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| 1 | +/*------------------------------------------------------------------------- |
| 2 | + * |
| 3 | + * compat.c |
| 4 | + * Reimplementations of various backend functions. |
| 5 | + * |
| 6 | + * Portions Copyright (c) 2012, PostgreSQL Global Development Group |
| 7 | + * |
| 8 | + * IDENTIFICATION |
| 9 | + * contrib/pg_xlogdump/compat.c |
| 10 | + * |
| 11 | + * This file contains client-side implementations for various backend |
| 12 | + * functions that the rm_desc functions in *desc.c files rely on. |
| 13 | + * |
| 14 | + *------------------------------------------------------------------------- |
| 15 | + */ |
| 16 | + |
| 17 | +/* ugly hack, same as in e.g pg_controldata */ |
| 18 | +#define FRONTEND 1 |
| 19 | +#include "postgres.h" |
| 20 | + |
| 21 | +#include <time.h> |
| 22 | + |
| 23 | +#include "utils/datetime.h" |
| 24 | +#include "lib/stringinfo.h" |
| 25 | + |
| 26 | +/* copied from timestamp.c */ |
| 27 | +pg_time_t |
| 28 | +timestamptz_to_time_t(TimestampTz t) |
| 29 | +{ |
| 30 | + pg_time_t result; |
| 31 | + |
| 32 | +#ifdef HAVE_INT64_TIMESTAMP |
| 33 | + result = (pg_time_t) (t / USECS_PER_SEC + |
| 34 | + ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY)); |
| 35 | +#else |
| 36 | + result = (pg_time_t) (t + |
| 37 | + ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY)); |
| 38 | +#endif |
| 39 | + return result; |
| 40 | +} |
| 41 | + |
| 42 | +/* |
| 43 | + * Stopgap implementation of timestamptz_to_str that doesn't depend on backend |
| 44 | + * infrastructure. |
| 45 | + * |
| 46 | + * XXX: The backend timestamp infrastructure should instead be split out and |
| 47 | + * moved into src/common. |
| 48 | + */ |
| 49 | +const char * |
| 50 | +timestamptz_to_str(TimestampTz dt) |
| 51 | +{ |
| 52 | + static char buf[MAXDATELEN + 1]; |
| 53 | + static char ts[MAXDATELEN + 1]; |
| 54 | + static char zone[MAXDATELEN + 1]; |
| 55 | + pg_time_t result = timestamptz_to_time_t(dt); |
| 56 | + struct tm *ltime = localtime(&result); |
| 57 | + |
| 58 | + strftime(ts, sizeof(zone), "%Y-%m-%d %H:%M:%S", ltime); |
| 59 | + strftime(zone, sizeof(zone), "%Z", ltime); |
| 60 | + |
| 61 | +#ifdef HAVE_INT64_TIMESTAMP |
| 62 | + sprintf(buf, "%s.%06d %s", ts, (int)(dt % USECS_PER_SEC), zone); |
| 63 | +#else |
| 64 | + sprintf(buf, "%s.%.6f %s", ts, fabs(dt - floor(dt)), zone); |
| 65 | +#endif |
| 66 | + |
| 67 | + return buf; |
| 68 | +} |
| 69 | + |
| 70 | +/* |
| 71 | + * Provide a hacked up compat layer for StringInfos so xlog desc functions can |
| 72 | + * be linked/called. |
| 73 | + */ |
| 74 | +void |
| 75 | +appendStringInfo(StringInfo str, const char *fmt, ...) |
| 76 | +{ |
| 77 | + va_list args; |
| 78 | + |
| 79 | + va_start(args, fmt); |
| 80 | + vprintf(fmt, args); |
| 81 | + va_end(args); |
| 82 | +} |
| 83 | + |
| 84 | +void |
| 85 | +appendStringInfoString(StringInfo str, const char *string) |
| 86 | +{ |
| 87 | + appendStringInfo(str, "%s", string); |
| 88 | +} |
| 89 | + |
| 90 | +void |
| 91 | +appendStringInfoChar(StringInfo str, char ch) |
| 92 | +{ |
| 93 | + appendStringInfo(str, "%c", ch); |
| 94 | +} |
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