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https://codeberg.org/scip/pcp.git
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85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
#ifndef _HAVE_PCP_PLATFORM_H
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#define _HAVE_PCP_PLATFORM_H
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#if defined(CONFIG_H_FILE)
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#include CONFIG_H_FILE
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#elif defined(HAVE_CONFIG_H)
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#include "config.h"
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#else
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#error Need either CONFIG_H_FILE or HAVE_CONFIG_H defined.
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#endif
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#ifdef HAVE_ENDIAN_H
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# include <endian.h>
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#else // no endian.h
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# ifdef HAVE_SYS_ENDIAN_H
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# include <sys/endian.h>
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# ifdef HAVE_BETOH32
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// openbsd, use aliases
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# define be32toh betoh32
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# define htobe32 hto32be
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# endif
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# else // no sys/endian.h
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# if __BYTE_ORDER == __BIG_ENDIAN
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# define be32toh(x) ((void)0)
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# define htobe32(x) ((void)0)
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# else
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# ifdef HAVE_ARPA_INET_H
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# include <arpa/inet.h>
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# else
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# ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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# else
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# error Need either netinet/in.h or arpa/inet.h for ntohl() and htonl()
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# endif
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# endif
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# define be32toh(x) ((u_int32_t)ntohl((u_int32_t)(x)))
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# define htobe32(x) ((u_int32_t)htonl((u_int32_t)(x)))
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# endif
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# endif // HAVE_SYS_ENDIAN_H
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#endif // HAVE_ENDIAN_H
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#ifndef HAVE_ARC4RANDOM_BUF
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// shitty OS. we've got to use other stuff
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdint.h>
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static inline FILE *__getranddev() {
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FILE *R;
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if((R = fopen("/dev/urandom", "rb")) == NULL) {
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// not even this is here! what a shame
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if((R = fopen("/dev/random", "rb")) == NULL) {
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// not available or depleted. that's too bad
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fprintf(stderr, "ERROR: /dev/urandom not available, /dev/random is depleted.\n");
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fprintf(stderr, "That's horrible for you but a nightmare for me. I die. Bye.\n");
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exit(2);
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}
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}
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return R;
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}
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static inline u_int32_t arc4random() {
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uint32_t x;
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FILE *R = __getranddev();
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fread(&x, sizeof(uint32_t), 1, R);
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fclose(R);
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return x;
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}
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static inline void arc4random_buf(void *buf, size_t nbytes) {
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FILE *R = __getranddev();
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fread(buf, nbytes, 1, R);
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fclose(R);
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}
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#endif
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#endif /* !_HAVE_PCP_PLATFORM_H */
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