minix/commands/awk/r.c
2005-04-21 14:53:53 +00:00

627 lines
10 KiB
C
Executable file

/*
* a small awk clone
*
* (C) 1989 Saeko Hirabauashi & Kouichi Hirabayashi
*
* Absolutely no warranty. Use this software with your own risk.
*
* Permission to use, copy, modify and distribute this software for any
* purpose and without fee is hereby granted, provided that the above
* copyright and disclaimer notice.
*
* This program was written to fit into 64K+64K memory of the Minix 1.2.
*/
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef DOS
#include <process.h>
#endif
#include "awk.h"
#include "regexp.h"
#define MAXFLD 100
extern char **FS, **RS, **OFS, **ORS, **FILENAME;
extern double *NF, *NR;
extern double *FNR;
extern double *ARGC;
extern SYMBOL *argtab[];
extern CELL *getvar();
char *strsave(), *strcpy(), *getsval(), *jStrchr(), *strchr();
double getfval(), atof();
CELL *mkcell(), *mktmp(), *execute(), *patexec();
FILE *efopen();
extern CELL truecell, falsecell;
extern int pateval;
int infileno = 1;
FILE *ifp;
char record[BUFSIZ];
CELL *field[MAXFLD];
char *fs_str;
regexp *fs_pat;
CELL *
Getline(p) NODE *p;
{
CELL *u;
char *fnam, *s, str[BUFSIZ];
int i;
FILE *fp, *getfp();
if ((int) p->n_arg[0]) /* read into var */
s = str;
else
s = NULL;
if ((int) p->n_arg[1]) { /* file name */
u = execute(p->n_arg[1]);
fnam = getsval(u);
fp = getfp(fnam, (int) p->n_arg[2]);
c_free(u);
i = get1rec(s, fp);
}
else
i = Getrec(s);
if (s == str) {
u = execute(p->n_arg[0]);
setsval(u, str);
}
return mktmp(NUM, NULL, (double) i);
}
static
get1rec(buf, fp) char *buf; FILE *fp;
{
register int c;
register char rs, *s;
int mflg;
if (buf == NULL)
buf = record;
if ((rs = **RS) == '\0') { /* multi line record */
mflg = 1;
rs = '\n';
}
else
mflg = 0;
if (feof(fp) || (c = getc(fp)) == EOF)
return 0;
for (s = buf; ; ) {
for ( ; c != rs && c != EOF; c = getc(fp)) {
if (isKanji(c)) {
*s++ = c; c = getc(fp);
}
*s++ = c;
}
if (mflg) {
if ((c = getc(fp)) == '\n' || c == EOF)
break;
*s++ = '\n';
}
else
break;
}
*s = '\0';
#if 1
if (buf == record) {
#else
if (buf == record && c != EOF) {
#endif
mkfld(record, *FS, field);
(*NR)++;
(*FNR)++;
}
return s > buf || c != EOF ? 1 : 0;
}
Getrec(s) char *s;
{
CELL *u;
char *file, str[8];
while (ifp == stdin || infileno < (int)*ARGC) {
if (ifp == NULL) {
*FNR = 0.0;
if (infileno == (int)*ARGC)
break;
sprintf(str, "%d", infileno);
u = getvar(str, argtab);
file = getsval(u);
if (strchr(file, '=') != NULL) {
setvar(file);
infileno++;
continue;
}
else if (strcmp(file, "") == 0) {
/*
if (infileno == (int)*ARGC - 1)
ifp = stdin;
*/
infileno++;
continue;
}
else {
if (strcmp(file, "-") == 0)
ifp = stdin;
else
ifp = efopen(file, "r");
*FILENAME = file;
}
}
if (get1rec(s, ifp))
return 1;
else {
if (ifp != stdin)
fclose(ifp);
ifp = NULL;
infileno++;
}
}
ifp = stdin; /* for further "getline" */
*FILENAME = "-";
return 0; /* EOF */
}
mkfld(rec, sep, fld) char *rec, *sep; CELL *fld[];
{
char *s, *t;
char str[BUFSIZ];
int i, j, n;
int skip = 0;
if (strlen(sep) > 1)
return r_mkfld(rec, sep, fld);
if (*sep == ' ' || *sep == '\0') {
sep = " \t\n"; skip++;
}
for (i = 1, n = (int) *NF; i <= n; i++) {
sfree(fld[i]->c_sval);
sfree(fld[i]);
fld[i] = NULL;
}
for (i = 0, s = rec; ; ) {
t = str;
if (skip) {
while (*s && strchr(" \t\n", *s))
s++;
if (*s == '\0')
break;
}
while (*s && !jStrchr(sep, *s)) {
if (isKanji(*s))
*t++ = *s++;
*t++ = *s++;
}
*t = '\0';
if (isnum(str))
fld[++i] = mkcell(FLD|STR|NUM, str, atof(str));
else
fld[++i] = mkcell(FLD|STR, str, 0.0);
if (*s)
s++;
else
break;
}
*NF = (double) i;
return i;
}
static
r_mkfld(rec, sep, fld) char *rec, *sep; CELL *fld[];
{
char *s, *t;
char str[BUFSIZ];
int i, n;
regexp *mkpat();
extern int r_start, r_length;
if (strcmp(*FS, fs_str) != 0) {
sfree(fs_str); sfree(fs_pat);
fs_str = strsave(*FS);
fs_pat = mkpat(fs_str);
}
for (i = 1, n = (int) *NF; i <= n; i++) {
sfree(fld[i]->c_sval);
sfree(fld[i]);
fld[i] = NULL;
}
for (i = 0, s = rec, t = str; *s; ) {
if (match(fs_pat, s)) {
for (n = r_start; --n > 0; )
*t++ = *s++;
}
else {
while (*s)
*t++ = *s++;
}
*t = '\0';
t = str;
fld[++i] = mkcell(FLD|STR, str, 0.0);
if (*s)
s += r_length;
}
*NF = (double) i;
return i;
}
mkrec(u) CELL *u;
{
register char *s, *t;
register int i, j;
for (j = (int)*NF, i = 1; i <= j; i++)
if (field[i] == u)
break;
if (i > j) {
for ( ; i < MAXFLD; i++)
if (field[i] == u)
break;
if (i == MAXFLD)
error("too many field (%d)", i);
*NF = (double)i;
}
for (t = record, i = 1, j = (int) *NF; i <= j; i++) {
if (i > 1)
*t++ = **OFS;
for (s = getsval(field[i]); *s; )
*t++ = *s++;
}
*t++ = '\0';
}
CELL *
Field(p) NODE *p;
{
CELL *u;
int i, j;
u = execute(p->n_arg[0]);
i = (int) getfval(u);
c_free(u);
j = (int)*NF;
if (i > j)
for (++j; j <= i; j++) {
if (field[j] == NULL)
field[j] = mkcell(FLD|STR, "", 0.0);
}
return field[i];
}
CELL *
P1stat(p) NODE *p;
{
CELL *u;
double x;
pateval++;
u = execute(p->n_arg[0]);
pateval = 0;
x = getfval(u);
c_free(u);
if (x != 0.0)
u = execute(p->n_arg[1]);
else
u = &truecell;
return u;
}
CELL *
P2stat(p) NODE *p;
{
static stat = 0;
CELL *u, *v;
double x;
switch (stat) {
case 0:
pateval++;
u = execute(p->n_arg[0]);
pateval = 0;
x = getfval(u);
c_free(u);
if (x == 0.0) {
u = &truecell; break;
}
else
stat++;
/* fall through */
case 1:
u = execute(p->n_arg[2]);
c_free(u);
pateval++;
u = execute(p->n_arg[1]);
pateval = 0;
x = getfval(u);
if (x != 0.0)
stat = 0;
break;
default:
u = &truecell;
break;
}
return u;
}
CELL *
Print0()
{
/*
int i, j;
char *s, str[BUFSIZ];
for (*str = '\0', i = 1, j = (int) *NF; i <= j; i++) {
if (i > 1)
strcat(str, *OFS);
s = getsval(field[i]);
strcat(str, s);
}
strcat(str, *ORS);
fputs(str, stdout);
*/
fprintf(stdout, "%s%s", record, *ORS);
return &truecell;
}
char *
format(t, p) char *t; NODE *p;
{
CELL *u, *v;
char *r, *s, *s0, fmt[BUFSIZ];
double x;
int i;
u = execute(p->n_arg[2]);
s = s0 = getsval(u);
/*
printf("fmt(%s)\n", s);
*/
for (i = 3; *s; s++) {
if (isKanji(*s)) {
*t++ = *s++; *t++ = *s; continue;
}
if (*s != '%') {
*t++ = *s; continue;
}
else if (*(s + 1) == '%') {
*t++ = *s++; continue;
}
for (r = fmt, *r++ = *s++; *r++ = *s; s++) {
if (strchr("%cdefgosux", *s))
break;
}
*r = '\0';
if (p->n_arg[i] == NULL)
error("not enough args in printf(%s)", s0);
v = execute(p->n_arg[i++]);
if (*s == 's')
r = getsval(v);
else
x = getfval(v);
/*
printf("val(%d)(%s)\n", v->c_type, v->c_sval);
*/
switch (*s) {
case 'c':
sprintf(t, fmt, (int) x);
break;
case 'd':
if (*(s - 1) != 'l') {
*--r = 'l'; *++r = 'd'; *++r = '\0';
}
sprintf(t, fmt, (long) x);
break;
case 'e': case 'f': case 'g':
sprintf(t, fmt, x);
break;
case 'o': case 'u': case 'x':
if (*(s - 1) == 'l')
sprintf(t, fmt, (long) x);
else
sprintf(t, fmt, (int) x);
break;
case 's':
/*r = getsval(v);*/
sprintf(t, fmt, r);
break;
default:
strcpy(t, fmt);
break;
}
c_free(v);
t += strlen(t);
}
c_free(u);
*t = '\0';
}
#define MAXFILE 10
struct {
char *f_name; /* file name */
FILE *f_fp;
int f_type;
} filetab[MAXFILE];
FILE *
getfp(file, type) char *file;
{
register int i;
register char *name, *mode;
char *awktmp();
FILE *fp, *efopen(), *epopen();
for (i = 0; i < MAXFILE; i++)
if (filetab[i].f_name && strcmp(filetab[i].f_name, file) == 0)
return filetab[i].f_fp;
for (i = 0; i < MAXFILE; i++)
if (!filetab[i].f_fp)
break;
if (i == MAXFILE)
error("too many files to open");
name = file;
switch (type) {
case R_OUT: mode = "w"; break;
case R_APD: mode = "a"; break;
case R_POUT:
#ifdef DOS
name = awktmp(i); mode = "w"; /* MS-DOS */
#else
fp = epopen(file, "w");
goto g1;
#endif
break;
case R_IN: mode = "r"; break;
case R_PIN:
#ifdef DOS
{
int savefd, fd, result;
name = awktmp(i);
if ((fd = open(name,
O_WRONLY|O_TEXT|O_CREAT|O_TRUNC,S_IREAD|S_IWRITE)) == -1)
error("can't open %s", name);
savefd = dup(1); dup2(fd, 1); close(fd);
if ((result =
system(file)) == -1)
error("can't exec %s", file);
dup2(savefd, 1); close(savefd); close(fd);
mode = "r";
}
#else
fp = epopen(file,"r");
goto g1;
#endif
break;
}
fp = efopen(name, mode);
g1:
filetab[i].f_name = strsave(file);
filetab[i].f_type = type;
filetab[i].f_fp = fp;
return fp;
}
closeall()
{
register int i;
for (i = 0; i < MAXFILE; i++)
close1(i);
}
CELL *
Close(s) char *s;
{
register int i;
for (i = 0; i < MAXFILE; i++)
if (strcmp(s, filetab[i].f_name) == 0) {
close1(i);
break;
}
i = (i == MAXFILE) ? 0 : 1;
return mktmp(NUM, NULL, (double) i);
}
static
close1(i)
{
int fd, result, savefd;
char *awktmp();
if (filetab[i].f_fp == NULL)
return;
switch (filetab[i].f_type) {
case R_PIN:
#ifdef DOS
fclose(filetab[i].f_fp);
unlink(awktmp(i));
#else
pclose(filetab[i].f_fp);
#endif
break;
case R_IN: case R_OUT: case R_APD:
fclose(filetab[i].f_fp);
break;
case R_POUT:
#ifdef DOS
fclose(filetab[i].f_fp);
if ((fd = open(awktmp(i), O_RDONLY)) == NULL)
error("can't open %s", awktmp(i));
savefd = dup(0);
dup2(fd, 0);
close(fd);
if ((result =
system(filetab[i].f_name)) == -1)
/*
spawnl(P_WAIT, "/usr/bin/sh", "sh", "-c", filetab[i].f_name, (char *) 0)) == -1)
fprintf(stderr, "can't spawn /bin/sh\n");
*/
error("can't exec %s", filetab[i].f_name);
dup2(savefd, 0);
close(savefd);
unlink(awktmp(i));
#else
pclose(filetab[i].f_fp);
#endif
break;
}
sfree(filetab[i].f_name);
filetab[i].f_type = 0;
filetab[i].f_name = NULL;
filetab[i].f_fp = NULL;
}
#ifndef DOS
FILE *
epopen(file, mod) char *file, *mod;
{
FILE *fp, *popen();
if ((fp = popen(file, mod)) == NULL)
error("can't poen %s", file);
return fp;
}
#endif
static char *
awktmp(i)
{
static char str[16];
sprintf(str, "awk000%02d.tmp", i);
return str;
}
Index(s, t) char *s, *t;
{
register char *u, *v;
register int i;
for (i = 1; *s; s++, i++) {
for (u = s, v = t; *v; u++, v++) {
if (isKanji(*v)) {
if (*u != *v)
break;
u++; v++;
}
if (*u != *v)
break;
}
if (*v == '\0')
return i;
if (isKanji(*s))
s++;
}
return 0;
}