summaryrefslogtreecommitdiff
path: root/support/dktools/dk4numl.ctr
diff options
context:
space:
mode:
authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /support/dktools/dk4numl.ctr
Initial commit
Diffstat (limited to 'support/dktools/dk4numl.ctr')
-rw-r--r--support/dktools/dk4numl.ctr135
1 files changed, 135 insertions, 0 deletions
diff --git a/support/dktools/dk4numl.ctr b/support/dktools/dk4numl.ctr
new file mode 100644
index 0000000000..5e97883bca
--- /dev/null
+++ b/support/dktools/dk4numl.ctr
@@ -0,0 +1,135 @@
+%% options
+
+copyright owner = Dirk Krause
+copyright year = 2015-xxxx
+license = bsd
+
+
+
+%% header
+
+/** @file
+ Text representation length for numbers.
+ When showing information in a table one needs to know the length
+ of each field.
+ This module provides the dk4numlength() funtion to find the string
+ length needed for an integer value of a given size (number of bytes).
+
+ CRT on Windows: Not used.
+*/
+
+#ifndef DK4CONF_H_INCLUDED
+#include "dk4conf.h"
+#endif
+
+#ifndef DK4TYPES_H_INCLUDED
+#include "dk4types.h"
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Find number of digits for data type.
+ @param isz Integer data type size in bytes.
+ @param sgn Flag: Signed data type (0=unsigned, other=signed).
+ @return Maximum string length used when data is shown as text.
+*/
+size_t
+dk4numlength(size_t isz, int sgn);
+
+#ifdef __cplusplus
+}
+#endif
+
+%% module
+
+#include "dk4conf.h"
+#include "dk4error.h"
+#include "dk4numl.h"
+#include "dk4maadu.h"
+
+size_t
+dk4numlength(size_t isz, int sgn)
+{
+ dk4_er_t er;
+ dk4_um_t co;
+ size_t back = 0;
+ if (1 < isz) {
+ if (2 < isz) {
+ if (4 < isz) {
+ if (8 < isz) {
+ if (16 < isz) {
+#if VERSION_BEFORE_20141122
+ if (0 != (isz % 2)) { isz++; }
+ back = 5 * (isz / 2);
+ if (0 != sgn) { back++; }
+#else
+ dk4error_init(&er);
+ if (0 != sgn) {
+ co = dk4ma_um_mul(
+ (dk4_um_t)30104UL,
+ dk4ma_um_sub(
+ dk4ma_um_mul((dk4_um_t)8UL, (dk4_um_t)isz, &er),
+ (dk4_um_t)1UL,
+ &er
+ ),
+ &er
+ );
+ if ((dk4_um_t)0UL != (co % (dk4_um_t)100000UL)) {
+ co = co / (dk4_um_t)100000UL;
+ co++;
+ } else {
+ co = co / (dk4_um_t)100000UL;
+ }
+ co++;
+ if ((dk4_um_t)(SIZE_MAX) >= co) {
+ back = (size_t)co;
+ } else {
+ back = (size_t)co;
+ er.ec = DK4_E_MATH_OVERFLOW;
+ }
+ } else {
+ co = dk4ma_um_mul(
+ (dk4_um_t)30104UL,
+ dk4ma_um_mul((dk4_um_t)8UL, (dk4_um_t)isz, &er),
+ &er
+ );
+ if ((dk4_um_t)0UL != (co % (dk4_um_t)100000UL)) {
+ co = co / (dk4_um_t)100000UL;
+ co++;
+ } else {
+ co = co / (dk4_um_t)100000UL;
+ }
+ if ((dk4_um_t)(SIZE_MAX) >= co) {
+ back = (size_t)co;
+ } else {
+ back = (size_t)co;
+ er.ec = DK4_E_MATH_OVERFLOW;
+ }
+ }
+ if (DK4_E_NONE != er.ec) {
+ if (0 != (isz % 2)) { isz++; }
+ back = 5 * (isz / 2);
+ if (0 != sgn) { back++; }
+ }
+#endif
+ } else {
+ back = ((0 != sgn) ? 41 : 40);
+ }
+ } else {
+ back = ((0 != sgn) ? 21 : 20);
+ }
+ } else {
+ back = ((0 != sgn) ? 11 : 10);
+ }
+ } else {
+ back = ((0 != sgn) ? 6 : 5);
+ }
+ } else {
+ back = ((0 != sgn) ? 4 : 3);
+ }
+ return back;
+}
+