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/* Prism Versioning
* Copyright 2014 Jeffrey Armstrong <jeff@rainbow-100.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys\types.h>
#include <sys\stat.h>
#include <direct.h>
#include <errno.h>
#include <io.h>
#include "prism.h"
#define DB_FILENAME PDB_DIR DIR_SEP "db.txt"
#define MSG_FILENAME PDB_DIR DIR_SEP "message.txt"
#define DB_TEMPNAME PDB_DIR DIR_SEP "db.tmp"
static int temp_to_permanent()
{
struct stat fileres;
int res;
res = stat(DB_TEMPNAME, &fileres);
if(res != 0)
return PRET_OK;
res = stat(DB_FILENAME, &fileres);
if(res == 0) {
if(unlink(DB_FILENAME) != 0)
return PRET_UPDATEFAIL;
}
if(rename(DB_TEMPNAME, DB_FILENAME) != 0)
return PRET_UPDATEFAIL;
return PRET_OK;
}
int initdb()
{
FILE *fpdb;
FILE *fpmsg;
if(mkdir(PDB_DIR) != 0) {
if(errno == EEXIST)
return PRET_EXISTS;
else if(errno == EACCES)
return PRET_PERMISSION;
else
return PRET_ERROR;
}
fpdb = fopen(DB_FILENAME, "w");
fprintf(fpdb, "0\n");
fclose(fpdb);
fpmsg = fopen(MSG_FILENAME, "w");
fprintf(fpmsg, "0\tInitialized\n");
fclose(fpmsg);
return PRET_OK;
}
int get_revision()
{
FILE *fpdb;
char *line;
char *numend;
int rev;
fpdb = fopen(DB_FILENAME, "r");
if(fpdb == NULL)
return PRET_ERROR;
line = (char *)malloc(32*sizeof(char));
if(line == NULL)
return PRET_ERROR;
if(fgets(line, 32, fpdb) == NULL)
return PRET_ERROR;
fclose(fpdb);
rev = strtol(line,&numend,16);
free(line);
return rev;
}
int get_file_count()
{
FILE *fpdb;
char *line;
int ret;
fpdb = fopen(DB_FILENAME, "r");
if(fpdb == NULL)
return PRET_ERROR;
line = (char *)malloc(512*sizeof(char));
if(line == NULL)
return PRET_ERROR;
ret = -1;
while(fgets(line, 512, fpdb) != NULL) ret++;
fclose(fpdb);
free(line);
return ret;
}
int increment_revision()
{
int rev;
FILE *fpdb;
FILE *tempdb;
char *line;
rev = get_revision();
if(rev < 0)
return rev;
fpdb = fopen(DB_FILENAME, "r");
if(fpdb == NULL)
return PRET_READERROR;
tempdb = fopen(DB_TEMPNAME, "w");
if(tempdb == NULL) {
fclose(fpdb);
return PRET_WRITEERROR;
}
line = (char *)malloc(512*sizeof(char));
if(line == NULL) {
fclose(fpdb);
fclose(tempdb);
return PRET_ERROR;
}
rev++;
fprintf(tempdb, "%x\n", rev);
fgets(line, 512, fpdb);
while(fgets(line, 512, fpdb) != NULL) fprintf(tempdb, line);
fclose(fpdb);
fclose(tempdb);
temp_to_permanent();
free(line);
return rev;
}
int add_file(const char *filename)
{
int rev;
return PRET_OK;
}
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