28 lines
494 B
C
28 lines
494 B
C
#include "config.h"
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#include "f2c.h"
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#include "fio.h"
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#ifdef KR_headers
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integer f_rew(a) alist *a;
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#else
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integer f_rew(alist *a)
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#endif
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{
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unit *b;
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if (f__init & 2)
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f__fatal (131, "I/O recursion");
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if(a->aunit>=MXUNIT || a->aunit<0)
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err(a->aerr,101,"rewind");
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b = &f__units[a->aunit];
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if(b->ufd == NULL || b->uwrt == 3)
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return(0);
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if(!b->useek)
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err(a->aerr,106,"rewind");
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if(b->uwrt) {
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(void) t_runc(a);
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b->uwrt = 3;
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}
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FSEEK(b->ufd, 0, SEEK_SET);
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b->uend=0;
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return(0);
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}
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