--- /dev/null
+/* -*-c-*-
+ *
+ * Textual representation of multiprecision numbers
+ *
+ * (c) 1999 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_MPTEXT_H
+#define CATACOMB_MPTEXT_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/*----- Header files ------------------------------------------------------*/
+
+#ifndef CATACOMB_MP_H
+# include "mp.h"
+#endif
+
+/*----- Data structures ---------------------------------------------------*/
+
+typedef struct mptext_ops {
+ int (*get)(void */*p*/);
+ void (*unget)(int /*ch*/, void */*p*/);
+ int (*put)(const char */*s*/, size_t /*len*/, void */*p*/);
+} mptext_ops;
+
+/*----- Functions provided ------------------------------------------------*/
+
+/* --- @mp_read@ --- *
+ *
+ * Arguments: @mp *m@ = destination multiprecision number
+ * @int radix@ = base to assume for data (or zero to guess)
+ * @const mptext_ops *ops@ = pointer to operations block
+ * @void *p@ = data for the operations block
+ *
+ * Returns: The integer read, or zero if it didn't work.
+ *
+ * Use: Reads an integer from some source. If the @radix@ is
+ * specified, the number is assumed to be given in that radix,
+ * with the letters `a' (either upper- or lower-case) upwards
+ * standing for digits greater than 9. Otherwise, base 10 is
+ * assumed unless the number starts with `0' (octal), `0x' (hex)
+ * or `nnn_' (base `nnn'). An arbitrary amount of whitespace
+ * before the number is ignored.
+ */
+
+extern mp *mp_read(mp */*m*/, int /*radix*/,
+ const mptext_ops */*ops*/, void */*p*/);
+
+/* --- @mp_write@ --- *
+ *
+ * Arguments: @mp *m@ = pointer to a multi-precision integer
+ * @int radix@ = radix to use when writing the number out
+ * @const mptext_ops *ops@ = pointer to an operations block
+ * @void *p@ = data for the operations block
+ *
+ * Returns: Zero if it worked, nonzero otherwise.
+ *
+ * Use: Writes a large integer in textual form.
+ */
+
+extern int mp_write(mp */*m*/, int /*radix*/,
+ const mptext_ops */*ops*/, void */*p*/);
+
+/* --- @mptext_len@ --- *
+ *
+ * Arguments: @mp *x@ = number to work on
+ * @int r@ = radix the number will be expressed in
+ *
+ * Returns: The number of digits needed to represent the number in the
+ * given base. This will not include space for a leading sign
+ * (use @MP_NEGP@ to check that, or just add one on for luck);
+ * neither will it add space for a terminating null. In general
+ * the answer will be an overestimate.
+ */
+
+extern size_t mptext_len(mp */*x*/, int /*r*/);
+
+/*----- File I/O ----------------------------------------------------------*/
+
+#include <stdio.h>
+
+/* --- Operations table --- *
+ *
+ * The @mptext_fileops@ expect the pointer argument to be a @FILE *@.
+ */
+
+extern const mptext_ops mptext_fileops;
+
+/* --- Convenience functions --- */
+
+extern mp *mp_readfile(mp */*m*/, FILE */*fp*/, int /*radix*/);
+extern int mp_writefile(mp */*m*/, FILE */*fp*/, int /*radix*/);
+
+#define MP_DOFPRINTFR(fp, args, m, r) do { \
+ fprintf args; \
+ if (m) \
+ mp_writefile(m, fp, r); \
+ else \
+ fputs("<null>", fp); \
+ fputc('\n', fp); \
+} while (0)
+
+#define MP_DOFPRINTR(fp, name, m, r) \
+ MP_DOFPRINTFR(fp, (fp, "%s = ", name), m, r)
+
+#define MP_PRINT(name, m) MP_DOFPRINTR(stdout, name, m, 10)
+#define MP_EPRINT(name, m) MP_DOFPRINTR(stderr, name, m, 10)
+#define MP_PRINTX(name, m) MP_DOFPRINTR(stdout, name, m, 16)
+#define MP_EPRINTX(name, m) MP_DOFPRINTR(stderr, name, m, 16)
+
+#define MP_FPRINTF(fp, args, m) MP_DOFPRINTFR(fp, args, m, 10)
+#define MP_FPRINTFX(fp, args, m) MP_DOFPRINTFR(fp, args, m, 16)
+
+/*----- String I/O --------------------------------------------------------*/
+
+/* --- Context format --- */
+
+typedef struct mptext_stringctx {
+ char *buf;
+ char *lim;
+} mptext_stringctx;
+
+/* --- Operations table --- */
+
+extern const mptext_ops mptext_stringops;
+
+/* --- Convenience functions --- */
+
+extern mp *mp_readstring(mp */*m*/, const char */*p*/, char **/*end*/,
+ int /*radix*/);
+extern int mp_writestring(mp */*m*/, char */*p*/, size_t /*sz*/,
+ int /*radix*/);
+
+/*----- Dynamic string I/O ------------------------------------------------*/
+
+#include <mLib/dstr.h>
+
+/* --- Context format --- */
+
+typedef struct mptext_dstrctx {
+ dstr *d;
+ size_t i;
+} mptext_dstrctx;
+
+/* --- Operations table --- */
+
+extern const mptext_ops mptext_dstrops;
+
+/* --- Convenience functions --- */
+
+extern mp *mp_readdstr(mp */*m*/, dstr */*d*/, size_t */*off*/,
+ int /*radix*/);
+extern int mp_writedstr(mp */*m*/, dstr */*d*/, int /*radix*/);
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
projects / u / mdw / catacomb / blobdiff