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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/dk4mai8hdu.ctr
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+%% options
+
+copyright owner = Dirk Krause
+copyright year = 2015-xxxx
+license = bsd
+
+
+
+%% header
+
+/** @file
+ Retrieve dk4_um_t value from
+ 8 bit character string in hexadecimal notation.
+
+ CRT on Windows: Optional, disabling CRT degrades performance.
+*/
+
+#ifndef DK4CONF_H_INCLUDED
+#include "dk4conf.h"
+#endif
+
+#ifndef DK4TYPES_H_INCLUDED
+#include "dk4types.h"
+#endif
+
+#ifndef DK4ERROR_H_INCLUDED
+#include "dk4error.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Retrieve numeric value from string, hexadecimal notation.
+ @param rp Pointer to result variable for the found value.
+ @param src String to check for numeric value.
+ @param endptr Address of pointer variable.
+ A pointer to the first character not processed
+ is stored here.
+ The function may also store a NULL pointer in this
+ variable.
+ The variable points to the correct error position
+ only if er.ec is DK4_E_SYNTAX.
+ @param atg Allow trailing garbage:
+ 0=no unprocessable trailing bytes allowed,
+ 1=trailing whitespaces allowed,
+ 2=any trailing characters allowed.
+ @param erp Error report, may be NULL.
+ @return 1 on success, 0 on error.
+
+ Error codes:
+ DK4_E_INVALID_ARGUMENTS if rp or src is NULL,
+ DK4_E_MATH_OVERFLOW if the number is out of range, or
+ DK4_E_SYNTAX if src contains illegal characters.
+*/
+int
+dk4ma_input_c8_hex_dk4_um_t(
+ dk4_um_t *rp,
+ const char *src,
+ const char **endptr,
+ int atg,
+ dk4_er_t *erp
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+
+%% module
+
+#include "dk4mai8hdu.h"
+#include "dk4numco.h"
+#include "dk4str8.h"
+
+
+
+$!trace-include
+
+
+
+int
+dk4ma_input_c8_hex_dk4_um_t(
+ dk4_um_t *rp,
+ const char *src,
+ const char **endptr,
+ int atg,
+ dk4_er_t *erp
+)
+{
+#if VERSION_BEFORE_20141007
+ dk4_er_t er;
+#endif
+ dk4_um_t result= (dk4_um_t)0UL;
+ dk4_um_t op;
+ const char *ep = NULL;
+ int found = 0;
+ int back = 0;
+ int cc = 1;
+ $? "+ dk4ma_input_c8_hex_dk4_um_t \"%!8s\"", src
+ if ((NULL != rp) && (NULL != src)) {
+ if ('0' == src[0]) {
+ if (('x' == src[1]) || ('X' == src[1])) { src++; src++; }
+ }
+#if VERSION_BEFORE_20141007
+ dk4error_init(&er);
+#endif
+ do {
+ $? ". src = \"%!8s\"", src
+ op = (dk4_um_t)0UL;
+ switch (*src) {
+ case '0': { op = (dk4_um_t)0UL; } break;
+ case '1': { op = (dk4_um_t)1UL; } break;
+ case '2': { op = (dk4_um_t)2UL; } break;
+ case '3': { op = (dk4_um_t)3UL; } break;
+ case '4': { op = (dk4_um_t)4UL; } break;
+ case '5': { op = (dk4_um_t)5UL; } break;
+ case '6': { op = (dk4_um_t)6UL; } break;
+ case '7': { op = (dk4_um_t)7UL; } break;
+ case '8': { op = (dk4_um_t)8UL; } break;
+ case '9': { op = (dk4_um_t)9UL; } break;
+ case 'a': case 'A': { op = (dk4_um_t)10UL; } break;
+ case 'b': case 'B': { op = (dk4_um_t)11UL; } break;
+ case 'c': case 'C': { op = (dk4_um_t)12UL; } break;
+ case 'd': case 'D': { op = (dk4_um_t)13UL; } break;
+ case 'e': case 'E': { op = (dk4_um_t)14UL; } break;
+ case 'f': case 'F': { op = (dk4_um_t)15UL; } break;
+ case '\0': { $? ". string finished"
+ cc = 0;
+ if (0 != found) { $? ". digits found"
+ back = 1;
+ *rp = result;
+ } else { $? ". no digits found"
+ ep = src;
+ dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
+ }
+ } break;
+ default: {
+ cc = 0;
+ ep = src;
+ if (0 != found) {
+ switch (atg) {
+ case 2: {
+ back = 1;
+ *rp = result;
+ } break;
+ case 1: {
+ if (NULL == dk4str8_start(src, NULL)) {
+ back = 1;
+ *rp = result;
+ } else {
+ dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
+ }
+ } break;
+ default: {
+ dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
+ } break;
+ }
+ } else {
+ dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
+ }
+ } break;
+ }
+ if (0 != cc) {
+ found = 1;
+#if VERSION_BEFORE_20141007
+ result = dk4ma_um_add(
+ dk4ma_um_mul(result, (dk4_um_t)16UL, &er),
+ op, &er
+ );
+ if (DK4_E_NONE != er.ec) {
+ cc = 0;
+ dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
+ ep = src;
+ }
+#else
+ if ((DK4_UM_MAX / (dk4_um_t)16UL) >= result) {
+ result *= (dk4_um_t)16UL;
+ if ((DK4_UM_MAX - op) >= result) {
+ result += op;
+ } else {
+ cc = 0;
+ ep = src;
+ dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
+ }
+ } else {
+ cc = 0;
+ ep = src;
+ dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
+ }
+#endif
+ }
+ if (0 != cc) {
+ src++;
+ }
+ } while (0 != cc);
+ } else {
+ dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
+ if (NULL != src) { ep = src; }
+ }
+ if (NULL != endptr) { *endptr = ep; }
+ $? "- dk4ma_input_c8_hex_dk4_um_t %d", back
+ return back;
+}
+