add a database of groups to, well, group IDs

tracer/Makefile

@@ -8,7 +8,7 @@ CFLAGS += -DT_USE_SHARED_MEMORY
 LIBS += -lrt
 
 PROG=tracer
-OBJS=main.o plot.o
+OBJS=main.o plot.o t_data.o
 
 $(PROG): $(OBJS)
 	$(CC) $(CFLAGS) -o $(PROG) $(OBJS) $(LIBS)

tracer/defs.h

@@ -5,4 +5,8 @@ void *make_plot(int width, int height, int bufsize);
 void plot_set(void *plot, float *data, int len, int pos);
 void iq_plot_set(void *plot, short *data, int len, int pos);
 
+/* returns an opaque pointer - truly a 'database *', see t_data.c */
+void *parse_database(char *filename);
+void dump_database(void *database);
+
 #endif /* _TRACER_DEFS_H_ */

tracer/main.c

@@ -257,11 +257,16 @@ void init_shm(void)
 
 #endif /* T_USE_SHARED_MEMORY */
 
-int main(void)
+int main(int n, char **v)
 {
+  void *database;
   int s;
   int l;
   char t;
+
+  database = parse_database("../T_messages.txt");
+  dump_database(database);
+
 #ifdef T_USE_SHARED_MEMORY
   init_shm();
 #endif

tracer/t_data.c

+#include "defs.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+
+typedef struct {
+  char *name;
+  char *desc;
+} id;
+
+typedef struct {
+  char *name;
+  char **ids;
+  int size;
+} group;
+
+typedef struct {
+  id *i;
+  int isize;
+  group *g;
+  int gsize;
+} database;
+
+typedef struct {
+  char *data;
+  int size;
+  int maxsize;
+} buffer;
+
+typedef struct {
+  buffer name;
+  buffer value;
+} parser;
+
+void put(buffer *b, int c)
+{
+  if (b->size == b->maxsize) {
+    b->maxsize += 256;
+    b->data = realloc(b->data, b->maxsize);
+    if (b->data == NULL) { printf("memory allocation error\n"); exit(1); }
+  }
+  b->data[b->size] = c;
+  b->size++;
+}
+
+void smash_spaces(FILE *f)
+{
+  int c;
+  while (1) {
+    c = fgetc(f);
+    if (isspace(c)) continue;
+    if (c == ' ') continue;
+    if (c == '\t') continue;
+    if (c == '\n') continue;
+    if (c == 10 || c == 13) continue;
+    if (c == '#') {
+      while (1) {
+        c = fgetc(f);
+        if (c == '\n' || c == EOF) break;
+      }
+      continue;
+    }
+    break;
+  }
+  if (c != EOF) ungetc(c, f);
+}
+
+void get_line(parser *p, FILE *f, char **name, char **value)
+{
+  int c;
+  p->name.size = 0;
+  p->value.size = 0;
+  *name = NULL;
+  *value = NULL;
+  smash_spaces(f);
+  c = fgetc(f);
+  while (!(c == '=' || isspace(c) || c == EOF))
+    { put(&p->name, c); c = fgetc(f); }
+  if (c == EOF) return;
+  put(&p->name, 0);
+  while (!(c == EOF || c == '=')) c = fgetc(f);
+  if (c == EOF) return;
+  smash_spaces(f);
+  c = fgetc(f);
+  while (!(c == 10 || c == 13 || c == EOF))
+    { put(&p->value, c); c = fgetc(f); }
+  put(&p->value, 0);
+  if (p->name.size <= 1) return;
+  if (p->value.size <= 1) return;
+  *name = p->name.data;
+  *value = p->value.data;
+}
+
+void add_id(database *r, char *id)
+{
+  if ((r->isize & 1023) == 0) {
+    r->i = realloc(r->i, (r->isize + 1024) * sizeof(id));
+    if (r->i == NULL) { printf("out of memory\n"); exit(1); }
+  }
+  r->i[r->isize].name = strdup(id);
+  if (r->i[r->isize].name == NULL) { printf("out of memory\n"); exit(1); }
+  r->isize++;
+}
+
+int group_cmp(const void *_p1, const void *_p2)
+{
+  const group *p1 = _p1;
+  const group *p2 = _p2;
+  return strcmp(p1->name, p2->name);
+}
+
+group *get_group(database *r, char *group_name)
+{
+  group gsearch;
+  group *ret;
+
+  gsearch.name = group_name;
+  ret = bsearch(&gsearch, r->g, r->gsize, sizeof(group), group_cmp);
+  if (ret != NULL) return ret;
+
+  if ((r->gsize & 1023) == 0) {
+    r->g = realloc(r->g, (r->gsize + 1024) * sizeof(group));
+    if (r->g == NULL) abort();
+  }
+  r->g[r->gsize].name = strdup(group_name);
+  if (r->g[r->gsize].name == NULL) abort();
+  r->g[r->gsize].ids = NULL;
+  r->g[r->gsize].size = 0;
+  r->gsize++;
+
+  qsort(r->g, r->gsize, sizeof(group), group_cmp);
+
+  return bsearch(&gsearch, r->g, r->gsize, sizeof(group), group_cmp);
+}
+
+void group_add_id(group *g, char *id)
+{
+  if ((g->size & 1023) == 0) {
+    g->ids = realloc(g->ids, (g->size + 1024) * sizeof(char *));
+    if (g->ids == NULL) abort();
+  }
+  g->ids[g->size] = id;
+  g->size++;
+}
+
+void add_groups(database *r, char *groups)
+{
+  group *g;
+
+  while (1) {
+    char *start = groups;
+    char *end = start;
+    while (!isspace(*end) && *end != ':' && *end != 0) end++;
+    if (end == start) {
+      printf("bad group line: groups are seperated by ':'\n");
+      abort();
+    }
+    if (*end == 0) end = NULL; else *end = 0;
+
+    g = get_group(r, start);
+    group_add_id(g, r->i[r->isize-1].name);
+
+    if (end == NULL) break;
+    end++;
+    while ((isspace(*end) || *end == ':') && *end != 0) end++;
+    if (*end == 0) break;
+    groups = end;
+  }
+}
+
+void *parse_database(char *filename)
+{
+  FILE *in;
+  parser p;
+  database *r;
+  char *name, *value;
+
+  r = calloc(1, sizeof(*r)); if (r == NULL) abort();
+  memset(&p, 0, sizeof(p));
+
+  in = fopen(filename, "r"); if (in == NULL) { perror(filename); abort(); }
+
+  while (1) {
+    get_line(&p, in, &name, &value);
+    if (name == NULL) break;
+    printf("%s %s\n", name, value);
+    if (!strcmp(name, "ID")) add_id(r, value);
+    if (!strcmp(name, "GROUP")) add_groups(r, value);
+  }
+
+  fclose(in);
+  free(p.name.data);
+  free(p.value.data);
+
+  return r;
+}
+
+void dump_database(void *_d)
+{
+  database *d = _d;
+  int i;
+
+  printf("database: %d IDs, %d GROUPs\n", d->isize, d->gsize);
+  for (i = 0; i < d->isize; i++)
+    printf("ID %s [%s]\n", d->i[i].name, d->i[i].desc);
+  for (i = 0; i < d->gsize; i++) {
+    int j;
+    printf("GROUP %s [size %d]\n", d->g[i].name, d->g[i].size);
+    for (j = 0; j < d->g[i].size; j++)
+      printf("  ID %s\n", d->g[i].ids[j]);
+  }
+}