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print.c
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print.c
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/********************************************
print.c
copyright 2008-2023,2024. Thomas E. Dickey
copyright 1991-1996,2014. 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.
********************************************/
/*
* $MawkId: print.c,v 1.52 2024/08/25 17:03:28 tom Exp $
*/
#define Visible_BI_REC
#define Visible_CELL
#define Visible_STRING
#include <mawk.h>
#include <bi_vars.h>
#include <bi_funct.h>
#include <memory.h>
#include <field.h>
#include <scan.h>
#include <files.h>
#include <init.h>
#ifdef USE_LL_FORMAT
#define ELL_LIMIT 2
#define SpliceFormat(n) splice = 1
#else
#define ELL_LIMIT 1
#define SpliceFormat(n) if (n) splice = 1
#endif
#define CopySplice(dst,src) \
{ \
size_t pp; \
for (pp = 0; (pp < sizeof(dst) - 1) && (src[pp] != 0); ++pp) \
dst[pp] = src[pp]; \
dst[pp] = 0; \
}
#ifdef SHORT_INTS
#define MY_FMT xbuff /* format in xbuff */
#else
#define MY_FMT p /* p -> format */
#endif
static void write_error(void);
/* this can be moved and enlarged by -W sprintf=num */
char *sprintf_buff = string_buff;
char *sprintf_limit = string_buff + sizeof(string_buff);
/* Once execute() starts the sprintf code is (belatedly) the only
code allowed to use string_buff */
static void
print_cell(CELL *p, FILE *fp)
{
size_t 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, len, fp);
}
break;
case C_DOUBLE:
if (p->dval >= (double) Max_Long) {
ULong ival = d_to_UL(p->dval);
/* integers can print as "%[l]u", for additional range */
if ((double) ival == p->dval)
fprintf(fp, ULONG_FMT, ival);
else
fprintf(fp, string(OFMT)->str, p->dval);
} else {
Long ival = d_to_L(p->dval);
/* integers print as "%[l]d" */
if ((double) ival == p->dval)
fprintf(fp, LONG_FMT, ival);
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(CELL *sp) /* stack ptr passed in */
{
register CELL *p;
register int k;
FILE *fp;
k = sp->type;
if (k < 0) {
/* k holds redirection */
if ((--sp)->type < C_STRING)
cast1_to_s(sp);
fp = (FILE *) file_find(string(sp), k);
free_STRING(string(sp));
k = (--sp)->type;
/* k now has number of arguments */
} else
fp = stdout;
if (k) {
p = sp - k; /* clear k variables off the stack */
sp = p - 1;
k--;
while (k > 0) {
print_cell(p, fp);
print_cell(OFS, fp);
cell_destroy(p);
p++;
k--;
}
print_cell(p, fp);
cell_destroy(p);
} else { /* print $0 */
sp--;
print_cell(&field[0], fp);
}
print_cell(ORS, fp);
if (ferror(fp))
write_error();
return sp;
}
/*---------- types and defs for doing printf and sprintf----*/
typedef enum {
PF_C = 0, /* %c */
PF_S, /* %s */
PF_D, /* int conversion */
PF_F, /* float conversion */
PF_U, /* unsigned conversion */
PF_last
} PF_enum;
/* for switch on number of '*' and type */
#define AST(num,type) ((PF_last)*(num)+(type))
/*-------------------------------------------------------*/
static void
bad_conversion(int cnt, const char *who, const char *format)
{
rt_error("improper conversion(number %d) in %s(\"%s\")",
cnt, who, format);
}
typedef enum {
sfmtSPACE = 1,
sfmtMINUS = 2,
sfmtZEROS = 4,
sfmtWIDTH = 8,
sfmtPREC = 16
} enumSFMT;
/*
* nawk pads leading 0's if it sees a format such as "%06s".
* C's printf/sprintf do not do that.
* So we decode the format and interpret it according to nawk.
*/
static int
make_sfmt(const char *format,
const int *fill_in,
int *width,
int *prec,
int *flags)
{
int parts = 0;
int digits = 0;
int value = 0;
int used = 0;
int success = 1;
int ok_flag = 1;
*width = 0;
*prec = 0;
*flags = 0;
++format;
while (*format != '\0' && ok_flag) {
switch (*format++) {
case ' ':
*flags |= sfmtSPACE;
break;
case '-':
*flags |= sfmtMINUS;
break;
case '0':
*flags |= sfmtZEROS;
break;
case '+':
/* FALLTHRU */
case '#':
/* ignore for %s */
break;
default:
ok_flag = 0;
--format;
break;
}
}
while (*format != '\0' && success) {
int ch;
switch (ch = *format++) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (digits < 0) {
success = 0;
} else if (digits++ == 0) {
value = (ch - '0');
} else {
value = (10 * value) + (ch - '0');
}
break;
case '.':
if (parts) {
success = 0;
} else {
if (digits) {
*width = value;
*flags |= sfmtWIDTH;
digits = 0;
value = 0;
}
parts = 1;
}
break;
case '*':
if (digits == 0) {
value = fill_in[used++];
digits = -1;
} else {
success = 0;
}
break;
case 'c':
/* FALLTHRU */
case 's':
if (digits) {
if (parts) {
*prec = value;
*flags |= sfmtPREC;
} else {
*width = value;
*flags |= sfmtWIDTH;
}
}
if (*format != '\0')
success = 0;
break;
default:
success = 0;
break;
}
}
return success;
}
#define SprintfOverflow(bfr, need) \
if (bfr + need + 1 >= sprintf_limit) { \
rt_overflow("sprintf buffer", \
(unsigned) (sprintf_limit - sprintf_buff)); \
}
static char *
SprintfChar(char *buffer, int ch)
{
SprintfOverflow(buffer, 1);
*buffer++ = (char) ch;
return buffer;
}
static char *
SprintfFill(char *buffer, int ch, int fill)
{
SprintfOverflow(buffer, fill);
memset(buffer, ch, (size_t) fill);
return buffer + fill;
}
static char *
SprintfBlock(char *buffer, const char *source, int length)
{
SprintfOverflow(buffer, length);
memcpy(buffer, source, (size_t) length);
return buffer + length;
}
/*
* Write the s-format text.
*/
static void
stream_puts_sfmt(FILE *fp,
const char *src_str,
int src_len,
int width,
int prec,
int flags)
{
if (width < 0) {
width = -width;
flags |= sfmtMINUS;
}
if (flags & sfmtSPACE) {
if (src_len == 0)
fputc(' ', fp);
}
if (flags & sfmtPREC) {
if (src_len > prec)
src_len = prec;
}
if (!(flags & sfmtWIDTH)) {
width = src_len;
}
if (!(flags & sfmtMINUS)) {
while (src_len < width) {
fputc(' ', fp);
--width;
}
}
fwrite(src_str, sizeof(char), (size_t) src_len, fp);
while (src_len < width) {
fputc(' ', fp);
--width;
}
}
static PTR
buffer_puts_sfmt(char *target,
const char *src_str,
int src_len,
int width,
int prec,
int flags)
{
if (width < 0) {
width = -width;
flags |= sfmtMINUS;
}
if (flags & sfmtSPACE) {
if (src_len == 0) {
target = SprintfChar(target, ' ');
}
}
if (flags & sfmtPREC) {
if (src_len > prec)
src_len = prec;
}
if (!(flags & sfmtWIDTH)) {
width = src_len;
}
if (!(flags & sfmtMINUS)) {
if (src_len < width) {
target = SprintfFill(target, ' ', width - src_len);
width = src_len;
}
}
target = SprintfBlock(target, src_str, src_len);
if (src_len < width) {
target = SprintfFill(target, ' ', width - src_len);
}
return target;
}
/*
* Note: caller must do CELL cleanup.
* The format parameter is modified, but restored.
*/
static STRING *
do_printf(FILE *fp,
char *format,
unsigned argcnt, /* number of args on eval stack */
CELL *cp) /* ptr to an array of arguments
(on the eval stack) */
{
char save; /* saves when temporary null ends format */
int splice; /* set to pad format with l's for Long */
char *p;
register char *q = format;
int l_flag, h_flag; /* seen %ld or %hd */
int ast_cnt;
int ast[2];
ULong Uval = 0;
Long Ival = 0;
int sfmt_width, sfmt_prec, sfmt_flags;
int num_conversion = 0; /* for error messages */
const char *who = "printf"; /*ditto */
int pf_type = 0; /* conversion type */
STRING onechr;
char xbuff[256]; /* splice in l qualifier here */
while (1) {
while (*q != '%') {
if (*q == 0) {
if (ferror(fp))
write_error();
/* return is ignored */
return (STRING *) 0;
} else {
putc(*q, fp);
q++;
}
}
/* *q == '%' */
num_conversion++;
if (*++q == '%') { /* %% */
putc(*q, fp);
q++;
continue;
}
/* mark the '%' with p */
p = q - 1;
/* eat the flags */
while (*q == '-' || *q == '+' || *q == ' ' ||
*q == '#' || *q == '0' || *q == '\'')
q++;
ast_cnt = 0;
ast[0] = 0;
if (*q == '*') {
if (cp->type != C_DOUBLE)
cast1_to_d(cp);
ast[ast_cnt++] = d_to_i(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++] = d_to_i(cp++->dval);
argcnt--;
q++;
} else {
while (scan_code[*(unsigned char *) q] == SC_DIGIT)
q++;
}
}
if ((int) argcnt <= 0)
rt_error("not enough arguments passed to %s(\"%s\")",
who, format);
l_flag = h_flag = 0;
for (;;) {
if (*q == 'l') {
++q;
++l_flag;
} else if (*q == 'h') {
++q;
++h_flag;
} else {
break;
}
}
splice = 0;
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 = d_to_L(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]
: d_to_I(cp->dval));
break;
default:
bozo("printf %c");
}
onechr.len = 1;
onechr.str[0] = (char) Ival;
pf_type = PF_C;
break;
case 'd':
if (cp->type != C_DOUBLE)
cast1_to_d(cp);
if (cp->dval >= (double) Max_Long) {
Uval = d_to_UL(cp->dval);
pf_type = PF_U;
} else {
Ival = d_to_L(cp->dval);
pf_type = PF_D;
}
SpliceFormat(!l_flag || h_flag);
break;
case 'i':
if (cp->type != C_DOUBLE)
cast1_to_d(cp);
Ival = d_to_L(cp->dval);
pf_type = PF_D;
SpliceFormat(!l_flag || h_flag);
break;
case 'o':
case 'x':
case 'X':
case 'u':
if (cp->type != C_DOUBLE)
cast1_to_d(cp);
Uval = d_to_UL(cp->dval);
pf_type = PF_U;
SpliceFormat(!l_flag);
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);
}
#ifdef SHORT_INTS
if (pf_type == PF_D)
p = xbuff;
#endif
save = *q;
*q = 0;
if (splice) {
/* need to splice in long modifier */
CopySplice(xbuff, p);
if (l_flag < ELL_LIMIT) {
int k = (int) (q - p);
switch (h_flag) {
case 2:
Ival = (char) Ival;
if (pf_type == PF_D)
Ival &= 0xff;
break;
case 1:
Ival = (short) Ival;
if (pf_type == PF_D)
Ival &= 0xffff;
break;
default:
do {
xbuff[k] = xbuff[k - 1];
xbuff[k - 1] = 'l';
xbuff[++k] = 0;
} while (++l_flag < ELL_LIMIT);
if ((pf_type == PF_U) && (xbuff[k - 1] == 'd'))
xbuff[k - 1] = 'u';
break;
}
}
p = xbuff;
}
#define PUTS_C_ARGS fp, onechr.str, 1, sfmt_width, sfmt_prec, sfmt_flags
#define PUTS_S_ARGS fp, string(cp)->str, (int) string(cp)->len, sfmt_width, sfmt_prec, sfmt_flags
/* ready to call printf() */
switch (AST(ast_cnt, pf_type)) {
case AST(0, PF_C):
/* FALLTHRU */
case AST(1, PF_C):
/* FALLTHRU */
case AST(2, PF_C):
make_sfmt(p, ast, &sfmt_width, &sfmt_prec, &sfmt_flags);
stream_puts_sfmt(PUTS_C_ARGS);
break;
case AST(0, PF_S):
/* FALLTHRU */
case AST(1, PF_S):
/* FALLTHRU */
case AST(2, PF_S):
make_sfmt(p, ast, &sfmt_width, &sfmt_prec, &sfmt_flags);
stream_puts_sfmt(PUTS_S_ARGS);
break;
#undef PUTS_C_ARGS
#undef PUTS_S_ARGS
case AST(0, PF_D):
fprintf(fp, MY_FMT, Ival);
break;
case AST(1, PF_D):
fprintf(fp, MY_FMT, ast[0], Ival);
break;
case AST(2, PF_D):
fprintf(fp, MY_FMT, ast[0], ast[1], Ival);
break;
case AST(0, PF_U):
fprintf(fp, MY_FMT, Uval);
break;
case AST(1, PF_U):
fprintf(fp, MY_FMT, ast[0], Uval);
break;
case AST(2, PF_U):
fprintf(fp, MY_FMT, ast[0], ast[1], Uval);
break;
case AST(0, PF_F):
fprintf(fp, p, cp->dval);
break;
case AST(1, PF_F):
fprintf(fp, p, ast[0], cp->dval);
break;
case AST(2, PF_F):
fprintf(fp, p, ast[0], ast[1], cp->dval);
break;
}
*q = save;
argcnt--;
cp++;
}
}
CELL *
bi_printf(CELL *sp)
{
register int k;
register CELL *p;
FILE *fp;
TRACE_FUNC2("bi_printf", sp,
((sp->type < 0)
? (sp - 1)->type
: sp->type));
k = sp->type;
if (k < 0) {
/* k has redirection */
if ((--sp)->type < C_STRING)
cast1_to_s(sp);
fp = (FILE *) file_find(string(sp), k);
free_STRING(string(sp));
k = (--sp)->type;
/* k is now number of args including format */
} else
fp = stdout;
sp -= k; /* sp points at the format string */
k--;
if (sp->type < C_STRING)
cast1_to_s(sp);
do_printf(fp, string(sp)->str, (unsigned) k, sp + 1);
free_STRING(string(sp));
/* cleanup arguments on eval stack */
for (p = sp + 1; k; k--, p++)
cell_destroy(p);
return --sp;
}
/*
* Note: caller must do CELL cleanup.
* The format parameter is modified, but restored.
*/
static STRING *
do_sprintf(
char *format,
unsigned argcnt, /* number of args on eval stack */
CELL *cp) /* ptr to an array of arguments
(on the eval stack) */
{
char save; /* saves when temporary null ends format */
int splice;
char *p;
register char *q = format;
register char *target = sprintf_buff;
int l_flag, h_flag; /* seen %ld or %hd */
int ast_cnt;
int ast[2];
ULong Uval = 0;
Long Ival = 0;
int sfmt_width, sfmt_prec, sfmt_flags, s_format;
int num_conversion = 0; /* for error messages */
const char *who = "sprintf"; /*ditto */
int pf_type = 0; /* conversion type */
STRING onechr;
char xbuff[256]; /* splice in l qualifier here */
while (1) {
while (*q != '%') {
if (*q == 0) {
if (target > sprintf_limit) /* damaged */
{
/* hope this works */
rt_overflow("sprintf buffer",
(unsigned) (sprintf_limit - sprintf_buff));
} else { /* really done */
return new_STRING1(sprintf_buff,
(size_t) (target - sprintf_buff));
}
} else {
*target++ = *q++;
}
}
/* *q == '%' */
num_conversion++;
if (*++q == '%') { /* %% */
*target++ = *q;
q++;
continue;
}
/* mark the '%' with p */
p = q - 1;
/* eat the flags */
while (*q == '-' || *q == '+' || *q == ' ' ||
*q == '#' || *q == '0' || *q == '\'')
q++;
ast_cnt = 0;
ast[0] = 0;
if (*q == '*') {
if (cp->type != C_DOUBLE)
cast1_to_d(cp);
ast[ast_cnt++] = d_to_i(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++] = d_to_i(cp++->dval);
argcnt--;
q++;
} else {
while (scan_code[*(unsigned char *) q] == SC_DIGIT)
q++;
}
}
if ((int) argcnt <= 0)
rt_error("not enough arguments passed to %s(\"%s\")",
who, format);
l_flag = h_flag = 0;
for (;;) {
if (*q == 'l') {
++q;
++l_flag;
} else if (*q == 'h') {
++q;
++h_flag;
} else {
break;
}
}
splice = 0;
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 = d_to_L(cp->dval);
break;
case C_STRING:
#ifndef NO_INTERVAL_EXPR
/* fall thru to check for bad number formats */
/* fall thru */
#else
Ival = string(cp)->str[0];
break;
#endif
case C_MBSTRN:
check_strnum(cp);
Ival = ((cp->type == C_STRING)
? string(cp)->str[0]
: d_to_I(cp->dval));
break;
default:
bozo("printf %c");
}
onechr.len = 1;
onechr.str[0] = (char) Ival;
pf_type = PF_C;
break;
case 'd':
if (cp->type != C_DOUBLE)
cast1_to_d(cp);
if (cp->dval >= (double) Max_Long) {
Uval = d_to_UL(cp->dval);
pf_type = PF_U;
} else {
Ival = d_to_L(cp->dval);
pf_type = PF_D;
}
SpliceFormat(!l_flag || h_flag);
break;
case 'i':
if (cp->type != C_DOUBLE)
cast1_to_d(cp);
Ival = d_to_L(cp->dval);
pf_type = PF_D;
SpliceFormat(!l_flag || h_flag);
break;
case 'o':
case 'x':
case 'X':
case 'u':
if (cp->type != C_DOUBLE)
cast1_to_d(cp);
Uval = d_to_UL(cp->dval);
pf_type = PF_U;
SpliceFormat(!l_flag);
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);
}
#ifdef SHORT_INTS
if (pf_type == PF_D)
p = xbuff;
#endif
save = *q;
*q = 0;
if (splice) {
/* need to splice in long modifier */
CopySplice(xbuff, p);
if (l_flag < ELL_LIMIT) {
int k = (int) (q - p);
switch (h_flag) {
case 2:
Ival = (char) Ival;
if (pf_type == PF_D)
Ival &= 0xff;
break;
case 1:
Ival = (short) Ival;
if (pf_type == PF_D)
Ival &= 0xffff;
break;
default:
do {
xbuff[k] = xbuff[k - 1];
xbuff[k - 1] = 'l';
xbuff[++k] = 0;
} while (++l_flag < ELL_LIMIT);
if ((pf_type == PF_U) && (xbuff[k - 1] == 'd'))
xbuff[k - 1] = 'u';
break;
}
}
p = xbuff;
}
#define PUTS_C_ARGS target, onechr.str, 1, sfmt_width, sfmt_prec, sfmt_flags
#define PUTS_S_ARGS target, string(cp)->str, (int) string(cp)->len, sfmt_width, sfmt_prec, sfmt_flags
/* ready to call printf() */
s_format = 0;
switch (AST(ast_cnt, pf_type)) {
case AST(0, PF_C):
/* FALLTHRU */