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Flatten out error-handling so it isn't nested so deeply

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This commit is contained in:
Eric Fischer
2014-09-15 15:47:06 -07:00
parent efa3995d94
commit 3d43c5afbd
1 changed files with 93 additions and 84 deletions
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geojson.c
+36 -27
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@@ -49,7 +49,6 @@ void read_json(FILE *f) {
while (1) {
json_object *j = json_read(jp);
if (j == NULL) {
if (jp->error != NULL) {
fprintf(stderr, "%d: %s\n", jp->line, jp->error);
@@ -60,25 +59,47 @@ void read_json(FILE *f) {
}
json_object *type = json_hash_get(j, "type");
if (type != NULL && type->type == JSON_STRING && strcmp(type->string, "Feature") == 0) {
if (type == NULL || type->type != JSON_STRING || strcmp(type->string, "Feature") != 0) {
continue;
}
json_object *geometry = json_hash_get(j, "geometry");
if (geometry == NULL) {
fprintf(stderr, "%d: feature with no geometry\n", jp->line);
goto next_feature;
}
if (geometry != NULL) {
json_object *geometry_type = json_hash_get(geometry, "type");
if (geometry_type != NULL && geometry_type->type == JSON_STRING) {
int t;
if (geometry_type == NULL || geometry_type->type != JSON_STRING) {
fprintf(stderr, "%d: geometry without type string\n", jp->line);
goto next_feature;
}
json_object *properties = json_hash_get(j, "properties");
if (properties == NULL || properties->type != JSON_HASH) {
fprintf(stderr, "%d: feature without properties hash\n", jp->line);
goto next_feature;
}
json_object *coordinates = json_hash_get(geometry, "coordinates");
if (coordinates == NULL || coordinates->type != JSON_ARRAY) {
fprintf(stderr, "%d: feature without coordinates array\n", jp->line);
goto next_feature;
}
int t;
for (t = 0; t < GEOM_TYPES; t++) {
if (strcmp(geometry_type->string, geometry_names[t]) == 0) {
break;
}
}
if (t >= GEOM_TYPES) {
fprintf(stderr, "%d: Can't handle geometry type %s\n", jp->line, geometry_type->string);
goto next_feature;
}
if (t < GEOM_TYPES) {
json_object *properties = json_hash_get(j, "properties");
json_object *coordinates = json_hash_get(geometry, "coordinates");
if (properties != NULL && properties->type == JSON_HASH) {
/* scope for variable-length arrays */
{
char *metakey[properties->length];
char *metaval[properties->length];
int metatype[properties->length];
@@ -103,9 +124,7 @@ void read_json(FILE *f) {
}
}
if (coordinates != NULL && coordinates->type == JSON_ARRAY) {
int n;
if (t == GEOM_POINT) {
n = 1;
} else {
@@ -137,26 +156,16 @@ void read_json(FILE *f) {
}
if (ok) {
for (i = 0; i < n; i++) {
printf("%f,%f ", lat[i], lon[i]);
}
printf("\n");
// XXX encode(destdir, files, maxn, extra, xoff, pool, n, lat, lon, m, metakey, metaval, metatype);
}
} else {
fprintf(stderr, "%d: feature geometry with no coordinates\n", jp->line);
}
} else {
fprintf(stderr, "%d: feature with no properties\n", jp->line);
}
} else {
fprintf(stderr, "%d: Can't handle geometry type %s\n", jp->line, geometry_type->string);
}
} else {
fprintf(stderr, "%d: geometry has no type\n", jp->line);
}
} else {
fprintf(stderr, "%d: feature with no geometry\n", jp->line);
}
next_feature:
json_free(j);
}
/* XXX check for any non-features in the outer object */
}