/*
- * This file is part of the sigrok project.
+ * This file is part of the libsigrok project.
*
* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
*
#include "libsigrok.h"
#include "libsigrok-internal.h"
-/* Message logging helpers with driver-specific prefix string. */
-#define DRIVER_LOG_DOMAIN "strutil: "
-#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
-#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
+/* Message logging helpers with subsystem-specific prefix string. */
+#define LOG_PREFIX "strutil: "
+#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
+#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
+#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
+#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
+#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
+#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
/**
* @file
*/
/**
- * Convert a numeric value value to its "natural" string representation.
- * in SI units
+ * Convert a numeric value value to its "natural" string representation
+ * in SI units.
*
* E.g. a value of 3000000, with units set to "W", would be converted
* to "3 MW", 20000 to "20 kW", 31500 would become "31.5 kW".
*/
SR_API char *sr_si_string_u64(uint64_t x, const char *unit)
{
+ uint8_t i;
+ uint64_t quot, divisor[] = {
+ SR_HZ(1), SR_KHZ(1), SR_MHZ(1), SR_GHZ(1),
+ SR_GHZ(1000), SR_GHZ(1000 * 1000), SR_GHZ(1000 * 1000 * 1000),
+ };
+ const char *p, prefix[] = "\0kMGTPE";
+ char fmt[8], fract[20] = "", *f;
+
if (unit == NULL)
unit = "";
- if ((x >= SR_GHZ(1)) && (x % SR_GHZ(1) == 0)) {
- return g_strdup_printf("%" PRIu64 " G%s", x / SR_GHZ(1), unit);
- } else if ((x >= SR_GHZ(1)) && (x % SR_GHZ(1) != 0)) {
- return g_strdup_printf("%" PRIu64 ".%" PRIu64 " G%s",
- x / SR_GHZ(1), x % SR_GHZ(1), unit);
- } else if ((x >= SR_MHZ(1)) && (x % SR_MHZ(1) == 0)) {
- return g_strdup_printf("%" PRIu64 " M%s",
- x / SR_MHZ(1), unit);
- } else if ((x >= SR_MHZ(1)) && (x % SR_MHZ(1) != 0)) {
- return g_strdup_printf("%" PRIu64 ".%" PRIu64 " M%s",
- x / SR_MHZ(1), x % SR_MHZ(1), unit);
- } else if ((x >= SR_KHZ(1)) && (x % SR_KHZ(1) == 0)) {
- return g_strdup_printf("%" PRIu64 " k%s",
- x / SR_KHZ(1), unit);
- } else if ((x >= SR_KHZ(1)) && (x % SR_KHZ(1) != 0)) {
- return g_strdup_printf("%" PRIu64 ".%" PRIu64 " k%s",
- x / SR_KHZ(1), x % SR_KHZ(1), unit);
- } else {
- return g_strdup_printf("%" PRIu64 " %s", x, unit);
+ for (i = 0; (quot = x / divisor[i]) >= 1000; i++);
+
+ if (i) {
+ sprintf(fmt, ".%%0%dlu", i * 3);
+ f = fract + sprintf(fract, fmt, x % divisor[i]) - 1;
+
+ while (f >= fract && strchr("0.", *f))
+ *f-- = 0;
}
- sr_err("%s: Error creating SI units string.", __func__);
- return NULL;
+ p = prefix + i;
+
+ return g_strdup_printf("%" PRIu64 "%s %.1s%s", quot, fract, p, unit);
}
/**