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/* An Alef program to parse numbers out of * the string returned from /dev/time, and * print them from a separate proc. This is * a rather lame conglomeration of several * examples from Bob Flandrea's Alef * User's Guide */ tuple(int, uint, byte*) strtoui(byte* str, int base) { int val; while(*str != 0 && whitespace(*str)) str ; if(str == nil || *str == 0) return(0, 0, str); while(*str && !whitespace(*str)) { if(!validdigit(*str, base)) return (-1, val, str 1); /* extract digit into val */ str ; } return(1, val, str); } void receive(chan(uint) c) { int s; s = <-c; print("%d\n", s); if (s == 0) terminate(nil); } void main(void) { chan(uint) c; alloc c; proc receive(c); int ret; uint val; int fd; byte *p, buf[128], *newp; fd = open("/dev/time", OREAD|OCEXEC); if (fd >= 0) { read(fd, buf, sizeof(buf)); for(p = buf; *p; p = newp) { (ret, val, newp) = strtoui(p, 10); if(ret >= 0) c <-= val; if(ret == 0) break; } } }
Descriptions in this dictionary are ©1997-99 Neal Ziring. Some examples copyright of their respective authors. Some technologies and languages are trademarked. Permission to copy descriptions is granted as long as authorship credit is preserved.
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Dictionary and script maintained by Neal Ziring, last major modifications 3/18/98. Most recent additions to dictionary and master list, 1/00.