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/* $Id: nhextio.c,v 1.5 2003/10/25 18:06:01 j_ali Exp $ */
/* Copyright (c) Slash'EM Development Team 2003 */
/* NetHack may be freely redistributed. See license for details. */
/* NhExt: buffering support */
/* #define PRINTF_FP_SUPPORT */ /* Support for %e, %f & %g */
#include <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include <string.h>
#ifdef PRINTF_FP_SUPPORT
#include <float.h>
#endif
#include "nhxdr.h"
struct NhExtIO_ {
unsigned int flags;
unsigned int autofill_limit; /* Zero for no limit */
nhext_io_func func, nb_func;
void *handle;
unsigned char buffer[1025]; /* Capable of storing n-1 chars */
unsigned char *rp, *wp;
NhExtNB *nb;
};
#define ADVANCE_PTR(io, ptr, inc) \
do { \
(ptr) += (inc); \
if ((ptr) >= (io)->buffer + sizeof((io)->buffer)) \
(ptr) -= sizeof((io)->buffer); \
} while(0)
/* Flags changeable by nhext_io_setmode */
#define NHEXT_IO__USERFLAGS (NHEXT_IO_NOAUTOFILL | NHEXT_IO_LINEBUF)
/* Flags readable by nhext_io_getmode */
#define NHEXT_IO__READFLAGS (NHEXT_IO__USERFLAGS | \
NHEXT_IO_NBLOCK | \
NHEXT_IO_RDONLY | \
NHEXT_IO_WRONLY)
NhExtIO *nhext_io_open(nhext_io_func func, void *handle, unsigned int flags)
{
NhExtIO *io;
io = malloc(sizeof(*io));
if (!io)
return NULL;
io->flags = flags;
io->autofill_limit = 0;
io->func = func;
io->nb_func = NULL;
io->handle = handle;
io->rp = io->wp = io->buffer;
io->nb = NULL;
return io;
}
int nhext_io_close(NhExtIO *io)
{
int retval;
retval = nhext_io_flush(io);
if (io->nb)
(void)nhext_nb_close(io->nb);
free(io);
return retval;
}
unsigned int nhext_io_getmode(NhExtIO *io)
{
return io->flags & NHEXT_IO__READFLAGS;
}
void nhext_io_setmode(NhExtIO *io, unsigned int flags)
{
io->flags &= ~NHEXT_IO__USERFLAGS;
io->flags |= flags & NHEXT_IO__USERFLAGS;
}
/* Warning: The numbering of free blocks is a little odd */
static void nhext_io__getfree(NhExtIO *io, int *nf1, int *nf2)
{
/* R
* W
* +--------------------+
* |222222222222222222|G| 1 - free1, 2 - free2, D - data, G - guard
* +--------------------+
*
* R W
* +--------------------+
* |111|G|DDDDDDDD|22222|
* +--------------------+
*
* R W
* +--------------------+
* |DDDDDDDDDDDD|22222|G|
* +--------------------+
*
* W R
* +--------------------+
* |111|G|DDDDDDDDDDDDDD|
* +--------------------+
*
* W R
* +--------------------+
* |DDD|G|DDDDDDDDDDDDDD| (and variations with guard byte at start or end)
* +--------------------+
*/
*nf1 = io->wp >= io->rp ? io->rp - io->buffer: io->rp - io->wp;
*nf2 = io->wp >= io->rp ? io->buffer + sizeof(io->buffer) - io->wp : 0;
/* Guard byte goes in free1 if non-empty else in free2 */
if (*nf1)
(*nf1)--;
else
(*nf2)--;
}
/* If an autofill limit is set, then autofill will be enabled until
* that many bytes have been read and then disabled. Set a zero limit
* to allow an unlimited number of bytes to be read (the default).
* Notes:
* 1. When a limit is in place, all calls to filbuf will reduce
* the limit by the number of bytes read regardless of whether the
* call was made internally or by the application.
* 2. If there are unread bytes in the buffer at the time this function
* is called then the limit will be adjusted as if they had been read
* after the given limit was set.
*/
void nhext_io_setautofill_limit(NhExtIO *io, unsigned int limit)
{
int nf1, nf2, nb;
nhext_io__getfree(io, &nf1, &nf2);
nb = sizeof(io->buffer) - nf1 - nf2 - 1;
if (limit > nb) {
io->flags &= ~NHEXT_IO_NOAUTOFILL;
io->autofill_limit = limit - nb;
} else {
io->flags |= NHEXT_IO_NOAUTOFILL;
io->autofill_limit = 0;
}
}
void nhext_io_setnbfunc(NhExtIO *io, nhext_io_func func)
{
/* If there is a read pending then delay the closure until it completes */
if (io->nb && !(io->flags & NHEXT_IO_PENDING)) {
nhext_nb_close(io->nb);
io->nb = NULL;
}
io->nb_func = func;
io->flags |= NHEXT_IO_NBLOCK;
}
/*
* Returns: >0 if buffer now non-empty,
* else 0 on EOF, -1 on error, or -2 on would block
*/
int nhext_io_filbuf(NhExtIO *io, int blocking)
{
int retval, nf1, nf2;
if (!blocking && !(io->flags & NHEXT_IO_NBLOCK))
return -2;
/*
* NHEXT_IO_NBLOCK is advisory only, so no error on failure
*/
if ((io->flags & NHEXT_IO_NBLOCK) && !io->nb && !io->nb_func) {
io->nb = nhext_nb_open(io->func, io->handle);
if (!io->nb)
io->flags &= ~NHEXT_IO_NBLOCK;
}
if (io->rp == io->wp && !(io->flags & NHEXT_IO_PENDING))
io->rp = io->wp = io->buffer;
nhext_io__getfree(io, &nf1, &nf2);
if (nf2) {
if (nf1 && !(io->flags & NHEXT_IO_PENDING)) {
/* Combine free blocks so that we don't make unneccesary
* calls to I/O function (which may be expensive).
*/
io->flags &= ~NHEXT_IO_SIMPLEBUFFER;
memmove(io->buffer, io->rp, io->wp - io->rp);
io->wp += io->buffer - io->rp;
io->rp = io->buffer;
}
nf1 += nf2;
/* nf2 = 0 */
}
if (!nf1)
return 1; /* Buffer is full */
/*
* A simple buffer is one that has the whole of the latest packet read
* stored starting at io->buffer and ending at io->wp - 1. Such buffers
* may be used to retrieve said packet by calling nhext_io_getpacket().
*/
if (io->wp == io->buffer)
io->flags |= NHEXT_IO_SIMPLEBUFFER;
else
io->flags &= ~NHEXT_IO_SIMPLEBUFFER;
if (io->nb) {
retval = nhext_nb_read(io->nb, io->wp, nf1, blocking);
/*
* If we have a read call pending then we must remeber this so that
* we don't change io->wp or allow a direct read or else NhExtNB's
* requirements (of keeping read call parameters constant until a
* read is complete) would be broken.
*/
if (retval == -2)
io->flags |= NHEXT_IO_PENDING;
else {
io->flags &= ~NHEXT_IO_PENDING;
if (io->nb_func) {
/* Closure delayed until completion of pending read */
nhext_nb_close(io->nb);
io->nb = NULL;
}
}
} else if (!blocking)
retval = (*io->nb_func)(io->handle, io->wp, nf1);
else {
retval = (*io->func)(io->handle, io->wp, nf1);
if (retval < 0)
retval = -1;
}
if (retval > 0) {
ADVANCE_PTR(io, io->wp, retval);
if (!(io->flags & NHEXT_IO_NOAUTOFILL) && io->autofill_limit) {
if (io->autofill_limit > retval)
io->autofill_limit -= retval;
else {
io->autofill_limit = 0;
io->flags |= NHEXT_IO_NOAUTOFILL;
}
}
}
return retval;
}
int nhext_io_getc(NhExtIO *io)
{
unsigned char c;
if (io->rp == io->wp &&
(io->flags & NHEXT_IO_NOAUTOFILL || nhext_io_filbuf(io, TRUE) <= 0))
return -1; /* getc doesn't distinguish EOF and ERROR */
c = *io->rp;
ADVANCE_PTR(io, io->rp, 1);
if (io->rp == io->wp && io->nb)
nhext_io_filbuf(io, FALSE);
return c;
}
/*
* nhext_io_read() reads between 1 and nb bytes from the stream. A read will
* only be requested on the underlying I/O system if there would otherwise
* be no bytes to return to the caller (and not even then if NOAUTOFILL is
* set). This prevents blocking but means that using nhext_io_read() to
* read fixed sized datums is not useful. For example,
* nhext_io_read(io, &datum, sizeof(datum))
* may easily only partially read datum even though the rest of datum is
* available for reading. Where the caller knows in advance that an infinite
* block will not occur when reading, nhext_io_fread() should be used instead:
* nhext_io_fread(&datum, sizeof(datum), 1, io);
*/
int nhext_io_read(NhExtIO *io, char *buf, int nb)
{
int i;
int retval = 0;
/* Satisfy from read buffer (or 1st half if split) */
if (nb && io->rp != io->wp) {
if (io->wp > io->rp)
i = io->wp - io->rp;
else
i = io->buffer + sizeof(io->buffer) - io->rp;
if (i > nb)
i = nb;
memcpy(buf, io->rp, i);
ADVANCE_PTR(io, io->rp, i);
buf += i;
nb -= i;
retval += i;
}
/* Satisfy from 2nd half of read buffer */
if (nb && io->rp != io->wp) {
i = io->wp - io->rp; /* rp must point at buffer at this point */
if (i > nb)
i = nb;
memcpy(buf, io->rp, i);
ADVANCE_PTR(io, io->rp, i);
buf += i;
nb -= i;
retval += i;
}
/* The buffer is empty or the request is satisfied.
* If we've read some data or we shouldn't auto-fill then we're done
*/
if (retval || io->flags & NHEXT_IO_NOAUTOFILL) {
if (io->nb)
nhext_io_filbuf(io, FALSE);
return retval;
}
if (nb >= sizeof(io->buffer) && !(io->flags & NHEXT_IO_PENDING)) {
/* If caller still wants more than we can buffer and we don't have
* a read call pending, read direct
*/
io->flags &= ~NHEXT_IO_SIMPLEBUFFER;
if (io->nb)
i = nhext_nb_read(io->nb, buf, nb, TRUE);
else
i = (*io->func)(io->handle, buf, nb);
if (i <= 0) {
/* If we have previously read some data correctly, then return
* this number and leave EOF/ERROR reporting until later.
* Otherwise report EOF as 0 and ERROR as -1
*/
return retval ? retval : i < 0 ? -1 : 0;
}
if (io->autofill_limit) {
if (io->autofill_limit > i)
io->autofill_limit -= i;
else {
io->autofill_limit = 0;
io->flags |= NHEXT_IO_NOAUTOFILL;
}
}
buf += i;
nb -= i;
retval += i;
} else if (nb) {
/* Caller wants a fragment or we have a read call pending;
* fill our buffer and then satisfy from there.
*/
i = nhext_io_filbuf(io, TRUE);
if (i <= 0)
return retval ? retval : i < 0 ? -1 : 0; /* As above */
i = io->wp - io->rp; /* rp must point at buffer at this point */
if (i > nb)
i = nb;
memcpy(buf, io->rp, i);
ADVANCE_PTR(io, io->rp, i);
buf += i;
nb -= i;
retval += i;
}
return retval;
}
/* nhext_io_fread() reads up to nmemb members of the given size and returns
* the number read. Where fewer members were read than requested then an EOF
* or ERROR has occured. Any partially read member will still be available
* for reading after nhext_io_fread() returns.
*
* A negative return indicates that the member size is too large.
*/
int nhext_io_fread(void *buffer, int size, int nmemb, NhExtIO *io)
{
int nb, bf;
int nbp = 0; /* Number of bytes read in partial read */
int nm = nmemb; /* Members still to read */
if (size > sizeof(io->buffer)) {
/*
* We need enough room to store a partial member so that we don't
* get an indeterminate result. This means that the buffer must
* be capable of storing (size - 1) bytes, which is equivalent to
* saying that the buffer size (including the guard byte) must be
* no smaller than the size of a member.
*/
return -1;
}
if (size <= 0)
return -1;
bf = INT_MAX / size; /* Blocking factor */
while(nm) {
if (bf > nm)
bf = nm;
nb = nhext_io_read(io, buffer, bf * size);
if (nb <= 0)
return nmemb - nm;
buffer += nb;
nm -= nb / size;
nbp = nb % size;
while(nbp) {
nb = nhext_io_read(io, buffer, size - nbp);
if (nb <= 0) {
/* EOF or ERROR after a partial read.
*
* The buffer must be empty so we can place the partially
* read member back into it.
*/
io->flags &= ~NHEXT_IO_SIMPLEBUFFER;
memcpy(io->buffer, buffer - nbp, nbp);
io->rp = io->buffer;
io->wp = io->buffer + nbp;
return nmemb - nm;
}
nbp += nb;
buffer += nb;
if (nbp == size) {
nm--;
nbp = 0;
}
}
}
return nmemb;
}
/* nhext_io_getpacket() gets the last packet read under certain circumstances.
* This will always work if the caller sets no-autofill mode and calls
* nhext_io_fillbuf() on an empty buffer. Calls to nhext_io_fread() must
* also be avoided since this can cause simple buffer mode to be cancelled
* (nhext_io_fread() could be re-written to avoid this if it became important).
*/
char *nhext_io_getpacket(NhExtIO *io, int *nb)
{
if (io->flags & NHEXT_IO_SIMPLEBUFFER) {
*nb = io->wp - io->buffer;
return io->buffer;
} else
return NULL;
}
/* Return TRUE if a read call would block */
int nhext_io_willblock(NhExtIO *io)
{
if (io->flags & NHEXT_IO_WRONLY)
return -1;
if (io->rp != io->wp)
return FALSE; /* Buffer non-empty */
if (io->flags & NHEXT_IO_NBLOCK)
nhext_io_filbuf(io, FALSE);
return io->rp == io->wp;
}
int nhext_io_flush(NhExtIO *io)
{
unsigned char *s;
int retval, nb1, nb2;
if (io->rp == io->wp)
return 0; /* Nothing to do */
if (!(io->flags & NHEXT_IO_WRONLY))
return 0; /* Read streams don't need flushing */
/*
* W R
* +--------------------+
* |11111|FFFFF|G|222222| 1 - block1, 2 - block2, F - free, G - guard
* +--------------------+
*
* R W
* +--------------------+
* |FFF|G|11111111|FFFFF|
* +--------------------+
*
* R W
* +--------------------+
* |111111111111|FFFFF|G|
* +--------------------+
*
* W R
* +--------------------+
* |FFF|G|22222222222222|
* +--------------------+
*
* W R
* +--------------------+
* |111|G|22222222222222| (and variations with guard byte at start or end)
* +--------------------+
*/
nb1 = io->wp >= io->rp ? io->wp - io->rp : io->wp - io->buffer;
nb2 = io->wp >= io->rp ? 0 : io->buffer + sizeof(io->buffer) - io->rp;
if (nb1 && nb2) {
/* Try and combine split buffer so that we don't make unneccesary
* calls to I/O function (which may be expensive).
*/
s = malloc(nb2); /* For copy of 2nd half */
if (s) {
memcpy(s, io->buffer, nb2);
memmove(io->buffer, io->rp, nb1);
memcpy(io->buffer + nb1, s, nb2);
io->rp = io->buffer;
io->wp = io->buffer + nb1 + nb2;
nb1 += nb2;
nb2 = 0;
free(s);
}
}
/* Write out buffer (or 1st half if split) */
while (nb1) {
retval = (*io->func)(io->handle, io->rp, nb1);
if (retval > 0) {
ADVANCE_PTR(io, io->rp, retval);
nb1 -= retval;
} else
return -1;
}
/* Write out 2nd half */
while (nb2) {
retval = (*io->func)(io->handle, io->rp, nb2);
if (retval > 0) {
io->rp += retval; /* rp can't wrap while writing 2nd half */
nb2 -= retval;
} else
return -1;
}
io->rp = io->wp = io->buffer; /* Buffer is now empty */
return 0;
}
int nhext_io_fputc(int c, NhExtIO *io)
{
unsigned char ch, *wp = io->wp;
ch = c;
*wp = ch;
ADVANCE_PTR(io, wp, 1);
if (wp == io->rp) {
/* Buffer was full; flush first */
if (nhext_io_flush(io))
return -1;
*io->wp = ch;
ADVANCE_PTR(io, io->wp, 1);
}
else
io->wp = wp;
if (io->flags & NHEXT_IO_LINEBUF && ch == '\n' && nhext_io_flush(io))
return -1;
return (int)ch;
}
int nhext_io_write(NhExtIO *io, char *buf, int nb)
{
int i;
int retval = 0, nf1, nf2;
/* If the buffer is not empty, then top it up first */
if (nb && io->wp != io->rp) {
nhext_io__getfree(io, &nf1, &nf2);
/* If free2 is non-empty, then wp must point at it so store there first
*/
if (nb && nf2) {
i = nf2;
if (i > nb)
i = nb;
memcpy(io->wp, buf, i);
ADVANCE_PTR(io, io->wp, i);
buf += i;
nb -= i;
retval += i;
/* nf2 -= i; */
}
/* If there is any excess then store in free1
* (which wp must now point to after filling free2)
*/
if (nb && nf1) {
i = nf1;
if (i > nb)
i = nb;
memcpy(io->wp, buf, i);
ADVANCE_PTR(io, io->wp, i);
buf += i;
nb -= i;
retval += i;
/* nf1 -= i; */
}
}
if (nb) {
/* Then flush the buffer (which must be either empty (NOP) or full) */
if (nhext_io_flush(io))
return retval ? retval : -1;
/* If we can't buffer the data then write it directly until we can.
*/
while (nb >= sizeof(io->buffer)) {
i = (*io->func)(io->handle, buf, nb);
if (i <= 0)
return retval ? retval : i;
buf += i;
nb -= i;
retval += i;
}
}
if (nb) {
/* Finally, place the last fragment in the by now empty buffer */
memcpy(io->buffer, buf, nb);
io->wp += nb;
retval += nb;
}
return retval;
}
/* A version of write that honours LINEBUF */
int nhext_io_writet(NhExtIO *io, char *buf, int nb)
{
int i, retval = 0;
if (!(io->flags & NHEXT_IO_LINEBUF))
return nhext_io_write(io, buf, nb);
for(i = nb - 1; i >= 0; i--)
if (buf[i] == '\n') {
retval = nhext_io_write(io, buf, i + 1);
if (retval <= i || nhext_io_flush(io) || retval == nb)
return retval;
break;
}
i = nhext_io_write(io, buf + retval, nb - retval);
if (i > 0)
retval += i;
else if (!retval)
retval = i;
return retval;
}
#define NHEXT_IO_FMT_LJUST 0x00001 /* neg width */
#define NHEXT_IO_FMT_SIGN 0x00002 /* + prefix */
#define NHEXT_IO_FMT_ALT 0x00004 /* # prefix */
#define NHEXT_IO_FMT_ZEROPAD 0x00008 /* 0 prefix */
#define NHEXT_IO_FMT_WIDTH 0x00010 /* width present */
#define NHEXT_IO_FMT_PRECISION 0x00020 /* precision present */
#define NHEXT_IO_FMT_SHORT 0x00040 /* h prefix */
#define NHEXT_IO_FMT_LONG 0x00080 /* l prefix */
#define NHEXT_IO_FMT_UNSIGNED 0x00100 /* u, x, X, p or P */
#define NHEXT_IO_FMT_HEX 0x00200 /* x, X, p or P */
#define NHEXT_IO_FMT_PTR 0x00400 /* p or P */
#define NHEXT_IO_FMT_CAPS 0x00800 /* Upper case variant */
#define NHEXT_IO_FMT_NEG 0x01000 /* Value is negative */
#define NHEXT_IO_FMT_EXP 0x02000 /* Output exponent suffix */
#define NHEXT_IO_FMT_DONE 0x04000 /* %fmt finished */
static int nhext_io_pad(NhExtIO *io, int flags, int padding, int pre)
{
int i, nb = 0;
int do_pad = (flags & (NHEXT_IO_FMT_WIDTH | NHEXT_IO_FMT_LJUST)) ==
(pre ? NHEXT_IO_FMT_WIDTH : NHEXT_IO_FMT_WIDTH | NHEXT_IO_FMT_LJUST);
int zero_pad = pre && flags & NHEXT_IO_FMT_ZEROPAD;
if (flags & (NHEXT_IO_FMT_SIGN | NHEXT_IO_FMT_NEG))
padding--;
if ((flags & (NHEXT_IO_FMT_HEX | NHEXT_IO_FMT_ALT)) ==
(NHEXT_IO_FMT_HEX | NHEXT_IO_FMT_ALT))
padding -= 2;
if (do_pad && !zero_pad) {
for(i = 0; i < padding; i++)
if (nhext_io_fputc(' ', io) < 0)
return -1;
else
nb++;
}
if (pre) {
if (flags & (NHEXT_IO_FMT_SIGN | NHEXT_IO_FMT_NEG)) {
if (nhext_io_fputc(flags & NHEXT_IO_FMT_NEG ? '-' : '+', io) < 0)
return -1;
else
nb++;
}
if ((flags & (NHEXT_IO_FMT_HEX | NHEXT_IO_FMT_ALT)) ==
(NHEXT_IO_FMT_HEX | NHEXT_IO_FMT_ALT)) {
if (nhext_io_fputc('0', io) < 0)
return -1;
if (nhext_io_fputc(flags & NHEXT_IO_FMT_CAPS ? 'X' : 'x', io) < 0)
return -1;
nb += 2;
}
}
if (do_pad && zero_pad) {
for(i = 0; i < padding; i++)
if (nhext_io_fputc('0', io) < 0)
return -1;
else
nb++;
}
return nb;
}
/* Warning: Always cast signed integers to long before passing to printi */
static int nhext_io_printi(NhExtIO *io, int flags, int width, unsigned long v)
{
int i, retval = 0, digit, w, padding;
int radix = flags & NHEXT_IO_FMT_HEX ? 16 : 10;
static const char *lc_digits = "0123456789abcdef";
static const char *uc_digits = "0123456789ABCDEF";
const char *digits = flags & NHEXT_IO_FMT_CAPS ? uc_digits : lc_digits;
char buffer[8 * sizeof(v) / 3 + 1]; /* Recalculate if radix < 10 */
char *p;
if (!(flags & NHEXT_IO_FMT_UNSIGNED) && (long)v < 0) {
flags |= NHEXT_IO_FMT_NEG;
v = -(long)v;
}
p = buffer + sizeof(buffer);
w = 0;
do {
digit = v % radix;
v /= radix;
*--p = digits[digit];
w++;
} while (v || flags & NHEXT_IO_FMT_PTR && w < sizeof(void *) * 2);
padding = width - w;
i = nhext_io_pad(io, flags, padding, TRUE);
if (i < 0)
return -1;
else
retval += i;
if (nhext_io_write(io, p, w) != w)
return -1;
else
retval += w;
i = nhext_io_pad(io, flags, padding, FALSE);
if (i < 0)
return -1;
else
retval += i;
return retval;
}
/*
* A cut down version of printf. Not all ANSI C features are implemented.
* Use with caution.
*/
int nhext_io_vprintf(NhExtIO *io, char *fmt, va_list ap)
{
int i, j, nb = 0;
unsigned long ul;
char *s;
int flags, width, precision;
#ifdef PRINTF_FP_SUPPORT
double d;
int padding, expon, dp, sgn;
static int exp_width = 0;
if (!exp_width) {
i = DBL_MAX_10_EXP;
while (i) {
i /= 10;
exp_width++;
}
exp_width++;
}
#endif
while(*fmt) {
for(i = 0; fmt[i] && fmt[i] != '%'; i++)
;
if (i) {
if (nhext_io_writet(io, fmt, i) != i)
return -1;
else
nb += i;
fmt += i;
}
if (!*fmt)
break;
flags = 0;
while (!(flags & NHEXT_IO_FMT_DONE) && *++fmt) {
switch(*fmt) {
case '-':
flags |= NHEXT_IO_FMT_LJUST;
break;
case '+':
flags |= NHEXT_IO_FMT_SIGN;
break;
case '#':
flags |= NHEXT_IO_FMT_ALT;
break;
case '.':
flags |= NHEXT_IO_FMT_PRECISION;
precision = 0;
break;
case '*':
if (flags & NHEXT_IO_FMT_PRECISION)
precision = va_arg(ap, int);
else {
flags |= NHEXT_IO_FMT_WIDTH;
width = va_arg(ap, int);
if (width < 0) {
flags |= NHEXT_IO_FMT_LJUST;
width = -width;
}
}
break;
case '0':
if (flags & NHEXT_IO_FMT_PRECISION)
precision *= 10;
else if (flags & NHEXT_IO_FMT_WIDTH)
width *= 10;
else
flags |= NHEXT_IO_FMT_ZEROPAD;
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (flags & NHEXT_IO_FMT_PRECISION) {
precision *= 10;
precision += *fmt - '0';
} else if (flags & NHEXT_IO_FMT_WIDTH) {
width *= 10;
width += *fmt - '0';
} else {
flags |= NHEXT_IO_FMT_WIDTH;
width = *fmt - '0';
}
break;
case 'h':
flags |= NHEXT_IO_FMT_SHORT;
flags &= ~NHEXT_IO_FMT_LONG;
break;
case 'l':
flags |= NHEXT_IO_FMT_LONG;
flags &= ~NHEXT_IO_FMT_SHORT;
break;
case 'c':
i = nhext_io_pad(io, flags, width - 1, TRUE);
if (i < 0)
return -1;
else
nb += i;
if (nhext_io_fputc((char)va_arg(ap, int), io) < 0)
return -1;
else
nb++;
i = nhext_io_pad(io, flags, width - 1, FALSE);
if (i < 0)
return -1;
else
nb += i;
flags |= NHEXT_IO_FMT_DONE;
break;
case 'P':
case 'p':
case 'X':
case 'x':
if (*fmt == 'p' || *fmt == 'P')
flags |= NHEXT_IO_FMT_PTR;
if (*fmt == 'P' || *fmt == 'X')
flags |= NHEXT_IO_FMT_CAPS;
flags |= NHEXT_IO_FMT_HEX;
/* Fall through */
case 'u':
flags |= NHEXT_IO_FMT_UNSIGNED;
flags &= ~NHEXT_IO_FMT_SIGN;
/* Fall through */
case 'd':
case 'i':
if (flags & NHEXT_IO_FMT_LONG)
ul = va_arg(ap, long);
else if (flags & NHEXT_IO_FMT_UNSIGNED)
ul = va_arg(ap, unsigned int);
else
ul = (long)va_arg(ap, int);
i = nhext_io_printi(io, flags, width, ul);
if (i < 0)
return -1;
else
nb += i;
flags |= NHEXT_IO_FMT_DONE;
break;
#ifdef PRINTF_FP_SUPPORT
case 'E':
case 'F':
case 'G':
flags |= NHEXT_IO_FMT_CAPS;
/* Fall through */
case 'e':
case 'f':
case 'g':
if (!(flags & NHEXT_IO_FMT_PRECISION))
precision = 6;
d = va_arg(ap, double);
s = fcvt(d, precision, &dp, &sgn);
if (*fmt == 'f')
j = strlen(s);
else {
j = precision;
if (*fmt == 'e' || *fmt == 'E')
j++;
s = fcvt(d, j - dp, &dp, &sgn);
if (j > precision || dp > precision || dp < -3) {
flags |= NHEXT_IO_FMT_EXP;
expon = dp - 1;
dp = 1;
}
}
if (sgn)
flags |= NHEXT_IO_FMT_NEG;
padding = width - j;
if (dp <= 0)
padding += dp - 2;
else if (dp < j)
padding--;
if (flags & NHEXT_IO_FMT_EXP)
padding -= 5;
i = nhext_io_pad(io, flags, padding, TRUE);
if (i < 0)
return -1;
else
nb += i;
if (dp <= 0) {
if (nhext_io_write(io, "0.", 2) != 2)
return -1;
for(i = dp; i < 0; i++)
if (nhext_io_fputc('0', io) < 0)
return -1;
if (nhext_io_write(io, s, j) != j)
return -1;
nb += 2 - dp;
} else if (dp < j) {
if (nhext_io_write(io, s, dp) != dp)
return -1;
if (nhext_io_fputc('.', io) < 0)
return -1;
if (nhext_io_write(io, s + dp, j - dp) != j - dp)
return -1;
nb++;
} else if (nhext_io_write(io, s, j) != j)
return -1;
nb += j;
if (flags & NHEXT_IO_FMT_EXP) {
if (nhext_io_fputc(
flags & NHEXT_IO_FMT_CAPS ? 'E' : 'e', io) < 0)
return -1;
if (nhext_io_printi(io, NHEXT_IO_FMT_ZEROPAD |
NHEXT_IO_FMT_WIDTH | NHEXT_IO_FMT_SIGN, exp_width,
(long)expon) < 0)
return -1;
}
i = nhext_io_pad(io, flags, padding, FALSE);
if (i < 0)
return -1;
else
nb += i;
flags |= NHEXT_IO_FMT_DONE;
break;
#endif /* PRINTF_FP_SUPPORT */
case 's':
s = va_arg(ap, char *);
if (flags & NHEXT_IO_FMT_PRECISION)
j = precision;
else
j = s ? strlen(s) : 6;
i = nhext_io_pad(io, flags, width - j, TRUE);
if (i < 0)
return -1;
else
nb += i;
if (nhext_io_writet(io, s ? s : "(null)", j) != j)
return -1;
else
nb += j;
i = nhext_io_pad(io, flags, width - j, FALSE);
if (i < 0)
return -1;
else
nb += i;
flags |= NHEXT_IO_FMT_DONE;
break;
case '%':
default:
if (nhext_io_fputc(*fmt, io) < 0)
return -1;
else
nb++;
flags |= NHEXT_IO_FMT_DONE;
break;
}
}
if (flags & NHEXT_IO_FMT_DONE)
fmt++;
}
return nb;
}
int nhext_io_printf(NhExtIO *io, char *fmt, ...)
{
int retval;
va_list ap;
va_start(ap, fmt);
retval = nhext_io_vprintf(io, fmt, ap);
va_end(ap);
return retval;
}
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