697 lines
17 KiB
C
697 lines
17 KiB
C
/****************************************************************
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Copyright (C) Lucent Technologies 1997
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name Lucent Technologies or any of
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its entities not be used in advertising or publicity pertaining
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to distribution of the software without specific, written prior
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permission.
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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****************************************************************/
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#define DEBUG
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include "awk.h"
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#include "ytab.h"
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FILE *infile = NULL;
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char *file = "";
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char *record;
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int recsize = RECSIZE;
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char *fields;
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int fieldssize = RECSIZE;
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Cell **fldtab; /* pointers to Cells */
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char inputFS[100] = " ";
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#define MAXFLD 2
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int nfields = MAXFLD; /* last allocated slot for $i */
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int donefld; /* 1 = implies rec broken into fields */
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int donerec; /* 1 = record is valid (no flds have changed) */
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int lastfld = 0; /* last used field */
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int argno = 1; /* current input argument number */
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extern Awkfloat *ARGC;
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static Cell dollar0 = { OCELL, CFLD, NULL, "", 0.0, REC|STR|DONTFREE };
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static Cell dollar1 = { OCELL, CFLD, NULL, "", 0.0, FLD|STR|DONTFREE };
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void recinit(unsigned int n)
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{
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if ( (record = (char *) malloc(n)) == NULL
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|| (fields = (char *) malloc(n+1)) == NULL
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|| (fldtab = (Cell **) malloc((nfields+1) * sizeof(Cell *))) == NULL
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|| (fldtab[0] = (Cell *) malloc(sizeof(Cell))) == NULL )
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FATAL("out of space for $0 and fields");
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*fldtab[0] = dollar0;
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fldtab[0]->sval = record;
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fldtab[0]->nval = tostring("0");
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makefields(1, nfields);
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}
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void makefields(int n1, int n2) /* create $n1..$n2 inclusive */
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{
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char temp[50];
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int i;
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for (i = n1; i <= n2; i++) {
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fldtab[i] = (Cell *) malloc(sizeof (struct Cell));
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if (fldtab[i] == NULL)
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FATAL("out of space in makefields %d", i);
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*fldtab[i] = dollar1;
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sprintf(temp, "%d", i);
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fldtab[i]->nval = tostring(temp);
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}
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}
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void initgetrec(void)
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{
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int i;
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char *p;
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for (i = 1; i < *ARGC; i++) {
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if (!isclvar(p = getargv(i))) { /* find 1st real filename */
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setsval(lookup("FILENAME", symtab), getargv(i));
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return;
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}
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setclvar(p); /* a commandline assignment before filename */
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argno++;
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}
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infile = stdin; /* no filenames, so use stdin */
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}
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static int firsttime = 1;
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int getrec(char **pbuf, int *pbufsize, int isrecord) /* get next input record */
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{ /* note: cares whether buf == record */
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int c;
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char *buf = *pbuf;
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uschar saveb0;
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int bufsize = *pbufsize, savebufsize = bufsize;
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if (firsttime) {
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firsttime = 0;
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initgetrec();
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}
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dprintf( ("RS=<%s>, FS=<%s>, ARGC=%g, FILENAME=%s\n",
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*RS, *FS, *ARGC, *FILENAME) );
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if (isrecord) {
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donefld = 0;
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donerec = 1;
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}
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saveb0 = buf[0];
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buf[0] = 0;
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while (argno < *ARGC || infile == stdin) {
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dprintf( ("argno=%d, file=|%s|\n", argno, file) );
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if (infile == NULL) { /* have to open a new file */
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file = getargv(argno);
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if (*file == '\0') { /* it's been zapped */
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argno++;
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continue;
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}
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if (isclvar(file)) { /* a var=value arg */
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setclvar(file);
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argno++;
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continue;
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}
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*FILENAME = file;
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dprintf( ("opening file %s\n", file) );
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if (*file == '-' && *(file+1) == '\0')
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infile = stdin;
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else if ((infile = fopen(file, "r")) == NULL)
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FATAL("can't open file %s", file);
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setfval(fnrloc, 0.0);
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}
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c = readrec(&buf, &bufsize, infile);
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if (c != 0 || buf[0] != '\0') { /* normal record */
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if (isrecord) {
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if (freeable(fldtab[0]))
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xfree(fldtab[0]->sval);
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fldtab[0]->sval = buf; /* buf == record */
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fldtab[0]->tval = REC | STR | DONTFREE;
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if (is_number(fldtab[0]->sval)) {
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fldtab[0]->fval = atof(fldtab[0]->sval);
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fldtab[0]->tval |= NUM;
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}
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}
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setfval(nrloc, nrloc->fval+1);
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setfval(fnrloc, fnrloc->fval+1);
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*pbuf = buf;
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*pbufsize = bufsize;
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return 1;
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}
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/* EOF arrived on this file; set up next */
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if (infile != stdin)
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fclose(infile);
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infile = NULL;
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argno++;
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}
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buf[0] = saveb0;
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*pbuf = buf;
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*pbufsize = savebufsize;
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return 0; /* true end of file */
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}
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void nextfile(void)
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{
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if (infile != NULL && infile != stdin)
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fclose(infile);
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infile = NULL;
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argno++;
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}
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int readrec(char **pbuf, int *pbufsize, FILE *inf) /* read one record into buf */
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{
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int sep, c;
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char *rr, *buf = *pbuf;
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int bufsize = *pbufsize;
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if (strlen(*FS) >= sizeof(inputFS))
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FATAL("field separator %.10s... is too long", *FS);
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strcpy(inputFS, *FS); /* for subsequent field splitting */
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if ((sep = **RS) == 0) {
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sep = '\n';
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while ((c=getc(inf)) == '\n' && c != EOF) /* skip leading \n's */
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;
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if (c != EOF)
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ungetc(c, inf);
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}
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for (rr = buf; ; ) {
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for (; (c=getc(inf)) != sep && c != EOF; ) {
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if (rr-buf+1 > bufsize)
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if (!adjbuf(&buf, &bufsize, 1+rr-buf, recsize, &rr, "readrec 1"))
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FATAL("input record `%.30s...' too long", buf);
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*rr++ = c;
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}
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if (**RS == sep || c == EOF)
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break;
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if ((c = getc(inf)) == '\n' || c == EOF) /* 2 in a row */
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break;
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if (!adjbuf(&buf, &bufsize, 2+rr-buf, recsize, &rr, "readrec 2"))
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FATAL("input record `%.30s...' too long", buf);
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*rr++ = '\n';
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*rr++ = c;
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}
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if (!adjbuf(&buf, &bufsize, 1+rr-buf, recsize, &rr, "readrec 3"))
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FATAL("input record `%.30s...' too long", buf);
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*rr = 0;
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dprintf( ("readrec saw <%s>, returns %d\n", buf, c == EOF && rr == buf ? 0 : 1) );
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*pbuf = buf;
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*pbufsize = bufsize;
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return c == EOF && rr == buf ? 0 : 1;
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}
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char *getargv(int n) /* get ARGV[n] */
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{
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Cell *x;
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char *s, temp[50];
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extern Array *ARGVtab;
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sprintf(temp, "%d", n);
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x = setsymtab(temp, "", 0.0, STR, ARGVtab);
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s = getsval(x);
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dprintf( ("getargv(%d) returns |%s|\n", n, s) );
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return s;
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}
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void setclvar(char *s) /* set var=value from s */
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{
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char *p;
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Cell *q;
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for (p=s; *p != '='; p++)
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;
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*p++ = 0;
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p = qstring(p, '\0');
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q = setsymtab(s, p, 0.0, STR, symtab);
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setsval(q, p);
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if (is_number(q->sval)) {
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q->fval = atof(q->sval);
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q->tval |= NUM;
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}
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dprintf( ("command line set %s to |%s|\n", s, p) );
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}
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void fldbld(void) /* create fields from current record */
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{
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/* this relies on having fields[] the same length as $0 */
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/* the fields are all stored in this one array with \0's */
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char *r, *fr, sep;
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Cell *p;
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int i, j, n;
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if (donefld)
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return;
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if (!isstr(fldtab[0]))
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getsval(fldtab[0]);
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r = fldtab[0]->sval;
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n = strlen(r);
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if (n > fieldssize) {
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xfree(fields);
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if ((fields = (char *) malloc(n+1)) == NULL)
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FATAL("out of space for fields in fldbld %d", n);
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fieldssize = n;
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}
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fr = fields;
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i = 0; /* number of fields accumulated here */
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if (strlen(inputFS) > 1) { /* it's a regular expression */
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i = refldbld(r, inputFS);
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} else if ((sep = *inputFS) == ' ') { /* default whitespace */
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for (i = 0; ; ) {
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while (*r == ' ' || *r == '\t' || *r == '\n')
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r++;
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if (*r == 0)
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break;
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i++;
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if (i > nfields)
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growfldtab(i);
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if (freeable(fldtab[i]))
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xfree(fldtab[i]->sval);
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fldtab[i]->sval = fr;
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fldtab[i]->tval = FLD | STR | DONTFREE;
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do
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*fr++ = *r++;
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while (*r != ' ' && *r != '\t' && *r != '\n' && *r != '\0');
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*fr++ = 0;
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}
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*fr = 0;
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} else if ((sep = *inputFS) == 0) { /* new: FS="" => 1 char/field */
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for (i = 0; *r != 0; r++) {
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char buf[2];
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i++;
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if (i > nfields)
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growfldtab(i);
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if (freeable(fldtab[i]))
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xfree(fldtab[i]->sval);
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buf[0] = *r;
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buf[1] = 0;
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fldtab[i]->sval = tostring(buf);
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fldtab[i]->tval = FLD | STR;
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}
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*fr = 0;
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} else if (*r != 0) { /* if 0, it's a null field */
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/* subtlecase : if length(FS) == 1 && length(RS > 0)
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* \n is NOT a field separator (cf awk book 61,84).
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* this variable is tested in the inner while loop.
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*/
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int rtest = '\n'; /* normal case */
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if (strlen(*RS) > 0)
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rtest = '\0';
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for (;;) {
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i++;
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if (i > nfields)
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growfldtab(i);
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if (freeable(fldtab[i]))
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xfree(fldtab[i]->sval);
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fldtab[i]->sval = fr;
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fldtab[i]->tval = FLD | STR | DONTFREE;
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while (*r != sep && *r != rtest && *r != '\0') /* \n is always a separator */
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*fr++ = *r++;
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*fr++ = 0;
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if (*r++ == 0)
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break;
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}
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*fr = 0;
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}
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if (i > nfields)
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FATAL("record `%.30s...' has too many fields; can't happen", r);
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cleanfld(i+1, lastfld); /* clean out junk from previous record */
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lastfld = i;
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donefld = 1;
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for (j = 1; j <= lastfld; j++) {
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p = fldtab[j];
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if(is_number(p->sval)) {
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p->fval = atof(p->sval);
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p->tval |= NUM;
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}
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}
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setfval(nfloc, (Awkfloat) lastfld);
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if (dbg) {
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for (j = 0; j <= lastfld; j++) {
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p = fldtab[j];
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printf("field %d (%s): |%s|\n", j, p->nval, p->sval);
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}
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}
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}
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void cleanfld(int n1, int n2) /* clean out fields n1 .. n2 inclusive */
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{ /* nvals remain intact */
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Cell *p;
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int i;
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for (i = n1; i <= n2; i++) {
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p = fldtab[i];
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if (freeable(p))
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xfree(p->sval);
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p->sval = "";
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p->tval = FLD | STR | DONTFREE;
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}
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}
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void newfld(int n) /* add field n after end of existing lastfld */
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{
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if (n > nfields)
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growfldtab(n);
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cleanfld(lastfld+1, n);
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lastfld = n;
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setfval(nfloc, (Awkfloat) n);
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}
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Cell *fieldadr(int n) /* get nth field */
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{
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if (n < 0)
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FATAL("trying to access out of range field %d", n);
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if (n > nfields) /* fields after NF are empty */
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growfldtab(n); /* but does not increase NF */
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return(fldtab[n]);
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}
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void growfldtab(int n) /* make new fields up to at least $n */
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{
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int nf = 2 * nfields;
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size_t s;
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if (n > nf)
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nf = n;
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s = (nf+1) * (sizeof (struct Cell *)); /* freebsd: how much do we need? */
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if (s / sizeof(struct Cell *) - 1 == nf) /* didn't overflow */
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fldtab = (Cell **) realloc(fldtab, s);
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else /* overflow sizeof int */
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xfree(fldtab); /* make it null */
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if (fldtab == NULL)
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FATAL("out of space creating %d fields", nf);
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makefields(nfields+1, nf);
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nfields = nf;
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}
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int refldbld(const char *rec, const char *fs) /* build fields from reg expr in FS */
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{
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/* this relies on having fields[] the same length as $0 */
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/* the fields are all stored in this one array with \0's */
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char *fr;
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int i, tempstat, n;
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fa *pfa;
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n = strlen(rec);
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if (n > fieldssize) {
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xfree(fields);
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if ((fields = (char *) malloc(n+1)) == NULL)
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FATAL("out of space for fields in refldbld %d", n);
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fieldssize = n;
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}
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fr = fields;
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*fr = '\0';
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if (*rec == '\0')
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return 0;
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pfa = makedfa(fs, 1);
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dprintf( ("into refldbld, rec = <%s>, pat = <%s>\n", rec, fs) );
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tempstat = pfa->initstat;
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for (i = 1; ; i++) {
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if (i > nfields)
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growfldtab(i);
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if (freeable(fldtab[i]))
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xfree(fldtab[i]->sval);
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fldtab[i]->tval = FLD | STR | DONTFREE;
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fldtab[i]->sval = fr;
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dprintf( ("refldbld: i=%d\n", i) );
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if (nematch(pfa, rec)) {
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pfa->initstat = 2; /* horrible coupling to b.c */
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dprintf( ("match %s (%d chars)\n", patbeg, patlen) );
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strncpy(fr, rec, patbeg-rec);
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fr += patbeg - rec + 1;
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*(fr-1) = '\0';
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rec = patbeg + patlen;
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} else {
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dprintf( ("no match %s\n", rec) );
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strcpy(fr, rec);
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pfa->initstat = tempstat;
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break;
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}
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}
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return i;
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}
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void recbld(void) /* create $0 from $1..$NF if necessary */
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{
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int i;
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char *r, *p;
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if (donerec == 1)
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return;
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r = record;
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for (i = 1; i <= *NF; i++) {
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p = getsval(fldtab[i]);
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if (!adjbuf(&record, &recsize, 1+strlen(p)+r-record, recsize, &r, "recbld 1"))
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FATAL("created $0 `%.30s...' too long", record);
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while ((*r = *p++) != 0)
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r++;
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if (i < *NF) {
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if (!adjbuf(&record, &recsize, 2+strlen(*OFS)+r-record, recsize, &r, "recbld 2"))
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FATAL("created $0 `%.30s...' too long", record);
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for (p = *OFS; (*r = *p++) != 0; )
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r++;
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}
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}
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if (!adjbuf(&record, &recsize, 2+r-record, recsize, &r, "recbld 3"))
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FATAL("built giant record `%.30s...'", record);
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*r = '\0';
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dprintf( ("in recbld inputFS=%s, fldtab[0]=%p\n", inputFS, fldtab[0]) );
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if (freeable(fldtab[0]))
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xfree(fldtab[0]->sval);
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fldtab[0]->tval = REC | STR | DONTFREE;
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fldtab[0]->sval = record;
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dprintf( ("in recbld inputFS=%s, fldtab[0]=%p\n", inputFS, fldtab[0]) );
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dprintf( ("recbld = |%s|\n", record) );
|
|
donerec = 1;
|
|
}
|
|
|
|
int errorflag = 0;
|
|
|
|
void yyerror(const char *s)
|
|
{
|
|
SYNTAX("%s", s);
|
|
}
|
|
|
|
void SYNTAX(const char *fmt, ...)
|
|
{
|
|
extern char *cmdname, *curfname;
|
|
static int been_here = 0;
|
|
va_list varg;
|
|
|
|
if (been_here++ > 2)
|
|
return;
|
|
fprintf(stderr, "%s: ", cmdname);
|
|
va_start(varg, fmt);
|
|
vfprintf(stderr, fmt, varg);
|
|
va_end(varg);
|
|
fprintf(stderr, " at source line %d", lineno);
|
|
if (curfname != NULL)
|
|
fprintf(stderr, " in function %s", curfname);
|
|
if (compile_time == 1 && cursource() != NULL)
|
|
fprintf(stderr, " source file %s", cursource());
|
|
fprintf(stderr, "\n");
|
|
errorflag = 2;
|
|
eprint();
|
|
}
|
|
|
|
void fpecatch(int n)
|
|
{
|
|
FATAL("floating point exception %d", n);
|
|
}
|
|
|
|
extern int bracecnt, brackcnt, parencnt;
|
|
|
|
void bracecheck(void)
|
|
{
|
|
int c;
|
|
static int beenhere = 0;
|
|
|
|
if (beenhere++)
|
|
return;
|
|
while ((c = input()) != EOF && c != '\0')
|
|
bclass(c);
|
|
bcheck2(bracecnt, '{', '}');
|
|
bcheck2(brackcnt, '[', ']');
|
|
bcheck2(parencnt, '(', ')');
|
|
}
|
|
|
|
void bcheck2(int n, int c1, int c2)
|
|
{
|
|
if (n == 1)
|
|
fprintf(stderr, "\tmissing %c\n", c2);
|
|
else if (n > 1)
|
|
fprintf(stderr, "\t%d missing %c's\n", n, c2);
|
|
else if (n == -1)
|
|
fprintf(stderr, "\textra %c\n", c2);
|
|
else if (n < -1)
|
|
fprintf(stderr, "\t%d extra %c's\n", -n, c2);
|
|
}
|
|
|
|
void FATAL(const char *fmt, ...)
|
|
{
|
|
extern char *cmdname;
|
|
va_list varg;
|
|
|
|
fflush(stdout);
|
|
fprintf(stderr, "%s: ", cmdname);
|
|
va_start(varg, fmt);
|
|
vfprintf(stderr, fmt, varg);
|
|
va_end(varg);
|
|
error();
|
|
if (dbg > 1) /* core dump if serious debugging on */
|
|
abort();
|
|
exit(2);
|
|
}
|
|
|
|
void WARNING(const char *fmt, ...)
|
|
{
|
|
extern char *cmdname;
|
|
va_list varg;
|
|
|
|
fflush(stdout);
|
|
fprintf(stderr, "%s: ", cmdname);
|
|
va_start(varg, fmt);
|
|
vfprintf(stderr, fmt, varg);
|
|
va_end(varg);
|
|
error();
|
|
}
|
|
|
|
void error()
|
|
{
|
|
extern Node *curnode;
|
|
|
|
fprintf(stderr, "\n");
|
|
if (compile_time != 2 && NR && *NR > 0) {
|
|
fprintf(stderr, " input record number %d", (int) (*FNR));
|
|
if (strcmp(*FILENAME, "-") != 0)
|
|
fprintf(stderr, ", file %s", *FILENAME);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
if (compile_time != 2 && curnode)
|
|
fprintf(stderr, " source line number %d", curnode->lineno);
|
|
else if (compile_time != 2 && lineno)
|
|
fprintf(stderr, " source line number %d", lineno);
|
|
if (compile_time == 1 && cursource() != NULL)
|
|
fprintf(stderr, " source file %s", cursource());
|
|
fprintf(stderr, "\n");
|
|
eprint();
|
|
}
|
|
|
|
void eprint(void) /* try to print context around error */
|
|
{
|
|
char *p, *q;
|
|
int c;
|
|
static int been_here = 0;
|
|
extern char ebuf[], *ep;
|
|
|
|
if (compile_time == 2 || compile_time == 0 || been_here++ > 0)
|
|
return;
|
|
p = ep - 1;
|
|
if (p > ebuf && *p == '\n')
|
|
p--;
|
|
for ( ; p > ebuf && *p != '\n' && *p != '\0'; p--)
|
|
;
|
|
while (*p == '\n')
|
|
p++;
|
|
fprintf(stderr, " context is\n\t");
|
|
for (q=ep-1; q>=p && *q!=' ' && *q!='\t' && *q!='\n'; q--)
|
|
;
|
|
for ( ; p < q; p++)
|
|
if (*p)
|
|
putc(*p, stderr);
|
|
fprintf(stderr, " >>> ");
|
|
for ( ; p < ep; p++)
|
|
if (*p)
|
|
putc(*p, stderr);
|
|
fprintf(stderr, " <<< ");
|
|
if (*ep)
|
|
while ((c = input()) != '\n' && c != '\0' && c != EOF) {
|
|
putc(c, stderr);
|
|
bclass(c);
|
|
}
|
|
putc('\n', stderr);
|
|
ep = ebuf;
|
|
}
|
|
|
|
void bclass(int c)
|
|
{
|
|
switch (c) {
|
|
case '{': bracecnt++; break;
|
|
case '}': bracecnt--; break;
|
|
case '[': brackcnt++; break;
|
|
case ']': brackcnt--; break;
|
|
case '(': parencnt++; break;
|
|
case ')': parencnt--; break;
|
|
}
|
|
}
|
|
|
|
double errcheck(double x, const char *s)
|
|
{
|
|
|
|
if (errno == EDOM) {
|
|
errno = 0;
|
|
WARNING("%s argument out of domain", s);
|
|
x = 1;
|
|
} else if (errno == ERANGE) {
|
|
errno = 0;
|
|
WARNING("%s result out of range", s);
|
|
x = 1;
|
|
}
|
|
return x;
|
|
}
|
|
|
|
int isclvar(const char *s) /* is s of form var=something ? */
|
|
{
|
|
const char *os = s;
|
|
|
|
if (!isalpha((uschar) *s) && *s != '_')
|
|
return 0;
|
|
for ( ; *s; s++)
|
|
if (!(isalnum((uschar) *s) || *s == '_'))
|
|
break;
|
|
return *s == '=' && s > os && *(s+1) != '=';
|
|
}
|
|
|
|
/* strtod is supposed to be a proper test of what's a valid number */
|
|
/* appears to be broken in gcc on linux: thinks 0x123 is a valid FP number */
|
|
/* wrong: violates 4.10.1.4 of ansi C standard */
|
|
|
|
#include <math.h>
|
|
int is_number(const char *s)
|
|
{
|
|
double r;
|
|
char *ep;
|
|
errno = 0;
|
|
r = strtod(s, &ep);
|
|
if (ep == s || r == HUGE_VAL || errno == ERANGE)
|
|
return 0;
|
|
while (*ep == ' ' || *ep == '\t' || *ep == '\n')
|
|
ep++;
|
|
if (*ep == '\0')
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|