dcn@ihuxl.UUCP (Dave Newkirk) (11/12/83)
/* entab - replace blanks with tabs */
#include "stdio.h"
#define INTERVAL 4
#define SQUOTE 0x27
#define DQUOTE 0x22
main(argc, argv)
int argc ;
char *argv[] ;
{
FILE *input ;
argc-- ; argv++ ;
if( argc == 0 )
entab( stdin ) ;
else
for( ; argc>0 ; argc--,argv++)
if( (input=fopen(*argv,"r")) == NULL ) {
fprintf(stderr, "entab: can't open %s\n", *argv) ;
exit(1) ;
}
else {
entab( input ) ;
fclose( input ) ;
}
exit(0) ;
} /* end main */
/* entab - replace blanks with tabs */
entab( in )
FILE *in ;
{
int c, i, nextcol, nb, nt, sqstring, dqstring ;
nextcol = nb = nt = 0 ;
sqstring = dqstring = FALSE ;
while( (c=agetc(in)) != EOF ) {
nextcol++ ;
if( c==BLANK && !sqstring && !dqstring ) {
nb++ ;
if( nextcol % INTERVAL == 0 && nb > 1 ) {
nt++ ;
nb = 0 ;
}
}
else if( c == NL ) {
aputc( NL, stdout ) ;
nextcol = nb = nt = 0 ;
sqstring = dqstring = FALSE ;
}
else {
for( i=1 ; i <= nt ; i++ )
aputc( TAB, stdout ) ;
for( i=1 ; i <= nb ; i++ )
aputc( BLANK, stdout ) ;
nb = nt = 0 ;
aputc( c, stdout ) ;
if( c == SQUOTE )
sqstring = 1 - sqstring ;
else if( c == DQUOTE )
dqstring = 1 - dqstring ;
}
} /* end while */
} /* end entab */