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#include "weekly.h"
void record_free(struct Record *record) {
if (record != NULL) {
free(record->date);
free(record->time);
free(record->host);
free(record->user);
free(record->data);
free(record);
}
}
struct Record *record_parse(const char *content) {
char *next;
struct Record *result;
result = calloc(1, sizeof(*result));
if (!result) {
perror("Unable to allocate record");
return NULL;
}
char *p = strdup(content);
next = strtok(p, "\n");
while (next != NULL) {
char key[10] = {0};
char value[255] = {0};
sscanf(next, "## %9[^: ]:%254s[^\n]", key, value);
if (strncmp(next, "## ", 3) != 0) {
break;
}
if (!strcmp(key, "date"))
result->date = strdup(value);
else if (!strcmp(key, "time"))
result->time = strdup(value);
else if (!strcmp(key, "author"))
result->user = strdup(value);
else if (!strcmp(key, "host"))
result->host = strdup(value);
next = strtok(NULL, "\n");
}
if (next != NULL) {
if (memcmp(next, "\x02\x02\x02", 3) == 0) {
next += 4;
}
result->data = strdup(next);
} else {
// Empty data record, die
record_free(result);
result = NULL;
}
free(p);
return result;
}
struct Record *record_read(FILE **fp) {
ssize_t soh, sot, eot;
size_t record_size;
char task[2] = {0};
char *buf;
if (!*fp) {
return NULL;
}
// Start of header offset
soh = 0;
// Start of text offset
sot = 0;
// End of text offset
eot = 0;
while (fread(task, sizeof(char), 1, *fp) > 0) {
if (task[0] == '\x01' && fread(task, sizeof(char), 2, *fp) > 0) {
// start header
if (memcmp(task, "\x01\x01", 2) == 0) {
soh = ftell(*fp);
}
} else if (task[0] == '\x02' && fread(task, sizeof(char), 2, *fp) > 0) {
if (memcmp(task, "\x02\x02", 2) == 0) {
sot = ftell(*fp);
}
// start of text
} else if (task[0] == '\x03' && fread(task, sizeof(char), 2, *fp) > 0) {
if (memcmp(task, "\x03\x03", 2) == 0) {
eot = ftell(*fp);
break;
}
} else {
continue;
}
memset(task, '\0', sizeof(task));
}
// Verify the record is not too small, and contained a start of text marker
record_size = eot - soh;
if (record_size < 1 && !sot) {
return NULL;
}
// Allocate enough space for the record
buf = calloc(record_size + 1, sizeof(char));
if (!buf) {
perror("Unable to allocate record");
exit(1);
}
// Go back to start of header
fseek(*fp, soh, SEEK_SET);
// Read the entire record
fread(buf, sizeof(char), record_size, *fp);
// Remove end of text marker
memset(buf + (record_size - 4), '\0', 4);
// Truncate buffer at end of line
buf[strlen(buf) - 1] = '\0';
// Emit record
struct Record *result;
result = record_parse(buf);
free(buf);
return result;
}
void record_show(struct Record *record, int style) {
const char *fmt;
switch (style) {
case RECORD_STYLE_LONG:
fmt = "## Date: %s\n## Time: %s\n## User: %s\n## Host: %s\n%s\n";
break;
case RECORD_STYLE_CSV:
fmt = "%s,%s,%s,%s,\"%s\""; // Trailing linefeed omitted for visual clarity
break;
case RECORD_STYLE_DICT:
fmt = "{"
"\"date\": \"%s\",\n"
"\"time\": \"%s\",\n"
"\"user\": \"%s\",\n"
"\"host\": \"%s\",\n"
"\"data\": \"%s\"}\n";
break;
case RECORD_STYLE_SHORT:
default:
fmt = "%s - %s - %s (%s):\n%s\n";
break;
}
printf(fmt, record->date, record->time, record->user, record->host, record->data);
}
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