/*
- Iso2709 record management
-
- Europagate, 1994-1995.
-
- $Log: iso2709.c,v $
- Revision 1.4 1995/02/15 17:45:44 adam
- Bug fix in iso2709 module.
-
+ * Iso2709 record management
+ *
+ * Europagate, 1994-1995.
+ *
+ * $Log: iso2709.c,v $
+ * Revision 1.15 1995/03/31 10:42:41 adam
+ * Bug fix.
+ *
+ * Revision 1.14 1995/03/30 14:22:18 adam
+ * More work on new MARC anchor functions.
+ *
+ * Revision 1.13 1995/03/30 07:33:32 adam
+ * New 2709 function: iso2709_mk.
+ * First implementation of iso2709_a_insert.
+ *
+ * Revision 1.12 1995/03/29 16:08:56 adam
+ * Better error recovery when using bad records.
+ *
+ * Revision 1.11 1995/03/28 16:07:07 adam
+ * New function: iso2709_out. This function is the reverse of iso2709_cvt.
+ *
+ * Revision 1.10 1995/03/10 09:10:56 adam
+ * Removed dbc2709_cvt function. Makes heuristic guess for DBC2709 records.
+ *
+ * Revision 1.9 1995/03/08 12:36:39 adam
+ * New function: dbc2709_cvt.
+ *
+ * Revision 1.8 1995/03/08 12:03:15 adam
+ * Hack: When tags 00? are used, every separator (DC[1-3]) marks
+ * the end of the data field.
+ *
+ * Revision 1.7 1995/02/22 21:28:03 adam
+ * Changed header.
+ *
+ * Revision 1.5 1995/02/22 15:24:14 adam
+ * Function iso2709_cvt makes a litte check for the format. It returns
+ * NULL if the buffer parameter can never be a MARC record.
+ *
+ * Revision 1.4 1995/02/15 17:45:44 adam
+ * Bug fix in iso2709 module.
+ *
* Revision 1.3 1995/02/10 17:05:18 adam
* New function iso2709_display to display MARC records in a
* line-by-line format. The iso2709_cvt function no longer
s++;
}
*d = '\0';
-#if 0
- strncpy (d, s, n);
- d[n] = '\0';
-#endif
}
char *iso2709_read (FILE *inf)
return buf;
}
+Iso2709Rec iso2709_mk (void)
+{
+ Iso2709Rec p;
+
+ if (!(p = malloc (sizeof(*p))))
+ return NULL;
+
+ p->record_length = 0;
+ strncpyx (p->record_status, " ", 1);
+ strncpyx (p->implementation_codes, " ", 4);
+ p->indicator_length = 2;
+ p->identifier_length = 2;
+ p->base_address = 0;
+ strncpyx (p->user_systems, " ", 3);
+ p->length_data_entry = 4;
+ p->length_starting = 5;
+ p->length_implementation = 0;
+ strncpyx (p->future_use, " ", 1);
+
+ p->directory = NULL;
+ return p;
+}
+
Iso2709Rec iso2709_cvt (const char *buf)
{
struct iso2709_dir **dpp, *dp;
p->base_address = atoin (buf+12, 4);
strncpyx (p->user_systems, buf+17, 3);
+ if (p->record_length < 26)
+ {
+ free (p);
+ return NULL;
+ }
p->length_data_entry = atoin (buf+20, 1);
p->length_starting = atoin (buf+21, 1);
p->length_implementation = atoin (buf+22, 1);
*dpp = NULL;
while (buf[pos] != ISO2709_FS)
{
- *dpp = malloc (sizeof(**dpp));
+ if (!(*dpp = malloc (sizeof(**dpp))))
+ {
+ iso2709_rm (p);
+ return NULL;
+ }
(*dpp)->next = NULL;
+ (*dpp)->fields = NULL;
+ (*dpp)->indicator = NULL;
strncpyx ((*dpp)->tag, buf+pos, 3);
pos += 3;
(*dpp)->length = atoin (buf+pos, p->length_data_entry);
pos += p->length_starting + p->length_implementation;
dpp = &(*dpp)->next;
+ if (pos > p->record_length)
+ {
+ iso2709_rm (p);
+ return NULL;
+ }
}
pos++;
/* deal with datafields */
for (dp = p->directory; dp; dp = dp->next)
{
- int tag00;
+ int identifier_flag;
struct iso2709_field **fpp;
int dpos = pos+dp->offset;
+ int epos = pos+dp->offset+dp->length-1;
+ if (epos <= dpos)
+ {
+ iso2709_rm (p);
+ return NULL;
+ }
fpp = &dp->fields;
- *fpp = malloc (sizeof(**fpp));
+ if (!(*fpp = malloc (sizeof(**fpp))))
+ {
+ iso2709_rm (p);
+ return NULL;
+ }
(*fpp)->next = NULL;
- if (p->indicator_length && memcmp (dp->tag, "00", 2))
+
+ identifier_flag = 1;
+ if (p->indicator_length)
{
- dp->indicator = malloc (p->indicator_length+1);
+#if STUPID_ISO_DBC
+ if (buf[dpos+p->indicator_length] != ISO2709_IDFS)
+ identifier_flag = 0;
+#else
+ if (!memcmp (dp->tag, "00", 2))
+ identifier_flag = 0;
+#endif
+ }
+ else if (!memcmp (dp->tag, "00", 2))
+ identifier_flag = 0;
+ if (identifier_flag && p->indicator_length)
+ {
+ if (!(dp->indicator = malloc (p->indicator_length+1)))
+ {
+ iso2709_rm (p);
+ return NULL;
+ }
strncpyx (dp->indicator, buf+dpos, p->indicator_length);
dpos += p->indicator_length;
}
else
dp->indicator = NULL;
-
- if (memcmp (dp->tag, "00", 2))
- tag00 = 0;
- else
- tag00 = 1;
while (1)
{
int dpos_n;
- if (p->identifier_length && !tag00)
+ if (p->identifier_length && identifier_flag)
{
- (*fpp)->identifier = malloc (p->identifier_length+1);
strncpyx ((*fpp)->identifier, buf+dpos+1,
p->identifier_length-1);
- dpos += p->identifier_length;
+ dpos_n = dpos += p->identifier_length;
+ while (buf[dpos_n] != ISO2709_FS && buf[dpos_n] != ISO2709_RS
+ && buf[dpos_n] != ISO2709_IDFS && dpos_n < epos)
+ dpos_n++;
}
else
- (*fpp)->identifier = NULL;
-
- dpos_n = dpos;
- while (buf[dpos_n] != ISO2709_FS && buf[dpos_n] != ISO2709_IDFS &&
- buf[dpos_n] != ISO2709_RS)
- dpos_n++;
-
- (*fpp)->data = malloc (dpos_n - dpos + 1);
+ {
+ *(*fpp)->identifier = '\0';
+ dpos_n = dpos;
+ while (buf[dpos_n] != ISO2709_FS && buf[dpos_n] != ISO2709_RS
+ && dpos_n < epos)
+ dpos_n++;
+ }
+ if (!((*fpp)->data = malloc (dpos_n - dpos + 1)))
+ {
+ iso2709_rm (p);
+ return NULL;
+ }
strncpyx ((*fpp)->data, buf+dpos, dpos_n - dpos);
dpos = dpos_n;
+ if (dpos >= epos)
+ {
+ if (buf[dpos] != ISO2709_FS && buf[dpos] != ISO2709_RS)
+ fprintf (stderr, "Missing separator at end of field "
+ "in %s %s\n", dp->tag, (*fpp)->identifier);
+ break;
+ }
if (buf[dpos] == ISO2709_FS || buf[dpos] == ISO2709_RS)
+ {
+ fprintf (stderr, "Unexpected separator inside field %s %s\n",
+ dp->tag, (*fpp)->identifier);
break;
-
+ }
fpp = &(*fpp)->next;
- *fpp = malloc (sizeof(**fpp));
+ if (!(*fpp = malloc (sizeof(**fpp))))
+ {
+ iso2709_rm (p);
+ return NULL;
+ }
(*fpp)->next = NULL;
}
}
for (field = dir->fields; field; field = field1)
{
- free (field->identifier);
free (field->data);
field1 = field->next;
free (field);
free (dir);
}
}
+
projects / egate.git / blobdiff