37934a07cf
fool the compiler into not doing static bounds checking when we do one-past-the-array-boundary pointer assignments for cases where the only accesses are like (*--pointer); bump version
1014 lines
22 KiB
C
1014 lines
22 KiB
C
/* $OpenBSD: shf.c,v 1.15 2006/04/02 00:48:33 deraadt Exp $ */
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#include "sh.h"
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__RCSID("$MirOS: src/bin/mksh/shf.c,v 1.22 2008/10/10 21:30:43 tg Exp $");
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/* flags to shf_emptybuf() */
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#define EB_READSW 0x01 /* about to switch to reading */
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#define EB_GROW 0x02 /* grow buffer if necessary (STRING+DYNAMIC) */
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/*
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* Replacement stdio routines. Stdio is too flakey on too many machines
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* to be useful when you have multiple processes using the same underlying
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* file descriptors.
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*/
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static int shf_fillbuf(struct shf *);
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static int shf_emptybuf(struct shf *, int);
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/* Open a file. First three args are for open(), last arg is flags for
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* this package. Returns NULL if file could not be opened, or if a dup
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* fails.
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*/
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struct shf *
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shf_open(const char *name, int oflags, int mode, int sflags)
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{
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struct shf *shf;
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int bsize = sflags & SHF_UNBUF ? (sflags & SHF_RD ? 1 : 0) : SHF_BSIZE;
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int fd;
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/* Done before open so if alloca fails, fd won't be lost. */
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shf = (struct shf *)alloc(sizeof (struct shf) + bsize, ATEMP);
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shf->areap = ATEMP;
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shf->buf = (unsigned char *)&shf[1];
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shf->bsize = bsize;
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shf->flags = SHF_ALLOCS;
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/* Rest filled in by reopen. */
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fd = open(name, oflags, mode);
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if (fd < 0) {
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afree(shf, shf->areap);
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return NULL;
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}
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if ((sflags & SHF_MAPHI) && fd < FDBASE) {
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int nfd;
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nfd = fcntl(fd, F_DUPFD, FDBASE);
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close(fd);
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if (nfd < 0) {
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afree(shf, shf->areap);
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return NULL;
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}
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fd = nfd;
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}
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sflags &= ~SHF_ACCMODE;
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sflags |= (oflags & O_ACCMODE) == O_RDONLY ? SHF_RD :
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((oflags & O_ACCMODE) == O_WRONLY ? SHF_WR : SHF_RDWR);
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return shf_reopen(fd, sflags, shf);
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}
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/* Set up the shf structure for a file descriptor. Doesn't fail. */
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struct shf *
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shf_fdopen(int fd, int sflags, struct shf *shf)
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{
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int bsize = sflags & SHF_UNBUF ? (sflags & SHF_RD ? 1 : 0) : SHF_BSIZE;
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/* use fcntl() to figure out correct read/write flags */
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if (sflags & SHF_GETFL) {
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int flags = fcntl(fd, F_GETFL, 0);
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if (flags < 0)
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/* will get an error on first read/write */
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sflags |= SHF_RDWR;
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else {
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switch (flags & O_ACCMODE) {
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case O_RDONLY:
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sflags |= SHF_RD;
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break;
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case O_WRONLY:
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sflags |= SHF_WR;
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break;
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case O_RDWR:
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sflags |= SHF_RDWR;
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break;
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}
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}
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}
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if (!(sflags & (SHF_RD | SHF_WR)))
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internal_errorf("shf_fdopen: missing read/write");
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if (shf) {
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if (bsize) {
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shf->buf = (unsigned char *)alloc(bsize, ATEMP);
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sflags |= SHF_ALLOCB;
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} else
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shf->buf = NULL;
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} else {
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shf = (struct shf *)alloc(sizeof (struct shf) + bsize, ATEMP);
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shf->buf = (unsigned char *)&shf[1];
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sflags |= SHF_ALLOCS;
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}
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shf->areap = ATEMP;
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shf->fd = fd;
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shf->rp = shf->wp = shf->buf;
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shf->rnleft = 0;
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shf->rbsize = bsize;
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shf->wnleft = 0; /* force call to shf_emptybuf() */
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shf->wbsize = sflags & SHF_UNBUF ? 0 : bsize;
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shf->flags = sflags;
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shf->errno_ = 0;
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shf->bsize = bsize;
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if (sflags & SHF_CLEXEC)
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fcntl(fd, F_SETFD, FD_CLOEXEC);
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return shf;
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}
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/* Set up an existing shf (and buffer) to use the given fd */
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struct shf *
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shf_reopen(int fd, int sflags, struct shf *shf)
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{
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int bsize = sflags & SHF_UNBUF ? (sflags & SHF_RD ? 1 : 0) : SHF_BSIZE;
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/* use fcntl() to figure out correct read/write flags */
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if (sflags & SHF_GETFL) {
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int flags = fcntl(fd, F_GETFL, 0);
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if (flags < 0)
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/* will get an error on first read/write */
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sflags |= SHF_RDWR;
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else {
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switch (flags & O_ACCMODE) {
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case O_RDONLY:
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sflags |= SHF_RD;
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break;
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case O_WRONLY:
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sflags |= SHF_WR;
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break;
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case O_RDWR:
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sflags |= SHF_RDWR;
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break;
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}
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}
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}
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if (!(sflags & (SHF_RD | SHF_WR)))
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internal_errorf("shf_reopen: missing read/write");
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if (!shf || !shf->buf || shf->bsize < bsize)
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internal_errorf("shf_reopen: bad shf/buf/bsize");
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/* assumes shf->buf and shf->bsize already set up */
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shf->fd = fd;
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shf->rp = shf->wp = shf->buf;
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shf->rnleft = 0;
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shf->rbsize = bsize;
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shf->wnleft = 0; /* force call to shf_emptybuf() */
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shf->wbsize = sflags & SHF_UNBUF ? 0 : bsize;
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shf->flags = (shf->flags & (SHF_ALLOCS | SHF_ALLOCB)) | sflags;
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shf->errno_ = 0;
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if (sflags & SHF_CLEXEC)
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fcntl(fd, F_SETFD, FD_CLOEXEC);
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return shf;
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}
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/* Open a string for reading or writing. If reading, bsize is the number
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* of bytes that can be read. If writing, bsize is the maximum number of
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* bytes that can be written. If shf is not null, it is filled in and
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* returned, if it is null, shf is allocated. If writing and buf is null
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* and SHF_DYNAMIC is set, the buffer is allocated (if bsize > 0, it is
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* used for the initial size). Doesn't fail.
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* When writing, a byte is reserved for a trailing null - see shf_sclose().
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*/
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struct shf *
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shf_sopen(char *buf, int bsize, int sflags, struct shf *shf)
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{
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/* can't have a read+write string */
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if (!(sflags & (SHF_RD | SHF_WR)) ||
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(sflags & (SHF_RD | SHF_WR)) == (SHF_RD | SHF_WR))
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internal_errorf("shf_sopen: flags 0x%x", sflags);
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if (!shf) {
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shf = (struct shf *)alloc(sizeof (struct shf), ATEMP);
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sflags |= SHF_ALLOCS;
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}
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shf->areap = ATEMP;
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if (!buf && (sflags & SHF_WR) && (sflags & SHF_DYNAMIC)) {
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if (bsize <= 0)
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bsize = 64;
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sflags |= SHF_ALLOCB;
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buf = alloc(bsize, shf->areap);
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}
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shf->fd = -1;
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shf->buf = shf->rp = shf->wp = (unsigned char *)buf;
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shf->rnleft = bsize;
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shf->rbsize = bsize;
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shf->wnleft = bsize - 1; /* space for a '\0' */
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shf->wbsize = bsize;
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shf->flags = sflags | SHF_STRING;
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shf->errno_ = 0;
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shf->bsize = bsize;
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return shf;
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}
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/* Flush and close file descriptor, free the shf structure */
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int
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shf_close(struct shf *shf)
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{
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int ret = 0;
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if (shf->fd >= 0) {
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ret = shf_flush(shf);
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if (close(shf->fd) < 0)
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ret = EOF;
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}
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if (shf->flags & SHF_ALLOCS)
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afree(shf, shf->areap);
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else if (shf->flags & SHF_ALLOCB)
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afree(shf->buf, shf->areap);
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return ret;
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}
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/* Flush and close file descriptor, don't free file structure */
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int
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shf_fdclose(struct shf *shf)
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{
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int ret = 0;
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if (shf->fd >= 0) {
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ret = shf_flush(shf);
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if (close(shf->fd) < 0)
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ret = EOF;
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shf->rnleft = 0;
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shf->rp = shf->buf;
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shf->wnleft = 0;
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shf->fd = -1;
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}
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return ret;
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}
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/* Close a string - if it was opened for writing, it is null terminated;
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* returns a pointer to the string and frees shf if it was allocated
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* (does not free string if it was allocated).
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*/
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char *
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shf_sclose(struct shf *shf)
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{
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unsigned char *s = shf->buf;
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/* null terminate */
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if (shf->flags & SHF_WR) {
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shf->wnleft++;
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shf_putc('\0', shf);
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}
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if (shf->flags & SHF_ALLOCS)
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afree(shf, shf->areap);
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return (char *) s;
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}
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/* Un-read what has been read but not examined, or write what has been
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* buffered. Returns 0 for success, EOF for (write) error.
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*/
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int
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shf_flush(struct shf *shf)
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{
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if (shf->flags & SHF_STRING)
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return (shf->flags & SHF_WR) ? EOF : 0;
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if (shf->fd < 0)
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internal_errorf("shf_flush: no fd");
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if (shf->flags & SHF_ERROR) {
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errno = shf->errno_;
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return EOF;
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}
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if (shf->flags & SHF_READING) {
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shf->flags &= ~(SHF_EOF | SHF_READING);
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if (shf->rnleft > 0) {
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lseek(shf->fd, (off_t) -shf->rnleft, SEEK_CUR);
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shf->rnleft = 0;
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shf->rp = shf->buf;
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}
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return 0;
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} else if (shf->flags & SHF_WRITING)
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return shf_emptybuf(shf, 0);
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return 0;
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}
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/* Write out any buffered data. If currently reading, flushes the read
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* buffer. Returns 0 for success, EOF for (write) error.
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*/
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static int
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shf_emptybuf(struct shf *shf, int flags)
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{
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int ret = 0;
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if (!(shf->flags & SHF_STRING) && shf->fd < 0)
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internal_errorf("shf_emptybuf: no fd");
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if (shf->flags & SHF_ERROR) {
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errno = shf->errno_;
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return EOF;
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}
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if (shf->flags & SHF_READING) {
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if (flags & EB_READSW) /* doesn't happen */
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return 0;
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ret = shf_flush(shf);
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shf->flags &= ~SHF_READING;
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}
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if (shf->flags & SHF_STRING) {
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unsigned char *nbuf;
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/* Note that we assume SHF_ALLOCS is not set if SHF_ALLOCB
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* is set... (changing the shf pointer could cause problems)
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*/
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if (!(flags & EB_GROW) || !(shf->flags & SHF_DYNAMIC) ||
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!(shf->flags & SHF_ALLOCB))
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return EOF;
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/* allocate more space for buffer */
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nbuf = (unsigned char *)aresize(shf->buf, shf->wbsize * 2,
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shf->areap);
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shf->rp = nbuf + (shf->rp - shf->buf);
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shf->wp = nbuf + (shf->wp - shf->buf);
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shf->rbsize += shf->wbsize;
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shf->wnleft += shf->wbsize;
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shf->wbsize *= 2;
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shf->buf = nbuf;
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} else {
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if (shf->flags & SHF_WRITING) {
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int ntowrite = shf->wp - shf->buf;
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unsigned char *buf = shf->buf;
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int n;
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while (ntowrite > 0) {
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n = write(shf->fd, buf, ntowrite);
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if (n < 0) {
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if (errno == EINTR &&
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!(shf->flags & SHF_INTERRUPT))
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continue;
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shf->flags |= SHF_ERROR;
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shf->errno_ = errno;
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shf->wnleft = 0;
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if (buf != shf->buf) {
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/* allow a second flush
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* to work */
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memmove(shf->buf, buf,
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ntowrite);
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shf->wp = shf->buf + ntowrite;
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}
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return EOF;
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}
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buf += n;
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ntowrite -= n;
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}
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if (flags & EB_READSW) {
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shf->wp = shf->buf;
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shf->wnleft = 0;
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shf->flags &= ~SHF_WRITING;
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return 0;
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}
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}
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shf->wp = shf->buf;
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shf->wnleft = shf->wbsize;
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}
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shf->flags |= SHF_WRITING;
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return ret;
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}
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/* Fill up a read buffer. Returns EOF for a read error, 0 otherwise. */
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static int
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shf_fillbuf(struct shf *shf)
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{
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if (shf->flags & SHF_STRING)
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return 0;
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if (shf->fd < 0)
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internal_errorf("shf_fillbuf: no fd");
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if (shf->flags & (SHF_EOF | SHF_ERROR)) {
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if (shf->flags & SHF_ERROR)
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errno = shf->errno_;
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return EOF;
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}
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if ((shf->flags & SHF_WRITING) && shf_emptybuf(shf, EB_READSW) == EOF)
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return EOF;
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shf->flags |= SHF_READING;
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shf->rp = shf->buf;
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while (1) {
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shf->rnleft = blocking_read(shf->fd, (char *) shf->buf,
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shf->rbsize);
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if (shf->rnleft < 0 && errno == EINTR &&
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!(shf->flags & SHF_INTERRUPT))
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continue;
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break;
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}
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if (shf->rnleft <= 0) {
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if (shf->rnleft < 0) {
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shf->flags |= SHF_ERROR;
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shf->errno_ = errno;
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shf->rnleft = 0;
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shf->rp = shf->buf;
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return EOF;
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}
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shf->flags |= SHF_EOF;
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}
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return 0;
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}
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/* Read a buffer from shf. Returns the number of bytes read into buf,
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* if no bytes were read, returns 0 if end of file was seen, EOF if
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* a read error occurred.
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*/
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int
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shf_read(char *buf, int bsize, struct shf *shf)
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{
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int orig_bsize = bsize;
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int ncopy;
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if (!(shf->flags & SHF_RD))
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internal_errorf("shf_read: flags %x", shf->flags);
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if (bsize <= 0)
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internal_errorf("shf_read: bsize %d", bsize);
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while (bsize > 0) {
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if (shf->rnleft == 0 &&
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(shf_fillbuf(shf) == EOF || shf->rnleft == 0))
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break;
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ncopy = shf->rnleft;
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if (ncopy > bsize)
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ncopy = bsize;
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memcpy(buf, shf->rp, ncopy);
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buf += ncopy;
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bsize -= ncopy;
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shf->rp += ncopy;
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shf->rnleft -= ncopy;
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}
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/* Note: fread(3S) returns 0 for errors - this doesn't */
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return orig_bsize == bsize ? (shf_error(shf) ? EOF : 0) :
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orig_bsize - bsize;
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}
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/* Read up to a newline or EOF. The newline is put in buf; buf is always
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* null terminated. Returns NULL on read error or if nothing was read before
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* end of file, returns a pointer to the null byte in buf otherwise.
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*/
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char *
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shf_getse(char *buf, int bsize, struct shf *shf)
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{
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unsigned char *end;
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int ncopy;
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char *orig_buf = buf;
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if (!(shf->flags & SHF_RD))
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internal_errorf("shf_getse: flags %x", shf->flags);
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if (bsize <= 0)
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return NULL;
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--bsize; /* save room for null */
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do {
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if (shf->rnleft == 0) {
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if (shf_fillbuf(shf) == EOF)
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return NULL;
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if (shf->rnleft == 0) {
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*buf = '\0';
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return buf == orig_buf ? NULL : buf;
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}
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}
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end = (unsigned char *)memchr((char *) shf->rp, '\n',
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shf->rnleft);
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ncopy = end ? end - shf->rp + 1 : shf->rnleft;
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if (ncopy > bsize)
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ncopy = bsize;
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memcpy(buf, (char *) shf->rp, ncopy);
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shf->rp += ncopy;
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shf->rnleft -= ncopy;
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buf += ncopy;
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bsize -= ncopy;
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} while (!end && bsize);
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*buf = '\0';
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return buf;
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}
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|
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/* Returns the char read. Returns EOF for error and end of file. */
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int
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shf_getchar(struct shf *shf)
|
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{
|
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if (!(shf->flags & SHF_RD))
|
|
internal_errorf("shf_getchar: flags %x", shf->flags);
|
|
|
|
if (shf->rnleft == 0 && (shf_fillbuf(shf) == EOF || shf->rnleft == 0))
|
|
return EOF;
|
|
--shf->rnleft;
|
|
return *shf->rp++;
|
|
}
|
|
|
|
/* Put a character back in the input stream. Returns the character if
|
|
* successful, EOF if there is no room.
|
|
*/
|
|
int
|
|
shf_ungetc(int c, struct shf *shf)
|
|
{
|
|
if (!(shf->flags & SHF_RD))
|
|
internal_errorf("shf_ungetc: flags %x", shf->flags);
|
|
|
|
if ((shf->flags & SHF_ERROR) || c == EOF ||
|
|
(shf->rp == shf->buf && shf->rnleft))
|
|
return EOF;
|
|
|
|
if ((shf->flags & SHF_WRITING) && shf_emptybuf(shf, EB_READSW) == EOF)
|
|
return EOF;
|
|
|
|
if (shf->rp == shf->buf)
|
|
shf->rp = shf->buf + shf->rbsize;
|
|
if (shf->flags & SHF_STRING) {
|
|
/* Can unget what was read, but not something different - we
|
|
* don't want to modify a string.
|
|
*/
|
|
if (shf->rp[-1] != c)
|
|
return EOF;
|
|
shf->flags &= ~SHF_EOF;
|
|
shf->rp--;
|
|
shf->rnleft++;
|
|
return c;
|
|
}
|
|
shf->flags &= ~SHF_EOF;
|
|
*--(shf->rp) = c;
|
|
shf->rnleft++;
|
|
return c;
|
|
}
|
|
|
|
/* Write a character. Returns the character if successful, EOF if
|
|
* the char could not be written.
|
|
*/
|
|
int
|
|
shf_putchar(int c, struct shf *shf)
|
|
{
|
|
if (!(shf->flags & SHF_WR))
|
|
internal_errorf("shf_putchar: flags %x", shf->flags);
|
|
|
|
if (c == EOF)
|
|
return EOF;
|
|
|
|
if (shf->flags & SHF_UNBUF) {
|
|
unsigned char cc = (unsigned char)c;
|
|
int n;
|
|
|
|
if (shf->fd < 0)
|
|
internal_errorf("shf_putchar: no fd");
|
|
if (shf->flags & SHF_ERROR) {
|
|
errno = shf->errno_;
|
|
return EOF;
|
|
}
|
|
while ((n = write(shf->fd, &cc, 1)) != 1)
|
|
if (n < 0) {
|
|
if (errno == EINTR &&
|
|
!(shf->flags & SHF_INTERRUPT))
|
|
continue;
|
|
shf->flags |= SHF_ERROR;
|
|
shf->errno_ = errno;
|
|
return EOF;
|
|
}
|
|
} else {
|
|
/* Flush deals with strings and sticky errors */
|
|
if (shf->wnleft == 0 && shf_emptybuf(shf, EB_GROW) == EOF)
|
|
return EOF;
|
|
shf->wnleft--;
|
|
*shf->wp++ = c;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
/* Write a string. Returns the length of the string if successful, EOF if
|
|
* the string could not be written.
|
|
*/
|
|
int
|
|
shf_puts(const char *s, struct shf *shf)
|
|
{
|
|
if (!s)
|
|
return EOF;
|
|
|
|
return shf_write(s, strlen(s), shf);
|
|
}
|
|
|
|
/* Write a buffer. Returns nbytes if successful, EOF if there is an error. */
|
|
int
|
|
shf_write(const char *buf, int nbytes, struct shf *shf)
|
|
{
|
|
int n, ncopy, orig_nbytes = nbytes;
|
|
|
|
if (!(shf->flags & SHF_WR))
|
|
internal_errorf("shf_write: flags %x", shf->flags);
|
|
|
|
if (nbytes < 0)
|
|
internal_errorf("shf_write: nbytes %d", nbytes);
|
|
|
|
/* Don't buffer if buffer is empty and we're writting a large amount. */
|
|
if ((ncopy = shf->wnleft) &&
|
|
(shf->wp != shf->buf || nbytes < shf->wnleft)) {
|
|
if (ncopy > nbytes)
|
|
ncopy = nbytes;
|
|
memcpy(shf->wp, buf, ncopy);
|
|
nbytes -= ncopy;
|
|
buf += ncopy;
|
|
shf->wp += ncopy;
|
|
shf->wnleft -= ncopy;
|
|
}
|
|
if (nbytes > 0) {
|
|
/* Flush deals with strings and sticky errors */
|
|
if (shf_emptybuf(shf, EB_GROW) == EOF)
|
|
return EOF;
|
|
if (nbytes > shf->wbsize) {
|
|
ncopy = nbytes;
|
|
if (shf->wbsize)
|
|
ncopy -= nbytes % shf->wbsize;
|
|
nbytes -= ncopy;
|
|
while (ncopy > 0) {
|
|
n = write(shf->fd, buf, ncopy);
|
|
if (n < 0) {
|
|
if (errno == EINTR &&
|
|
!(shf->flags & SHF_INTERRUPT))
|
|
continue;
|
|
shf->flags |= SHF_ERROR;
|
|
shf->errno_ = errno;
|
|
shf->wnleft = 0;
|
|
/* Note: fwrite(3S) returns 0 for
|
|
* errors - this doesn't */
|
|
return EOF;
|
|
}
|
|
buf += n;
|
|
ncopy -= n;
|
|
}
|
|
}
|
|
if (nbytes > 0) {
|
|
memcpy(shf->wp, buf, nbytes);
|
|
shf->wp += nbytes;
|
|
shf->wnleft -= nbytes;
|
|
}
|
|
}
|
|
|
|
return orig_nbytes;
|
|
}
|
|
|
|
int
|
|
shf_fprintf(struct shf *shf, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int n;
|
|
|
|
va_start(args, fmt);
|
|
n = shf_vfprintf(shf, fmt, args);
|
|
va_end(args);
|
|
|
|
return n;
|
|
}
|
|
|
|
int
|
|
shf_snprintf(char *buf, int bsize, const char *fmt, ...)
|
|
{
|
|
struct shf shf;
|
|
va_list args;
|
|
int n;
|
|
|
|
if (!buf || bsize <= 0)
|
|
internal_errorf("shf_snprintf: buf %p, bsize %d", buf, bsize);
|
|
|
|
shf_sopen(buf, bsize, SHF_WR, &shf);
|
|
va_start(args, fmt);
|
|
n = shf_vfprintf(&shf, fmt, args);
|
|
va_end(args);
|
|
shf_sclose(&shf); /* null terminates */
|
|
return n;
|
|
}
|
|
|
|
char *
|
|
shf_smprintf(const char *fmt, ...)
|
|
{
|
|
struct shf shf;
|
|
va_list args;
|
|
|
|
shf_sopen(NULL, 0, SHF_WR|SHF_DYNAMIC, &shf);
|
|
va_start(args, fmt);
|
|
shf_vfprintf(&shf, fmt, args);
|
|
va_end(args);
|
|
return shf_sclose(&shf); /* null terminates */
|
|
}
|
|
|
|
#undef FP /* if you want floating point stuff */
|
|
|
|
#ifndef DMAXEXP
|
|
# define DMAXEXP 128 /* should be big enough */
|
|
#endif
|
|
|
|
#define BUF_SIZE 128
|
|
/* must be > MAX(DMAXEXP, log10(pow(2, DSIGNIF))) + ceil(log10(DMAXEXP)) + 8
|
|
* (I think); since it's hard to express as a constant, just use a large buffer
|
|
*/
|
|
#define FPBUF_SIZE (DMAXEXP+16)
|
|
|
|
#define FL_HASH 0x001 /* '#' seen */
|
|
#define FL_PLUS 0x002 /* '+' seen */
|
|
#define FL_RIGHT 0x004 /* '-' seen */
|
|
#define FL_BLANK 0x008 /* ' ' seen */
|
|
#define FL_SHORT 0x010 /* 'h' seen */
|
|
#define FL_LONG 0x020 /* 'l' seen */
|
|
#define FL_ZERO 0x040 /* '0' seen */
|
|
#define FL_DOT 0x080 /* '.' seen */
|
|
#define FL_UPPER 0x100 /* format character was uppercase */
|
|
#define FL_NUMBER 0x200 /* a number was formated %[douxefg] */
|
|
|
|
|
|
int
|
|
shf_vfprintf(struct shf *shf, const char *fmt, va_list args)
|
|
{
|
|
const char *s;
|
|
char c, *cp;
|
|
int tmp = 0, field, precision, len, flags;
|
|
unsigned long lnum;
|
|
/* %#o produces the longest output */
|
|
char numbuf[(8 * sizeof(long) + 2) / 3 + 1];
|
|
/* this stuff for dealing with the buffer */
|
|
int nwritten = 0;
|
|
|
|
if (!fmt)
|
|
return 0;
|
|
|
|
while ((c = *fmt++)) {
|
|
if (c != '%') {
|
|
shf_putc(c, shf);
|
|
nwritten++;
|
|
continue;
|
|
}
|
|
/*
|
|
* This will accept flags/fields in any order - not
|
|
* just the order specified in printf(3), but this is
|
|
* the way _doprnt() seems to work (on bsd and sysV).
|
|
* The only restriction is that the format character must
|
|
* come last :-).
|
|
*/
|
|
flags = field = precision = 0;
|
|
for ( ; (c = *fmt++) ; ) {
|
|
switch (c) {
|
|
case '#':
|
|
flags |= FL_HASH;
|
|
continue;
|
|
|
|
case '+':
|
|
flags |= FL_PLUS;
|
|
continue;
|
|
|
|
case '-':
|
|
flags |= FL_RIGHT;
|
|
continue;
|
|
|
|
case ' ':
|
|
flags |= FL_BLANK;
|
|
continue;
|
|
|
|
case '0':
|
|
if (!(flags & FL_DOT))
|
|
flags |= FL_ZERO;
|
|
continue;
|
|
|
|
case '.':
|
|
flags |= FL_DOT;
|
|
precision = 0;
|
|
continue;
|
|
|
|
case '*':
|
|
tmp = va_arg(args, int);
|
|
if (flags & FL_DOT)
|
|
precision = tmp;
|
|
else if ((field = tmp) < 0) {
|
|
field = -field;
|
|
flags |= FL_RIGHT;
|
|
}
|
|
continue;
|
|
|
|
case 'l':
|
|
flags |= FL_LONG;
|
|
continue;
|
|
|
|
case 'h':
|
|
flags |= FL_SHORT;
|
|
continue;
|
|
}
|
|
if (ksh_isdigit(c)) {
|
|
tmp = c - '0';
|
|
while (c = *fmt++, ksh_isdigit(c))
|
|
tmp = tmp * 10 + c - '0';
|
|
--fmt;
|
|
if (tmp < 0) /* overflow? */
|
|
tmp = 0;
|
|
if (flags & FL_DOT)
|
|
precision = tmp;
|
|
else
|
|
field = tmp;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (precision < 0)
|
|
precision = 0;
|
|
|
|
if (!c) /* nasty format */
|
|
break;
|
|
|
|
if (c >= 'A' && c <= 'Z') {
|
|
flags |= FL_UPPER;
|
|
c = c - 'A' + 'a';
|
|
}
|
|
|
|
switch (c) {
|
|
case 'p': /* pointer */
|
|
flags &= ~(FL_LONG | FL_SHORT);
|
|
flags |= (sizeof(char *) > sizeof(int)) ?
|
|
/* hope it fits.. */ FL_LONG : 0;
|
|
/* aaahhh... */
|
|
case 'd':
|
|
case 'i':
|
|
case 'o':
|
|
case 'u':
|
|
case 'x':
|
|
flags |= FL_NUMBER;
|
|
cp = numbuf + sizeof (numbuf);
|
|
/*-
|
|
* XXX any better way to do this?
|
|
* XXX hopefully the compiler optimises this out
|
|
*
|
|
* For shorts, we want sign extend for %d but not
|
|
* for %[oxu] - on 16 bit machines it doesn't matter.
|
|
* Assumes C compiler has converted shorts to ints
|
|
* before pushing them. XXX optimise this -tg
|
|
*/
|
|
if (flags & FL_LONG)
|
|
lnum = va_arg(args, unsigned long);
|
|
else if ((sizeof (int) < sizeof (long)) && (c == 'd'))
|
|
lnum = (long) va_arg(args, int);
|
|
else
|
|
lnum = va_arg(args, unsigned int);
|
|
switch (c) {
|
|
case 'd':
|
|
case 'i':
|
|
if (0 > (long) lnum)
|
|
lnum = - (long) lnum, tmp = 1;
|
|
else
|
|
tmp = 0;
|
|
/* aaahhhh..... */
|
|
|
|
case 'u':
|
|
do {
|
|
*--cp = lnum % 10 + '0';
|
|
lnum /= 10;
|
|
} while (lnum);
|
|
|
|
if (c != 'u') {
|
|
if (tmp)
|
|
*--cp = '-';
|
|
else if (flags & FL_PLUS)
|
|
*--cp = '+';
|
|
else if (flags & FL_BLANK)
|
|
*--cp = ' ';
|
|
}
|
|
break;
|
|
|
|
case 'o':
|
|
do {
|
|
*--cp = (lnum & 0x7) + '0';
|
|
lnum >>= 3;
|
|
} while (lnum);
|
|
|
|
if ((flags & FL_HASH) && *cp != '0')
|
|
*--cp = '0';
|
|
break;
|
|
|
|
case 'p':
|
|
case 'x':
|
|
{
|
|
const char *digits = (flags & FL_UPPER) ?
|
|
"0123456789ABCDEF" :
|
|
"0123456789abcdef";
|
|
do {
|
|
*--cp = digits[lnum & 0xf];
|
|
lnum >>= 4;
|
|
} while (lnum);
|
|
|
|
if (flags & FL_HASH) {
|
|
*--cp = (flags & FL_UPPER) ? 'X' : 'x';
|
|
*--cp = '0';
|
|
}
|
|
}
|
|
}
|
|
len = numbuf + sizeof (numbuf) - (s = cp);
|
|
if (flags & FL_DOT) {
|
|
if (precision > len) {
|
|
field = precision;
|
|
flags |= FL_ZERO;
|
|
} else
|
|
precision = len; /* no loss */
|
|
}
|
|
break;
|
|
|
|
case 's':
|
|
if (!(s = va_arg(args, const char *)))
|
|
s = "(null)";
|
|
len = utf_mbswidth(s);
|
|
break;
|
|
|
|
case 'c':
|
|
flags &= ~FL_DOT;
|
|
numbuf[0] = (char)(va_arg(args, int));
|
|
s = numbuf;
|
|
len = 1;
|
|
break;
|
|
|
|
case '%':
|
|
default:
|
|
numbuf[0] = c;
|
|
s = numbuf;
|
|
len = 1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* At this point s should point to a string that is to be
|
|
* formatted, and len should be the length of the string.
|
|
*/
|
|
if (!(flags & FL_DOT) || len < precision)
|
|
precision = len;
|
|
if (field > precision) {
|
|
field -= precision;
|
|
if (!(flags & FL_RIGHT)) {
|
|
field = -field;
|
|
/* skip past sign or 0x when padding with 0 */
|
|
if ((flags & FL_ZERO) && (flags & FL_NUMBER)) {
|
|
if (*s == '+' || *s == '-' ||
|
|
*s == ' ') {
|
|
shf_putc(*s, shf);
|
|
s++;
|
|
precision--;
|
|
nwritten++;
|
|
} else if (*s == '0') {
|
|
shf_putc(*s, shf);
|
|
s++;
|
|
nwritten++;
|
|
if (--precision > 0 &&
|
|
(*s | 0x20) == 'x') {
|
|
shf_putc(*s, shf);
|
|
s++;
|
|
precision--;
|
|
nwritten++;
|
|
}
|
|
}
|
|
c = '0';
|
|
} else
|
|
c = flags & FL_ZERO ? '0' : ' ';
|
|
if (field < 0) {
|
|
nwritten += -field;
|
|
for ( ; field < 0 ; field++)
|
|
shf_putc(c, shf);
|
|
}
|
|
} else
|
|
c = ' ';
|
|
} else
|
|
field = 0;
|
|
|
|
if (precision > 0) {
|
|
const char *q;
|
|
|
|
nwritten += precision;
|
|
q = utf_skipcols(s, precision);
|
|
do {
|
|
shf_putc(*s, shf);
|
|
} while (++s < q);
|
|
}
|
|
if (field > 0) {
|
|
nwritten += field;
|
|
for ( ; field > 0 ; --field)
|
|
shf_putc(c, shf);
|
|
}
|
|
}
|
|
|
|
return shf_error(shf) ? EOF : nwritten;
|
|
}
|
|
|
|
#ifdef MKSH_SMALL
|
|
int
|
|
shf_getc(struct shf *shf)
|
|
{
|
|
return ((shf)->rnleft > 0 ? (shf)->rnleft--, *(shf)->rp++ :
|
|
shf_getchar(shf));
|
|
}
|
|
|
|
int
|
|
shf_putc(int c, struct shf *shf)
|
|
{
|
|
return ((shf)->wnleft == 0 ? shf_putchar((c), (shf)) :
|
|
((shf)->wnleft--, *(shf)->wp++ = (c)));
|
|
}
|
|
#endif
|