diff options
Diffstat (limited to 'src/tiger.c')
| -rw-r--r-- | src/tiger.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/tiger.c b/src/tiger.c index 019e93d..85c9b1f 100644 --- a/src/tiger.c +++ b/src/tiger.c @@ -25,8 +25,10 @@ #define TIGER_STATES_FILE DATADIR "/tiger-states.txt" +#define TIGER_COUNTIES_FILE DATADIR "/tiger-counties.txt" static GSList *state_list; +static GHashTable *county_list; GSList *tiger_get_states() @@ -67,3 +69,39 @@ GSList *tiger_get_states() return state_list; } + +GSList *tiger_get_counties(gchar *state_abbrev) +{ + gchar *contents, **lines, **iter, **tokens; + + if (county_list) + return g_hash_table_lookup(county_list, state_abbrev); + + county_list = g_hash_table_new(g_str_hash, g_str_equal); + if (!g_file_get_contents(TIGER_COUNTIES_FILE, &contents, NULL, NULL)) + { + g_warning("Cannot read TIGER counties file %s\n", TIGER_COUNTIES_FILE); + return NULL; + } + + lines = g_strsplit(contents, "\n", 0); + for (iter = lines; iter && **iter; iter++) + { + struct tiger_county *ct = g_new0(struct tiger_county, 1); + + tokens = g_strsplit(*iter, "\t", 0); + ct->fips_code = g_strdup(tokens[0]); + ct->state_abbrev = g_strdup(tokens[1]); + ct->name = g_strdup(tokens[2]); + + GSList *list = g_hash_table_lookup(county_list, ct->state_abbrev); + list = g_slist_append(list, ct); + g_hash_table_insert(county_list, ct->state_abbrev, list); + + g_strfreev(tokens); + } + g_strfreev(lines); + g_free(contents); + + return g_hash_table_lookup(county_list, state_abbrev); +} |