d->uid; sv[2] = d->gid; sv[3] = d->muid; ns = 0; for(i = 0; i < 4; i++) if(sv[i]) ns += strlen(sv[i]); return STATFIXLEN + ns; } uint convD2M(Dir *d, uchar *buf, uint nbuf) { uchar *p, *ebuf; char *sv[4]; int i, ns, nsv[4], ss; if(nbuf < BIT16SZ) return 0; p = buf; ebuf = buf + nbuf; sv[0] = d->name; sv[1] = d->uid; sv[2] = d->gid; sv[3] = d->muid; ns = 0; for(i = 0; i < 4; i++){ if(sv[i]) nsv[i] = strlen(sv[i]); else nsv[i] = 0; ns += nsv[i]; } ss = STATFIXLEN + ns; /* set size befor erroring, so user can know how much is needed */ /* note that length excludes count field itself */ PBIT16(p, ss-BIT16SZ); p += BIT16SZ; if(ss > nbuf) return BIT16SZ; PBIT16(p, d->type); p += BIT16SZ; PBIT32(p, d->dev); p += BIT32SZ; PBIT8(p, d->qid.type); p += BIT8SZ; PBIT32(p, d->qid.vers); p += BIT32SZ; PBIT64(p, d->qid.path); p += BIT64SZ; PBIT32(p, d->mode); p += BIT32SZ; PBIT32(p, d->atime); p += BIT32SZ; PBIT32(p, d->mtime); p += BIT32SZ; PBIT64(p, d->length); p += BIT64SZ; for(i = 0; i < 4; i++){ ns = nsv[i]; if(p + ns + BIT16SZ > ebuf) return 0; PBIT16(p, ns); p += BIT16SZ; if(ns) memmove(p, sv[i], ns); p += ns; } if(ss != p - buf) return 0; return p - buf; }