Squash commits for public release

2025-02-12 09:54:05 -05:00
commit 7118adc514
1108 changed files with 80873 additions and 0 deletions
--- a/libs/libc/time/strftime.c
+++ b/libs/libc/time/strftime.c
@@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sysdep.h>
+#include <time.h>
+
+static const char __wday_snames[7][4] = {
+    "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
+};
+static const char __wday_lnames[7][11] = {
+    "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
+};
+static const char __mon_snames[12][4] = {
+    "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+};
+static const char __mon_lnames[12][11] = {
+    "January", "February", "March", "April", "May", "June", "July", "Auguest", "September", "October", "November", "December"
+};
+
+static inline size_t strftime_append(char* s, size_t remaining, const char* appendee)
+{
+    size_t copy_size = min(remaining, strlen(appendee));
+    memcpy(s, appendee, copy_size);
+    return copy_size;
+}
+
+size_t strftime(char* s, size_t remaining, const char* format, const tm_t* tm)
+{
+    char buf[32];
+    const char* p = format;
+    size_t written = 0;
+    remaining--;
+    while (*p) {
+        if (*p == '%' && *(p + 1)) {
+            p++;
+            size_t wr = 0;
+            switch (*p) {
+            case 'a':
+                wr = strftime_append((char*)(s + written), remaining, __wday_snames[tm->tm_wday]);
+                written += wr;
+                remaining -= wr;
+                break;
+            case 'A':
+                wr = strftime_append((char*)(s + written), remaining, __wday_lnames[tm->tm_wday]);
+                written += wr;
+                remaining -= wr;
+                break;
+            case 'R':
+                if (tm->tm_min < 10) {
+                    snprintf(buf, 32, "%d:0%d", tm->tm_hour, tm->tm_min);
+                } else {
+                    snprintf(buf, 32, "%d:%d", tm->tm_hour, tm->tm_min);
+                }
+                wr = strftime_append((char*)(s + written), remaining, buf);
+                written += wr;
+                remaining -= wr;
+                break;
+            }
+            p++;
+        } else {
+            if (remaining) {
+                s[written] = *p;
+                written++;
+                remaining--;
+            }
+            p++;
+        }
+    }
+
+    s[written] = '\0';
+    return written;
+}