142 lines
1.8 KiB
C
142 lines
1.8 KiB
C
#ifndef lint
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static char sccsid[] = "@(#)input.c 1.1 94/10/31 SMI";
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#endif
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/*
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* adb - input routines
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*/
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#include "adb.h"
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#include <stdio.h>
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char line[BUFSIZ];
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int infile;
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int eof;
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char lastc = '\n';
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eol(c)
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char c;
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{
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return (c == '\n' || c == ';');
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}
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rdc()
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{
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do
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(void) readchar();
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while (lastc == ' ' || lastc == '\t');
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return (lastc);
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}
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readchar()
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{
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if (eof) {
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lastc = 0;
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return (0);
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}
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if (lp == 0) {
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lp = line;
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do {
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eof = read(infile, lp, 1) <= 0;
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if (interrupted)
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error((char *)0);
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} while (eof == 0 && *lp++ != '\n');
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*lp = 0;
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lp = line;
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}
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if (lastc = nextc)
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nextc = 0;
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else
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if (lastc = *lp)
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lp++;
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return (lastc);
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}
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nextchar()
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{
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if (eol(rdc())) {
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lp--;
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return (0);
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}
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return (lastc);
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}
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quotchar()
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{
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if (readchar() == '\\')
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return (readchar());
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if (lastc=='\'')
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return (0);
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return (lastc);
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}
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getformat(deformat)
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char *deformat;
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{
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register char *fptr = deformat;
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register int quote = 0;
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while (quote ? readchar() != '\n' : !eol(readchar()))
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if ((*fptr++ = lastc)=='"')
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quote = ~quote;
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lp--;
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if (fptr != deformat)
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*fptr++ = '\0';
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}
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#define MAXIFD 5
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struct {
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int fd;
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int r9;
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} istack[MAXIFD];
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int ifiledepth;
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iclose(stack, err)
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int stack, err;
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{
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if (err) {
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if (infile) {
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(void) close(infile);
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infile = 0;
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}
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while (--ifiledepth >= 0)
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if (istack[ifiledepth].fd)
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(void) close(istack[ifiledepth].fd);
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ifiledepth = 0;
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return;
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}
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switch (stack) {
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case 0:
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if (infile) {
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(void) close(infile);
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infile = 0;
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}
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break;
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case 1:
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if (ifiledepth >= MAXIFD)
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error("$<< nesting too deep");
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istack[ifiledepth].fd = infile;
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istack[ifiledepth].r9 = var[9];
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ifiledepth++;
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infile = 0;
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break;
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case -1:
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if (infile) {
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(void) close(infile);
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infile = 0;
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}
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if (ifiledepth > 0) {
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infile = istack[--ifiledepth].fd;
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var[9] = istack[ifiledepth].r9;
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}
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}
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}
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