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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/dk3masts.ctr
Initial commit
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diff --git a/support/dktools/dk3masts.ctr b/support/dktools/dk3masts.ctr
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+%% options
+
+copyright owner = Dirk Krause
+copyright year = 2014-xxxx
+license = bsd
+
+
+
+%% header
+
+/** @file dk3masts.h Retrieve size_t from dkChar text.
+*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Convert string to size_t. The string can optionally contain an
+ ``k'', ``K'', ``m'', ``M'', ``g'', or ``G'' suffix.
+ @param rp Pointer to result variable.
+ @param src Source text to convert.
+ @param ec Pointer to error code variable, may be NULL.
+ Set to DK3_ERROR_INVALID_ARGS if rp and/or src is NULL or
+ the string is too long for the internal buffer,
+ DK3_ERROR_SYNTAX if unacceptable characters found,
+ DK3_ERROR_MATH_OVERFLOW on numeric overflow.
+ @return 1 on success, 0 on error (see ec).
+*/
+int
+dk3ma_sz_from_string(size_t *rp, dkChar const *src, int *ec);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+
+%% module
+
+#include "dk3ma.h"
+#include <stdio.h>
+#include "dk3mem.h"
+#include "dk3str.h"
+
+
+
+$!trace-include
+
+
+
+int
+dk3ma_sz_from_string(size_t *rp, dkChar const *src, int *ec)
+{
+ /* Private copy of string, can be modified. */
+ dkChar buffer[DK3_MEM_ALIGN((8*sizeof(dk3_um_t)+1),16)];
+ dkChar const *ptr; /* Start of original text */
+ size_t lgt; /* Length of text in buffer */
+ dk3_um_t convres = (dk3_um_t)1; /* Conversion result */
+ dk3_um_t factor = (dk3_um_t)1; /* Constant factor */
+ int myec = 0; /* Private error code */
+ int back = 0; /* Function result */
+ int done = 0; /* Flag: No conversion necessary */
+ $? "+ dk3ma_sz_from_string %!ds", TR_STR(src)
+ if ((NULL != rp) && (NULL != src)) {
+ ptr = dk3str_start(src, NULL);
+ if (NULL != ptr) {
+ if (dk3str_len(ptr) < DK3_SIZEOF(buffer,dkChar)) {
+ dk3str_cpy(buffer, ptr);
+ dk3str_chomp(buffer, NULL);
+ lgt = dk3str_len(buffer);
+ if (0 < lgt) {
+ switch(buffer[lgt-1]) {
+ case dkT('k'): case dkT('K'): {
+ factor = (dk3_um_t)1024;
+ buffer[lgt-1] = dkT('\0');
+ if (1 == lgt) { done = 1; }
+ } break;
+ case dkT('m'): case dkT('M'): {
+ factor = dk3ma_um_mul_ok((dk3_um_t)1024, (dk3_um_t)1024, &myec);
+ buffer[lgt-1] = dkT('\0');
+ if (1 == lgt) { done = 1; }
+ } break;
+ case dkT('g'): case dkT('G'): {
+ factor = dk3ma_um_mul_ok(
+ dk3ma_um_mul_ok((dk3_um_t)1024, (dk3_um_t)1024, &myec),
+ (dk3_um_t)1024, &myec
+ );
+ buffer[lgt-1] = dkT('\0');
+ if (1 == lgt) { done = 1; }
+ } break;
+ }
+ if (0 == myec) {
+ if (0 == done) { $? ". must scan"
+ if (0 != dk3ma_um_from_string(&convres, buffer, ec)) {
+ $? ". scan ok"
+ convres = dk3ma_um_mul_ok(convres, factor, &myec);
+ if ((dk3_um_t)DK3_SIZE_T_MAX >= convres) {
+ *rp = (size_t)convres;
+ back = 1;
+#if DK3_ON_WINDOWS
+ $? ". size = %I64u", convres
+#else
+ $? ". size = %ju", (uintmax_t)convres
+#endif
+ } else { $? "! overflow"
+ if (NULL != ec) { *ec = DK3_ERROR_MATH_OVERFLOW; }
+ }
+ } else { $? "! failed to scan"
+ }
+ } else { $? ". simply unit, no number"
+ convres = dk3ma_um_mul_ok(convres, factor, &myec);
+ if ((dk3_um_t)DK3_SIZE_T_MAX >= convres) {
+ *rp = (size_t)convres;
+ back = 1; $? ". success"
+#if DK3_ON_WINDOWS
+ $? ". size = %I64u", convres
+#else
+ $? ". size = %ju", (uintmax_t)convres
+#endif
+ } else { $? "! overflow"
+ if (NULL != ec) { *ec = DK3_ERROR_MATH_OVERFLOW; }
+ }
+ }
+ if (1 == back) {
+ if (0 != myec) { $? "! internal error"
+ back = 0;
+ if (NULL != ec) { *ec = myec; }
+ }
+ }
+ } else { $? "! myec set"
+ if (NULL != ec) { *ec = myec; }
+ }
+ } else { $? "! empty string"
+ if (NULL != ec) { *ec = DK3_ERROR_INVALID_ARGS; }
+ }
+ } else { $? "! string too long"
+ if (NULL != ec) { *ec = DK3_ERROR_INVALID_ARGS; }
+ }
+ } else { $? "! empty string"
+ if (NULL != ec) { *ec = DK3_ERROR_INVALID_ARGS; }
+ }
+ } else { $? "! invalid arguments"
+ if (NULL != ec) { *ec = DK3_ERROR_INVALID_ARGS; }
+ } $? "- dk3ma_sz_from_string %d", back
+ return back;
+}
+