add "scan helper getc" and rework strtod, etc. to use it

[musl] / src / internal / shgetc.h

diff --git a/src/internal/shgetc.h b/src/internal/shgetc.h
new file mode 100644 (file)
index 0000000..3434cda
--- /dev/null
+++ b/src/internal/shgetc.h
@@ -0,0 +1,25 @@
+#include "stdio_impl.h"
+
+void __shlim(FILE *, off_t);
+int __shgetc(FILE *);
+
+static inline off_t shcnt(FILE *f)
+{
+       return f->shcnt + (f->rpos - f->rend);
+}
+
+static inline void shlim(FILE *f, off_t lim)
+{
+       __shlim(f, lim);
+}
+
+static inline int shgetc(FILE *f)
+{
+       if (f->rpos < f->shend) return *f->rpos++;
+       return __shgetc(f);
+}
+
+static inline void shunget(FILE *f)
+{
+       if (f->rend) f->rpos--;
+}