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examples: warn on invalid numeric parameters

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add ExUtilGet[U]Int / ExUtilGetFloat which print an error message on
parse failure.
fixes issue #219.

Change-Id: Ie537f5aebd138925bf1a48289b6b5e261b3af2ca
This commit is contained in:
James Zern
2014-09-10 23:35:48 -07:00
parent be70b86c57
commit 96d43a873a
7 changed files with 114 additions and 41 deletions
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29
examples/example_util.c
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@ -23,6 +23,35 @@
#include "webp/decode.h"
#include "./stopwatch.h"
//------------------------------------------------------------------------------
// String parsing
uint32_t ExUtilGetUInt(const char* const v, int base, int* const error) {
char* end = NULL;
const uint32_t n = (v != NULL) ? (uint32_t)strtoul(v, &end, base) : 0u;
if (end == v && error != NULL && !*error) {
*error = 1;
fprintf(stderr, "Error! '%s' is not an integer.\n",
(v != NULL) ? v : "(null)");
}
return n;
}
int ExUtilGetInt(const char* const v, int base, int* const error) {
return (int)ExUtilGetUInt(v, base, error);
}
float ExUtilGetFloat(const char* const v, int* const error) {
char* end = NULL;
const float f = (v != NULL) ? (float)strtod(v, &end) : 0.f;
if (end == v && error != NULL && !*error) {
*error = 1;
fprintf(stderr, "Error! '%s' is not a floating point number.\n",
(v != NULL) ? v : "(null)");
}
return f;
}
// -----------------------------------------------------------------------------
// File I/O