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/*
target is in current directory:
entries_single/<PLZ> entries_multi/<PLZ>
<PLZ> is either [0-9_]{5} or _____ or brken
opens files in source directory:
01_Flags 02_Nachname 03_Vorname 04_Zusaetze 07_Strasse 08_Hausnummer 09_Verweise 10_Postleitzahl
11_Ort 12_Vorwahl 13_Rufnummer 14_15_Email_Webadresse 16_Koordinaten
appends to all of the above dirs plus
00_Jahr
*/
#include <sys/stat.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include <unistd.h>
#include <err.h>
enum { F_00, F_01, F_10, F_02, F_03, F_04, F_07, F_08, F_09, F_11, F_12, F_13, F_14, F_15, F_16, F_COUNT };
static char *g_filenames[] = {
"00_Jahr", "01_Flags", "10_Postleitzahl", "02_Nachname", "03_Vorname", "04_Zusaetze", "07_Strasse", "08_Hausnummer", "09_Verweise", "11_Ort", "12_Vorwahl", "13_Rufnummer", "14_Webadresse", "15_Email", "16_Koordinaten" };
typedef struct {
char plz[8];
FILE * file;
} outhandle;
static outhandle g_outhandles[32*1024];
static int g_outhandle_count;
FILE * fopen_prefix(char *prefix, int file_id, int readonly) {
char filename[1024];
snprintf( filename, sizeof(filename), "%s/%s", prefix, g_filenames[file_id]);
return fopen(filename, readonly ? "r" : "a");
}
/* This function gives us a binary search that returns a pointer, even if
no exact match is found. In that case it sets exactmatch 0 and gives
calling functions the chance to insert data
*/
void *binary_search( const void * const key, const void * base, const size_t member_count, const size_t member_size,
size_t compare_size, int *exactmatch ) {
size_t interval = member_count;
while( interval ) {
uint8_t *lookat = ((uint8_t*)base) + member_size * ( interval / 2 );
int cmp = memcmp( lookat, key, compare_size );
if(cmp == 0 ) {
base = lookat;
break;
}
if(cmp < 0) {
base = lookat + member_size;
interval--;
}
interval /= 2;
}
*exactmatch = interval;
return (void*)base;
}
FILE * get_file_for_postleitzahl(char *plz) {
int exactmatch = 0;
outhandle * oh = (outhandle *)binary_search(plz, g_outhandles, g_outhandle_count, sizeof(outhandle), 5, &exactmatch);
if (!exactmatch) {
size_t s = (g_outhandles + g_outhandle_count) - oh;
memmove(oh + 1, oh, s * sizeof(outhandle));
oh->file = fopen(plz, "a");
if (!oh->file) errx( 1, "Couldn't open file %s for writing\n", plz);
memcpy(oh->plz, plz, 5);
g_outhandle_count++;
}
return oh->file;
}
int main(int argc, char **args) {
FILE * in_handles[F_COUNT] = { NULL };
FILE * out_handle = NULL;
char flags[4], outfile[6];
int i, in_multi = 0;
char *input = malloc(1024);
size_t input_size = 1024;
if (argc != 1) exit(1);
/* First open all input files */
for (i=F_01; i<F_COUNT; ++i) {
in_handles[i] = fopen_prefix(args[1], i, 1);
if (!in_handles[i])
errx( 1, "Couldn't open file %s\n", g_filenames[i]);
}
mkdir("output", 0755);
chdir("output");
/* Get Flags to check if we're processing a continuation */
while (fgets(flags, 4, in_handles[F_01])) {
ssize_t linelen;
char flag = strtoul(flags, 0, 16);
/* If we're in multiline mode, we just copy lines as long as we see continuations */
if (in_multi) {
if (flag & 0x2) {
fputs(args[1], out_handle); // write Jahr
fputc(10, out_handle);
fwrite(flags, 3, 1, out_handle); // copy Flags verbatim
for (i=F_10; i<F_COUNT; ++i) { // process the rest of entries
ssize_t linelen = getline(&input, &input_size, in_handles[i]);
fwrite(input, linelen, 1, out_handle);
}
continue;
}
in_multi = 0;
}
if (flag & 0x1)
in_multi = 1;
/* Read Postleitzahl to get destination */
linelen = getline(&input, &input_size, in_handles[F_10]);
if (linelen && input[linelen - 1] == 10) { // chomp
input[linelen - 1] = 0;
--linelen;
}
if (linelen == 0) // empty PLZ
strcpy(outfile, "_____");
else if (linelen == 5) { // potentially normal
int broken = 0;
for (i=0; i<5; ++i) {
if ( (input[i] < '0' || input[i] > '9') && input[i] != '.') {
broken = 1;
break;
}
outfile[i] = input[i];
if (outfile[i] == '.') outfile[i] = '_';
}
outfile[5] = 0;
if (broken)
strcpy(outfile, "brken");
} else
strcpy(outfile, "brken");
out_handle = get_file_for_postleitzahl(outfile);
fputs(args[1], out_handle); // write Jahr
fputc(10, out_handle);
fwrite(flags, 3, 1, out_handle); // copy Flags verbatim
fputs(input, out_handle); // copy Postleitzahl verbatim
fputc(10, out_handle);
for (i=F_02; i<F_COUNT; ++i) { // process the rest of entries
ssize_t linelen = getline(&input, &input_size, in_handles[i]);
fwrite(input, linelen, 1, out_handle);
}
}
for (i=0; i<g_outhandle_count; ++i)
fclose(g_outhandles[i].file);
return 0;
}
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