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replayitem.c
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replayitem.c
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#include "pgreplay.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <sys/time.h>
/* type for one replay line */
struct replay_item {
struct timeval time;
uint64_t session_id;
replay_type type;
uint16_t count;
char **data;
};
/* special replay_item that signals end-of-file */
static replay_item end_replay_item = {{0, 0}, 0, -1, 0, NULL};
replay_item * const end_item = &end_replay_item;
/* create common part of a replay_item */
static replay_item *replay_create(const struct timeval *time, uint64_t session_id, replay_type type, uint16_t count) {
replay_item *r;
r = malloc(sizeof(struct replay_item));
if (NULL == r) {
fprintf(stderr, "Cannot allocate %lu bytes of memory\n", (unsigned long)sizeof(struct replay_item));
return NULL;
}
r->time.tv_sec = time->tv_sec;
r->time.tv_usec = time->tv_usec;
r->session_id = session_id;
r->type = type;
r->count = count;
if (0 == count) {
r->data = NULL;
} else {
r->data = calloc(count, sizeof(char *));
if (NULL == r->data) {
fprintf(stderr, "Cannot allocate %lu bytes of memory\n", (unsigned long)count * sizeof(char *));
free(r);
return NULL;
}
}
return r;
}
replay_item *replay_create_connect(const struct timeval *time, uint64_t session_id, const char *user, const char *database) {
replay_item *r;
debug(3, "Entering replay_create_connect%s\n", "");
r = replay_create(time, session_id, pg_connect, 2);
if (NULL == r) {
return NULL;
}
(r->data)[0] = malloc(strlen(user) + 1);
if (NULL == (r->data)[0]) {
fprintf(stderr, "Cannot allocate %lu bytes of memory\n", (unsigned long)strlen(user) + 1);
free(r->data);
free(r);
return NULL;
}
strcpy((r->data)[0], user);
(r->data)[1] = malloc(strlen(database) + 1);
if (NULL == (r->data)[1]) {
fprintf(stderr, "Cannot allocate %lu bytes of memory\n", (unsigned long)strlen(user) + 1);
free((r->data)[0]);
free(r->data);
free(r);
return NULL;
}
strcpy((r->data)[1], database);
debug(3, "Leaving replay_create_connect%s\n", "");
return r;
}
replay_item *replay_create_disconnect(const struct timeval *time, uint64_t session_id) {
replay_item *r;
debug(3, "Entering replay_create_disconnect%s\n", "");
r = replay_create(time, session_id, pg_disconnect, 0);
if (NULL == r) {
return NULL;
}
debug(3, "Leaving replay_create_disconnect%s\n", "");
return r;
}
replay_item *replay_create_execute(const struct timeval *time, uint64_t session_id, const char *statement) {
replay_item *r;
debug(3, "Entering replay_create_execute%s\n", "");
r = replay_create(time, session_id, pg_execute, 1);
if (NULL == r) {
return NULL;
}
(r->data)[0] = malloc(strlen(statement) + 1);
if (NULL == (r->data)[0]) {
fprintf(stderr, "Cannot allocate %lu bytes of memory\n", (unsigned long)strlen(statement) + 1);
free(r->data);
free(r);
return NULL;
}
strcpy((r->data)[0], statement);
debug(3, "Leaving replay_create_execute%s\n", "");
return r;
}
replay_item *replay_create_prepare(const struct timeval *time, uint64_t session_id, const char *name, const char *statement) {
replay_item *r;
debug(3, "Entering replay_create_prepare%s\n", "");
r = replay_create(time, session_id, pg_prepare, 2);
if (NULL == r) {
return NULL;
}
(r->data)[0] = malloc(strlen(statement) + 1);
if (NULL == (r->data)[0]) {
fprintf(stderr, "Cannot allocate %lu bytes of memory\n", (unsigned long)strlen(statement) + 1);
free(r->data);
free(r);
return NULL;
}
strcpy((r->data)[0], statement);
(r->data)[1] = malloc(strlen(name) + 1);
if (NULL == (r->data)[1]) {
fprintf(stderr, "Cannot allocate %lu bytes of memory\n", (unsigned long)strlen(name) + 1);
free((r->data)[0]);
free(r->data);
free(r);
return NULL;
}
strcpy((r->data)[1], name);
debug(3, "Leaving replay_create_prepare%s\n", "");
return r;
}
replay_item *replay_create_exec_prepared(const struct timeval *time, uint64_t session_id, const char*name, uint16_t count, char * const *values) {
replay_item *r;
int i;
debug(3, "Entering replay_create_exec_prepared%s\n", "");
r = replay_create(time, session_id, pg_exec_prepared, count + 1);
if (NULL == r) {
return NULL;
}
(r->data)[0] = malloc(strlen(name) + 1);
if (NULL == (r->data)[0]) {
free(r->data);
free(r);
return NULL;
}
strcpy((r->data)[0], name);
for (i=1; i<count+1; ++i) {
if (values[i-1]) {
(r->data)[i] = malloc(strlen(values[i-1]) + 1);
if (NULL == (r->data)[i]) {
fprintf(stderr, "Cannot allocate %lu bytes of memory\n", (unsigned long)strlen(values[i-1]) + 1);
for (--i; i>=0; --i) {
if ((r->data)[i]) {
free((r->data)[i]);
}
}
free(r->data);
free(r);
return NULL;
}
strcpy((r->data)[i], values[i-1]);
} else {
(r->data)[i] = NULL;
}
}
debug(3, "Leaving replay_create_exec_prepared%s\n", "");
return r;
}
replay_item *replay_create_cancel(const struct timeval *time, uint64_t session_id) {
replay_item *r;
debug(3, "Entering replay_create_cancel%s\n", "");
r = replay_create(time, session_id, pg_cancel, 0);
if (NULL == r) {
return NULL;
}
debug(3, "Leaving replay_create_cancel%s\n", "");
return r;
}
void replay_free(replay_item *r) {
int i;
debug(3, "Entering replay_free%s\n", "");
assert((pg_connect == r->type) || (pg_disconnect == r->type) || (pg_execute == r->type) || (pg_prepare == r->type) || (pg_exec_prepared == r->type) || (pg_cancel == r->type));
for (i=0; i<r->count; ++i) {
if ((r->data)[i]) {
free((r->data)[i]);
}
}
if (r->count) {
free(r->data);
}
free(r);
debug(3, "Leaving replay_free%s\n", "");
}
replay_type replay_get_type(const replay_item *r) {
return r->type;
}
uint64_t replay_get_session_id(const replay_item *r) {
return r->session_id;
}
const struct timeval * replay_get_time(const replay_item *r) {
return &(r->time);
}
const char * replay_get_statement(const replay_item *r) {
assert((pg_execute == r->type) || (pg_prepare == r->type));
return (r->data)[0];
}
const char * replay_get_name(const replay_item *r) {
assert((pg_prepare == r->type) || (pg_exec_prepared == r->type));
return (pg_prepare == r->type) ? (r->data)[1] : (r->data)[0];
}
const char * replay_get_user(const replay_item *r) {
assert(pg_connect == r->type);
return (r->data)[0];
}
const char * replay_get_database(const replay_item *r) {
assert(pg_connect == r->type);
return (r->data)[1];
}
int replay_get_valuecount(const replay_item *r) {
assert(pg_exec_prepared == r->type);
return r->count - 1;
}
const char * const * replay_get_values(const replay_item *r) {
assert(pg_exec_prepared == r->type);
return (const char * const *)((r->data) + 1);
}
/* maximal part of a value for display */
#define SAMPLE_SIZE 100
void replay_print_debug(const replay_item *r) {
replay_type type;
int i;
char valuepart[SAMPLE_SIZE+4], *p;
valuepart[SAMPLE_SIZE] = '.';
valuepart[SAMPLE_SIZE+1] = '.';
valuepart[SAMPLE_SIZE+2] = '.';
valuepart[SAMPLE_SIZE+3] = '\0';
debug(1, "---------------------------%s\n", "");
debug(1, "Item: time = %lu.%06lu\n", (unsigned long)r->time.tv_sec, (unsigned long)r->time.tv_usec);
debug(1, " session id = 0x" UINT64_FORMAT "\n", r->session_id);
type = r->type;
debug(1, " type = %s\n",
(pg_connect == type) ? "connect" :
((pg_disconnect == type) ? "disconnect" :
((pg_execute == type) ? "execute" :
((pg_prepare == type) ? "prepare" :
((pg_exec_prepared == type) ? "exec_prepared" :
((pg_cancel == type) ? "cancel" : "unknown")
)
)
)
)
);
switch (type) {
case pg_connect:
debug(1, " user = %s\n", replay_get_user(r));
debug(1, " database = %s\n", replay_get_database(r));
case pg_disconnect:
case pg_cancel:
break;
case pg_prepare:
debug(1, " name = %s\n", replay_get_name(r));
case pg_execute:
debug(1, " statement = %s\n", replay_get_statement(r));
break;
case pg_exec_prepared:
debug(1, " name = %s\n", replay_get_name(r));
for (i=0; i<replay_get_valuecount(r); ++i) {
/* print only the first SAMPLE_SIZE bytes of the argument */
if (replay_get_values(r)[i]) {
strncpy(valuepart, replay_get_values(r)[i], SAMPLE_SIZE);
p = valuepart;
} else {
p = NULL;
}
debug(1, " $%d = %s\n", i + 1, (NULL == p) ? "(null)" : p);
}
break;
}
debug(1, "---------------------------%s\n", "");
}