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run.c
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/****************************************************************
Copyright (C) Lucent Technologies 1997
All Rights Reserved
Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name Lucent Technologies or any of
its entities not be used in advertising or publicity pertaining
to distribution of the software without specific, written prior
permission.
LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
THIS SOFTWARE.
****************************************************************/
#define DEBUG
#include <stdio.h>
#include <ctype.h>
#include <setjmp.h>
#include <limits.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "awk.h"
#include "ytab.h"
#define tempfree(x) if (istemp(x)) tfree(x); else
/*
#undef tempfree
void tempfree(Cell *p) {
if (p->ctype == OCELL && (p->csub < CUNK || p->csub > CFREE)) {
WARNING("bad csub %d in Cell %d %s",
p->csub, p->ctype, p->sval);
}
if (istemp(p))
tfree(p);
}
*/
/* do we really need these? */
/* #ifdef _NFILE */
/* #ifndef FOPEN_MAX */
/* #define FOPEN_MAX _NFILE */
/* #endif */
/* #endif */
/* */
/* #ifndef FOPEN_MAX */
/* #define FOPEN_MAX 40 */ /* max number of open files */
/* #endif */
/* */
/* #ifndef RAND_MAX */
/* #define RAND_MAX 32767 */ /* all that ansi guarantees */
/* #endif */
jmp_buf env;
extern int pairstack[];
extern Awkfloat srand_seed;
Node *winner = NULL; /* root of parse tree */
Cell *tmps; /* free temporary cells for execution */
static Cell truecell ={ OBOOL, BTRUE, 0, 0, 1.0, NUM, NULL };
Cell *True = &truecell;
static Cell falsecell ={ OBOOL, BFALSE, 0, 0, 0.0, NUM, NULL };
Cell *False = &falsecell;
static Cell breakcell ={ OJUMP, JBREAK, 0, 0, 0.0, NUM, NULL };
Cell *jbreak = &breakcell;
static Cell contcell ={ OJUMP, JCONT, 0, 0, 0.0, NUM, NULL };
Cell *jcont = &contcell;
static Cell nextcell ={ OJUMP, JNEXT, 0, 0, 0.0, NUM, NULL };
Cell *jnext = &nextcell;
static Cell nextfilecell ={ OJUMP, JNEXTFILE, 0, 0, 0.0, NUM, NULL };
Cell *jnextfile = &nextfilecell;
static Cell exitcell ={ OJUMP, JEXIT, 0, 0, 0.0, NUM, NULL };
Cell *jexit = &exitcell;
static Cell retcell ={ OJUMP, JRET, 0, 0, 0.0, NUM, NULL };
Cell *jret = &retcell;
static Cell tempcell ={ OCELL, CTEMP, 0, "", 0.0, NUM|STR|DONTFREE, NULL };
Node *curnode = NULL; /* the node being executed, for debugging */
/* buffer memory management */
int adjbuf(char **pbuf, int *psiz, int minlen, int quantum, char **pbptr,
const char *whatrtn)
/* pbuf: address of pointer to buffer being managed
* psiz: address of buffer size variable
* minlen: minimum length of buffer needed
* quantum: buffer size quantum
* pbptr: address of movable pointer into buffer, or 0 if none
* whatrtn: name of the calling routine if failure should cause fatal error
*
* return 0 for realloc failure, !=0 for success
*/
{
if (minlen > *psiz) {
char *tbuf;
int rminlen = quantum ? minlen % quantum : 0;
int boff = pbptr ? *pbptr - *pbuf : 0;
/* round up to next multiple of quantum */
if (rminlen)
minlen += quantum - rminlen;
tbuf = (char *) realloc(*pbuf, minlen);
dprintf( ("adjbuf %s: %d %d (pbuf=%p, tbuf=%p)\n", whatrtn, *psiz, minlen, (void *) *pbuf, (void *) tbuf) );
if (tbuf == NULL) {
if (whatrtn)
FATAL("out of memory in %s", whatrtn);
return 0;
}
*pbuf = tbuf;
*psiz = minlen;
if (pbptr)
*pbptr = tbuf + boff;
}
return 1;
}
void run(Node *a) /* execution of parse tree starts here */
{
extern void stdinit(void);
stdinit();
execute(a);
closeall();
}
Cell *execute(Node *u) /* execute a node of the parse tree */
{
Cell *(*proc)(Node **, int);
Cell *x;
Node *a;
if (u == NULL)
return(True);
for (a = u; ; a = a->nnext) {
curnode = a;
if (isvalue(a)) {
x = (Cell *) (a->narg[0]);
if (isfld(x) && !donefld)
fldbld();
else if (isrec(x) && !donerec)
recbld();
return(x);
}
if (notlegal(a->nobj)) /* probably a Cell* but too risky to print */
FATAL("illegal statement");
proc = proctab[a->nobj-FIRSTTOKEN];
x = (*proc)(a->narg, a->nobj);
if (isfld(x) && !donefld)
fldbld();
else if (isrec(x) && !donerec)
recbld();
if (isexpr(a))
return(x);
if (isjump(x))
return(x);
if (a->nnext == NULL)
return(x);
tempfree(x);
}
}
Cell *program(Node **a, int n) /* execute an awk program */
{ /* a[0] = BEGIN, a[1] = body, a[2] = END */
Cell *x;
if (setjmp(env) != 0)
goto ex;
if (a[0]) { /* BEGIN */
x = execute(a[0]);
if (isexit(x))
return(True);
if (isjump(x))
FATAL("illegal break, continue, next or nextfile from BEGIN");
tempfree(x);
}
if (a[1] || a[2])
while (getrec(&record, &recsize, 1) > 0) {
x = execute(a[1]);
if (isexit(x))
break;
tempfree(x);
}
ex:
if (setjmp(env) != 0) /* handles exit within END */
goto ex1;
if (a[2]) { /* END */
x = execute(a[2]);
if (isbreak(x) || isnext(x) || iscont(x))
FATAL("illegal break, continue, next or nextfile from END");
tempfree(x);
}
ex1:
return(True);
}
struct Frame { /* stack frame for awk function calls */
int nargs; /* number of arguments in this call */
Cell *fcncell; /* pointer to Cell for function */
Cell **args; /* pointer to array of arguments after execute */
Cell *retval; /* return value */
};
#define NARGS 50 /* max args in a call */
struct Frame *frame = NULL; /* base of stack frames; dynamically allocated */
int nframe = 0; /* number of frames allocated */
struct Frame *fp = NULL; /* frame pointer. bottom level unused */
Cell *call(Node **a, int n) /* function call. very kludgy and fragile */
{
static Cell newcopycell = { OCELL, CCOPY, 0, "", 0.0, NUM|STR|DONTFREE, NULL };
int i, ncall, ndef;
int freed = 0; /* handles potential double freeing when fcn & param share a tempcell */
Node *x;
Cell *args[NARGS], *oargs[NARGS]; /* BUG: fixed size arrays */
Cell *y, *z, *fcn;
char *s;
fcn = execute(a[0]); /* the function itself */
s = fcn->nval;
if (!isfcn(fcn))
FATAL("calling undefined function %s", s);
if (frame == NULL) {
fp = frame = (struct Frame *) calloc(nframe += 100, sizeof(struct Frame));
if (frame == NULL)
FATAL("out of space for stack frames calling %s", s);
}
for (ncall = 0, x = a[1]; x != NULL; x = x->nnext) /* args in call */
ncall++;
ndef = (int) fcn->fval; /* args in defn */
dprintf( ("calling %s, %d args (%d in defn), fp=%d\n", s, ncall, ndef, (int) (fp-frame)) );
if (ncall > ndef)
WARNING("function %s called with %d args, uses only %d",
s, ncall, ndef);
if (ncall + ndef > NARGS)
FATAL("function %s has %d arguments, limit %d", s, ncall+ndef, NARGS);
for (i = 0, x = a[1]; x != NULL; i++, x = x->nnext) { /* get call args */
dprintf( ("evaluate args[%d], fp=%d:\n", i, (int) (fp-frame)) );
y = execute(x);
oargs[i] = y;
dprintf( ("args[%d]: %s %f <%s>, t=%o\n",
i, NN(y->nval), y->fval, isarr(y) ? "(array)" : NN(y->sval), y->tval) );
if (isfcn(y))
FATAL("can't use function %s as argument in %s", y->nval, s);
if (isarr(y))
args[i] = y; /* arrays by ref */
else
args[i] = copycell(y);
tempfree(y);
}
for ( ; i < ndef; i++) { /* add null args for ones not provided */
args[i] = gettemp();
*args[i] = newcopycell;
}
fp++; /* now ok to up frame */
if (fp >= frame + nframe) {
int dfp = fp - frame; /* old index */
frame = (struct Frame *)
realloc((char *) frame, (nframe += 100) * sizeof(struct Frame));
if (frame == NULL)
FATAL("out of space for stack frames in %s", s);
fp = frame + dfp;
}
fp->fcncell = fcn;
fp->args = args;
fp->nargs = ndef; /* number defined with (excess are locals) */
fp->retval = gettemp();
dprintf( ("start exec of %s, fp=%d\n", s, (int) (fp-frame)) );
y = execute((Node *)(fcn->sval)); /* execute body */
dprintf( ("finished exec of %s, fp=%d\n", s, (int) (fp-frame)) );
for (i = 0; i < ndef; i++) {
Cell *t = fp->args[i];
if (isarr(t)) {
if (t->csub == CCOPY) {
if (i >= ncall) {
freesymtab(t);
t->csub = CTEMP;
tempfree(t);
} else {
oargs[i]->tval = t->tval;
oargs[i]->tval &= ~(STR|NUM|DONTFREE);
oargs[i]->sval = t->sval;
tempfree(t);
}
}
} else if (t != y) { /* kludge to prevent freeing twice */
t->csub = CTEMP;
tempfree(t);
} else if (t == y && t->csub == CCOPY) {
t->csub = CTEMP;
tempfree(t);
freed = 1;
}
}
tempfree(fcn);
if (isexit(y) || isnext(y))
return y;
if (freed == 0) {
tempfree(y); /* don't free twice! */
}
z = fp->retval; /* return value */
dprintf( ("%s returns %g |%s| %o\n", s, getfval(z), getsval(z), z->tval) );
fp--;
return(z);
}
Cell *copycell(Cell *x) /* make a copy of a cell in a temp */
{
Cell *y;
/* copy is not constant or field */
y = gettemp();
y->tval = x->tval & ~(CON|FLD|REC);
y->csub = CCOPY; /* prevents freeing until call is over */
y->nval = x->nval; /* BUG? */
if (isstr(x) /* || x->ctype == OCELL */) {
y->sval = tostring(x->sval);
y->tval &= ~DONTFREE;
} else
y->tval |= DONTFREE;
y->fval = x->fval;
return y;
}
Cell *arg(Node **a, int n) /* nth argument of a function */
{
n = ptoi(a[0]); /* argument number, counting from 0 */
dprintf( ("arg(%d), fp->nargs=%d\n", n, fp->nargs) );
if (n+1 > fp->nargs)
FATAL("argument #%d of function %s was not supplied",
n+1, fp->fcncell->nval);
return fp->args[n];
}
Cell *jump(Node **a, int n) /* break, continue, next, nextfile, return */
{
Cell *y;
switch (n) {
case EXIT:
if (a[0] != NULL) {
y = execute(a[0]);
errorflag = (int) getfval(y);
tempfree(y);
}
longjmp(env, 1);
case RETURN:
if (a[0] != NULL) {
y = execute(a[0]);
if ((y->tval & (STR|NUM)) == (STR|NUM)) {
setsval(fp->retval, getsval(y));
fp->retval->fval = getfval(y);
fp->retval->tval |= NUM;
}
else if (y->tval & STR)
setsval(fp->retval, getsval(y));
else if (y->tval & NUM)
setfval(fp->retval, getfval(y));
else /* can't happen */
FATAL("bad type variable %d", y->tval);
tempfree(y);
}
return(jret);
case NEXT:
return(jnext);
case NEXTFILE:
nextfile();
return(jnextfile);
case BREAK:
return(jbreak);
case CONTINUE:
return(jcont);
default: /* can't happen */
FATAL("illegal jump type %d", n);
}
return 0; /* not reached */
}
Cell *awkgetline(Node **a, int n) /* get next line from specific input */
{ /* a[0] is variable, a[1] is operator, a[2] is filename */
Cell *r, *x;
extern Cell **fldtab;
FILE *fp;
char *buf;
int bufsize = recsize;
int mode;
if ((buf = (char *) malloc(bufsize)) == NULL)
FATAL("out of memory in getline");
fflush(stdout); /* in case someone is waiting for a prompt */
r = gettemp();
if (a[1] != NULL) { /* getline < file */
x = execute(a[2]); /* filename */
mode = ptoi(a[1]);
if (mode == '|') /* input pipe */
mode = LE; /* arbitrary flag */
fp = openfile(mode, getsval(x));
tempfree(x);
if (fp == NULL)
n = -1;
else
n = readrec(&buf, &bufsize, fp);
if (n <= 0) {
;
} else if (a[0] != NULL) { /* getline var <file */
x = execute(a[0]);
setsval(x, buf);
if (is_number(x->sval)) {
x->fval = atof(x->sval);
x->tval |= NUM;
}
tempfree(x);
} else { /* getline <file */
setsval(fldtab[0], buf);
if (is_number(fldtab[0]->sval)) {
fldtab[0]->fval = atof(fldtab[0]->sval);
fldtab[0]->tval |= NUM;
}
}
} else { /* bare getline; use current input */
if (a[0] == NULL) /* getline */
n = getrec(&record, &recsize, 1);
else { /* getline var */
n = getrec(&buf, &bufsize, 0);
x = execute(a[0]);
setsval(x, buf);
if (is_number(x->sval)) {
x->fval = atof(x->sval);
x->tval |= NUM;
}
tempfree(x);
}
}
setfval(r, (Awkfloat) n);
free(buf);
return r;
}
Cell *getnf(Node **a, int n) /* get NF */
{
if (donefld == 0)
fldbld();
return (Cell *) a[0];
}
Cell *array(Node **a, int n) /* a[0] is symtab, a[1] is list of subscripts */
{
Cell *x, *y, *z;
char *s;
Node *np;
char *buf;
int bufsz = recsize;
int nsub;
if ((buf = (char *) malloc(bufsz)) == NULL)
FATAL("out of memory in array");
x = execute(a[0]); /* Cell* for symbol table */
buf[0] = 0;
for (np = a[1]; np; np = np->nnext) {
y = execute(np); /* subscript */
s = getsval(y);
nsub = strlen(getsval(subseploc));
if (!adjbuf(&buf, &bufsz, strlen(buf)+strlen(s)+nsub+1, recsize, 0, "array"))
FATAL("out of memory for %s[%s...]", x->nval, buf);
strcat(buf, s);
if (np->nnext)
strcat(buf, *SUBSEP);
tempfree(y);
}
if (!isarr(x)) {
dprintf( ("making %s into an array\n", NN(x->nval)) );
if (freeable(x))
xfree(x->sval);
x->tval &= ~(STR|NUM|DONTFREE);
x->tval |= ARR;
x->sval = (char *) makesymtab(NSYMTAB);
}
z = setsymtab(buf, "", 0.0, STR|NUM, (Array *) x->sval);
z->ctype = OCELL;
z->csub = CVAR;
tempfree(x);
free(buf);
return(z);
}
Cell *awkdelete(Node **a, int n) /* a[0] is symtab, a[1] is list of subscripts */
{
Cell *x, *y;
Node *np;
char *s;
int nsub;
x = execute(a[0]); /* Cell* for symbol table */
if (x == symtabloc) {
FATAL("cannot delete SYMTAB or its elements");
}
if (!isarr(x))
return True;
if (a[1] == 0) { /* delete the elements, not the table */
freesymtab(x);
x->tval &= ~STR;
x->tval |= ARR;
x->sval = (char *) makesymtab(NSYMTAB);
} else {
int bufsz = recsize;
char *buf;
if ((buf = (char *) malloc(bufsz)) == NULL)
FATAL("out of memory in adelete");
buf[0] = 0;
for (np = a[1]; np; np = np->nnext) {
y = execute(np); /* subscript */
s = getsval(y);
nsub = strlen(getsval(subseploc));
if (!adjbuf(&buf, &bufsz, strlen(buf)+strlen(s)+nsub+1, recsize, 0, "awkdelete"))
FATAL("out of memory deleting %s[%s...]", x->nval, buf);
strcat(buf, s);
if (np->nnext)
strcat(buf, *SUBSEP);
tempfree(y);
}
freeelem(x, buf);
free(buf);
}
tempfree(x);
return True;
}
Cell *intest(Node **a, int n) /* a[0] is index (list), a[1] is symtab */
{
Cell *x, *ap, *k;
Node *p;
char *buf;
char *s;
int bufsz = recsize;
int nsub;
ap = execute(a[1]); /* array name */
if (!isarr(ap)) {
dprintf( ("making %s into an array\n", ap->nval) );
if (freeable(ap))
xfree(ap->sval);
ap->tval &= ~(STR|NUM|DONTFREE);
ap->tval |= ARR;
ap->sval = (char *) makesymtab(NSYMTAB);
}
if ((buf = (char *) malloc(bufsz)) == NULL) {
FATAL("out of memory in intest");
}
buf[0] = 0;
for (p = a[0]; p; p = p->nnext) {
x = execute(p); /* expr */
s = getsval(x);
nsub = strlen(getsval(subseploc));
if (!adjbuf(&buf, &bufsz, strlen(buf)+strlen(s)+nsub+1, recsize, 0, "intest"))
FATAL("out of memory deleting %s[%s...]", x->nval, buf);
strcat(buf, s);
tempfree(x);
if (p->nnext)
strcat(buf, *SUBSEP);
}
k = lookup(buf, (Array *) ap->sval);
tempfree(ap);
free(buf);
if (k == NULL)
return(False);
else
return(True);
}
Cell *matchop(Node **a, int n) /* ~ and match() */
{
Cell *x, *y;
char *s, *t;
int i;
fa *pfa;
int (*mf)(fa *, const char *) = match, mode = 0;
if (n == MATCHFCN) {
mf = pmatch;
mode = 1;
}
x = execute(a[1]); /* a[1] = target text */
s = getsval(x);
if (a[0] == 0) /* a[1] == 0: already-compiled reg expr */
i = (*mf)((fa *) a[2], s);
else {
y = execute(a[2]); /* a[2] = regular expr */
t = getsval(y);
pfa = makedfa(t, mode);
i = (*mf)(pfa, s);
tempfree(y);
}
tempfree(x);
if (n == MATCHFCN) {
int start = patbeg - s + 1;
if (patlen < 0)
start = 0;
setfval(rstartloc, (Awkfloat) start);
setfval(rlengthloc, (Awkfloat) patlen);
x = gettemp();
x->tval = NUM;
x->fval = start;
return x;
} else if ((n == MATCH && i == 1) || (n == NOTMATCH && i == 0))
return(True);
else
return(False);
}
Cell *boolop(Node **a, int n) /* a[0] || a[1], a[0] && a[1], !a[0] */
{
Cell *x, *y;
int i;
x = execute(a[0]);
i = istrue(x);
tempfree(x);
switch (n) {
case BOR:
if (i) return(True);
y = execute(a[1]);
i = istrue(y);
tempfree(y);
if (i) return(True);
else return(False);
case AND:
if ( !i ) return(False);
y = execute(a[1]);
i = istrue(y);
tempfree(y);
if (i) return(True);
else return(False);
case NOT:
if (i) return(False);
else return(True);
default: /* can't happen */
FATAL("unknown boolean operator %d", n);
}
return 0; /*NOTREACHED*/
}
Cell *relop(Node **a, int n) /* a[0 < a[1], etc. */
{
int i;
Cell *x, *y;
Awkfloat j;
x = execute(a[0]);
y = execute(a[1]);
if (x->tval&NUM && y->tval&NUM) {
j = x->fval - y->fval;
i = j<0? -1: (j>0? 1: 0);
} else {
i = strcmp(getsval(x), getsval(y));
}
tempfree(x);
tempfree(y);
switch (n) {
case LT: if (i<0) return(True);
else return(False);
case LE: if (i<=0) return(True);
else return(False);
case NE: if (i!=0) return(True);
else return(False);
case EQ: if (i == 0) return(True);
else return(False);
case GE: if (i>=0) return(True);
else return(False);
case GT: if (i>0) return(True);
else return(False);
default: /* can't happen */
FATAL("unknown relational operator %d", n);
}
return 0; /*NOTREACHED*/
}
void tfree(Cell *a) /* free a tempcell */
{
if (freeable(a)) {
dprintf( ("freeing %s %s %o\n", NN(a->nval), NN(a->sval), a->tval) );
xfree(a->sval);
}
if (a == tmps)
FATAL("tempcell list is curdled");
a->cnext = tmps;
tmps = a;
}
Cell *gettemp(void) /* get a tempcell */
{ int i;
Cell *x;
if (!tmps) {
tmps = (Cell *) calloc(100, sizeof(Cell));
if (!tmps)
FATAL("out of space for temporaries");
for(i = 1; i < 100; i++)
tmps[i-1].cnext = &tmps[i];
tmps[i-1].cnext = 0;
}
x = tmps;
tmps = x->cnext;
*x = tempcell;
return(x);
}
Cell *indirect(Node **a, int n) /* $( a[0] ) */
{
Awkfloat val;
Cell *x;
int m;
char *s;
x = execute(a[0]);
val = getfval(x); /* freebsd: defend against super large field numbers */
if ((Awkfloat)INT_MAX < val)
FATAL("trying to access out of range field %s", x->nval);
m = (int) val;
if (m == 0 && !is_number(s = getsval(x))) /* suspicion! */
FATAL("illegal field $(%s), name \"%s\"", s, x->nval);
/* BUG: can x->nval ever be null??? */
tempfree(x);
x = fieldadr(m);
x->ctype = OCELL; /* BUG? why are these needed? */
x->csub = CFLD;
return(x);
}
Cell *substr(Node **a, int nnn) /* substr(a[0], a[1], a[2]) */
{
int k, m, n;
char *s;
int temp;
Cell *x, *y, *z = 0;
x = execute(a[0]);
y = execute(a[1]);
if (a[2] != 0)
z = execute(a[2]);
s = getsval(x);
k = strlen(s) + 1;
if (k <= 1) {
tempfree(x);
tempfree(y);
if (a[2] != 0) {
tempfree(z);
}
x = gettemp();
setsval(x, "");
return(x);
}
m = (int) getfval(y);
if (m <= 0)
m = 1;
else if (m > k)
m = k;
tempfree(y);
if (a[2] != 0) {
n = (int) getfval(z);
tempfree(z);
} else
n = k - 1;
if (n < 0)
n = 0;
else if (n > k - m)
n = k - m;
dprintf( ("substr: m=%d, n=%d, s=%s\n", m, n, s) );
y = gettemp();
temp = s[n+m-1]; /* with thanks to John Linderman */
s[n+m-1] = '\0';
setsval(y, s + m - 1);
s[n+m-1] = temp;
tempfree(x);
return(y);
}
Cell *sindex(Node **a, int nnn) /* index(a[0], a[1]) */
{
Cell *x, *y, *z;
char *s1, *s2, *p1, *p2, *q;
Awkfloat v = 0.0;
x = execute(a[0]);
s1 = getsval(x);
y = execute(a[1]);
s2 = getsval(y);
z = gettemp();
for (p1 = s1; *p1 != '\0'; p1++) {
for (q=p1, p2=s2; *p2 != '\0' && *q == *p2; q++, p2++)
;
if (*p2 == '\0') {
v = (Awkfloat) (p1 - s1 + 1); /* origin 1 */
break;
}
}
tempfree(x);
tempfree(y);
setfval(z, v);
return(z);
}
#define MAXNUMSIZE 50
int format(char **pbuf, int *pbufsize, const char *s, Node *a) /* printf-like conversions */
{
char *fmt;
char *p, *t;
const char *os;
Cell *x;
int flag = 0, n;
int fmtwd; /* format width */
int fmtsz = recsize;
char *buf = *pbuf;
int bufsize = *pbufsize;
static int first = 1;
static int have_a_format = 0;
if (first) {
char buf[100];
sprintf(buf, "%a", 42.0);
have_a_format = (strcmp(buf, "0x1.5p+5") == 0);
first = 0;
}
os = s;
p = buf;
if ((fmt = (char *) malloc(fmtsz)) == NULL)
FATAL("out of memory in format()");
while (*s) {
adjbuf(&buf, &bufsize, MAXNUMSIZE+1+p-buf, recsize, &p, "format1");
if (*s != '%') {
*p++ = *s++;
continue;
}
if (*(s+1) == '%') {
*p++ = '%';
s += 2;
continue;
}
/* have to be real careful in case this is a huge number, eg, %100000d */
fmtwd = atoi(s+1);
if (fmtwd < 0)
fmtwd = -fmtwd;
adjbuf(&buf, &bufsize, fmtwd+1+p-buf, recsize, &p, "format2");
for (t = fmt; (*t++ = *s) != '\0'; s++) {
if (!adjbuf(&fmt, &fmtsz, MAXNUMSIZE+1+t-fmt, recsize, &t, "format3"))
FATAL("format item %.30s... ran format() out of memory", os);
if (isalpha((uschar)*s) && *s != 'l' && *s != 'h' && *s != 'L')
break; /* the ansi panoply */
if (*s == '$') {
FATAL("'$' not permitted in awk formats");
}
if (*s == '*') {
if (a == NULL) {
FATAL("not enough args in printf(%s)", os);
}
x = execute(a);
a = a->nnext;
sprintf(t-1, "%d", fmtwd=(int) getfval(x));
if (fmtwd < 0)
fmtwd = -fmtwd;
adjbuf(&buf, &bufsize, fmtwd+1+p-buf, recsize, &p, "format");
t = fmt + strlen(fmt);
tempfree(x);
}
}
*t = '\0';
if (fmtwd < 0)
fmtwd = -fmtwd;
adjbuf(&buf, &bufsize, fmtwd+1+p-buf, recsize, &p, "format4");
switch (*s) {
case 'a': case 'A':
if (have_a_format)
flag = *s;
else
flag = 'f';
break;
case 'f': case 'e': case 'g': case 'E': case 'G':
flag = 'f';
break;
case 'd': case 'i':
flag = 'd';
if(*(s-1) == 'l') break;
*(t-1) = 'l';
*t = 'd';
*++t = '\0';
break;
case 'o': case 'x': case 'X': case 'u':
flag = *(s-1) == 'l' ? 'd' : 'u';
break;
case 's':
flag = 's';
break;
case 'c':
flag = 'c';
break;
default:
WARNING("weird printf conversion %s", fmt);
flag = '?';
break;
}
if (a == NULL)
FATAL("not enough args in printf(%s)", os);
x = execute(a);
a = a->nnext;
n = MAXNUMSIZE;
if (fmtwd > n)
n = fmtwd;
adjbuf(&buf, &bufsize, 1+n+p-buf, recsize, &p, "format5");
switch (flag) {
case '?': sprintf(p, "%s", fmt); /* unknown, so dump it too */
t = getsval(x);
n = strlen(t);
if (fmtwd > n)
n = fmtwd;
adjbuf(&buf, &bufsize, 1+strlen(p)+n+p-buf, recsize, &p, "format6");
p += strlen(p);
sprintf(p, "%s", t);
break;
case 'a':
case 'A':
case 'f': sprintf(p, fmt, getfval(x)); break;
case 'd': sprintf(p, fmt, (long) getfval(x)); break;
case 'u': sprintf(p, fmt, (int) getfval(x)); break;
case 's':
t = getsval(x);
n = strlen(t);
if (fmtwd > n)
n = fmtwd;
if (!adjbuf(&buf, &bufsize, 1+n+p-buf, recsize, &p, "format7"))
FATAL("huge string/format (%d chars) in printf %.30s... ran format() out of memory", n, t);
sprintf(p, fmt, t);
break;
case 'c':
if (isnum(x)) {
if (getfval(x))
sprintf(p, fmt, (int) getfval(x));
else {
*p++ = '\0'; /* explicit null byte */
*p = '\0'; /* next output will start here */
}
} else
sprintf(p, fmt, getsval(x)[0]);
break;
default:
FATAL("can't happen: bad conversion %c in format()", flag);
}
tempfree(x);
p += strlen(p);
s++;
}
*p = '\0';
free(fmt);
for ( ; a; a = a->nnext) /* evaluate any remaining args */
execute(a);
*pbuf = buf;
*pbufsize = bufsize;
return p - buf;
}
Cell *awksprintf(Node **a, int n) /* sprintf(a[0]) */
{
Cell *x;
Node *y;
char *buf;
int bufsz=3*recsize;
if ((buf = (char *) malloc(bufsz)) == NULL)
FATAL("out of memory in awksprintf");
y = a[0]->nnext;
x = execute(a[0]);
if (format(&buf, &bufsz, getsval(x), y) == -1)
FATAL("sprintf string %.30s... too long. can't happen.", buf);
tempfree(x);