137 lines
2.3 KiB
C
137 lines
2.3 KiB
C
|
/* prep - prepare file for statistics Author: Andy Tanenbaum */
|
||
|
|
|
||
|
|
#include <ctype.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
#define TROFF_CHAR '.' /* troff commands begin with this char */
|
||
|
|
#define EOL '\n' /* end of line char */
|
||
|
|
#define APOSTROPHE 047 /* single quote */
|
||
|
|
#define BACKSLASH '\\' /* troff code */
|
||
|
|
|
||
|
|
int lfread; /* set when last char read was lf */
|
||
|
|
int lfwritten = 1; /* set when last char written was lf */
|
||
|
|
|
||
|
|
_PROTOTYPE(int main, (int argc, char **argv));
|
||
|
|
_PROTOTYPE(void skipline, (void));
|
||
|
|
_PROTOTYPE(int backslash, (void));
|
||
|
|
_PROTOTYPE(void usage, (void));
|
||
|
|
|
||
|
|
int main(argc, argv)
|
||
|
|
int argc;
|
||
|
|
char *argv[];
|
||
|
|
{
|
||
|
|
|
||
|
|
int c;
|
||
|
|
|
||
|
|
if (argc > 2) usage();
|
||
|
|
if (argc == 2) {
|
||
|
|
if (freopen(argv[1], "r", stdin) == NULL) {
|
||
|
|
printf("prep: cannot open %s\n", argv[1]);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while ((c = getchar()) != EOF) {
|
||
|
|
/* Lines beginning with "." are troff commands -- skip them. */
|
||
|
|
if (lfread && c == TROFF_CHAR) {
|
||
|
|
skipline();
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
while (c == BACKSLASH) c = backslash(); /* eat troff stuff */
|
||
|
|
|
||
|
|
if (isupper(c)) {
|
||
|
|
putchar(tolower(c));
|
||
|
|
lfwritten = 0;
|
||
|
|
lfread = 0;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (islower(c)) {
|
||
|
|
putchar(c);
|
||
|
|
lfwritten = 0;
|
||
|
|
lfread = 0;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (c == APOSTROPHE) {
|
||
|
|
putchar(c);
|
||
|
|
lfwritten = 0;
|
||
|
|
lfread = 0;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
lfread = (c == EOL ? 1 : 0);
|
||
|
|
if (lfwritten) continue;
|
||
|
|
putchar(EOL);
|
||
|
|
lfwritten = 1;
|
||
|
|
}
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void skipline()
|
||
|
|
{
|
||
|
|
char c;
|
||
|
|
|
||
|
|
while ((c = getchar()) != EOL);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int backslash()
|
||
|
|
{
|
||
|
|
/* A backslash has been seen. Eat troff stuff. */
|
||
|
|
|
||
|
|
int c, c1, c2;
|
||
|
|
|
||
|
|
c = getchar();
|
||
|
|
switch (c) {
|
||
|
|
case 'f':
|
||
|
|
c = getchar();
|
||
|
|
c = getchar();
|
||
|
|
return(c);
|
||
|
|
|
||
|
|
case 's': /* \s7 or \s14 */
|
||
|
|
c = getchar();
|
||
|
|
c = getchar();
|
||
|
|
if (isdigit(c)) c = getchar();
|
||
|
|
return(c);
|
||
|
|
|
||
|
|
case 'n': /* \na or \n(xx */
|
||
|
|
c = getchar();
|
||
|
|
if (c == '(') {
|
||
|
|
c = getchar();
|
||
|
|
c = getchar();
|
||
|
|
}
|
||
|
|
c = getchar();
|
||
|
|
return(c);
|
||
|
|
|
||
|
|
case '*': /* / * (XX */
|
||
|
|
c = getchar();
|
||
|
|
if (c == '(') {
|
||
|
|
c = getchar();
|
||
|
|
c = getchar();
|
||
|
|
c = getchar();
|
||
|
|
return(c);
|
||
|
|
}
|
||
|
|
|
||
|
|
case '(': /* troff 4-character escape sequence */
|
||
|
|
c1 = getchar();
|
||
|
|
c2 = getchar();
|
||
|
|
if (c1 == 'e' && c2 == 'm') return(' ');
|
||
|
|
if (c1 == 'e' && c2 == 'n') return(' ');
|
||
|
|
c = getchar();
|
||
|
|
return(c);
|
||
|
|
|
||
|
|
case '%': /* soft hyphen: \% */
|
||
|
|
c = getchar();
|
||
|
|
return(c);
|
||
|
|
|
||
|
|
default:
|
||
|
|
return(c);
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void usage()
|
||
|
|
{
|
||
|
|
printf("Usage: prep [file]\n");
|
||
|
|
exit(1);
|
||
|
|
}
|