diff options
Diffstat (limited to 'src/backend/port/inet_aton.c')
| -rw-r--r-- | src/backend/port/inet_aton.c | 96 |
1 files changed, 53 insertions, 43 deletions
diff --git a/src/backend/port/inet_aton.c b/src/backend/port/inet_aton.c index 37c11b621b7..122875eda3b 100644 --- a/src/backend/port/inet_aton.c +++ b/src/backend/port/inet_aton.c @@ -1,39 +1,39 @@ /* * - * This inet_aton() function was taken from the GNU C library and - * incorporated into Postgres for those systems which do not have this - * routine in their standard C libraries. + * This inet_aton() function was taken from the GNU C library and + * incorporated into Postgres for those systems which do not have this + * routine in their standard C libraries. * - * The function was been extracted whole from the file inet_aton.c in - * Release 5.3.12 of the Linux C library, which is derived from the - * GNU C library, by Bryan Henderson in October 1996. The copyright - * notice from that file is below. + * The function was been extracted whole from the file inet_aton.c in + * Release 5.3.12 of the Linux C library, which is derived from the + * GNU C library, by Bryan Henderson in October 1996. The copyright + * notice from that file is below. */ /* * Copyright (c) 1983, 1990, 1993 - * The Regents of the University of California. All rights reserved. + * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. + * may be used to endorse or promote products derived from this software + * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) @@ -55,82 +55,92 @@ * cannot distinguish between failure and a local broadcast address. */ int -inet_aton(const char *cp, struct in_addr *addr) +inet_aton(const char *cp, struct in_addr * addr) { register u_long val; - register int base, n; - register char c; - u_int parts[4]; + register int base, + n; + register char c; + u_int parts[4]; register u_int *pp = parts; - for (;;) { + for (;;) + { + /* - * Collect number up to ``.''. - * Values are specified as for C: + * Collect number up to ``.''. Values are specified as for C: * 0x=hex, 0=octal, other=decimal. */ - val = 0; base = 10; - if (*cp == '0') { + val = 0; + base = 10; + if (*cp == '0') + { if (*++cp == 'x' || *cp == 'X') base = 16, cp++; else base = 8; } - while ((c = *cp) != '\0') { - if (isascii(c) && isdigit(c)) { + while ((c = *cp) != '\0') + { + if (isascii(c) && isdigit(c)) + { val = (val * base) + (c - '0'); cp++; continue; } - if (base == 16 && isascii(c) && isxdigit(c)) { - val = (val << 4) + + if (base == 16 && isascii(c) && isxdigit(c)) + { + val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); cp++; continue; } break; } - if (*cp == '.') { + if (*cp == '.') + { + /* - * Internet format: - * a.b.c.d - * a.b.c (with c treated as 16-bits) - * a.b (with b treated as 24 bits) + * Internet format: a.b.c.d a.b.c (with c treated as + * 16-bits) a.b (with b treated as 24 bits) */ if (pp >= parts + 3 || val > 0xff) return (0); *pp++ = val, cp++; - } else + } + else break; } + /* * Check for trailing characters. */ if (*cp && (!isascii(*cp) || !isspace(*cp))) return (0); + /* - * Concoct the address according to - * the number of parts specified. + * Concoct the address according to the number of parts specified. */ n = pp - parts + 1; - switch (n) { + switch (n) + { - case 1: /* a -- 32 bits */ + case 1: /* a -- 32 bits */ break; - case 2: /* a.b -- 8.24 bits */ + case 2: /* a.b -- 8.24 bits */ if (val > 0xffffff) return (0); val |= parts[0] << 24; break; - case 3: /* a.b.c -- 8.8.16 bits */ + case 3: /* a.b.c -- 8.8.16 bits */ if (val > 0xffff) return (0); val |= (parts[0] << 24) | (parts[1] << 16); break; - case 4: /* a.b.c.d -- 8.8.8.8 bits */ + case 4: /* a.b.c.d -- 8.8.8.8 bits */ if (val > 0xff) return (0); val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); |