--- /dev/null
+/* -*-c-*-
+ *
+ * $Id$
+ *
+ * Buffer handling
+ *
+ * (c) 2001 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <string.h>
+
+#include "mp.h"
+#include "ec.h"
+#include "buf.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @buf_init@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @void *p@ = pointer to a buffer
+ * @size_t sz@ = size of the buffer
+ *
+ * Returns: ---
+ *
+ * Use: Initializes the buffer block appropriately.
+ */
+
+void buf_init(buf *b, void *p, size_t sz)
+{
+ b->base = b->p = p;
+ b->limit = b->p + sz;
+ b->f = 0;
+}
+
+/* --- @buf_break@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ *
+ * Returns: Some negative value.
+ *
+ * Use: Marks a buffer as broken.
+ */
+
+int buf_break(buf *b) { b->f |= BF_BROKEN; return (-1); }
+
+/* --- @buf_flip@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ *
+ * Returns: ---
+ *
+ * Use: Flips a buffer so that if you've just been writing to it,
+ * you can now read from the bit you've written.
+ */
+
+void buf_flip(buf *b)
+{
+ b->limit = b->p;
+ b->p = b->base;
+}
+
+/* --- @buf_ensure@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @size_t sz@ = size of data wanted
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Ensures that there are @sz@ bytes still in the buffer.
+ */
+
+int buf_ensure(buf *b, size_t sz) { return (BENSURE(b, sz)); }
+
+/* --- @buf_get@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @size_t sz@ = size of the buffer
+ *
+ * Returns: Pointer to the place in the buffer.
+ *
+ * Use: Reserves a space in the buffer of the requested size, and
+ * returns its start address.
+ */
+
+void *buf_get(buf *b, size_t sz)
+{
+ void *p;
+ if (BENSURE(b, sz))
+ return (0);
+ p = BCUR(b);
+ BSTEP(b, sz);
+ return (p);
+}
+
+/* --- @buf_put@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @const void *p@ = pointer to a buffer
+ * @size_t sz@ = size of the buffer
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Fetches data from some place and puts it in the buffer
+ */
+
+int buf_put(buf *b, const void *p, size_t sz)
+{
+ if (BENSURE(b, sz))
+ return (-1);
+ memcpy(BCUR(b), p, sz);
+ BSTEP(b, sz);
+ return (0);
+}
+
+/* --- @buf_getbyte@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ *
+ * Returns: A byte, or less than zero if there wasn't a byte there.
+ *
+ * Use: Gets a single byte from a buffer.
+ */
+
+int buf_getbyte(buf *b)
+{
+ if (BENSURE(b, 1))
+ return (-1);
+ return (*b->p++);
+}
+
+/* --- @buf_putbyte@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @int ch@ = byte to write
+ *
+ * Returns: Zero if OK, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a single byte in a buffer.
+ */
+
+int buf_putbyte(buf *b, int ch)
+{
+ if (BENSURE(b, 1))
+ return (-1);
+ *b->p++ = ch;
+ return (0);
+}
+
+/* --- @buf_getu16@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @uint16 *w@ = where to put the word
+ *
+ * Returns: Zero if OK, or nonzero if there wasn't a word there.
+ *
+ * Use: Gets a 16-bit word from a buffer.
+ */
+
+int buf_getu16(buf *b, uint16 *w)
+{
+ if (BENSURE(b, 2))
+ return (-1);
+ *w = LOAD16(b->p);
+ BSTEP(b, 2);
+ return (0);
+}
+
+/* --- @buf_putu16@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @uint16 w@ = word to write
+ *
+ * Returns: Zero if OK, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a 16-but word in a buffer.
+ */
+
+int buf_putu16(buf *b, uint16 w)
+{
+ if (BENSURE(b, 2))
+ return (-1);
+ STORE16(b->p, w);
+ BSTEP(b, 2);
+ return (0);
+}
+
+/* --- @buf_getu32@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @uint32 *w@ = where to put the word
+ *
+ * Returns: Zero if OK, or nonzero if there wasn't a word there.
+ *
+ * Use: Gets a 32-bit word from a buffer.
+ */
+
+int buf_getu32(buf *b, uint32 *w)
+{
+ if (BENSURE(b, 4))
+ return (-1);
+ *w = LOAD32(b->p);
+ BSTEP(b, 4);
+ return (0);
+}
+
+/* --- @buf_putu32@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @uint32 w@ = word to write
+ *
+ * Returns: Zero if OK, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a 32-but word in a buffer.
+ */
+
+int buf_putu32(buf *b, uint32 w)
+{
+ if (BENSURE(b, 4))
+ return (-1);
+ STORE32(b->p, w);
+ BSTEP(b, 4);
+ return (0);
+}
+
+/* --- @findz@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @size_t *nn@ = where to put the length
+ *
+ * Returns: Zero if OK, nonzero if there wasn't a null byte to be found.
+ *
+ * Use: Finds a terminating null byte.
+ */
+
+static int findz(buf *b, size_t *nn)
+{
+ octet *p;
+
+ if ((p = memchr(BCUR(b), 0, BLEN(b))) == 0) {
+ buf_break(b);
+ return (-1);
+ }
+ *nn = p - BCUR(b);
+ return (0);
+}
+
+#define DOSUFFIXES(DO) DO(8) DO(16) DO(32) DO(z)
+
+/* --- @buf_getmem{8,16,32,z} --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @size_t *nn@ = where to put the length
+ *
+ * Returns: Pointer to the buffer data, or null.
+ *
+ * Use: Gets a chunk of memory from a buffer. The number, @16@ or
+ * @32@, is the width of the length; @z@ means null-terminated.
+ */
+
+void *buf_getmem8(buf *b, size_t *nn)
+{
+ int n;
+
+ if ((n = buf_getbyte(b)) < 0) return (0);
+ *nn = n;
+ return (buf_get(b, n));
+}
+
+void *buf_getmem16(buf *b, size_t *nn)
+{
+ uint16 n;
+
+ if (buf_getu16(b, &n)) return (0);
+ *nn = n;
+ return (buf_get(b, n));
+}
+
+void *buf_getmem32(buf *b, size_t *nn)
+{
+ uint32 n;
+
+ if (buf_getu32(b, &n)) return (0);
+ *nn = n;
+ return (buf_get(b, n));
+}
+
+void *buf_getmemz(buf *b, size_t *nn)
+{
+ if (findz(b, nn)) return (0);
+ return (buf_get(b, *nn));
+}
+
+/* --- @buf_putmem{8,16,32,z} --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @const void *p@ = pointer to data to write
+ * @size_t n@ = length to write
+ *
+ * Returns: Zero if OK, nonzero if there wasn't enough space.
+ *
+ * Use: Writes a chunk of data to a buffer. The number, @16@ or
+ * @32@, is the width of the length; @z@ means null-terminated.
+ */
+
+int buf_putmem8(buf *b, const void *p, size_t n)
+{
+ assert(n <= 0xfful);
+ if (buf_putbyte(b, n) || buf_put(b, p, n))
+ return (-1);
+ return (0);
+}
+
+int buf_putmem16(buf *b, const void *p, size_t n)
+{
+ assert(n <= 0xfffful);
+ if (buf_putu16(b, n) || buf_put(b, p, n))
+ return (-1);
+ return (0);
+}
+
+int buf_putmem32(buf *b, const void *p, size_t n)
+{
+ assert(n <= 0xfffffffful);
+ if (buf_putu32(b, n) || buf_put(b, p, n))
+ return (-1);
+ return (0);
+}
+
+int buf_putmemz(buf *b, const void *p, size_t n)
+{
+ octet *q;
+
+ assert(!memchr(p, 0, n));
+ if ((q = buf_get(b, n + 1)) == 0)
+ return (-1);
+ memcpy(q, p, n);
+ q[n] = 0;
+ return (0);
+}
+
+/* --- @buf_getbuf{8,16,32,z}@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @buf *bb@ = where to put the result
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Gets a block of data from a buffer, and writes its bounds to
+ * another buffer. The number, @16@ or @32@, is the width of
+ * the length; @z@ means null-terminated.
+ */
+
+#define GETBUF(suff) int buf_getbuf##suff(buf *b, buf *bb) \
+{ \
+ void *p; \
+ size_t n; \
+ \
+ if ((p = buf_getmem##suff(b, &n)) == 0) \
+ return (-1); \
+ buf_init(bb, p, n); \
+ return (0); \
+}
+DOSUFFIXES(GETBUF)
+
+/* --- @buf_putbuf{8,16,32,z}@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @buf *bb@ = buffer to write
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Puts the contents of a buffer to a buffer. The number, @16@
+ * or @32@, is the width of the length; @z@ means null-
+ * terminated.
+ */
+
+#define PUTBUF(suff) int buf_putbuf##suff(buf *b, buf *bb) \
+ { return (buf_putmem##suff(b, BBASE(bb), BLEN(bb))); }
+DOSUFFIXES(PUTBUF)
+
+/* --- @buf_getstr{8,16,32,z}@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @dstr *d@ = where to put the result
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Gets a block of data from a buffer, and writes its contents
+ * to a string. The number, @16@ or @32@, is the width of the
+ * length; @z@ means null-terminated.
+ */
+
+#define GETSTR(suff) int buf_getstr##suff(buf *b, dstr *d) \
+{ \
+ void *p; \
+ size_t n; \
+ \
+ if ((p = buf_getmem##suff(b, &n)) == 0) \
+ return (-1); \
+ DPUTM(d, p, n); \
+ return (0); \
+}
+DOSUFFIXES(GETSTR)
+
+/* --- @buf_putstr{8,16,32,z}@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @dstr *d@ = string to write
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a string to a buffer, and writes its bounds to
+ * another buffer. The number, @16@ or @32@, is the width of
+ * the length; @z@ means null-terminated.
+ */
+
+#define PUTSTR(suff) int buf_putstr##suff(buf *b, dstr *d) \
+ { return (buf_putmem##suff(b, d->buf, d->len)); }
+DOSUFFIXES(PUTSTR)
+
+/* --- @buf_getmp@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ *
+ * Returns: A multiprecision integer, or null if there wasn't one there.
+ *
+ * Use: Gets a multiprecision integer from a buffer.
+ */
+
+mp *buf_getmp(buf *b)
+{
+ uint16 sz;
+ size_t n;
+ mp *m;
+ if (buf_getu16(b, &sz) || buf_ensure(b, sz))
+ return (0);
+ m = mp_loadb(MP_NEW, BCUR(b), sz);
+ n = mp_octets(m);
+ if (n != sz && n != 0 && sz != 1) {
+ mp_drop(m);
+ return (0);
+ }
+ BSTEP(b, sz);
+ return (m);
+}
+
+/* --- @buf_putmp@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @mp *m@ = a multiprecision integer
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a multiprecision integer to a buffer.
+ */
+
+int buf_putmp(buf *b, mp *m)
+{
+ size_t sz = mp_octets(m);
+ assert(sz < MASK16);
+ if (!sz) sz = 1;
+ if (buf_putu16(b, sz) || buf_ensure(b, sz))
+ return (-1);
+ mp_storeb(m, BCUR(b), sz);
+ BSTEP(b, sz);
+ return (0);
+}
+
+/* --- @buf_getec@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @ec *p@ = where to put the point
+ *
+ * Returns: Zero if it worked, nonzero if it failed.
+ *
+ * Use: Gets a multiprecision integer from a buffer. The point must
+ * be initialized.
+ */
+
+int buf_getec(buf *b, ec *p)
+{
+ mp *x = 0, *y = 0;
+ uint16 n;
+ if (buf_ensure(b, 2)) return (-1);
+ n = LOAD16(BCUR(b)); if (!n) { BSTEP(b, 2); EC_SETINF(p); return (0); }
+ if ((x = buf_getmp(b)) == 0 || (y = buf_getmp(b)) == 0) {
+ mp_drop(x); mp_drop(y); return (-1);
+ }
+ EC_DESTROY(p); p->x = x; p->y = y; p->z = 0;
+ return (0);
+}
+
+/* --- @buf_putec@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @ec *p@ = an elliptic curve point
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Puts an elliptic curve point to a buffer.
+ */
+
+int buf_putec(buf *b, ec *p)
+{
+ if (EC_ATINF(p)) return (buf_putu16(b, 0));
+ if (buf_putmp(b, p->x) || buf_putmp(b, p->y)) return (-1);
+ return (0);
+}
+
+/*----- That's all, folks -------------------------------------------------*/
--- /dev/null
+/* -*-c-*-
+ *
+ * $Id$
+ *
+ * Reading and writing packet buffers
+ *
+ * (c) 2001 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#ifndef CATACOMB_BUF_H
+#define CATACOMB_BUF_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <stddef.h>
+
+#include <mLib/bits.h>
+
+#ifndef CATACOMB_MP_H
+# include "mp.h"
+#endif
+
+#ifndef CATACOMB_EC_H
+# include "ec.h"
+#endif
+
+/*----- Data structures ---------------------------------------------------*/
+
+/* --- Buffers --- *
+ *
+ * Buffers provide a simple stream-like interface for building and parsing
+ * packets.
+ */
+
+typedef struct buf {
+ octet *base, *p, *limit; /* Pointers to the buffer */
+ unsigned f; /* Various flags */
+} buf;
+
+#define BF_BROKEN 1u /* Buffer is broken */
+
+/*----- Useful macros -----------------------------------------------------*/
+
+#define BBASE(b) ((b)->base)
+#define BLIM(b) ((b)->limit)
+#define BCUR(b) ((b)->p)
+#define BSZ(b) ((b)->limit - (b)->base)
+#define BLEN(b) ((b)->p - (b)->base)
+#define BLEFT(b) ((b)->limit - (b)->p)
+#define BSTEP(b, sz) ((b)->p += (sz))
+#define BBAD(b) ((b)->f & BF_BROKEN)
+#define BOK(b) (!BBAD(b))
+
+#define BENSURE(b, sz) \
+ (BBAD(b) ? -1 : (sz) > BLEFT(b) ? (b)->f |= BF_BROKEN, -1 : 0)
+
+/*----- Functions provided ------------------------------------------------*/
+
+/* --- @buf_init@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @void *p@ = pointer to a buffer
+ * @size_t sz@ = size of the buffer
+ *
+ * Returns: ---
+ *
+ * Use: Initializes the buffer block appropriately.
+ */
+
+extern void buf_init(buf */*b*/, void */*p*/, size_t /*sz*/);
+
+/* --- @buf_break@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ *
+ * Returns: Some negative value.
+ *
+ * Use: Marks a buffer as broken.
+ */
+
+extern int buf_break(buf */*b*/);
+
+/* --- @buf_flip@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ *
+ * Returns: ---
+ *
+ * Use: Flips a buffer so that if you've just been writing to it,
+ * you can now read from the bit you've written.
+ */
+
+extern void buf_flip(buf */*b*/);
+
+/* --- @buf_ensure@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @size_t sz@ = size of data wanted
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Ensures that there are @sz@ bytes still in the buffer.
+ */
+
+extern int buf_ensure(buf */*b*/, size_t /*sz*/);
+
+/* --- @buf_get@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @size_t sz@ = size of the buffer
+ *
+ * Returns: Pointer to the place in the buffer.
+ *
+ * Use: Reserves a space in the buffer of the requested size, and
+ * returns its start address.
+ */
+
+extern void *buf_get(buf */*b*/, size_t /*sz*/);
+
+/* --- @buf_put@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @const void *p@ = pointer to a buffer
+ * @size_t sz@ = size of the buffer
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Fetches data from some place and puts it in the buffer
+ */
+
+extern int buf_put(buf */*b*/, const void */*p*/, size_t /*sz*/);
+
+/* --- @buf_getbyte@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ *
+ * Returns: A byte, or less than zero if there wasn't a byte there.
+ *
+ * Use: Gets a single byte from a buffer.
+ */
+
+extern int buf_getbyte(buf */*b*/);
+
+/* --- @buf_putbyte@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @int ch@ = byte to write
+ *
+ * Returns: Zero if OK, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a single byte in a buffer.
+ */
+
+extern int buf_putbyte(buf */*b*/, int /*ch*/);
+
+/* --- @buf_getu16@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @uint16 *w@ = where to put the word
+ *
+ * Returns: Zero if OK, or nonzero if there wasn't a word there.
+ *
+ * Use: Gets a 16-bit word from a buffer.
+ */
+
+extern int buf_getu16(buf */*b*/, uint16 */*w*/);
+
+/* --- @buf_putu16@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @uint16 w@ = word to write
+ *
+ * Returns: Zero if OK, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a 16-but word in a buffer.
+ */
+
+extern int buf_putu16(buf */*b*/, uint16 /*w*/);
+
+/* --- @buf_getu32@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @uint32 *w@ = where to put the word
+ *
+ * Returns: Zero if OK, or nonzero if there wasn't a word there.
+ *
+ * Use: Gets a 32-bit word from a buffer.
+ */
+
+extern int buf_getu32(buf */*b*/, uint32 */*w*/);
+
+/* --- @buf_putu32@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @uint32 w@ = word to write
+ *
+ * Returns: Zero if OK, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a 32-but word in a buffer.
+ */
+
+extern int buf_putu32(buf */*b*/, uint32 /*w*/);
+
+/* --- @buf_getmem{8,16,32,z} --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @size_t *nn@ = where to put the length
+ *
+ * Returns: Pointer to the buffer data, or null.
+ *
+ * Use: Gets a chunk of memory from a buffer. The number, @16@ or
+ * @32@, is the width of the length; @z@ means null-terminated.
+ */
+
+extern void *buf_getmem8(buf */*b*/, size_t */*nn*/);
+extern void *buf_getmem16(buf */*b*/, size_t */*nn*/);
+extern void *buf_getmem32(buf */*b*/, size_t */*nn*/);
+extern void *buf_getmemz(buf */*b*/, size_t */*nn*/);
+
+/* --- @buf_putmem{8,16,32,z} --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @const void *p@ = pointer to data to write
+ * @size_t n@ = length to write
+ *
+ * Returns: Zero if OK, nonzero if there wasn't enough space.
+ *
+ * Use: Writes a chunk of data to a buffer. The number, @16@ or
+ * @32@, is the width of the length; @z@ means null-terminated.
+ */
+
+extern int buf_putmem8(buf */*b*/, const void */*p*/, size_t /*n*/);
+extern int buf_putmem16(buf */*b*/, const void */*p*/, size_t /*n*/);
+extern int buf_putmem32(buf */*b*/, const void */*p*/, size_t /*n*/);
+extern int buf_putmemz(buf */*b*/, const void */*p*/, size_t /*n*/);
+
+/* --- @buf_getbuf{8,16,32,z}@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @buf *bb@ = where to put the result
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Gets a block of data from a buffer, and writes its bounds to
+ * another buffer. The number, @16@ or @32@, is the width of
+ * the length; @z@ means null-terminated.
+ */
+
+extern int buf_getbuf8(buf */*b*/, buf */*bb*/);
+extern int buf_getbuf16(buf */*b*/, buf */*bb*/);
+extern int buf_getbuf32(buf */*b*/, buf */*bb*/);
+extern int buf_getbufz(buf */*b*/, buf */*bb*/);
+
+/* --- @buf_putbuf{8,16,32,z}@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @buf *bb@ = buffer to write
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Puts the contents of a buffer to a buffer. The number, @16@
+ * or @32@, is the width of the length; @z@ means null-
+ * terminated.
+ */
+
+extern int buf_putbuf8(buf */*b*/, buf */*bb*/);
+extern int buf_putbuf16(buf */*b*/, buf */*bb*/);
+extern int buf_putbuf32(buf */*b*/, buf */*bb*/);
+extern int buf_putbufz(buf */*b*/, buf */*bb*/);
+
+/* --- @buf_getstr{8,16,32,z}@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @dstr *d@ = where to put the result
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Gets a block of data from a buffer, and writes its contents
+ * to a string. The number, @16@ or @32@, is the width of the
+ * length; @z@ means null-terminated.
+ */
+
+extern int buf_getstr8(buf */*b*/, dstr */*d*/);
+extern int buf_getstr16(buf */*b*/, dstr */*d*/);
+extern int buf_getstr32(buf */*b*/, dstr */*d*/);
+extern int buf_getstrz(buf */*b*/, dstr */*d*/);
+
+/* --- @buf_putstr{8,16,32,z}@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @dstr *d@ = string to write
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a string to a buffer, and writes its bounds to
+ * another buffer. The number, @16@ or @32@, is the width of
+ * the length; @z@ means null-terminated.
+ */
+
+extern int buf_putstr8(buf */*b*/, dstr */*d*/);
+extern int buf_putstr16(buf */*b*/, dstr */*d*/);
+extern int buf_putstr32(buf */*b*/, dstr */*d*/);
+extern int buf_putstrz(buf */*b*/, dstr */*d*/);
+
+/* --- @buf_getmp@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ *
+ * Returns: A multiprecision integer, or null if there wasn't one there.
+ *
+ * Use: Gets a multiprecision integer from a buffer.
+ */
+
+extern mp *buf_getmp(buf */*b*/);
+
+/* --- @buf_putmp@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @mp *m@ = a multiprecision integer
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Puts a multiprecision integer to a buffer.
+ */
+
+extern int buf_putmp(buf */*b*/, mp */*m*/);
+
+/* --- @buf_getec@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @ec *p@ = where to put the point
+ *
+ * Returns: Zero if it worked, nonzero if it failed.
+ *
+ * Use: Gets a multiprecision integer from a buffer. The point must
+ * be initialized.
+ */
+
+extern int buf_getec(buf */*b*/, ec */*p*/);
+
+/* --- @buf_putec@ --- *
+ *
+ * Arguments: @buf *b@ = pointer to a buffer block
+ * @ec *p@ = an elliptic curve point
+ *
+ * Returns: Zero if it worked, nonzero if there wasn't enough space.
+ *
+ * Use: Puts an elliptic curve point to a buffer.
+ */
+
+extern int buf_putec(buf */*b*/, ec */*p*/);
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
~mdw / mLib / commitdiff