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PRINT.C
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1991-12-18
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/********************************************
print.c
copyright 1991, Michael D. Brennan
This is a source file for mawk, an implementation of
the AWK programming language.
Mawk is distributed without warranty under the terms of
the GNU General Public License, version 2, 1991.
********************************************/
/* $Log: print.c,v $
* Revision 5.1 91/12/05 07:56:22 brennan
* 1.1 pre-release
*
*/
#include "mawk.h"
#include "bi_vars.h"
#include "bi_funct.h"
#include "memory.h"
#include "field.h"
#include "scan.h"
#include "files.h"
static void PROTO( print_cell, (CELL *, FILE *) ) ;
static STRING* PROTO( do_printf, (FILE *, char *, unsigned, CELL *) ) ;
static void PROTO( arg_error, (char *, char *, char *) ) ;
static void PROTO( bad_conversion, (int, char *, char *)) ;
/* this can be moved and enlarged by -W sprintf=num */
char *sprintf_buff = string_buff ;
char *sprintf_limit = string_buff + SPRINTF_SZ ;
static void print_cell(p, fp)
register CELL *p ;
register FILE *fp ;
{ register int len ;
switch( p->type )
{
case C_NOINIT : break ;
case C_MBSTRN :
case C_STRING :
case C_STRNUM :
switch( len = string(p)->len )
{
case 0 : break ;
case 1 :
putc(string(p)->str[0],fp) ;
break ;
default :
fwrite(string(p)->str, SIZE_T(1), SIZE_T(len), fp) ;
}
break ;
case C_DOUBLE :
if ( (double)(len = (int) p->dval) == p->dval )
fprintf(fp, "%d", len) ;
else
fprintf(fp, string(OFMT)->str, p->dval) ;
break ;
default :
bozo("bad cell passed to print_cell") ;
}
}
/* on entry to bi_print or bi_printf the stack is:
sp[0] = an integer k
if ( k < 0 ) output is to a file with name in sp[-1]
{ so open file and sp -= 2 }
sp[0] = k >= 0 is the number of print args
sp[-k] holds the first argument
*/
CELL *bi_print(sp)
CELL *sp ; /* stack ptr passed in */
{ register CELL *p ;
register int k ;
FILE *fp ;
if ( (k = sp->type) < 0 )
{ if ( (--sp)->type < C_STRING ) cast1_to_s(sp) ;
fp = (FILE *) file_find( string(sp), k ) ;
free_STRING(string(sp)) ;
k = (--sp)->type ;
}
else fp = stdout ;
if ( k )
{ p = sp - k ; /* clear k variables off the stack */
sp = p - 1 ;
while ( k-- > 1 )
{ print_cell(p,fp) ; print_cell(OFS,fp) ;
cell_destroy(p) ; p++ ; }
print_cell(p, fp) ; cell_destroy(p) ;
}
else
{ sp-- ;
print_cell( &field[0], fp ) ; }
print_cell(ORS , fp) ;
return sp ;
}
/*---------- types and defs for doing printf and sprintf----*/
#define PF_C 0
#define PF_S 1
#define PF_D 2 /* int conversion */
#define PF_LD 3 /* long int */
#define PF_F 4 /* float conversion */
/* for switch on number of '*' and type */
#define AST(num,type) (5*(num)+(type))
/* some picky ANSI compilers go berserk without this */
#if HAVE_PROTOS
typedef int (*PRINTER)(PTR,char *,...) ;
#else
typedef int (*PRINTER)() ;
#endif
/*-------------------------------------------------------*/
static void arg_error( few_or_many, who, format)
char *few_or_many , *who, *format ;
{
rt_error("too %s arguments passed to %s(\"%s\")",
few_or_many, who, format) ;
}
static void bad_conversion(cnt, who, format)
int cnt ;
char *who , *format ;
{
rt_error( "improper conversion(number %d) in %s(\"%s\")",
cnt, who, format ) ;
}
/* the contents of format are preserved,
caller does CELL cleanup
This routine does both printf and sprintf (if fp==0)
*/
static STRING *do_printf( fp, format, argcnt, cp)
FILE *fp ;
char *format ;
CELL *cp ; /* ptr to an array of arguments ( on the eval stack) */
unsigned argcnt ; /* number of args on eval stack */
{
char save ;
char *p ;
register char *q = format ;
register char *target ;
int l_flag , h_flag ; /* seen %ld or %hd */
int ast_cnt ;
int ast[2] ;
long lval ;
int ival ; /* caters to MSDOS */
int num_conversion = 0 ; /* for error messages */
char *who ; /*ditto*/
int pf_type ; /* conversion type */
PRINTER printer ; /* pts at fprintf() or sprintf() */
if ( fp == (FILE *) 0 ) /* doing sprintf */
{
target = sprintf_buff ;
printer = (PRINTER) sprintf ;
who = "sprintf" ;
}
else /* doing printf */
{
target = (char *) fp ; /* will never change */
printer = (PRINTER) fprintf ;
who = "printf" ;
}
while ( 1 )
{
if ( fp )
{
while ( *q != '%' )
if ( *q == 0 )
if ( argcnt == 0 ) return (STRING *) 0 ;
else arg_error("many", who, format) ;
else
{ putc(*q,fp) ; q++ ; }
}
else
{
while ( *q != '%' )
if ( *q == 0 )
if ( argcnt == 0 ) /* done */
if ( target > sprintf_limit ) /* damaged */
{
/* hope this works */
rt_overflow("sprintf buffer",
sprintf_limit - sprintf_buff) ;
}
else /* really done */
{
STRING *retval ;
int len = target - sprintf_buff ;
retval = new_STRING((char*)0, len) ;
(void)memcpy(retval->str, sprintf_buff, SIZE_T(len)) ;
return retval ;
}
else arg_error("many", who, format) ;
else *target++ = *q++ ;
}
num_conversion++ ;
if ( * ++q == '%' ) /* %% */
{
if ( fp ) putc(*q, fp) ;
else *target++ = *q ;
q++ ; continue ;
}
/* mark the '%' with p */
p = q-1 ;
/* eat the flags */
while ( *q == '-' || *q == '+' || *q == ' ' ||
*q == '#' || *q == '0' ) q++ ;
ast_cnt = 0 ;
if ( *q == '*' )
{
if ( cp->type != C_DOUBLE ) cast1_to_d(cp) ;
ast[ast_cnt++] = (int) cp++ ->dval ;
argcnt-- ; q++ ;
}
else
while ( scan_code[*(unsigned char *)q] == SC_DIGIT ) q++ ;
/* width is done */
if ( *q == '.' ) /* have precision */
{ q++ ;
if ( *q == '*' )
{
if ( cp->type != C_DOUBLE ) cast1_to_d(cp) ;
ast[ast_cnt++] = (int) cp++ ->dval ;
argcnt-- ; q++ ;
}
else
while ( scan_code[*(unsigned char*)q] == SC_DIGIT ) q++ ;
}
if ( argcnt <= 0 ) arg_error("few", who, format) ;
l_flag = h_flag = 0 ;
if ( *q == 'l' ) { q++ ; l_flag = 1 ; }
#if HAVE_PRINTF_HD
else
if ( *q == 'h' ) { q++ ; h_flag = 1 ; }
#endif
switch( *q++ )
{
case 's' :
if ( l_flag + h_flag )
bad_conversion(num_conversion,who,format) ;
if ( cp->type < C_STRING ) cast1_to_s(cp) ;
pf_type = PF_S ;
break ;
case 'c' :
if ( l_flag + h_flag )
bad_conversion(num_conversion,who,format) ;
switch( cp->type )
{
case C_NOINIT :
ival = 0 ;
break ;
case C_STRNUM :
case C_DOUBLE :
ival = (int) cp->dval ;
break ;
case C_STRING :
ival = string(cp)->str[0] ;
break ;
case C_MBSTRN :
check_strnum(cp) ;
ival = cp->type == C_STRING ?
string(cp)->str[0] : (int) cp->dval ;
break ;
default :
bozo("printf %c") ;
}
pf_type = PF_C ;
break ;
case 'd' :
case 'o' :
case 'x' :
case 'X' :
case 'i' :
case 'u' :
if ( cp->type != C_DOUBLE ) cast1_to_d(cp) ;
lval = (long) cp->dval ;
#if HAVE_PRINTF_HD
if ( h_flag ) lval &= 0xffff ;
#endif
pf_type = l_flag ? PF_LD : PF_D ;
break ;
case 'e' :
case 'g' :
case 'f' :
case 'E' :
case 'G' :
if ( h_flag + l_flag )
bad_conversion(num_conversion,who,format) ;
if ( cp->type != C_DOUBLE ) cast1_to_d(cp) ;
pf_type = PF_F ;
break ;
default : bad_conversion(num_conversion,who,format) ;
}
save = *q ;
*q = 0 ;