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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;
}
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