7  - split - divide a string into fields, like awk split()
8  == int split(char *string, char *fields[], int nfields, char *sep);
9  - fields: list is not NULL-terminated
10  - nfields: number of entries available in fields[]
13 int				/* number of fields, including overflow */
14 split(char *string, char *fields[], int nfields, char *sep)  in split()  argument
21 	char **fp = fields;  in split()
54 		/* we have overflowed the fields vector -- just count them */  in split()
84 		/* we have overflowed the fields vector -- just count them */  in split()
157 	char *fields[MNF];  in main()  local
166 			(void) split(buf, fields, MNF, argv[2]);  in main()
185 	char *fields[NF];  in dosplit()  local
188 	nf = split(string, fields, NF, seps);  in dosplit()
189 	print(nf, NF, fields);  in dosplit()
193 print(int nf, int nfp, char *fields[])  in print()  argument
201 		printf("\"%s\"%s", fields[fn], (fn+1 < nf) ? ", " : "\n");  in print()
278 	char *fields[RNF+1];  in regress()  local
286 		fields[RNF] = NULL;  in regress()
287 		nf = split(buf, fields, RNF, tests[n].seps);  in regress()
290 			printf("split `%s' by `%s' gave %d fields, not %d\n",  in regress()
293 		} else if (fields[RNF] != NULL) {  in regress()
298 				f = fields[i];  in regress()
304 						i, fields[i], tests[n].fi[i]);  in regress()
310 			print(nf, RNF, fields);  in regress()