Use arc4random if available

.gitignore

@@ -8,6 +8,7 @@ cmake_install.cmake
 config.h
 install_manifest.txt
 mazemaker
+*.dylib
 *.tar.gz
 *.png
 *.pc

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required (VERSION 3.0)
 cmake_policy(VERSION 3.0)
-project (mazemaker VERSION 1.3)
+project (mazemaker VERSION 1.5)
 
 SET(EXEC_INSTALL_PREFIX ${CMAKE_INSTALL_PREFIX} CACHE PATH "Installation prefix for executables and object code libraries" FORCE)
 SET(INCLUDE_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/include CACHE PATH "Installation prefix for C header files" FORCE)

lib/CMakeLists.txt

@@ -1,5 +1,8 @@
 project(mazemaker_lib)
 cmake_minimum_required (VERSION 2.8.12)
+
+include(CheckSymbolExists)
+
 set (mazemaker_SOVERSION_CURRENT    0)
 set (mazemaker_SOVERSION_REVISION   2)
 set (mazemaker_SOVERSION_AGE        0)
@@ -11,6 +14,11 @@ set (mazemaker_SOVERSION ${mazemaker_SOVERSION_MAJOR}.${mazemaker_SOVERSION_MINO
 find_package(PkgConfig REQUIRED)
 pkg_search_module(PNG REQUIRED libpng)
 
+check_symbol_exists(arc4random_uniform "stdlib.h" HAVE_ARC4RANDOM)
+
+configure_file ("${CMAKE_CURRENT_SOURCE_DIR}/config.h.in"
+                "${CMAKE_CURRENT_SOURCE_DIR}/config.h" )
+
 file(GLOB SOURCES *.c *.h)
 
 add_library(mazemaker_shared SHARED ${SOURCES})
@@ -27,9 +35,7 @@ set_target_properties(mazemaker_static PROPERTIES
 )
 install (TARGETS mazemaker_shared mazemaker_static DESTINATION ${LIB_INSTALL_DIR})
 install (FILES ${CMAKE_CURRENT_SOURCE_DIR}/../include/mazemaker.h DESTINATION ${INCLUDE_INSTALL_DIR})
-target_link_libraries(mazemaker_shared PUBLIC ${PNG_LIBRARIES} m)
-target_include_directories(mazemaker_shared PUBLIC ${PNG_INCLUDE_DIRS} ../include)
-target_include_directories(mazemaker_static PUBLIC ${PNG_INCLUDE_DIRS} ../include)
-target_compile_options(mazemaker_shared PUBLIC ${PNG_CFLAGS_OTHER})
-target_compile_options(mazemaker_static PUBLIC ${PNG_CFLAGS_OTHER})
-target_link_options(mazemaker_shared PUBLIC -L${PNG_LIBDIR})
+target_link_libraries(mazemaker_shared PUBLIC ${PNG_LIBRARIES};m)
+target_link_directories(mazemaker_shared PUBLIC ${PNG_LIBRARY_DIRS})
+target_include_directories(mazemaker_shared PUBLIC ${PNG_INCLUDE_DIRS};../include)
+target_include_directories(mazemaker_static PUBLIC ${PNG_INCLUDE_DIRS};../include)

lib/config.h.in

@@ -0,0 +1 @@
+#cmakedefine HAVE_ARC4RANDOM "@HAVE_ARC4RANDOM@"

lib/grid.c

@@ -1,5 +1,6 @@
 #include <stdlib.h>
 #include "grid.h"
+#include "config.h"
 
 #define MAX_EDGE_WEIGHT 100
 #define TOP_LEFT_CORNER "\xe2\x94\x8f"
@@ -18,6 +19,14 @@
 #define HORIZONTAL_HALF_LEFT "\xe2\x95\xb8"
 #define HORIZONTAL_HALF_RIGHT "\xe2\x95\xba"
 
+static edgeweight_t random_edgeweight() {
+#ifdef HAVE_ARC4RANDOM
+    return arc4random_uniform(MAX_EDGE_WEIGHT);
+#else // HAVE_ARC4RANDOM
+    return random()%MAX_EDGE_WEIGHT;
+#endif // HAVE_ARC4RANDOM
+}
+
 mazegrid_t mazegrid_new(size_t width, size_t height) {
     mazeedges_t** grid = calloc(height, sizeof(mazeedges_t*));
     for (size_t i = 0; i < height; i++) {
@@ -66,8 +75,8 @@ edgeweight_t mazegrid_get_edge(mazegrid_t const* g, size_t x, size_t y, mazeedge
 void mazegrid_randomize(mazegrid_t* g) {
     for (size_t i = 0; i < g->height; i++) {
         for (size_t j = 0; j < g->width; j++) {
-            if (i < g->height - 1) g->grid[i][j].up = (edgeweight_t)(random()%MAX_EDGE_WEIGHT);
-            if (j < g->width - 1) g->grid[i][j].right = (edgeweight_t)(random()%MAX_EDGE_WEIGHT);
+            if (i < g->height - 1) g->grid[i][j].up = random_edgeweight();
+            if (j < g->width - 1) g->grid[i][j].right = random_edgeweight();
         }
     }
 }

lib/options.c

@@ -18,15 +18,40 @@ void mazemaker_options_free(mazeoptions_t* options) {
     free(options);
 }
 
+static int interpretColorName(char const* color_desc, rgb_color_t dst) {
+    if (0 == strcasecmp(color_desc, "black")) { dst[0] = dst[1] = dst[2] = 0; }
+    else if (0 == strcasecmp(color_desc, "white")) { dst[0] = dst[1] = dst[2] = 0xff; }
+    else if (0 == strcasecmp(color_desc, "red")) { dst[0] = 0xff; dst[1] = dst[2] = 0; }
+    else if (0 == strcasecmp(color_desc, "blue")) { dst[0] = dst[1] = 0; dst[2] = 0xff; }
+    else if (0 == strcasecmp(color_desc, "green")) { dst[0] = dst[2] = 0; dst[1] = 0xff; }
+    else if (0 == strcasecmp(color_desc, "yellow")) { dst[2] = 0; dst[0] = dst[1] = 0xff; }
+    else if ((0 == strcasecmp(color_desc, "magenta")) ||
+             (0 == strcasecmp(color_desc, "purple"))) { dst[1] = 0; dst[0] = dst[2] = 0xff; }
+    else if (0 == strcasecmp(color_desc, "cyan")) { dst[0] = 0; dst[1] = dst[2] = 0xff; }
+    else if (0 == strcasecmp(color_desc, "orange")) { dst[0] = 0xff; dst[1] = 0x7f; dst[2] = 0; }
+    else if (0 == strcasecmp(color_desc, "brown")) { dst[0] = 0x7f; dst[1] = 0x3f; dst[2] = 0; }
+    else if ((0 == strcasecmp(color_desc, "gray")) ||
+             (0 == strcasecmp(color_desc, "grey"))) { dst[0] = dst[1] = dst[2] = 0x7f; }
+    else if (0 == strcasecmp(color_desc, "darkblue")) { dst[0] = dst[1] = 0; dst[2] = 0x7f; }
+    else if (0 == strcasecmp(color_desc, "darkgreen")) { dst[0] = dst[2] = 0; dst[1] = 0x7f; }
+    else if (0 == strcasecmp(color_desc, "darkred")) { dst[0] = 0x7f; dst[1] = dst[2] = 0; }
+    else if (0 == strcasecmp(color_desc, "pink")) { dst[0] = 0xff; dst[1] = 0xa0; dst[2] = 0xbf; }
+    else if ((0 == strcasecmp(color_desc, "darkmagenta")) ||
+             (0 == strcasecmp(color_desc, "darkpurple"))) { dst[1] = 0; dst[0] = dst[2] = 0x7f; }
+    else if (0 == strcasecmp(color_desc, "darkcyan")) { dst[0] = 0; dst[1] = dst[2] = 0x7f; }
+    else return -1;
+    return 0;
+}
+
 static int stringToColor(char const* color_desc, rgb_color_t dst) {
-    if (color_desc[0] != '#') return -1; // bad format
+    if (color_desc[0] != '#') return interpretColorName(color_desc, dst); 
 
     size_t l;
     for (l = 1; color_desc[l] != '\0'; l++) if (!isxdigit(color_desc[l])) return -1; // bad format
 
     if ((l != 4) && (l != 7)) return -1; // bad format
 
-    char x2[3] = { 0, 0, 0};
+    char x2[3] = { 0, 0, 0 };
     if (l == 4) {
         x2[0] = x2[1] = color_desc[1];
         sscanf(x2, "%hhx", &dst[0]);

utils/CMakeLists.txt

@@ -1,10 +1,10 @@
 find_package(PkgConfig REQUIRED)
 pkg_search_module(POPT REQUIRED popt)
 
-add_executable(mazemaker)
-target_sources(mazemaker PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/mazemaker.c)
-target_link_libraries(mazemaker PUBLIC mazemaker_shared ${POPT_LIBRARIES})
-target_include_directories(mazemaker PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../include PUBLIC ${POPT_INCLUDE_DIRS})
-target_compile_options(mazemaker PUBLIC ${POPT_CFLAGS_OTHER})
+include_directories("../include" ${POPT_INCLUDE_DIRS})
+
+add_executable(mazemaker mazemaker.c)
+target_link_directories(mazemaker PUBLIC ${POPT_LIBRARY_DIRS})
+target_link_libraries(mazemaker mazemaker_shared ${POPT_LIBRARIES})
 
 install (TARGETS mazemaker DESTINATION bin)

utils/mazemaker.c

@@ -41,8 +41,18 @@ int main(int argc, char* argv[]) {
     }
     mazegrid_t maze;
     mazeoptions_t* options = mazemaker_options_new();
-    if (fg_color != NULL) mazemaker_options_set_wall_color(options, fg_color);
-    if (bg_color != NULL) mazemaker_options_set_background_color(options, bg_color);
+    if (fg_color != NULL) {
+        if (0 > mazemaker_options_set_wall_color(options, fg_color)) {
+            fprintf(stderr, "Unknown color: \"%s\"\n", fg_color);
+            exit(1);
+        }
+    }
+    if (bg_color != NULL) {
+        if (0 > mazemaker_options_set_background_color(options, bg_color)) {
+            fprintf(stderr, "Unknown color: \"%s\"\n", bg_color);
+            exit(1);
+        }
+    }
     mazemaker_generate_maze(width, height, &maze);
     mazemaker_maze_to_png_opt(&maze, filename, options);
     mazemaker_free_maze(&maze);