1%%	options
2
3copyright owner	=	Dirk Krause
4copyright year	=	2015-xxxx
5SPDX-License-Identifier:	BSD-3-Clause
6
7
8
9%%	header
10
11/**	@file	dk4maodo.h	Octal output.
12*/
13
14#ifndef DK4CONF_H_INCLUDED
15#if DK4_BUILDING_DKTOOLS4
16#include "dk4conf.h"
17#else
18#include <dktools-4/dk4conf.h>
19#endif
20#endif
21
22#ifndef DK4TYPES_H_INCLUDED
23#if DK4_BUILDING_DKTOOLS4
24#include <libdk4base/dk4types.h>
25#else
26#include <dktools-4/dk4types.h>
27#endif
28#endif
29
30#ifndef DK4ERROR_H_INCLUDED
31#if DK4_BUILDING_DKTOOLS4
32#include <libdk4base/dk4error.h>
33#else
34#include <dktools-4/dk4error.h>
35#endif
36#endif
37
38#ifdef __cplusplus
39extern "C" {
40#endif
41
42/**	Write unsigned number to char string in octal notation.
43
44	CRT on Windows: Optional.
45	@param	dptr	Pointer to buffer for string.
46	@param	sz	Buffer size (number of char).
47	@param	val	Value to write.
48	@param	padsz	Minimum number of digits, 1 for automatic choice.
49	@param	erp	Error report, may be NULL.
50	@return	1 on success, 0 on error.
51*/
52int
53dk4ma_write_octal_unsigned(
54  dkChar *dptr, size_t sz, dk4_um_t val, size_t padsz, dk4_er_t *erp
55);
56
57#ifdef __cplusplus
58}
59#endif
60
61
62%%	module
63
64#include "dk4conf.h"
65#include <libdk4maiodh/dk4maodo.h>
66
67#if	DK4_HAVE_ASSERT_H
68#ifndef	ASSERT_H_INCLUDED
69#include <assert.h>
70#define	ASSERT_H_INCLUDED 1
71#endif
72#endif
73
74
75$!trace-include
76
77
78
79int
80dk4ma_write_octal_unsigned(
81  dkChar *dptr, size_t sz, dk4_um_t val, size_t padsz, dk4_er_t *erp
82)
83{
84  dkChar	 buf[4*sizeof(dk4_um_t)+16];	/* Buffer */
85  size_t	 used		= 0;		/* Number of used chars */
86  size_t	 i		= 0;		/* Copy buffer to destination */
87  int		 cc		= 1;		/* Flag: Can continue */
88  int		 err		= 0;		/* Flag: Error occured */
89  int		 back		= 0;		/* Result */
90#if	DK4_USE_ASSERT
91  assert(NULL != dptr);
92  assert(0 < sz);
93#endif
94  if ((NULL != dptr) && (0 < sz)) { *dptr = dkT('\0'); }
95  if (1 == padsz) {
96    padsz = (8 * sizeof(dk4_um_t)) / 3;
97    if (0 != ((8 * sizeof(dk4_um_t)) % 3)) {
98      padsz++;
99    }
100  }
101  if ((NULL != dptr) && (0 < sz) && (padsz < sz)) {
102    do {
103      switch ((int)(val % (dk4_um_t)8UL)) {
104        case 0: {
105	  if (used < sizeof(buf)) { buf[used++] = dkT('0'); } else { err = 1; }
106	} break;
107	case 1: {
108	  if (used < sizeof(buf)) { buf[used++] = dkT('1'); } else { err = 1; }
109	} break;
110	case 2: {
111	  if (used < sizeof(buf)) { buf[used++] = dkT('2'); } else { err = 1; }
112	} break;
113	case 3: {
114	  if (used < sizeof(buf)) { buf[used++] = dkT('3'); } else { err = 1; }
115	} break;
116	case 4: {
117	  if (used < sizeof(buf)) { buf[used++] = dkT('4'); } else { err = 1; }
118	} break;
119	case 5: {
120	  if (used < sizeof(buf)) { buf[used++] = dkT('5'); } else { err = 1; }
121	} break;
122	case 6: {
123	  if (used < sizeof(buf)) { buf[used++] = dkT('6'); } else { err = 1; }
124	} break;
125	case 7: {
126	  if (used < sizeof(buf)) { buf[used++] = dkT('7'); } else { err = 1; }
127	} break;
128      }
129      val = val / (dk4_um_t)8UL;
130      if ((dk4_um_t) 0UL == val) { cc = 0; }
131    } while ((1 == cc) && (0 == err));
132    if (0 == err) {
133      if (used < sz) {
134        if ((0 < padsz) && (used < padsz)) {
135	  for (i = 0; i < (padsz - used); i++) {
136	    dptr[i] = dkT('0');
137	  }
138	  for (i = 0; i < used; i++) {
139	    dptr[padsz - 1 -i] = buf[i];
140	  }
141	  dptr[padsz] = dkT('\0');
142	  back = 1;
143	} else {
144	  for (i = 0; i < used; i++) {
145	    dptr[i] = buf[used - 1 - i];
146	  }
147	  dptr[used] = dkT('\0');
148	  back = 1;
149	}
150      } else {
151        dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
152      }
153    } else {					$? "! error, bug"
154      dk4error_set_simple_error_code(erp, DK4_E_BUG);
155    }
156  } else {
157    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
158  }
159  return back;
160}
161
162
163