src/cal/rcalc.c

#ifndef lint
static const char RCSid[] = "$Id: rcalc.c,v 1.38 2023/03/10 17:38:01 greg Exp $";
#endif
/*
 * rcalc.c - record calculator program.
 *
 * 9/11/87
 */

#include <stdlib.h>
#include <math.h>
#include <ctype.h>

#include "platform.h"
#include "rterror.h"
#include "rtmisc.h"
#include "rtio.h"
#include "calcomp.h"

#define isnum(c) (isdigit(c) || ((c)=='-') | ((c)=='.') \
                                | ((c)=='+') | ((c)=='e') | ((c)=='E'))

#define isblnk(c) (igneol ? isspace(c) : ((c)==' ')|((c)=='\t'))

#define INBSIZ  16384   /* longest record */
#define MAXCOL  32      /* number of columns recorded */

                        /* field type specifications */
#define F_NUL   0               /* empty */
#define F_TYP   0x7000          /* mask for type */
#define F_WID   0x0fff          /* mask for width */
#define T_LIT   0x1000          /* string literal */
#define T_STR   0x2000          /* string variable */
#define T_NUM   0x3000          /* numeric value */

struct strvar {         /* string variable */
        char *name;
        char *val;
        char *preset;
        struct strvar *next;
};

struct field {          /* record format structure */
        int type;               /* type of field (& width) */
        union {
                char *sl;               /* string literal */
                struct strvar *sv;      /* string variable */
                char *nv;               /* numeric variable */
                EPNODE *ne;             /* numeric expression */
        } f;                    /* field contents */
        struct field *next;     /* next field in record */
};

#define savqstr(s) strcpy(emalloc(strlen(s)+1),s)
#define freqstr(s) efree(s)

static int getinputrec(FILE *fp);
static void scaninp(void), skipinp(void), advinp(int skip);
static void putrec(void), putout(void), nbsynch(void);
static int getrec(void);
static void execute(char *file);
static void initinp(FILE *fp);
static void svpreset(char *eqn);
static void readfmt(char *spec, int output);
static int readfield(char **pp);
static int getfield(struct field *f);
static void chanset(int n, double v);
static void bchanset(int n, double v);
static struct strvar* getsvar(char *svname);
static double l_in(char *);

struct field *inpfmt = NULL;    /* input record format */
struct field *outfmt = NULL;    /* output record structure */
struct strvar *svhead = NULL;   /* string variables */

long incnt = 0;                 /* limit number of input records? */
long outcnt = 0;                /* limit number of output records? */

int blnkeq = 1;                 /* blanks compare equal? */
int igneol = 0;                 /* ignore end of line? */
int passive = 0;                /* passive mode (transmit unmatched input) */
char sepchar = '\t';            /* input/output separator */
int noinput = 0;                /* no input records? */
int itype = 'a';                /* input type (a/f/F/d/D) */
int nbicols = 0;                /* number of binary input columns */
int otype = 'a';                /* output format (a/f/F/d/D) */
char inpbuf[INBSIZ];            /* input buffer */
double colval[MAXCOL];          /* input column values */
unsigned long colflg = 0;       /* column retrieved flags */
int colpos;                     /* output column position */

int nowarn = 0;                 /* non-fatal diagnostic output */
int unbuff = 0;                 /* unbuffered output (flush each record) */

struct {
        FILE *fin;              /* input file */
        int chr;                /* next character */
        char *beg;              /* home position */
        char *pos;              /* scan position */
        char *end;              /* read position */
} ipb;                  /* circular lookahead buffer */


int
main(
int argc,
char *argv[]
)
{
        char *fpath;
        int i;

        esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_OUTCHAN|E_RCONST;
        esupport &= ~(E_REDEFW);

#ifdef BIGGERLIB
        biggerlib();
#endif
        varset("PI", ':', 3.14159265358979323846);
        funset("in", 1, '=', &l_in);

        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case 'b':
                        blnkeq = !blnkeq;
                        break;
                case 'l':
                        igneol = !igneol;
                        break;
                case 'p':
                        passive = 1;
                        break;
                case 'P':
                        passive = -1;
                        break;
                case 't':
                        sepchar = argv[i][2];
                        break;
                case 's':
                        svpreset(argv[++i]);
                        break;
                case 'f':
                        fpath = getpath(argv[++i], getrlibpath(), 0);
                        if (fpath == NULL) {
                                eputs(argv[0]);
                                eputs(": cannot find file '");
                                eputs(argv[i]);
                                eputs("'\n");
                                quit(1);
                        }
                        fcompile(fpath);
                        break;
                case 'e':
                        scompile(argv[++i], NULL, 0);
                        break;
                case 'n':
                        noinput = 1;
                        esupport &= ~E_RCONST;
                        break;
                case 'i':
                        switch (argv[i][2]) {
                        case '\0':
                                itype = 'a';
                                nbicols = 0;
                                readfmt(argv[++i], 0);
                                break;
                        case 'n':
                                incnt = atol(argv[++i]);
                                break;
                        case 'a':
                                itype = 'a';
                                nbicols = 0;
                                break;
                        case 'd':
                        case 'D':
                                itype = argv[i][2];
                                if (isdigit(argv[i][3]))
                                        nbicols = atoi(argv[i]+3);
                                else
                                        nbicols = 1;
                                if (nbicols*sizeof(double) > INBSIZ) {
                                        eputs(argv[0]);
                                        eputs(": too many input columns\n");
                                        quit(1);
                                }
                                break;
                        case 'f':
                        case 'F':
                                itype = argv[i][2];
                                if (isdigit(argv[i][3]))
                                        nbicols = atoi(argv[i]+3);
                                else
                                        nbicols = 1;
                                if (nbicols*sizeof(float) > INBSIZ) {
                                        eputs(argv[0]);
                                        eputs(": too many input columns\n");
                                        quit(1);
                                }
                                break;
                        default:
                                goto userr;
                        }
                        break;
                case 'o':
                        switch (argv[i][2]) {
                        case '\0':
                                otype = 'a';
                                readfmt(argv[++i], 1);
                                break;
                        case 'n':
                                outcnt = atol(argv[++i]);
                                break;
                        case 'a':
                                otype = 'a';
                                break;
                        case 'd':
                        case 'D':
                        case 'f':
                        case 'F':
                                otype = argv[i][2];
                                break;
                        default:
                                goto userr;
                        }
                        break;
                case 'w':
                        nowarn = !nowarn;
                        break;
                case 'u':
                        unbuff = !unbuff;
                        break;
                default:;
                userr:
                        eputs("Usage: ");
                        eputs(argv[0]);
eputs(" [-b][-l][-n][-p|-P][-w][-u][-tS][-s svar=sval][-e expr][-f source][-i infmt][-o outfmt] [file]\n");
                        quit(1);
                }
        if (otype != 'a')
                SET_FILE_BINARY(stdout);
#ifdef getc_unlocked            /* avoid lock/unlock overhead */
        flockfile(stdout);
#endif
        if (noinput) {  /* produce a single output record */
                if (i < argc) {
                        eputs(argv[0]);
                        eputs(": file argument(s) incompatible with -n\n");
                        quit(1);
                }
                eclock++;
                putout();
                quit(0);
        }
        if (passive && (inpfmt == NULL) | (outfmt == NULL)) {
                eputs(argv[0]);
                eputs(": options -p and -P require -i and -o formats\n");
                quit(1);
        }
        if (blnkeq)     /* for efficiency */
                nbsynch();

        doptimize(1);   /* optimize definitions */

        if (i == argc)  /* from stdin */
                execute(NULL);
        else            /* from one or more files */
                for ( ; i < argc; i++)
                        execute(argv[i]);
        
        quit(0);
        return 0; /* pro forma return */
}


static void
nbsynch(void)   /* non-blank starting synch character */
{
        if (inpfmt == NULL || (inpfmt->type & F_TYP) != T_LIT)
                return;
        while (isblnk(*inpfmt->f.sl))
                inpfmt->f.sl++;
        if (!*inpfmt->f.sl)
                inpfmt = inpfmt->next;
}


static int
getinputrec(            /* get next input record */
FILE *fp
)
{
        if ((itype == 'd') | (itype == 'D')) {
                if (getbinary(inpbuf, sizeof(double), nbicols, fp) != nbicols)
                        return(0);
                if (itype == 'D')
                        swap64(inpbuf, nbicols);
                return(1);
        }
        if ((itype == 'f') | (itype == 'F')) {
                if (getbinary(inpbuf, sizeof(float), nbicols, fp) != nbicols)
                        return(0);
                if (itype == 'F')
                        swap32(inpbuf, nbicols);
                return(1);
        }
        return(fgets(inpbuf, INBSIZ, fp) != NULL);
}


static void
execute(        /* process a file */
char *file
)
{
        static char     condVN[] = "cond";
        static char     recnoVN[] = "recno";
        static char     outnoVN[] = "outno";
        const int       conditional = vardefined(condVN);
        const int       set_recno = (varlookup(recnoVN) != NULL);
        const int       set_outno = (varlookup(outnoVN) != NULL);
        long            nrecs = 0;
        long            nout = 0;
        FILE            *fp;
        
        if (file == NULL)
                fp = stdin;
        else if ((fp = fopen(file, "r")) == NULL) {
                eputs(file);
                eputs(": cannot open\n");
                quit(1);
        }
        if (itype != 'a')
                SET_FILE_BINARY(fp);
#ifdef getc_unlocked            /* avoid lock/unlock overhead */
        flockfile(fp);
#endif
        if (conditional == ':') {
                eputs(condVN);
                eputs(": defined as constant\n");
                quit(1);
        }
        if (inpfmt != NULL)
                initinp(fp);
        
        while (inpfmt != NULL ? getrec() : getinputrec(fp)) {
                ++nrecs;
                if (set_recno)
                        varset(recnoVN, '=', (double)nrecs);
                if (set_outno)
                        varset(outnoVN, '=', (double)(nout+1));
                colflg = 0;
                eclock++;
                if (!conditional || varvalue(condVN) > 0.0) {
                        if (inpfmt != NULL)
                                advinp(0);
                        putout();
                        ++nout;
                } else if (inpfmt != NULL) {
                        advinp(1);
                }
                if (incnt && nrecs >= incnt)
                        break;
                if (outcnt && nout >= outcnt)
                        break;
        }
        fclose(fp);
}


static void
putout(void)            /* produce an output record */
{

        colpos = 0;
        if (outfmt != NULL)
                putrec();
        else if (otype == 'a')
                chanout(chanset);
        else
                chanout(bchanset);
        if (colpos && otype == 'a')
                putchar('\n');
        if (unbuff)
                fflush(stdout);
}


static double
l_in(char *funame)      /* function call for $channel */
{
        int n;
        char *cp;
                        /* get argument as integer */
        n = (int)(argument(1) + .5);
        if (n != 0)     /* return channel value */
                return(chanvalue(n));
                        /* determine number of channels */
        if (noinput || inpfmt != NULL)
                return(0);
        if (nbicols)
                return(nbicols);
        cp = inpbuf;    /* need to count */
        for (n = 0; *cp; )
                if (blnkeq && isspace(sepchar)) {
                        while (isspace(*cp))
                                cp++;
                        n += *cp != '\0';
                        while (*cp && !isspace(*cp))
                                cp++;
                } else {
                        n += *cp != '\n';
                        while (*cp && *cp++ != sepchar)
                                ;
                }
        return(n);
}

double
chanvalue(      /* return value for column n */
int n
)
{
        int i;
        char *cp;

        if (noinput || inpfmt != NULL) {
                eputs("no column input\n");
                quit(1);
        }
        if (n < 1) {
                eputs("illegal channel number\n");
                quit(1);
        }
        if (nbicols) {
                if (n > nbicols)
                        return(0.0);
                if ((itype == 'd') | (itype == 'D')) {
                        cp = inpbuf + (n-1)*sizeof(double);
                        return(*(double *)cp);
                }
                cp = inpbuf + (n-1)*sizeof(float);
                return(*(float *)cp);
        }
        if (n <= MAXCOL && colflg & 1L<<(n-1))
                return(colval[n-1]);

        cp = inpbuf;
        for (i = 1; i < n; i++)
                if (blnkeq && isspace(sepchar)) {
                        while (isspace(*cp))
                                cp++;
                        while (*cp && !isspace(*cp))
                                cp++;
                } else
                        while (*cp && *cp++ != sepchar)
                                ;

        while (isspace(*cp))    /* some atof()'s don't like tabs */
                cp++;

        if (n <= MAXCOL) {
                colflg |= 1L<<(n-1);
                return(colval[n-1] = atof(cp));
        } else
                return(atof(cp));
}


void
chanset(                /* output column n */
int n,
double v
)
{
        if (colpos == 0)                /* no leading separator */
                colpos = 1;
        while (colpos < n) {
                putchar(sepchar);
                colpos++;
        }
        printf("%.9g", v);
}


void
bchanset(               /* output binary channel n */
int n,
double v
)
{
        static char     zerobuf[sizeof(double)];
        const int       otlen = ((otype == 'd') | (otype == 'D')) ?
                                        sizeof(double) : sizeof(float);
        float   fval = v;

        while (++colpos < n)
                putbinary(zerobuf, otlen, 1, stdout);
        switch (otype) {
        case 'D':
                swap64((char *)&v, 1);
                /* fall through */
        case 'd':
                putbinary(&v, sizeof(double), 1, stdout);
                break;
        case 'F':
                swap32((char *)&fval, 1);
                /* fall through */
        case 'f':
                putbinary(&fval, sizeof(float), 1, stdout);
                break;
        }
}


static void
readfmt(                /* read record format */
char *spec,
int output
)
{
        int fd;
        char *inptr;
        struct field fmt;
        int res;
        struct field *f;
                                                /* check for inline format */
        for (inptr = spec; *inptr; inptr++)
                if (*inptr == '$')
                        break;
        if (*inptr)                     /* inline */
                inptr = spec;
        else {                          /* from file */
                if ((fd = open(spec, 0)) == -1) {
                        eputs(spec);
                        eputs(": cannot open\n");
                        quit(1);
                }
                res = read(fd, inpbuf+2, INBSIZ-2);
                if (res <= 0 || res >= INBSIZ-1) {
                        eputs(spec);
                        if (res < 0)
                                eputs(": read error\n");
                        else if (res == 0)
                                eputs(": empty file\n");
                        else if (res >= INBSIZ-1)
                                eputs(": format too long\n");
                        quit(1);
                }
                close(fd);
                (inptr=inpbuf+2)[res] = '\0';
        }
        f = &fmt;                       /* get fields */
        while ((res = readfield(&inptr)) != F_NUL) {
                f->next = (struct field *)emalloc(sizeof(struct field));
                f = f->next;
                f->type = res;
                switch (res & F_TYP) {
                case T_LIT:
                        f->f.sl = savqstr(inpbuf);
                        break;
                case T_STR:
                        f->f.sv = getsvar(inpbuf);
                        break;
                case T_NUM:
                        if (output)
                                f->f.ne = eparse(inpbuf);
                        else
                                f->f.nv = savestr(inpbuf);
                        break;
                }
                                        /* add final newline if necessary */
                if (!igneol && *inptr == '\0' && inptr[-1] != '\n')
                        inptr = "\n";
        }
        f->next = NULL;
        if (output)
                outfmt = fmt.next;
        else
                inpfmt = fmt.next;
}


static int
readfield(              /* get next field in format */
char **pp
)
{
        int type = F_NUL;
        int width = 0;
        char *cp;
        
        cp = inpbuf;
        while (cp < &inpbuf[INBSIZ-1] && **pp != '\0') {
                width++;
                switch (type) {
                case F_NUL:
                        if (**pp == '$') {
                                (*pp)++;
                                width++;
                                if (**pp == '{') {
                                        type = T_NUM;
                                        (*pp)++;
                                        continue;
                                } else if (**pp == '(') {
                                        type = T_STR;
                                        (*pp)++;
                                        continue;
                                } else if (**pp != '$') {
                                        eputs("format error\n");
                                        quit(1);
                                }
                                width--;
                        }
                        type = T_LIT;
                        *cp++ = *(*pp)++;
                        continue;
                case T_LIT:
                        if (**pp == '$') {
                                width--;
                                break;
                        }
                        *cp++ = *(*pp)++;
                        continue;
                case T_NUM:
                        if (**pp == '}') {
                                (*pp)++;
                                break;
                        }
                        if (!isspace(**pp))
                                *cp++ = **pp;
                        (*pp)++;
                        continue;
                case T_STR:
                        if (**pp == ')') {
                                (*pp)++;
                                break;
                        }
                        if (!isspace(**pp))
                                *cp++ = **pp;
                        (*pp)++;
                        continue;
                }
                break;
        }
        *cp = '\0';
        return(type | width);
}


struct strvar *
getsvar(                        /* get string variable */
char *svname
)
{
        struct strvar *sv;
        
        for (sv = svhead; sv != NULL; sv = sv->next)
                if (!strcmp(sv->name, svname))
                        return(sv);
        sv = (struct strvar *)emalloc(sizeof(struct strvar));
        sv->name = savqstr(svname);
        sv->val = sv->preset = NULL;
        sv->next = svhead;
        svhead = sv;
        return(sv);
}


static void
svpreset(               /* preset a string variable */
char *eqn
)
{
        struct strvar *sv;
        char *val;

        for (val = eqn; *val != '='; val++)
                if (!*val)
                        return;
        *val++ = '\0';
        sv = getsvar(eqn);
        if (sv->preset != NULL)
                freqstr(sv->preset);
        if (sv->val != NULL)
                freqstr(sv->val);
        sv->val = sv->preset = savqstr(val);
        *--val = '=';
}


static void
clearrec(void)                  /* clear input record variables */
{
        struct field *f;

        for (f = inpfmt; f != NULL; f = f->next)
                switch (f->type & F_TYP) {
                case T_NUM:
                        dremove(f->f.nv);
                        break;
                case T_STR:
                        if (f->f.sv->val != f->f.sv->preset) {
                                freqstr(f->f.sv->val);
                                f->f.sv->val = f->f.sv->preset;
                        }
                        break;
                }
}


static int
getrec(void)                    /* get next record from file */
{
        int eatline;
        struct field *f;

        while (ipb.chr != EOF) {
                if (blnkeq) {           /* beware of nbsynch() */
                        while (isblnk(ipb.chr))
                                skipinp();
                        if (ipb.chr == EOF)
                                return(0);
                }
                eatline = !igneol & (ipb.chr != '\n');
                clearrec();             /* start with fresh record */
                for (f = inpfmt; f != NULL; f = f->next)
                        if (!getfield(f))
                                break;
                if (f == NULL)          /* got one? */
                        return(1);
                skipinp();              /* else eat false start */
                if (eatline) {          /* eat rest of line */
                        while (ipb.chr != '\n') {
                                if (ipb.chr == EOF)
                                        return(0);
                                skipinp();
                        }
                        skipinp();
                }
        }
        return(0);
}


static int
getfield(                       /* get next field */
struct field *f
)
{
        static char buf[RMAXWORD+1];    /* no recursion! */
        int delim, inword;
        double d;
        char *np;
        char *cp;

        switch (f->type & F_TYP) {
        case T_LIT:
                cp = f->f.sl;
                do {
                        if (blnkeq && isblnk(*cp)) {
                                if (!isblnk(ipb.chr))
                                        return(0);
                                do
                                        cp++;
                                while (isblnk(*cp));
                                do
                                        scaninp();
                                while (isblnk(ipb.chr));
                        } else if (*cp == ipb.chr) {
                                cp++;
                                scaninp();
                        } else
                                return(0);
                } while (*cp);
                break;
        case T_STR:
                if (f->next == NULL || (f->next->type & F_TYP) != T_LIT)
                        delim = EOF;
                else
                        delim = f->next->f.sl[0];
                cp = buf;
                do {
                        if ((ipb.chr == EOF) | (ipb.chr == '\n'))
                                inword = 0;
                        else if (blnkeq && delim != EOF)
                                inword = isblnk(delim) ?
                                                !isblnk(ipb.chr)
                                                : ipb.chr != delim;
                        else
                                inword = cp-buf < (f->type & F_WID);
                        if (inword) {
                                *cp++ = ipb.chr;
                                scaninp();
                        }
                } while (inword && cp < &buf[RMAXWORD]);
                *cp = '\0';
                if (f->f.sv->val == NULL)
                        f->f.sv->val = savqstr(buf);    /* first setting */
                else if (strcmp(f->f.sv->val, buf))
                        return(0);                      /* doesn't match! */
                break;
        case T_NUM:
                if (f->next == NULL || (f->next->type & F_TYP) != T_LIT)
                        delim = EOF;
                else
                        delim = f->next->f.sl[0];
                np = NULL;
                cp = buf;
                do {
                        if (!((np==NULL&&isblnk(ipb.chr)) || isnum(ipb.chr)))
                                inword = 0;
                        else if (blnkeq && delim != EOF)
                                inword = isblnk(delim) ?
                                                !isblnk(ipb.chr)
                                                : ipb.chr != delim;
                        else
                                inword = cp-buf < (f->type & F_WID);
                        if (inword) {
                                if (np==NULL && !isblnk(ipb.chr))
                                        np = cp;
                                *cp++ = ipb.chr;
                                scaninp();
                        }
                } while (inword && cp < &buf[RMAXWORD]);
                *cp = '\0';
                d = np==NULL ? 0. : atof(np);
                if (!vardefined(f->f.nv))
                        varset(f->f.nv, '=', d);        /* first setting */
                else if ((d = (varvalue(f->f.nv)-d)/(d==0.?1.:d)) > .001
                                || d < -.001)
                        return(0);                      /* doesn't match! */
                break;
        }
        return(1);      /* success! */
}


static void
putrec(void)                            /* output a record */
{
        char fmt[32], typ[16];
        int n;
        struct field *f;
        int adlast, adnext;
        double dv, av;
        
        adlast = 0;
        for (f = outfmt; f != NULL; f = f->next) {
                adnext =        blnkeq &&
                                f->next != NULL &&
                                !( (f->next->type&F_TYP) == T_LIT &&
                                        f->next->f.sl[0] == ' ' );
                switch (f->type & F_TYP) {
                case T_LIT:
                        fputs(f->f.sl, stdout);
                        adlast = f->f.sl[(f->type&F_WID)-1] != ' ';
                        break;
                case T_STR:
                        if (f->f.sv->val == NULL) {
                                eputs(f->f.sv->name);
                                eputs(": undefined string\n");
                                quit(1);
                        }
                        n = (int)(f->type & F_WID) - strlen(f->f.sv->val);
                        if (adlast)
                                fputs(f->f.sv->val, stdout);
                        if (!(adlast && adnext))
                                while (n-- > 0)
                                        putchar(' ');
                        if (!adlast)
                                fputs(f->f.sv->val, stdout);
                        adlast = 1;
                        break;
                case T_NUM:
                        n = f->type & F_WID;
                        dv = evalue(f->f.ne);
                        av = fabs(dv);
                        if (n <= 9)
                                strcpy(typ, "g");
                        else
                                sprintf(typ, ".%de", n-5);
                        if (av < 1L<<31) {
                                long    iv = (int)(av + .5);
                                if (iv && fabs(av-iv) <= av*1e-14)
                                        strcpy(typ, ".0f");
                        }
                        if (adlast && adnext)
                                sprintf(fmt, "%%%s", typ);
                        else if (adlast)
                                sprintf(fmt, "%%-%d%s", n, typ);
                        else
                                sprintf(fmt, "%%%d%s", n, typ);
                        printf(fmt, dv);
                        adlast = 1;
                        break;
                }
        }
}


static void
initinp(FILE *fp)               /* prepare lookahead buffer */

{
        ipb.fin = fp;
        ipb.beg = ipb.end = inpbuf;
        ipb.pos = inpbuf-1;             /* position before beginning */
        ipb.chr = '\0';
        scaninp();
}


static void
scaninp(void)                   /* scan next character */
{
        if (ipb.chr == EOF)
                return;
        if (++ipb.pos >= &inpbuf[INBSIZ])
                ipb.pos = inpbuf;
        if (ipb.pos == ipb.end) {       /* new character */
                if ((ipb.chr = getc(ipb.fin)) != EOF) {
                        *ipb.end = ipb.chr;
                        if (++ipb.end >= &inpbuf[INBSIZ])
                                ipb.end = inpbuf;
                        if (ipb.end == ipb.beg)
                                ipb.beg = NULL;
                }
        } else
                ipb.chr = *ipb.pos;
}


static void
skipinp(void)                   /* rewind position and advance 1 */
{
        if (ipb.beg == NULL)            /* can't fully rewind? */
                ipb.beg = ipb.end;
        ipb.pos = ipb.beg;
        ipb.chr = *ipb.pos;
        if (passive)                    /* transmit unmatched character? */
                putchar(ipb.chr);
        if (++ipb.beg >= &inpbuf[INBSIZ])
                ipb.beg = inpbuf;
        scaninp();
}


static void
advinp(int skip)                /* advance home to current position */
{
        if (!skip | (passive >= 0)) {
                ipb.beg = ipb.pos;      /* no need to copy input */
                return;
        }
        if (ipb.beg == NULL) {          /* buffer overflowed a bit? */
                wputs("buffer overflow\n");
                puts("\n*** MISSING DATA ***");
                ipb.beg = ipb.end;
        }
        while (ipb.beg != ipb.pos) {    /* copy buffer to current */
                putchar(*ipb.beg);
                if (++ipb.beg >= &inpbuf[INBSIZ])
                        ipb.beg = inpbuf;
        }
}


void
eputs(const char *msg)
{
        fputs(msg, stderr);
}


void
wputs(const char *msg)
{
        if (!nowarn)
                eputs(msg);
}


void
quit(int code)
{
        exit(code);
}
Revision:	1.39
Committed:	Fri Feb 23 03:47:57 2024 UTC (2 months, 1 week ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.38:	+3 -1 lines
Log Message:	perf: Added array index optimization to calcomp routines