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839 lines
20 KiB
839 lines
20 KiB
/****************************************************************
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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 <strings.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 <limits.h>
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#include <math.h>
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#include "awk.h"
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char EMPTY[] = { '\0' };
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FILE *infile = NULL;
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bool innew; /* true = infile has not been read by readrec */
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char *file = EMPTY;
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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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static size_t len_inputFS = 0;
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static char *inputFS = NULL; /* FS at time of input, for field splitting */
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#define MAXFLD 2
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int nfields = MAXFLD; /* last allocated slot for $i */
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bool donefld; /* true = implies rec broken into fields */
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bool donerec; /* true = 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, EMPTY, 0.0, REC|STR|DONTFREE, NULL, NULL };
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static Cell dollar1 = { OCELL, CFLD, NULL, EMPTY, 0.0, FLD|STR|DONTFREE, NULL, NULL };
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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 **) calloc(nfields+2, sizeof(*fldtab))) == NULL
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|| (fldtab[0] = (Cell *) malloc(sizeof(**fldtab))) == NULL)
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FATAL("out of space for $0 and fields");
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*record = '\0';
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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(**fldtab));
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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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snprintf(temp, sizeof(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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p = getargv(i); /* find 1st real filename */
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if (p == NULL || *p == '\0') { /* deleted or zapped */
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argno++;
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continue;
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}
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if (!isclvar(p)) {
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setsval(lookup("FILENAME", symtab), p);
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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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innew = true;
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}
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/*
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* POSIX specifies that fields are supposed to be evaluated as if they were
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* split using the value of FS at the time that the record's value ($0) was
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* read.
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*
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* Since field-splitting is done lazily, we save the current value of FS
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* whenever a new record is read in (implicitly or via getline), or when
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* a new value is assigned to $0.
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*/
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void savefs(void)
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{
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size_t len;
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if ((len = strlen(getsval(fsloc))) < len_inputFS) {
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strcpy(inputFS, *FS); /* for subsequent field splitting */
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return;
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}
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len_inputFS = len + 1;
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inputFS = (char *) realloc(inputFS, len_inputFS);
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if (inputFS == NULL)
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FATAL("field separator %.10s... is too long", *FS);
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memcpy(inputFS, *FS, len_inputFS);
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}
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static bool firsttime = true;
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int getrec(char **pbuf, int *pbufsize, bool 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 = false;
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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 = false;
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donerec = true;
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savefs();
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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 == NULL || *file == '\0') { /* deleted or 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, innew);
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if (innew)
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innew = false;
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if (c != 0 || buf[0] != '\0') { /* normal record */
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if (isrecord) {
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double result;
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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, & result)) {
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fldtab[0]->fval = result;
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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, bool newflag) /* read one record into buf */
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{
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int sep, c, isrec;
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char *rr, *buf = *pbuf;
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int bufsize = *pbufsize;
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char *rs = getsval(rsloc);
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if (*rs && rs[1]) {
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bool found;
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fa *pfa = makedfa(rs, 1);
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if (newflag)
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found = fnematch(pfa, inf, &buf, &bufsize, recsize);
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else {
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int tempstat = pfa->initstat;
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pfa->initstat = 2;
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found = fnematch(pfa, inf, &buf, &bufsize, recsize);
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pfa->initstat = tempstat;
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}
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if (found)
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setptr(patbeg, '\0');
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} else {
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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,
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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,
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"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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}
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*pbuf = buf;
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*pbufsize = bufsize;
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isrec = *buf || !feof(inf);
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DPRINTF("readrec saw <%s>, returns %d\n", buf, isrec);
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return isrec;
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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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snprintf(temp, sizeof(temp), "%d", n);
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if (lookup(temp, ARGVtab) == NULL)
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return NULL;
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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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double result;
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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, & result)) {
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q->fval = result;
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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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/* possibly with a final trailing \0 not associated with any field */
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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+2)) == NULL) /* possibly 2 final \0s */
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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 (inputFS == NULL) /* make sure we have a copy of FS */
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savefs();
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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 += n) {
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char buf[MB_LEN_MAX + 1];
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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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n = mblen(r, MB_LEN_MAX);
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if (n < 0)
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n = 1;
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memcpy(buf, r, n);
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buf[n] = '\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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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;
|
|
}
|
|
*fr = 0;
|
|
}
|
|
if (i > nfields)
|
|
FATAL("record `%.30s...' has too many fields; can't happen", r);
|
|
cleanfld(i+1, lastfld); /* clean out junk from previous record */
|
|
lastfld = i;
|
|
donefld = true;
|
|
for (j = 1; j <= lastfld; j++) {
|
|
double result;
|
|
|
|
p = fldtab[j];
|
|
if(is_number(p->sval, & result)) {
|
|
p->fval = result;
|
|
p->tval |= NUM;
|
|
}
|
|
}
|
|
setfval(nfloc, (Awkfloat) lastfld);
|
|
donerec = true; /* restore */
|
|
if (dbg) {
|
|
for (j = 0; j <= lastfld; j++) {
|
|
p = fldtab[j];
|
|
printf("field %d (%s): |%s|\n", j, p->nval, p->sval);
|
|
}
|
|
}
|
|
}
|
|
|
|
void cleanfld(int n1, int n2) /* clean out fields n1 .. n2 inclusive */
|
|
{ /* nvals remain intact */
|
|
Cell *p;
|
|
int i;
|
|
|
|
for (i = n1; i <= n2; i++) {
|
|
p = fldtab[i];
|
|
if (freeable(p))
|
|
xfree(p->sval);
|
|
p->sval = EMPTY,
|
|
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);
|
|
}
|
|
|
|
void setlastfld(int n) /* set lastfld cleaning fldtab cells if necessary */
|
|
{
|
|
if (n < 0)
|
|
FATAL("cannot set NF to a negative value");
|
|
if (n > nfields)
|
|
growfldtab(n);
|
|
|
|
if (lastfld < n)
|
|
cleanfld(lastfld+1, n);
|
|
else
|
|
cleanfld(n+1, lastfld);
|
|
|
|
lastfld = n;
|
|
}
|
|
|
|
Cell *fieldadr(int n) /* get nth field */
|
|
{
|
|
if (n < 0)
|
|
FATAL("trying to access out of range 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;
|
|
size_t s;
|
|
|
|
if (n > nf)
|
|
nf = n;
|
|
s = (nf+1) * (sizeof (struct Cell *)); /* freebsd: how much do we need? */
|
|
if (s / sizeof(struct Cell *) - 1 == (size_t)nf) /* didn't overflow */
|
|
fldtab = (Cell **) realloc(fldtab, s);
|
|
else /* overflow sizeof int */
|
|
xfree(fldtab); /* make it null */
|
|
if (fldtab == NULL)
|
|
FATAL("out of space creating %d fields", nf);
|
|
makefields(nfields+1, nf);
|
|
nfields = nf;
|
|
}
|
|
|
|
int refldbld(const char *rec, const 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;
|
|
int i, tempstat, n;
|
|
fa *pfa;
|
|
|
|
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;
|
|
pfa = makedfa(fs, 1);
|
|
DPRINTF("into refldbld, rec = <%s>, pat = <%s>\n", rec, fs);
|
|
tempstat = pfa->initstat;
|
|
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(pfa, rec)) {
|
|
pfa->initstat = 2; /* horrible coupling to b.c */
|
|
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);
|
|
pfa->initstat = tempstat;
|
|
break;
|
|
}
|
|
}
|
|
return i;
|
|
}
|
|
|
|
void recbld(void) /* create $0 from $1..$NF if necessary */
|
|
{
|
|
int i;
|
|
char *r, *p;
|
|
char *sep = getsval(ofsloc);
|
|
|
|
if (donerec)
|
|
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(sep)+r-record, recsize, &r, "recbld 2"))
|
|
FATAL("created $0 `%.30s...' too long", record);
|
|
for (p = sep; (*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, (void*)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, (void*)fldtab[0]);
|
|
DPRINTF("recbld = |%s|\n", record);
|
|
donerec = true;
|
|
}
|
|
|
|
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 == COMPILING && cursource() != NULL)
|
|
fprintf(stderr, " source file %s", cursource());
|
|
fprintf(stderr, "\n");
|
|
errorflag = 2;
|
|
eprint();
|
|
}
|
|
|
|
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 != ERROR_PRINTING) {
|
|
if (NR && *NR > 0) {
|
|
fprintf(stderr, " input record number %d", (int) (*FNR));
|
|
if (strcmp(*FILENAME, "-") != 0)
|
|
fprintf(stderr, ", file %s", *FILENAME);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
if (curnode)
|
|
fprintf(stderr, " source line number %d", curnode->lineno);
|
|
else if (lineno)
|
|
fprintf(stderr, " source line number %d", lineno);
|
|
if (compile_time == COMPILING && 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 != COMPILING || been_here++ > 0 || ebuf == ep)
|
|
return;
|
|
if (ebuf == ep)
|
|
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;
|
|
}
|
|
|
|
/* 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 */
|
|
|
|
/* well, not quite. As of C99, hex floating point is allowed. so this is
|
|
* a bit of a mess. We work around the mess by checking for a hexadecimal
|
|
* value and disallowing it. Similarly, we now follow gawk and allow only
|
|
* +nan, -nan, +inf, and -inf for NaN and infinity values.
|
|
*/
|
|
|
|
/*
|
|
* This routine now has a more complicated interface, the main point
|
|
* being to avoid the double conversion of a string to double, and
|
|
* also to convey out, if requested, the information that the numeric
|
|
* value was a leading string or is all of the string. The latter bit
|
|
* is used in getfval().
|
|
*/
|
|
|
|
bool is_valid_number(const char *s, bool trailing_stuff_ok,
|
|
bool *no_trailing, double *result)
|
|
{
|
|
double r;
|
|
char *ep;
|
|
bool retval = false;
|
|
bool is_nan = false;
|
|
bool is_inf = false;
|
|
|
|
if (no_trailing)
|
|
*no_trailing = false;
|
|
|
|
while (isspace(*s))
|
|
s++;
|
|
|
|
// no hex floating point, sorry
|
|
if (s[0] == '0' && tolower(s[1]) == 'x')
|
|
return false;
|
|
|
|
// allow +nan, -nan, +inf, -inf, any other letter, no
|
|
if (s[0] == '+' || s[0] == '-') {
|
|
is_nan = (strncasecmp(s+1, "nan", 3) == 0);
|
|
is_inf = (strncasecmp(s+1, "inf", 3) == 0);
|
|
if ((is_nan || is_inf)
|
|
&& (isspace(s[4]) || s[4] == '\0'))
|
|
goto convert;
|
|
else if (! isdigit(s[1]) && s[1] != '.')
|
|
return false;
|
|
}
|
|
else if (! isdigit(s[0]) && s[0] != '.')
|
|
return false;
|
|
|
|
convert:
|
|
errno = 0;
|
|
r = strtod(s, &ep);
|
|
if (ep == s || errno == ERANGE)
|
|
return false;
|
|
|
|
if (isnan(r) && s[0] == '-' && signbit(r) == 0)
|
|
r = -r;
|
|
|
|
if (result != NULL)
|
|
*result = r;
|
|
|
|
/*
|
|
* check for trailing stuff
|
|
*/
|
|
while (isspace(*ep))
|
|
ep++;
|
|
|
|
if (no_trailing != NULL)
|
|
*no_trailing = (*ep == '\0');
|
|
|
|
// return true if found the end, or trailing stuff is allowed
|
|
retval = *ep == '\0' || trailing_stuff_ok;
|
|
|
|
return retval;
|
|
}
|