Merge pull request #369 from 31KM/master

Introduce memory options 'unit' and 'decimals'

i3status.c

@@ -431,6 +431,8 @@ int main(int argc, char *argv[]) {
         CFG_STR("threshold_degraded", NULL, CFGF_NONE),
         CFG_STR("threshold_critical", NULL, CFGF_NONE),
         CFG_STR("memory_used_method", "classical", CFGF_NONE),
+        CFG_STR("unit", "auto", CFGF_NONE),
+        CFG_INT("decimals", 1, CFGF_NONE),
         CFG_CUSTOM_ALIGN_OPT,
         CFG_CUSTOM_COLOR_OPTS,
         CFG_CUSTOM_MIN_WIDTH_OPT,
@@ -763,7 +765,7 @@ int main(int argc, char *argv[]) {
 
             CASE_SEC("memory") {
                 SEC_OPEN_MAP("memory");
-                print_memory(json_gen, buffer, cfg_getstr(sec, "format"), cfg_getstr(sec, "format_degraded"), cfg_getstr(sec, "threshold_degraded"), cfg_getstr(sec, "threshold_critical"), cfg_getstr(sec, "memory_used_method"));
+                print_memory(json_gen, buffer, cfg_getstr(sec, "format"), cfg_getstr(sec, "format_degraded"), cfg_getstr(sec, "threshold_degraded"), cfg_getstr(sec, "threshold_critical"), cfg_getstr(sec, "memory_used_method"), cfg_getstr(sec, "unit"), cfg_getint(sec, "decimals"));
                 SEC_CLOSE_MAP;
             }
 

include/i3status.h

@@ -225,7 +225,7 @@ void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const
 void print_cpu_usage(yajl_gen json_gen, char *buffer, const char *format, const char *format_above_threshold, const char *format_above_degraded_threshold, const char *path, const float max_threshold, const float degraded_threshold);
 void print_eth_info(yajl_gen json_gen, char *buffer, const char *interface, const char *format_up, const char *format_down);
 void print_load(yajl_gen json_gen, char *buffer, const char *format, const char *format_above_threshold, const float max_threshold);
-void print_memory(yajl_gen json_gen, char *buffer, const char *format, const char *format_degraded, const char *threshold_degraded, const char *threshold_critical, const char *memory_used_method);
+void print_memory(yajl_gen json_gen, char *buffer, const char *format, const char *format_degraded, const char *threshold_degraded, const char *threshold_critical, const char *memory_used_method, const char *unit, const int decimals);
 void print_volume(yajl_gen json_gen, char *buffer, const char *fmt, const char *fmt_muted, const char *device, const char *mixer, int mixer_idx);
 bool process_runs(const char *path);
 int volume_pulseaudio(uint32_t sink_idx, const char *sink_name);

man/i3status.man

@@ -463,6 +463,15 @@ If the +format_degraded+ parameter is given and either the critical or the
 degraded threshold applies, +format_degraded+ will get used as format string.
 It acts equivalently to +format+.
 
+It's also possible to define the unit for the various format placeholders. As
++/proc/meminfo+ returns the memory in kB they will be converted to the given
+unit. If no unit is given or the +auto+ option is used, the conversion will
+select the maximum possible unit.
+
+As the converted format placeholder will be a decimal number, the number of
+decimals can be configured via the +decimals+ option. If no such option is
+given the converted format placeholder will have one decimal.
+
 As Linux' meminfo doesn't expose the overall memory in use, there are multiple
 methods to distinguish the actually used memory. 
 
@@ -476,6 +485,10 @@ methods to distinguish the actually used memory.
 
 *Example format*: +%percentage_used used, %percentage_free free, %percentage_shared shared+
 
+*Example unit*: auto, Ki, Mi, Gi, Ti
+
+*Example decimals*: 0, 1, 2, 3
+
 *Example threshold_degraded*: +10%+
 
 *Example threshold_critical*: +5%+

src/print_mem.c

@@ -22,15 +22,19 @@ static const char memoryfile_linux[] = "/proc/meminfo";
  * Prints the given amount of bytes in a human readable manner.
  *
  */
-static int print_bytes_human(char *outwalk, uint64_t bytes) {
+static int print_bytes_human(char *outwalk, uint64_t bytes, const char *unit, const int decimals) {
     double size = bytes;
     int exponent = 0;
     int bin_base = BINARY_BASE;
     while (size >= bin_base && exponent < MAX_EXPONENT) {
+        if (strcasecmp(unit, iec_symbols[exponent]) == 0) {
+            break;
+        }
+
         size /= bin_base;
         exponent += 1;
     }
-    return sprintf(outwalk, "%.1f %sB", size, iec_symbols[exponent]);
+    return sprintf(outwalk, "%.*f %sB", decimals, size, iec_symbols[exponent]);
 }
 #endif
 
@@ -80,7 +84,7 @@ static long memory_absolute(const long mem_total, const char *size) {
 }
 #endif
 
-void print_memory(yajl_gen json_gen, char *buffer, const char *format, const char *format_degraded, const char *threshold_degraded, const char *threshold_critical, const char *memory_used_method) {
+void print_memory(yajl_gen json_gen, char *buffer, const char *format, const char *format_degraded, const char *threshold_degraded, const char *threshold_critical, const char *memory_used_method, const char *unit, const int decimals) {
     char *outwalk = buffer;
 
 #if defined(linux)
@@ -169,23 +173,23 @@ void print_memory(yajl_gen json_gen, char *buffer, const char *format, const cha
             *(outwalk++) = *walk;
 
         } else if (BEGINS_WITH(walk + 1, "total")) {
-            outwalk += print_bytes_human(outwalk, ram_total);
+            outwalk += print_bytes_human(outwalk, ram_total, unit, decimals);
             walk += strlen("total");
 
         } else if (BEGINS_WITH(walk + 1, "used")) {
-            outwalk += print_bytes_human(outwalk, ram_used);
+            outwalk += print_bytes_human(outwalk, ram_used, unit, decimals);
             walk += strlen("used");
 
         } else if (BEGINS_WITH(walk + 1, "free")) {
-            outwalk += print_bytes_human(outwalk, ram_free);
+            outwalk += print_bytes_human(outwalk, ram_free, unit, decimals);
             walk += strlen("free");
 
         } else if (BEGINS_WITH(walk + 1, "available")) {
-            outwalk += print_bytes_human(outwalk, ram_available);
+            outwalk += print_bytes_human(outwalk, ram_available, unit, decimals);
             walk += strlen("available");
 
         } else if (BEGINS_WITH(walk + 1, "shared")) {
-            outwalk += print_bytes_human(outwalk, ram_shared);
+            outwalk += print_bytes_human(outwalk, ram_shared, unit, decimals);
             walk += strlen("shared");
 
         } else if (BEGINS_WITH(walk + 1, "percentage_free")) {