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strcmpn changes to strncmp to confuse the innocent
[unix-history] / usr / src / usr.bin / pascal / pmerge / pmerge.c
/* Copyright (c) 1979 Regents of the University of California */
static char sccsid[] = "@(#)pmerge.c 1.4 %G%";
#include <ctype.h>
#include <stdio.h>
#include <signal.h>
#define PRGFILE 0
#define LABELFILE 1
#define CONSTFILE 2
#define TYPEFILE 3
#define VARFILE 4
#define RTNFILE 5
#define BODYFILE 6
#define NUMFILES 7
#define TRUE 1
#define FALSE 0
#define MAXINCL 9
#define MAXNAM 75
#define TMPNAME "/usr/tmp/MGXXXXXX"
FILE *files[NUMFILES];
char *names[NUMFILES];
FILE *curfile; /* current output file */
FILE *fopen();
char labelopen = FALSE, constopen = FALSE, typeopen = FALSE, varopen = FALSE;
char *mktemp();
char *malloc();
/*
* Remove temporary files if interrupted
*/
onintr()
{
int i;
for (i = 0; i < NUMFILES; i++)
if (files[i] != NULL)
unlink(names[i]);
}
/*
* Program to merge separately compiled pascal modules into a
* single standard Pascal program.
*/
main(argc, argv)
long argc;
char **argv;
{
FILE *incl[MAXINCL]; /* include stack */
long inclcnt = 0; /* incl index */
char *name[MAXNAM]; /* include names seen so far */
long namcnt = 0; /* next name ptr slot available */
char *nambuf; /* string table for names */
char line[BUFSIZ]; /* input line buffer */
char *next; /* next name space available */
FILE *input = stdin; /* current input file */
long ac = 0; /* argv index */
char **cpp, *cp, *fp;/* char ptrs */
char quote; /* include quote character */
int i; /* index var */
for (i = 0; i < MAXNAM ; i++)
name[i] = 0;
signal(SIGINT, onintr);
curfile = files[PRGFILE] = fopen(names[PRGFILE] = mktemp(TMPNAME), "w");
files[LABELFILE] = fopen(names[LABELFILE] = mktemp(TMPNAME), "w");
files[CONSTFILE] = fopen(names[CONSTFILE] = mktemp(TMPNAME), "w");
files[TYPEFILE] = fopen(names[TYPEFILE] = mktemp(TMPNAME), "w");
files[VARFILE] = fopen(names[VARFILE] = mktemp(TMPNAME), "w");
files[RTNFILE] = fopen(names[RTNFILE] = mktemp(TMPNAME), "w");
files[BODYFILE] = fopen(names[BODYFILE] = mktemp(TMPNAME), "w");
for (i = 0; i < NUMFILES; i++)
if (files[i] == NULL)
quit(names[i]);
if ((nambuf = malloc(BUFSIZ)) == NULL) {
fputs("no space for string table\n", stderr);
quit(NULL);
}
next = nambuf;
name[namcnt] = next;
for(;;) {
if (inclcnt > 0) {
inclcnt--;
fclose(input);
input = incl[inclcnt];
} else if (++ac < argc) {
input = freopen(argv[ac], "r", input);
if (input == NULL)
quit(argv[ac]);
} else {
printout();
onintr();
exit(0);
}
fgets(line, BUFSIZ, input);
while (!feof(input)) {
if (line[0] != '#') {
split(line);
fgets(line, BUFSIZ, input);
continue;
}
for (cp = &line[1]; isspace(*cp); cp++)
/* void */;
if (strncmp("include", cp, 7))
goto bad;
for (cp += 7; isspace(*cp); cp++)
/* void */;
if (*cp != '\'' && *cp != '"')
goto bad;
if (&nambuf[BUFSIZ] < next + strlen(cp)) {
if ((nambuf = malloc(BUFSIZ)) == NULL) {
fputs("no space for string table\n",
stderr);
quit(NULL);
}
next = nambuf;
name[namcnt] = next;
}
for (fp = next, quote = *cp++;
*cp != '\0' && *cp != quote; )
*fp++ = *cp++;
if (*cp != quote &&
(fp[-1] != 'i' || fp[-1] != 'h') &&
(fp[-2] != '.'))
goto bad;
*fp++ = '\0';
for (cpp = name; *cpp < next && strcmp(*cpp, next); )
cpp++;
if (*cpp == next) {
if (inclcnt == MAXINCL) {
fputs("include table overflow\n",
stderr);
quit(NULL);
}
if (++namcnt == MAXNAM) {
fputs("include name table overflow\n",
stderr);
quit(NULL);
}
incl[inclcnt] = input;
inclcnt++;
input = fopen(next, "r");
if (input == NULL)
quit(next);
next = fp;
name[namcnt] = next;
}
fgets(line, BUFSIZ, input);
}
}
bad:
fputs("bad include format:", stderr);
fputs(line, stderr);
quit(NULL);
}
/*
* Split up output into the approprite files
*/
char incom = FALSE; /* TRUE => in comment */
char incur = FALSE; /* TRUE => in (* *) style comment */
char inbrac = FALSE; /* TRUE => in { } style comment */
char instr = FALSE; /* TRUE => in quoted string */
char inprog = FALSE; /* TRUE => program statement has been found */
int beginnest = 0; /* routine nesting level */
int nest = 0; /* begin block nesting level */
int paren_level = 0; /* nesting level of parentheses */
split(line)
char *line;
{
char ch1, *cp; /* input window */
char *word; /* ptr to current word */
int len; /* length of current word */
char prt = TRUE; /* TRUE => print current word */
ch1 = ' ';
cp = line;
while (*cp) {
switch(*cp) {
case '(':
if (incom)
break;
if (*(cp+1) == '*') {
fputc(*cp, curfile);
cp++;
incom = TRUE;
incur = TRUE;
} else {
paren_level++;
}
break;
case ')':
if (incur && ch1 == '*') {
incom = FALSE;
incur = FALSE;
} else if (!incom) {
paren_level--;
}
break;
case '{':
if (!incom) {
inbrac = TRUE;
incom = TRUE;
}
break;
case '}':
if (inbrac) {
inbrac = FALSE;
incom = FALSE;
}
break;
case '\'':
if (!incom) {
incom = TRUE;
instr = TRUE;
} else if (instr) {
incom = FALSE;
instr = FALSE;
}
break;
}
if (incom || !isalpha(*cp)) {
fputc(*cp, curfile);
ch1 = *cp++;
continue;
}
word = cp;
while (isalnum(*cp))
cp++;
len = cp - word;
switch (*word) {
case 'b':
if (len == 5 && !strncmp(word, "begin", 5)) {
if (nest == 0 && beginnest == 0) {
if (inprog != 1) {
fprintf(stderr,
"improper program body");
quit(NULL);
}
curfile = files[BODYFILE];
} else {
beginnest++;
}
}
break;
case 'c':
if (len == 4 && !strncmp(word, "case", 4)) {
if (beginnest > 0) {
beginnest++;
}
break;
}
if (len == 5 && !strncmp(word, "const", 5)) {
if (nest == 0) {
prt = FALSE;
if (!constopen) {
constopen = TRUE;
prt = TRUE;
}
curfile = files[CONSTFILE];
}
}
break;
case 'e':
if (len == 3 && !strncmp(word, "end", 3)) {
if (beginnest == 1) {
nest--;
}
if (beginnest > 0) {
beginnest--;
}
if (nest < 0) {
if (inprog == 1) {
inprog = 0;
nest = 0;
} else {
fprintf(stderr, "too many end statements");
quit(NULL);
}
}
break;
}
if (len == 8 && !strncmp(word, "external", 8)) {
fputs("forward", curfile);
prt = FALSE;
if (paren_level == 0) {
nest--;
}
}
break;
case 'f':
if (len == 8 && !strncmp(word, "function", 8)) {
if (nest == 0) {
curfile = files[RTNFILE];
}
if (paren_level == 0) {
nest++;
}
break;
}
if (len == 7 && !strncmp(word, "forward", 7)) {
if (paren_level == 0) {
nest--;
}
}
break;
case 'l':
if (len == 5 && !strncmp(word, "label", 5)) {
if (nest == 0) {
prt = FALSE;
if (!labelopen) {
labelopen = TRUE;
prt = TRUE;
}
curfile = files[LABELFILE];
}
}
break;
case 'p':
if (len == 9 && !strncmp(word, "procedure", 9)) {
if (nest == 0) {
curfile = files[RTNFILE];
}
if (paren_level == 0) {
nest++;
}
break;
}
if (len == 7 && !strncmp(word, "program", 7)) {
if (nest != 0) {
fprintf(stderr, "improper program nesting");
quit(NULL);
}
inprog = 1;
curfile = files[PRGFILE];
}
break;
case 't':
if (len == 4 && !strncmp(word, "type", 4)) {
if (nest == 0) {
prt = FALSE;
if (!typeopen) {
typeopen = TRUE;
prt = TRUE;
}
curfile = files[TYPEFILE];
}
}
break;
case 'v':
if (len == 3 && !strncmp(word, "var", 3)) {
if (nest == 0) {
prt = FALSE;
if (!varopen) {
varopen = TRUE;
prt = TRUE;
}
curfile = files[VARFILE];
}
}
break;
}
if (prt)
fprintf(curfile, "%.*s", len, word);
prt = TRUE;
ch1 = ' ';
}
}
/*
* Print out the merged result
*/
printout()
{
FILE *fp;
int i;
char ch;
for(i = 0; i < NUMFILES; i++) {
fp = freopen(names[i], "r", files[i]);
if (fp == NULL)
quit(names[i]);
ch = getc(fp);
while (!feof(fp)) {
putc(ch,stdout);
ch = getc(fp);
}
}
}
/*
* Die gracefully
*/
quit(fp)
char *fp;
{
if (fp != NULL)
perror(fp);
onintr();
exit(1);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.