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@@ -253,14 +253,18 @@ void buffer_appendb(buffer_t *dst, buffer_t *src) {
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void buffer_fmt(buffer_t *buf, const char *fmt, ...) {
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va_list args;
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- va_start(args, fmt);
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+ va_list largs;
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+
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+ va_start(largs, fmt);
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+ va_copy(args, largs);
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- size_t size = vsnprintf(NULL, 0, fmt, args);
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- char *str = malloc(sizeof(char) * (size + 1));
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+ size_t size = vsnprintf(NULL, 0, fmt, largs) + 1;
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+ char *str = malloc(sizeof(char) * size);
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- vsnprintf(str, size + 1, fmt, args);
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+ vsnprintf(str, size, fmt, args);
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va_end(args);
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+ va_end(largs);
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buffer_appends(buf, str);
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}
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