00001
00007 #include <stdbool.h>
00008 #include <stdint.h>
00009 #include <stdint.h>
00010 #include <stdio.h>
00011 #include <stdlib.h>
00012 #include <string.h>
00013
00014 #include "check.h"
00015 #include "db5_hdr.h"
00016 #include "db5_types.h"
00017 #include "file.h"
00018 #include "logger.h"
00019
00021 #define DB5_HDR_COUNT_OFFSET 1040
00022
00024 static FILE *db5_hdr;
00025
00027 static uint32_t count;
00028
00029 bool db5_hdr_init()
00030 {
00031 db5_hdr = file_fcaseopen(CONFIG_DB5_DATA_DIR, CONFIG_DB5_HDR_FILE, "rb+");
00032
00033 if (db5_hdr == NULL)
00034 {
00035 add_log(ADDLOG_CRITICAL, "[db5/hdr]init", "unable to init database\n");
00036 return false;
00037 }
00038
00039 if (fseek(db5_hdr, DB5_HDR_COUNT_OFFSET, SEEK_SET) != 0)
00040 {
00041 add_log(ADDLOG_CRITICAL, "[db5/hdr]init", "unable to find count value\n");
00042 return false;
00043 }
00044 if (fread(&count, sizeof(count), 1, db5_hdr) != 1)
00045 {
00046 add_log(ADDLOG_CRITICAL, "[db5/hdr]init", "unable to read count value\n");
00047 return false;
00048 }
00049
00050 return true;
00051 }
00052
00053 bool db5_hdr_free()
00054 {
00055 fclose(db5_hdr);
00056
00057 return true;
00058 }
00059
00060 uint32_t db5_hdr_count()
00061 {
00062 if (count == 0)
00063 {
00064 add_log(ADDLOG_NOTICE, "[db5/hdr]get", "the value count is zero\n");
00065 }
00066 return count;
00067 }
00068
00069 bool db5_hdr_grow(const int delta)
00070 {
00071 count += delta;
00072
00073 if (fseek(db5_hdr, DB5_HDR_COUNT_OFFSET, SEEK_SET) != 0)
00074 {
00075 add_log(ADDLOG_FAIL, "[db5/hdr]add", "unable to find count value\n");
00076 return false;
00077 }
00078 if (fwrite(&count, sizeof(count), 1, db5_hdr) != 1)
00079 {
00080 add_log(ADDLOG_FAIL, "[db5/hdr]add", "unable to write count value\n");
00081 return false;
00082 }
00083 if (fflush(db5_hdr) != 0)
00084 {
00085 add_log(ADDLOG_FAIL, "[db5/hdr]add", "unable to write count value (flush)\n");
00086 return false;
00087 }
00088
00089 return true;
00090 }
00091
