mirror of
https://github.com/fluencelabs/musl
synced 2025-05-29 15:41:36 +00:00
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
#if 0
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#include "stdio_impl.h"
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static ssize_t mread(FILE *f, unsigned char *buf, size_t len)
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{
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size_t rem = f->memsize - f->mempos;
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if (len > rem) len = rem;
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memcpy(buf, f->membuf+f->mempos, len);
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f->mempos += len;
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return len;
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}
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static ssize_t mwrite(FILE *f, const unsigned char *buf, size_t len)
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{
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size_t rem;
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if (f->memmode == 'a') f->mempos = f->memsize;
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rem = f->memlim - f->mempos;
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if (len > rem) len = rem;
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memcpy(f->membuf+f->mempos, buf, len);
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f->mempos += len;
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if (f->mempos >= f->memsize) {
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f->memsize = f->mempos;
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}
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return len;
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}
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FILE *fmemopen(void *buf, size_t size, const char *mode)
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{
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FILE *f;
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int plus = !!strchr(mode, '+');
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if (!size || !strchr("rwa", *mode)) {
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errno = EINVAL;
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return 0;
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}
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if (!buf && size > SIZE_MAX-sizeof(FILE)-BUFSIZ-UNGET) {
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errno = ENOMEM;
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return 0;
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}
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f = calloc(sizeof(FILE) + UNGET + BUFSIZ + (buf?0:size), 1);
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if (!f) return 0;
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f->fd = -1;
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f->lbf = EOF;
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f->buf = (unsigned char *)(f+1) + UNGET;
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f->buf_size = BUFSIZ;
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if (!buf) buf = f->buf + BUFSIZ;
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if (!plus) f->flags = (*mode == 'r') ? F_NOWR : F_NORD;
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if (*mode == 'a') f->mempos = strchr(buf, 0)-buf;
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f->read = mread;
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f->write = mwrite;
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f->seek = mseek;
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f->flush = mflush;
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f->close = mclose;
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return f;
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}
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#endif
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