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initial import
This commit is contained in:
garbeam@wmii.de
686
awk/lib.c
Normal file
686
awk/lib.c
Normal file
@@ -0,0 +1,686 @@
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/****************************************************************
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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
|
||||
copies and that both that the copyright notice and this
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||||
permission notice and warranty disclaimer appear in supporting
|
||||
documentation, and that the name Lucent Technologies or any of
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its entities not be used in advertising or publicity pertaining
|
||||
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
|
||||
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 "y.tab.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 200
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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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record = (char *) malloc(n);
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fields = (char *) malloc(n);
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fldtab = (Cell **) malloc((nfields+1) * sizeof(Cell *));
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if (record == NULL || fields == NULL || fldtab == NULL)
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FATAL("out of space for $0 and fields");
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fldtab[0] = (Cell *) malloc(sizeof (Cell));
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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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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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static int firsttime = 1;
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char *buf = *pbuf;
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int bufsize = *pbufsize;
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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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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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*pbuf = buf;
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*pbufsize = bufsize;
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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 != 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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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 != '\n' && *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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||||
}
|
||||
}
|
||||
setfval(nfloc, (Awkfloat) lastfld);
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||||
if (dbg) {
|
||||
for (j = 0; j <= lastfld; j++) {
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||||
p = fldtab[j];
|
||||
printf("field %d (%s): |%s|\n", j, p->nval, p->sval);
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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++) {
|
||||
p = fldtab[i];
|
||||
if (freeable(p))
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||||
xfree(p->sval);
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||||
p->sval = "";
|
||||
p->tval = FLD | STR | DONTFREE;
|
||||
}
|
||||
}
|
||||
|
||||
void newfld(int n) /* add field n after end of existing lastfld */
|
||||
{
|
||||
if (n > nfields)
|
||||
growfldtab(n);
|
||||
cleanfld(lastfld+1, n);
|
||||
lastfld = n;
|
||||
setfval(nfloc, (Awkfloat) n);
|
||||
}
|
||||
|
||||
Cell *fieldadr(int n) /* get nth field */
|
||||
{
|
||||
if (n < 0)
|
||||
FATAL("trying to access field %d", n);
|
||||
if (n > nfields) /* fields after NF are empty */
|
||||
growfldtab(n); /* but does not increase NF */
|
||||
return(fldtab[n]);
|
||||
}
|
||||
|
||||
void growfldtab(int n) /* make new fields up to at least $n */
|
||||
{
|
||||
int nf = 2 * nfields;
|
||||
|
||||
if (n > nf)
|
||||
nf = n;
|
||||
fldtab = (Cell **) realloc(fldtab, (nf+1) * (sizeof (struct Cell *)));
|
||||
if (fldtab == NULL)
|
||||
FATAL("out of space creating %d fields", nf);
|
||||
makefields(nfields+1, nf);
|
||||
nfields = nf;
|
||||
}
|
||||
|
||||
int refldbld(char *rec, char *fs) /* build fields from reg expr in FS */
|
||||
{
|
||||
/* this relies on having fields[] the same length as $0 */
|
||||
/* the fields are all stored in this one array with \0's */
|
||||
char *fr;
|
||||
void *p;
|
||||
int i, n;
|
||||
|
||||
n = strlen(rec);
|
||||
if (n > fieldssize) {
|
||||
xfree(fields);
|
||||
if ((fields = (char *) malloc(n+1)) == NULL)
|
||||
FATAL("out of space for fields in refldbld %d", n);
|
||||
fieldssize = n;
|
||||
}
|
||||
fr = fields;
|
||||
*fr = '\0';
|
||||
if (*rec == '\0')
|
||||
return 0;
|
||||
p = compre(fs);
|
||||
dprintf( ("into refldbld, rec = <%s>, pat = <%s>\n", rec, fs) );
|
||||
for (i = 1; ; i++) {
|
||||
if (i > nfields)
|
||||
growfldtab(i);
|
||||
if (freeable(fldtab[i]))
|
||||
xfree(fldtab[i]->sval);
|
||||
fldtab[i]->tval = FLD | STR | DONTFREE;
|
||||
fldtab[i]->sval = fr;
|
||||
dprintf( ("refldbld: i=%d\n", i) );
|
||||
if (nematch(p, rec, rec)) {
|
||||
dprintf( ("match %s (%d chars)\n", patbeg, patlen) );
|
||||
strncpy(fr, rec, patbeg-rec);
|
||||
fr += patbeg - rec + 1;
|
||||
*(fr-1) = '\0';
|
||||
rec = patbeg + patlen;
|
||||
} else {
|
||||
dprintf( ("no match %s\n", rec) );
|
||||
strcpy(fr, rec);
|
||||
break;
|
||||
}
|
||||
}
|
||||
return i;
|
||||
}
|
||||
|
||||
void recbld(void) /* create $0 from $1..$NF if necessary */
|
||||
{
|
||||
int i;
|
||||
char *r, *p;
|
||||
|
||||
if (donerec == 1)
|
||||
return;
|
||||
r = record;
|
||||
for (i = 1; i <= *NF; i++) {
|
||||
p = getsval(fldtab[i]);
|
||||
if (!adjbuf(&record, &recsize, 1+strlen(p)+r-record, recsize, &r, "recbld 1"))
|
||||
FATAL("created $0 `%.30s...' too long", record);
|
||||
while ((*r = *p++) != 0)
|
||||
r++;
|
||||
if (i < *NF) {
|
||||
if (!adjbuf(&record, &recsize, 2+strlen(*OFS)+r-record, recsize, &r, "recbld 2"))
|
||||
FATAL("created $0 `%.30s...' too long", record);
|
||||
for (p = *OFS; (*r = *p++) != 0; )
|
||||
r++;
|
||||
}
|
||||
}
|
||||
if (!adjbuf(&record, &recsize, 2+r-record, recsize, &r, "recbld 3"))
|
||||
FATAL("built giant record `%.30s...'", record);
|
||||
*r = '\0';
|
||||
dprintf( ("in recbld inputFS=%s, fldtab[0]=%p\n", inputFS, fldtab[0]) );
|
||||
|
||||
if (freeable(fldtab[0]))
|
||||
xfree(fldtab[0]->sval);
|
||||
fldtab[0]->tval = REC | STR | DONTFREE;
|
||||
fldtab[0]->sval = record;
|
||||
|
||||
dprintf( ("in recbld inputFS=%s, fldtab[0]=%p\n", inputFS, fldtab[0]) );
|
||||
dprintf( ("recbld = |%s|\n", record) );
|
||||
donerec = 1;
|
||||
}
|
||||
|
||||
int errorflag = 0;
|
||||
|
||||
void yyerror(char *s)
|
||||
{
|
||||
SYNTAX(s);
|
||||
}
|
||||
|
||||
void SYNTAX(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);
|
||||
if(compile_time == 1 && cursource() != NULL)
|
||||
fprintf(stderr, " at %s:%d", cursource(), lineno);
|
||||
else
|
||||
fprintf(stderr, " at line %d", lineno);
|
||||
if (curfname != NULL)
|
||||
fprintf(stderr, " in function %s", curfname);
|
||||
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(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(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;
|
||||
int line;
|
||||
|
||||
fprintf(stderr, "\n");
|
||||
if (compile_time != 2 && NR && *NR > 0) {
|
||||
if (strcmp(*FILENAME, "-") != 0)
|
||||
fprintf(stderr, " input record %s:%d", *FILENAME, (int) (*FNR));
|
||||
else
|
||||
fprintf(stderr, " input record number %d", (int) (*FNR));
|
||||
fprintf(stderr, "\n");
|
||||
}
|
||||
if (compile_time != 2 && curnode)
|
||||
line = curnode->lineno;
|
||||
else if (compile_time != 2 && lineno)
|
||||
line = lineno;
|
||||
else
|
||||
line = -1;
|
||||
if (compile_time == 1 && cursource() != NULL){
|
||||
if(line >= 0)
|
||||
fprintf(stderr, " source %s:%d", cursource(), line);
|
||||
else
|
||||
fprintf(stderr, " source file %s", cursource());
|
||||
}else if(line >= 0)
|
||||
fprintf(stderr, " source line %d", line);
|
||||
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, 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(char *s) /* is s of form var=something ? */
|
||||
{
|
||||
char *os = s;
|
||||
|
||||
if (!isalpha(*s) && *s != '_')
|
||||
return 0;
|
||||
for ( ; *s; s++)
|
||||
if (!(isalnum(*s) || *s == '_'))
|
||||
break;
|
||||
return *s == '=' && s > os && *(s+1) != '=';
|
||||
}
|
||||
|
||||
/* strtod is supposed to be a proper test of what's a valid number */
|
||||
|
||||
#include <math.h>
|
||||
int is_number(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;
|
||||
}
|
||||
Reference in New Issue
Block a user