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       fopen.c - scc - simple c99 compiler
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       ---
       fopen.c (380B)
       ---
            1 #include <errno.h>
            2 #include <stdio.h>
            3 
            4 #include "../libc.h"
            5 
            6 #undef fopen
            7 
            8 FILE *
            9 fopen(const char * restrict name, const char * restrict mode)
           10 {
           11         FILE *fp;
           12 
           13         for (fp = __iob; fp < &__iob[FOPEN_MAX]; ++fp) {
           14                 if ((fp->flags & (_IOREAD | _IOWRITE | _IORW)) == 0)
           15                         break;
           16         }
           17         if (fp == &__iob[FOPEN_MAX]) {
           18                 errno = ENOMEM;
           19                 return NULL;
           20         }
           21 
           22         return _fpopen(name, mode, fp);
           23 }