map.c

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#include <string.h>
 
#include <jansson.h>
 
#include "log.h"
#include "tileset.h"
#include "tmj.h"
 
Property* unpack_properties(json_t* properties) {
    if (properties == NULL) {
        return NULL;
    }
 
    if (!json_is_array(properties)) {
        logmsg(TMJ_LOG_ERR, "'properties' must be an array");
 
        return NULL;
    }
 
    json_error_t error;
 
    size_t property_count = json_array_size(properties);
 
    Property* ret = calloc(property_count, sizeof(Property));
 
    if (ret == NULL) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack properties, the system is out of memory");
 
        return NULL;
    }
 
    json_t* value;
 
    size_t idx = 0;
    json_t* property = NULL;
 
    json_array_foreach(properties, idx, property) {
        int unpk = json_unpack_ex(property,
                &error,
                0,
                "{s:s, s?s, s?s, s:o}",
                "name",
                &ret[idx].name,
                "type",
                &ret[idx].type,
                "propertytype",
                &ret[idx].propertytype,
                "value",
                &value);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Unable to unpack properties, %s at line %d column %d", error.text, error.line, error.column);
 
            free(ret);
 
            return NULL;
        }
 
        // note: string is default type, so missing field means string
        if (ret[idx].type == NULL || strcmp(ret[idx].type, "string") == 0) {
            unpk = json_unpack_ex(value, &error, 0, "s", &ret[idx].value_string);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack string value from property, %s at line %d column %d", error.text, error.line, error.column);
 
                free(ret);
 
                return NULL;
            }
        }
 
        if (strcmp(ret[idx].type, "int") == 0) {
            unpk = json_unpack_ex(value, &error, 0, "i", &ret[idx].value_int);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack integer value from property, %s at line %d column %d", error.text, error.line, error.column);
 
                free(ret);
 
                return NULL;
            }
        }
 
        if (strcmp(ret[idx].type, "float") == 0) {
            unpk = json_unpack_ex(value, &error, 0, "i", &ret[idx].value_float);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack float value from property, %s at line %d column %d", error.text, error.line, error.column);
 
                free(ret);
 
                return NULL;
            }
        }
 
        if (strcmp(ret[idx].type, "bool") == 0) {
            unpk = json_unpack_ex(value, &error, 0, "b", &ret[idx].value_bool);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack bool value from property, %s at line %d column %d", error.text, error.line, error.column);
 
                free(ret);
 
                return NULL;
            }
        }
 
        if (strcmp(ret[idx].type, "color") == 0) {
            unpk = json_unpack_ex(value, &error, 0, "s", &ret[idx].value_color);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack color value from property, %s at line %d column %d", error.text, error.line, error.column);
 
                free(ret);
 
                return NULL;
            }
        }
 
        if (strcmp(ret[idx].type, "file") == 0) {
            unpk = json_unpack_ex(value, &error, 0, "s", &ret[idx].value_file);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack file value from property, %s at line %d column %d", error.text, error.line, error.column);
 
                free(ret);
 
                return NULL;
            }
        }
 
        if (strcmp(ret[idx].type, "object") == 0) {
            unpk = json_unpack_ex(value, &error, 0, "i", &ret[idx].value_object);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack object value from property, %s at line %d column %d", error.text, error.line, error.column);
 
                free(ret);
 
                return NULL;
            }
        }
    }
 
    return ret;
}
 
Point* unpack_points(json_t* points) {
    if (points == NULL) {
        return NULL;
    }
 
    if (!json_is_array(points)) {
        logmsg(TMJ_LOG_ERR, "'polygon' or 'polyline' must be an array");
 
        return NULL;
    }
 
    json_error_t error;
 
    size_t point_count = json_array_size(points);
 
    Point* ret = calloc(point_count, sizeof(Point));
 
    if (ret == NULL) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack points, the system is out of memory");
 
        return NULL;
    }
 
    size_t idx;
    json_t* point;
 
    json_array_foreach(points, idx, point) {
        int unpk = json_unpack_ex(point, &error, 0, "{s:F, s:F}", "x", &ret[idx].x, "y", &ret[idx].y);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Unable to unpack points, %s at line %d column %d", error.text, error.line, error.column);
 
            free(ret);
 
            return NULL;
        }
    }
 
    return ret;
}
 
Text* unpack_text(json_t* text) {
    if (text == NULL) {
        return NULL;
    }
 
    json_error_t error;
 
    Text* ret = calloc(1, sizeof(Text));
 
    if (ret == NULL) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack text, the system is out of memory");
 
        return NULL;
    }
 
    int unpk = json_unpack_ex(text,
            &error,
            0,
            "{"
            "s?b, s?b, s?b, s?b, s?b, s?b,"
            "s?s, s?s, s?s, s:s, s?s, s?i"
            "}",
            "bold",
            &ret->bold,
            "italic",
            &ret->italic,
            "kerning",
            &ret->kerning,
            "strikeout",
            &ret->strikeout,
            "underline",
            &ret->underline,
            "wrap",
            &ret->wrap,
            "color",
            &ret->color,
            "fontfamily",
            &ret->fontfamily,
            "halign",
            &ret->halign,
            "text",
            &ret->text,
            "valign",
            &ret->valign,
            "pixelsize",
            &ret->pixelsize);
    if (unpk == -1) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack text, %s at line %d column %d", error.text, error.line, error.column);
 
        free(ret);
 
        return NULL;
    }
 
    return ret;
}
 
Object* unpack_objects(json_t* objects) {
    if (objects == NULL) {
        return NULL;
    }
 
    if (!json_is_array(objects)) {
        logmsg(TMJ_LOG_ERR, "'objects' must be an array");
    }
 
    json_error_t error;
 
    size_t object_count = json_array_size(objects);
 
    Object* ret = calloc(object_count, sizeof(Object));
 
    if (ret == NULL) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack objects, the system is out of memory");
 
        return NULL;
    }
 
    size_t idx = 0;
    json_t* object = NULL;
 
    json_array_foreach(objects, idx, object) {
        json_t* properties = NULL;
        json_t* text = NULL;
        json_t* polygon = NULL;
        json_t* polyline = NULL;
 
        // Unpack scalar values
        int unpk = json_unpack_ex(object,
                &error,
                0,
                "{"
                "s?b, s?b, s:b,"
                "s:s, s?s, s?s,"
                "s?i, s:i,"
                "s:F, s:F, s:F, s:F, s:F,"
                "s?o, s?o, s?o, s?o"
                "}",
                "ellipse",
                &ret[idx].ellipse,
                "point",
                &ret[idx].point,
                "visible",
                &ret[idx].visible,
                "name",
                &ret[idx].name,
                "template",
                &ret[idx].template,
                "type",
                &ret[idx].type,
                "gid",
                &ret[idx].gid,
                "id",
                &ret[idx].id,
                "height",
                &ret[idx].height,
                "rotation",
                &ret[idx].rotation,
                "width",
                &ret[idx].width,
                "x",
                &ret[idx].x,
                "y",
                &ret[idx].y,
                "properties",
                &properties,
                "text",
                &text,
                "polygon",
                &polygon,
                "polyline",
                &polyline);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Unable to unpack object, %s at line %d column %d", error.text, error.line, error.column);
 
            return NULL;
        }
 
        // Unpack properties
        if (properties != NULL) {
            if (!json_is_array(properties)) {
                logmsg(TMJ_LOG_ERR, "'properties' must be an array");
 
                goto fail_properties;
            }
 
            ret[idx].properties = unpack_properties(properties);
 
            if (ret[idx].properties == NULL) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack object properties");
 
                goto fail_properties;
            }
 
            ret[idx].property_count = json_array_size(properties);
        }
 
        // Unpack text
        if (text != NULL) {
            ret[idx].text = unpack_text(text);
 
            if (ret[idx].text == NULL) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack object text");
 
                goto fail_text;
            }
        }
 
        // If this object is any of the below items, we don't need to unpack anything else
        if (ret[idx].ellipse || ret[idx].point || ret[idx].gid != 0 || ret[idx].text != NULL) {
            continue;
        }
 
        // Unpack Polygon
        if (polygon != NULL) {
            ret[idx].polygon = unpack_points(polygon);
 
            if (ret[idx].polygon == NULL) {
                goto fail_polygon;
            }
 
            ret[idx].polygon_point_count = json_array_size(polygon);
 
            // No need to unpack a polyline if this object was a polygon
            continue;
        }
 
        // Unpack Polyline
        if (polyline != NULL) {
            ret[idx].polyline = unpack_points(polyline);
 
            if (ret[idx].polyline == NULL) {
                goto fail_polyline;
            }
 
            ret[idx].polyline_point_count = json_array_size(polyline);
        }
    }
 
    return ret;
 
fail_polygon:
fail_polyline:
    for (size_t i = 0; i < object_count; i++) {
        free(ret[i].text);
    }
 
fail_text:
    for (size_t i = 0; i < object_count; i++) {
        free(ret[i].properties);
    }
 
fail_properties:
    free(ret);
 
    return NULL;
}
 
void free_objects(Object* objects, size_t object_count) {
    for (size_t i = 0; i < object_count; i++) {
        // We don't bother freeing polyline, because polygon and polyline are a union
        free(objects[i].polygon);
        free(objects[i].text);
        free(objects[i].properties);
    }
 
    free(objects);
}
 
Chunk* unpack_chunks(json_t* chunks, size_t* chunk_count) {
    if (chunks == NULL) {
        return NULL;
    }
 
    if (!json_is_array(chunks)) {
        logmsg(TMJ_LOG_ERR, "Could not unpack layer chunks, 'chunks' must be an array");
 
        return NULL;
    }
 
    json_error_t error;
 
    *chunk_count = json_array_size(chunks);
 
    Chunk* ret = calloc(*chunk_count, sizeof(Chunk));
 
    if (ret == NULL) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack chunks, the system is out of memory");
 
        return NULL;
    }
 
    size_t idx;
    json_t* chunk;
 
    json_array_foreach(chunks, idx, chunk) {
        json_t* data = NULL;
 
        int unpk = json_unpack_ex(chunk,
                &error,
                0,
                "{"
                "s:i, s:i, s:i, s:i,"
                "s:o,"
                "}",
                "height",
                &ret[idx].height,
                "width",
                &ret[idx].width,
                "x",
                &ret[idx].x,
                "y",
                &ret[idx].y,
                "data",
                &data);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Unable to unpack chunk, %s at line %d column %d", error.text, error.line, error.column);
 
            goto fail_chunk;
        }
 
        if (json_is_string(data)) {
            unpk = json_unpack_ex(data, &error, 0, "s", &ret[idx].data_str);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack chunk data, %s at line %d column %d", error.text, error.line, error.column);
 
                goto fail_chunk;
            }
 
            ret[idx].data_is_str = true;
        } else if (json_is_array(data)) {
            size_t datum_count = json_array_size(data);
 
            ret[idx].data_uint = calloc(datum_count, sizeof(unsigned int));
 
            if (ret[idx].data_uint == NULL) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack chunk data, the system is out memory");
 
                goto fail_chunk;
            }
 
            size_t idx2;
            json_t* datum;
 
            json_array_foreach(data, idx2, datum) {
                unpk = json_unpack_ex(datum, &error, 0, "i", &ret[idx].data_uint[idx2]);
 
                if (unpk == -1) {
                    logmsg(TMJ_LOG_ERR, "Unable to unpack chunk datum, %s at line %d column %d", error.text, error.line, error.column);
 
                    goto fail_data;
                }
            }
        } else {
            logmsg(TMJ_LOG_ERR, "Unable to unpack chunk, chunk data must be a string or an array of uint");
 
            goto fail_chunk;
        }
    }
 
    return ret;
 
fail_data:
    for (size_t i = 0; i < *chunk_count; i++) {
        if (!ret[i].data_is_str) {
            free(ret[i].data_uint);
        }
    }
 
fail_chunk:
    free(ret);
 
    return NULL;
}
 
// Helper function for freeing chunks, since they contain dynamically-allocated arrays
void free_chunks(Chunk* chunks, size_t chunk_count) {
    for (size_t i = 0; i < chunk_count; i++) {
        if (!chunks[i].data_is_str) {
            free(chunks[i].data_uint);
        }
    }
 
    free(chunks);
}
 
Layer* unpack_layers(json_t* layers) {
    if (!json_is_array(layers)) {
        logmsg(TMJ_LOG_ERR, "Could not unpack layer, 'layers' must be an array");
 
        return NULL;
    }
 
    size_t layer_count = json_array_size(layers);
 
    if (layer_count < 1) {
        logmsg(TMJ_LOG_ERR, "Unable to load layers, 'layers' array must have at least one element");
 
        return NULL;
    }
 
    Layer* ret = calloc(layer_count, sizeof(Layer));
 
    if (ret == NULL) {
        logmsg(TMJ_LOG_ERR, "Unable to load layers, the system is out of memory");
 
        return NULL;
    }
 
    size_t idx;
    json_t* layer;
    json_error_t error;
 
    json_array_foreach(layers, idx, layer) {
        // Unpack id so we can log errors with it
        int unpk = json_unpack_ex(layer, &error, 0, "{s:i}", "id", &ret[idx].id);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Could not unpack layer ID, %s at line %d column %d", error.text, error.line, error.column);
        }
 
        logmsg(TMJ_LOG_DEBUG, "Loading layer[%d]", ret[idx].id);
 
        // Unpack type
        unpk = json_unpack_ex(layer, &error, 0, "{s:s}", "type", &ret[idx].type);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Could not unpack layer[%d], %s at line %d column %d", ret[idx].id, error.text, error.line, error.column);
 
            goto fail_layer;
        }
 
        // Unpack scalar values
        unpk = json_unpack_ex(layer,
                &error,
                0,
                "{"
                "s?b, s:b,"
                "s?s, s:s, s?s,"
                "s?i, s?i, s:i, s:i,"
                "s?F, s?F, s:F, s?F, s?F"
                "}",
                "locked",
                &ret[idx].locked,
                "visible",
                &ret[idx].visible,
                "class",
                &ret[idx].class,
                "name",
                &ret[idx].name,
                "tintcolor",
                &ret[idx].tintcolor,
                "startx",
                &ret[idx].startx,
                "starty",
                &ret[idx].starty,
                "x",
                &ret[idx].x,
                "y",
                &ret[idx].y,
                "offsetx",
                &ret[idx].offsetx,
                "offsety",
                &ret[idx].offsety,
                "opacity",
                &ret[idx].opacity,
                "parallaxx",
                &ret[idx].parallaxx,
                "parallaxy",
                &ret[idx].parallaxy);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Could not unpack layer[%d], %s at line %d column %d", ret[idx].id, error.text, error.line, error.column);
 
            goto fail_layer;
        }
 
        // Unpack conditional scalar values
        if (strcmp(ret[idx].type, "imagelayer") == 0) {
            unpk = json_unpack_ex(layer,
                    &error,
                    0,
                    "{"
                    "s:i, s:i,"
                    "s:b, s:b,"
                    "s:s, s?s"
                    "}",
                    "imageheight",
                    &ret[idx].imageheight,
                    "imagewidth",
                    &ret[idx].imagewidth,
                    "repeatx",
                    &ret[idx].repeatx,
                    "repeaty",
                    &ret[idx].repeaty,
                    "image",
                    &ret[idx].image,
                    "transparentcolor",
                    &ret[idx].transparentcolor);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Could not unpack layer[%d], %s at line %d column %d", ret[idx].id, error.text, error.line, error.column);
 
                goto fail_layer;
            }
        } else if (strcmp(ret[idx].type, "tilelayer") == 0) {
            unpk = json_unpack_ex(layer,
                    &error,
                    0,
                    "{"
                    "s?s, s?s,"
                    "s:i, s:i,"
                    "}",
                    "compression",
                    &ret[idx].compression,
                    "encoding",
                    &ret[idx].encoding,
                    "height",
                    &ret[idx].height,
                    "width",
                    &ret[idx].width);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Could not unpack layer[%d], %s at line %d column %d", ret[idx].id, error.text, error.line, error.column);
 
                goto fail_layer;
            }
        } else if (strcmp(ret[idx].type, "objectgroup") == 0) {
            unpk = json_unpack_ex(layer, &error, 0, "{s?s}", "draworder", &ret[idx].draworder);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Could not unpack layer[%d], %s at line %d column %d", ret[idx].id, error.text, error.line, error.column);
 
                goto fail_layer;
            }
        }
 
        // If a tilelayer, make sure we have one of the "data" or "chunks" fields
        if (strcmp(ret[idx].type, "tilelayer") == 0) {
            if (!json_object_get(layer, "data") && !json_object_get(layer, "chunks")) {
                logmsg(TMJ_LOG_ERR, "Could not unpack layer[%d], missing 'data' and 'chunks' fields", ret[idx].id);
 
                goto fail_layer;
            }
        }
 
        // Unpack data
        if (strcmp(ret[idx].type, "tilelayer") == 0 && json_object_get(layer, "data")) {
            json_t* data = NULL;
 
            unpk = json_unpack_ex(layer, &error, 0, "{s:o}", "data", &data);
 
            if (unpk == -1) {
                logmsg(TMJ_LOG_ERR, "Could not unpack layer[%d], %s at line %d column %d", ret[idx].id, error.text, error.line, error.column);
 
                goto fail_layer;
            }
 
            if (json_is_string(data)) {
                ret[idx].data_is_str = true;
 
                unpk = json_unpack_ex(layer, &error, 0, "{s:s}", "data", &ret[idx].data_str);
 
                if (unpk == -1) {
                    logmsg(TMJ_LOG_ERR, "Could not unpack layer[%d], %s at line %d column %d", ret[idx].id, error.text, error.line, error.column);
 
                    goto fail_layer;
                }
            } else if (json_is_array(data)) {
                ret[idx].data_is_str = false;
 
                ret[idx].data_count = json_array_size(data);
 
                ret[idx].data_uint = calloc(ret[idx].data_count, sizeof(unsigned int));
 
                if (ret[idx].data_uint == NULL) {
                    logmsg(TMJ_LOG_ERR, "Unable to unpack layer[%d]->data, the system is out of memory", ret[idx].id);
 
                    goto fail_layer;
                }
 
                json_t* datum;
 
                size_t idx2;
 
                json_array_foreach(data, idx2, datum) {
                    unpk = json_unpack_ex(datum, &error, 0, "i", &ret[idx].data_uint[idx2]);
 
                    if (unpk == -1) {
                        goto fail_data;
                    }
                }
            } else {
                logmsg(TMJ_LOG_ERR, "Unable to unpack layer[%d]->data, data must be a string or an array", ret[idx].id);
 
                goto fail_layer;
            }
        }
 
        // Unpack properties
        json_t* properties = NULL;
 
        unpk = json_unpack_ex(layer, &error, 0, "{s?o}", "properties", &properties);
 
        if (unpk == -1) {
            goto fail_data;
        }
 
        if (properties != NULL) {
            ret[idx].properties = unpack_properties(properties);
 
            if (ret[idx].properties == NULL) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack layer[%d]->properties", ret[idx].id);
 
                goto fail_data;
            }
        }
 
        // Unpack chunks
        if (strcmp(ret[idx].type, "tilelayer") == 0) {
            json_t* chunks = NULL;
 
            unpk = json_unpack_ex(layer, &error, 0, "{s?o}", "chunks", &chunks);
 
            if (unpk == -1) {
                goto fail_properties;
            }
 
            if (chunks != NULL) {
                ret[idx].chunks = unpack_chunks(chunks, &ret[idx].chunk_count);
 
                if (ret[idx].chunks == NULL) {
                    logmsg(TMJ_LOG_ERR, "Unable to unpack layer[%d]->chunks", ret[idx].id);
 
                    goto fail_properties;
                }
            }
        }
 
        // Unpack objects
        if (strcmp(ret[idx].type, "objectgroup") == 0) {
            json_t* objects = NULL;
 
            unpk = json_unpack_ex(layer, &error, 0, "{s:o}", "objects", &objects);
 
            if (unpk == -1) {
                goto fail_chunks;
            }
 
            if (objects != NULL) {
                ret[idx].objects = unpack_objects(objects);
 
                if (ret[idx].objects == NULL) {
                    logmsg(TMJ_LOG_ERR, "Unable to unpack layer[%d]->objects", ret[idx].id);
 
                    goto fail_chunks;
                }
 
                ret[idx].object_count = json_array_size(objects);
            }
        }
 
        // Unpack nested layers
        if (strcmp(ret[idx].type, "group") == 0) {
            json_t* nested_layers = NULL;
 
            unpk = json_unpack_ex(layer, &error, 0, "{s:o}", "layers", &nested_layers);
 
            if (unpk == -1) {
                goto fail_objects;
            }
 
            if (json_is_array(nested_layers) && json_array_size(nested_layers) > 0) {
                ret[idx].layers = unpack_layers(nested_layers);
 
                if (ret[idx].layers == NULL) {
                    logmsg(TMJ_LOG_ERR, "Unable to unpack layer[%d]->layers", ret[idx].id);
 
                    goto fail_objects;
                }
            }
        }
    }
 
    return ret;
 
fail_objects:
    for (size_t i = 0; i < layer_count; i++) {
        free_objects(ret[i].objects, ret[i].object_count);
    }
fail_chunks:
    for (size_t i = 0; i < layer_count; i++) {
        free_chunks(ret[i].chunks, ret[i].chunk_count);
    }
 
fail_properties:
    for (size_t i = 0; i < layer_count; i++) {
        free(ret[i].properties);
    }
 
fail_data:
    for (size_t i = 0; i < layer_count; i++) {
        if (!ret[i].data_is_str) {
            free(ret[i].data_uint);
        }
    }
 
fail_layer:
    free(ret);
 
    return NULL;
}
 
void layers_free(Layer* layers, size_t layer_count) {
    for (size_t i = 0; i < layer_count; i++) {
        free_objects(layers[i].objects, layers[i].object_count);
        free_chunks(layers[i].chunks, layers[i].chunk_count);
        free(layers[i].properties);
        if (!layers[i].data_is_str) {
            free(layers[i].data_uint);
        }
 
        layers_free(layers[i].layers, layers[i].layer_count);
    }
 
    free(layers);
}
 
Map* map_load_json(json_t* root, const char* path) {
    json_error_t error;
 
    Map* map = calloc(1, sizeof(Map));
 
    if (map == NULL) {
        logmsg(TMJ_LOG_ERR, "Could not load map '%s', the system is out of memory", path);
 
        goto fail_map;
    }
 
    map->root = root;
 
    // Verify type (i.e, check that this is a map and not a tileset or something)
    int unpk = json_unpack_ex(root, &error, 0, "{s:s}", "type", &map->type);
 
    if (unpk == -1) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack map[%s]->type, %s at line %d, column %d", path, error.text, error.line, error.column);
 
        goto fail_map;
    }
 
    if (strcmp(map->type, "map") != 0) {
        logmsg(TMJ_LOG_ERR, "File at path '%s' is of type '%s' and is not a map file", path, map->type);
 
        goto fail_map;
    }
 
    json_t* tilesets = NULL;
    json_t* layers = NULL;
    json_t* properties = NULL;
 
    // Unpack scalar values
    unpk = json_unpack_ex(root,
            &error,
            0,
            "{"
            "s:b,"
            "s?s, s?s, s:s, s:s, s:s, s:s,"
            "s:i, s:i, s:i, s:i, s:i, s:i, s:i,"
            "s?F, s?F,"
            "s:o, s:o, s?o"
            "}",
            "infinite",
            &map->infinite,
            "backgroundcolor",
            &map->backgroundcolor,
            "class",
            &map->class,
            "orientation",
            &map->orientation,
            "renderorder",
            &map->renderorder,
            "tiledversion",
            &map->tiledversion,
            "version",
            &map->version,
            "compressionlevel",
            &map->compressionlevel,
            "height",
            &map->height,
            "nextlayerid",
            &map->nextlayerid,
            "nextobjectid",
            &map->nextobjectid,
            "tileheight",
            &map->tileheight,
            "tilewidth",
            &map->tilewidth,
            "width",
            &map->width,
            "parallaxoriginx",
            &map->parallaxoriginx,
            "parallaxoriginy",
            &map->parallaxoriginy,
            "tilesets",
            &tilesets,
            "layers",
            &layers,
            "properties",
            &properties);
 
    if (unpk == -1) {
        logmsg(TMJ_LOG_ERR, "Could not unpack map[%s], %s at line %d, column %d", path, error.text, error.line, error.column);
 
        goto fail_map;
    }
 
    // Unpack conditional scalar values
    if (strcmp(map->orientation, "staggered") == 0 || strcmp(map->orientation, "hexagonal") == 0) {
        unpk = json_unpack_ex(root, &error, 0, "{s:s, s:s}", "staggeraxis", &map->staggeraxis, "staggerindex", &map->staggerindex);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Could not unpack map[%s], %s at line %d, column %d", path, error.text, error.line, error.column);
 
            goto fail_map;
        }
    }
 
    if (strcmp(map->orientation, "hexagonal") == 0) {
        unpk = json_unpack_ex(root, &error, 0, "{s:i}", "hexsidelength", &map->hexsidelength);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Unable to unpack map[%s], %s at line %d, column %d", path, error.text, error.line, error.column);
 
            goto fail_map;
        }
    }
 
    // Unpack properties
    if (properties != NULL) {
        map->properties = unpack_properties(properties);
 
        if (map->properties == NULL) {
            logmsg(TMJ_LOG_ERR, "Unable to unpack map[%s]->properties", path);
 
            goto fail_map;
        }
    }
 
    // Unpack layers
    map->layers = unpack_layers(layers);
 
    if (map->layers == NULL) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack map[%s]->layers", path);
 
        goto fail_properties;
    }
 
    map->layer_count = json_array_size(layers);
 
    // Unpack tilesets
    if (!json_is_array(tilesets)) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack map[%s]->tilesets, tilesets must be an array of Tilesets", path);
 
        goto fail_layers;
    }
 
    size_t tileset_count = json_array_size(tilesets);
 
    map->tilesets = calloc(tileset_count, sizeof(Tileset));
 
    if (map->tilesets == NULL) {
        logmsg(TMJ_LOG_ERR, "Unable to unpack map[%s]->tilesets, the system is out of memory", path);
 
        goto fail_layers;
    }
 
    size_t idx;
    json_t* tileset = NULL;
 
    json_array_foreach(tilesets, idx, tileset) {
        char* source = NULL;
        int firstgid = 0;
 
        unpk = json_unpack_ex(tileset, &error, 0, "{s?s, s?i}", "source", &source, "firstgid", &firstgid);
 
        if (unpk == -1) {
            logmsg(TMJ_LOG_ERR, "Unable to unpack map[%s]->tilesets, %s at line %d column %d", path, error.text, error.line, error.column);
 
            free(map->tilesets);
 
            goto fail_layers;
        }
 
        // The tileset is not included in the map object, save the firstgid and source
        if (source) {
            map->tilesets[idx].firstgid = firstgid;
            map->tilesets[idx].source = source;
        }
        // The tileset is embedded in the map, unpack it
        else {
            if (unpack_tileset(tileset, &map->tilesets[idx]) != 0) {
                logmsg(TMJ_LOG_ERR, "Unable to unpack map[%s]->tilesets, could not unpack embedded tileset", path);
 
                goto fail_tilesets;
            }
        }
 
        map->tileset_count = tileset_count;
    }
 
    return map;
 
fail_tilesets:
    tilesets_free(map->tilesets, map->tileset_count);
 
fail_layers:
    layers_free(map->layers, map->layer_count);
 
fail_properties:
    free(map->properties);
 
fail_map:
    json_decref(root);
 
    free(map);
 
    return NULL;
}
 
Map* tmj_map_loadf(const char* path, bool check_extension) {
    char* ext = strrchr(path, '.');
 
    if (check_extension) {
        if (ext == NULL) {
            logmsg(TMJ_LOG_ERR, "Map filename '%s' has no extension", path);
 
            return NULL;
        }
 
        if (strcmp(ext, ".tmj") != 0 && strcmp(ext, ".json") != 0) {
            logmsg(TMJ_LOG_ERR, "Map filename '%s' has unknown extension, '%s'", path, ext);
            logmsg(TMJ_LOG_ERR, "Map filename '%s' must have '.tmj' or '.json' extension to be loaded", path);
 
            return NULL;
        }
    }
 
    logmsg(TMJ_LOG_DEBUG, "Loading JSON map file %s", path);
 
    json_error_t error;
    json_t* root = json_load_file(path, JSON_REJECT_DUPLICATES, &error);
 
    if (root == NULL) {
        logmsg(TMJ_LOG_ERR, "Could not load map %s, %s at line %d column %d", path, error.text, error.line, error.column);
 
        return NULL;
    }
 
    return map_load_json(root, path);
}
 
Map* tmj_map_load(const char* map, const char* name) {
    json_error_t error;
 
    json_t* root = json_loads(map, JSON_REJECT_DUPLICATES, &error);
 
    if (root == NULL) {
        logmsg(TMJ_LOG_ERR, "Could not load map %s, %s at line %d column %d", name, error.text, error.line, error.column);
 
        return NULL;
    }
 
    return map_load_json(root, name);
}
 
void tmj_map_free(Map* map) {
    if (!map) {
        return;
    }
 
    tilesets_free(map->tilesets, map->tileset_count);
    layers_free(map->layers, map->layer_count);
    free(map->properties);
 
    json_decref(map->root);
 
    free(map);
}