mmmmh

format.c

@@ -0,0 +1,61 @@
+#include "format.h"
+
+#define STB_SPRINTF_DECORATE(name) stb_##name
+#define STB_SPRINTF_NOUNALIGNED
+#define STB_SPRINTF_IMPLEMENTATION
+#include "stb/stb_sprintf.h"
+
+#include "arena.h"
+
+static char *fmt__stb_callback(const char *buf, void *ud, int len) {
+    (void)len;
+    printf("%.*s", len, buf);
+    return (char *)ud;
+}
+
+int fmtPrint(const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    int out = fmtPrintv(fmt, args);
+    va_end(args);
+    return out;
+}
+
+int fmtPrintv(const char *fmt, va_list args) {
+    char buffer[STB_SPRINTF_MIN] = {0};
+    return stb_vsprintfcb(fmt__stb_callback, buffer, buffer, fmt, args);
+}
+
+int fmtBuffer(char *buffer, usize buflen, const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    int out = fmtBufferv(buffer, buflen, fmt, args);
+    va_end(args);
+    return out;
+}
+
+int fmtBufferv(char *buffer, usize buflen, const char *fmt, va_list args) {
+    return stb_vsnprintf(buffer, (int)buflen, fmt, args);
+}
+
+#if 0
+str_t fmtStr(Arena *arena, const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    str_t out = fmtStrv(arena, fmt, args);
+    va_end(args);
+    return out;
+}
+
+str_t fmtStrv(Arena *arena, const char *fmt, va_list args) {
+    va_list vcopy;
+    va_copy(vcopy, args);
+    int len = stb_vsnprintf(NULL, 0, fmt, vcopy);
+    va_end(vcopy);
+
+    char *buffer = alloc(arena, char, len + 1);
+    stb_vsnprintf(buffer, len + 1, fmt, args);
+
+    return (str_t){ .buf = buffer, .len = (usize)len };
+}
+#endif