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Annotation of researchv10no/cmd/lcc/ph/sdutil.h, revision 1.1

1.1     ! root        1: /* As per your license agreement, your distribution is not to be moved or copied outside the Designated Site
        !             2:  * without specific permission from Plum Hall Inc.
        !             3:  */
        !             4: 
        !             5: /*
        !             6:  * SDUTIL - system-dependent utility routines for freestanding implementations
        !             7:  *
        !             8:  * These functions are used by UTIL.C.  They provide facilities that cannot
        !             9:  * be implemented portably and must be rewritten for each freestanding imple-
        !            10:  * mentation.  This sample implementation uses standard library functions
        !            11:  * (provided by a hosted implementation).
        !            12:  */
        !            13: 
        !            14: #ifndef FREESTANDING
        !            15: #include <errno.h>
        !            16: #include <stdio.h>
        !            17: #endif /* FREESTANDING */
        !            18: 
        !            19: #include "defs.h"
        !            20: 
        !            21: extern char last_char_printed;
        !            22: 
        !            23: /*
        !            24:  * PR_OK - printf a text line in ok situation (no error, just text)
        !            25:  */
        !            26: void pr_ok FN_DEF1(s,
        !            27:        const char *s)
        !            28:        {
        !            29:        char c;
        !            30:        fputs(s, stdout);
        !            31:        while (*s != '\0')
        !            32:                c = *s++;
        !            33:        last_char_printed = c;
        !            34:        fflush(stdout);
        !            35:        }
        !            36: 
        !            37: /*
        !            38:  * SETZERO - appear, to a compiler, as though Zero is unpredictably set
        !            39:  */
        !            40: void setzero()
        !            41:        {
        !            42:        FILE *fp;
        !            43:        int save;
        !            44: 
        !            45:        save = errno;
        !            46:        if ((fp = fopen("nonexistent", "r")) != 0)
        !            47:                {
        !            48:                fscanf(fp, "ignore format", &Zero);
        !            49:                fclose(fp);
        !            50:                }
        !            51:        errno = save;
        !            52:        }

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