ref: 556618eb07d1ac6e2c629a60acd53c45d53261be
dir: /sys/src/cmd/venti/srv/utils.c/
#include "stdinc.h" #include "dat.h" #include "fns.h" int namecmp(char *s, char *t) { return strncmp(s, t, ANameSize); } void namecp(char *dst, char *src) { strncpy(dst, src, ANameSize - 1); dst[ANameSize - 1] = '\0'; } int nameok(char *name) { char *t; int c; if(name == nil) return -1; for(t = name; c = *t; t++) if(t - name >= ANameSize || c < ' ' || c >= 0x7f) return -1; return 0; } int stru32int(char *s, u32int *r) { char *t; u32int n, nn, m; int c; m = TWID32 / 10; n = 0; for(t = s; ; t++){ c = *t; if(c < '0' || c > '9') break; if(n > m) return -1; nn = n * 10 + c - '0'; if(nn < n) return -1; n = nn; } *r = n; return s != t && *t == '\0'; } int stru64int(char *s, u64int *r) { char *t; u64int n, nn, m; int c; m = TWID64 / 10; n = 0; for(t = s; ; t++){ c = *t; if(c < '0' || c > '9') break; if(n > m) return -1; nn = n * 10 + c - '0'; if(nn < n) return -1; n = nn; } *r = n; return s != t && *t == '\0'; } int vttypevalid(int type) { return type < VtMaxType; } static char* logit(int severity, char *fmt, va_list args) { char *s; s = vsmprint(fmt, args); if(s == nil) return nil; if(severity != EOk){ if(argv0 == nil) fprint(2, "%T %s: err %d: %s\n", argv0, severity, s); else fprint(2, "%T err %d: %s\n", severity, s); } return s; } void seterr(int severity, char *fmt, ...) { char *s; va_list args; va_start(args, fmt); s = logit(severity, fmt, args); va_end(args); if(s == nil) werrstr("error setting error"); else{ werrstr("%s", s); free(s); } } void logerr(int severity, char *fmt, ...) { char *s; va_list args; va_start(args, fmt); s = logit(severity, fmt, args); va_end(args); free(s); } u32int now(void) { return time(nil); } /* * return floor(log2(v)) */ int u64log2(u64int v) { int i; for(i = 0; i < 64; i++) if((v >> i) <= 1) break; return i; } int vtproc(void (*fn)(void*), void *arg) { proccreate(fn, arg, 256*1024); return 0; } int ientryfmt(Fmt *fmt) { IEntry *ie; ie = va_arg(fmt->args, IEntry*); return fmtprint(fmt, "%V %22lld %3d %5d %3d", ie->score, ie->ia.addr, ie->ia.type, ie->ia.size, ie->ia.blocks); } void ventifmtinstall(void) { fmtinstall('F', vtfcallfmt); fmtinstall('H', encodefmt); fmtinstall('I', ientryfmt); fmtinstall('T', vttimefmt); fmtinstall('V', vtscorefmt); } uint msec(void) { return nsec()/1000000; } uint countbits(uint n) { n = (n&0x55555555)+((n>>1)&0x55555555); n = (n&0x33333333)+((n>>2)&0x33333333); n = (n&0x0F0F0F0F)+((n>>4)&0x0F0F0F0F); n = (n&0x00FF00FF)+((n>>8)&0x00FF00FF); n = (n&0x0000FFFF)+((n>>16)&0x0000FFFF); return n; }