Build all demos as C89

Author: ccawley2011

demo/allegro5/Makefile

@@ -2,7 +2,7 @@
 BIN = demo
 
 # Flags
-CFLAGS += -std=c99 -pedantic -O2
+CFLAGS += -std=c89 -pedantic -O2
 
 SRC = main.c
 OBJ = $(SRC:.c=.o)

demo/allegro5/main.c

@@ -56,6 +56,8 @@ int main(void)
     /* Platform */
     ALLEGRO_DISPLAY *display = NULL;
     ALLEGRO_EVENT_QUEUE *event_queue = NULL;
+    NkAllegro5Font *font;
+    struct nk_context *ctx;
 
     if (!al_init()) {
         fprintf(stdout, "failed to initialize allegro5!\n");
@@ -86,9 +88,7 @@ int main(void)
     al_register_event_source(event_queue, al_get_mouse_event_source());
     al_register_event_source(event_queue, al_get_keyboard_event_source());
 
-    NkAllegro5Font *font;
     font = nk_allegro5_font_create_from_file("../../../extra_font/Roboto-Regular.ttf", 12, 0);
-    struct nk_context *ctx;
 
     ctx = nk_allegro5_init(font, display, WINDOW_WIDTH, WINDOW_HEIGHT);
 

demo/allegro5/nuklear_allegro5.h

@@ -68,6 +68,7 @@ static struct nk_allegro5 {
 NK_API NkAllegro5Font*
 nk_allegro5_font_create_from_file(const char *file_name, int font_size, int flags)
 {
+    NkAllegro5Font *font;
     if (!al_init_image_addon()) {
         fprintf(stdout, "Unable to initialize required allegro5 image addon\n");
         exit(1);
@@ -80,7 +81,7 @@ nk_allegro5_font_create_from_file(const char *file_name, int font_size, int flag
         fprintf(stdout, "Unable to initialize required allegro5 TTF font addon\n");
         exit(1);
     }
-    NkAllegro5Font *font = (NkAllegro5Font*)calloc(1, sizeof(NkAllegro5Font));
+    font = (NkAllegro5Font*)calloc(1, sizeof(NkAllegro5Font));
 
     font->font = al_load_font(file_name, font_size, flags);
     if (font->font == NULL) {
@@ -94,6 +95,8 @@ nk_allegro5_font_create_from_file(const char *file_name, int font_size, int flag
 static float
 nk_allegro5_font_get_text_width(nk_handle handle, float height, const char *text, int len)
 {
+    float width;
+    char *strcpy;
     NkAllegro5Font *font = (NkAllegro5Font*)handle.ptr;
     if (!font || !text) {
         return 0;
@@ -102,10 +105,12 @@ nk_allegro5_font_get_text_width(nk_handle handle, float height, const char *text
        as nuklear uses variable size buffers and al_get_text_width doesn't
        accept a length, it infers length from null-termination
        (which is unsafe API design by allegro devs!) */
-    char strcpy[len+1];
-    strncpy((char*)&strcpy, text, len);
+    strcpy = malloc(len + 1);
+    strncpy(strcpy, text, len);
     strcpy[len] = '\0';
-    return al_get_text_width(font->font, strcpy);
+    width = al_get_text_width(font->font, strcpy);
+    free(strcpy);
+    return width;
 }
 
 NK_API void
@@ -170,18 +175,18 @@ nk_allegro5_render()
                 (float)r->rounding, color);
         } break;
         case NK_COMMAND_CIRCLE: {
+            float xr, yr;
             const struct nk_command_circle *c = (const struct nk_command_circle *)cmd;
             color = nk_color_to_allegro_color(c->color);
-            float xr, yr;
             xr = (float)c->w/2;
             yr = (float)c->h/2;
             al_draw_ellipse(((float)(c->x)) + xr, ((float)c->y) + yr,
                 xr, yr, color, (float)c->line_thickness);
         } break;
         case NK_COMMAND_CIRCLE_FILLED: {
+            float xr, yr;
             const struct nk_command_circle_filled *c = (const struct nk_command_circle_filled *)cmd;
             color = nk_color_to_allegro_color(c->color);
-            float xr, yr;
             xr = (float)c->w/2;
             yr = (float)c->h/2;
             al_draw_filled_ellipse(((float)(c->x)) + xr, ((float)c->y) + yr,
@@ -200,54 +205,61 @@ nk_allegro5_render()
                 (float)t->b.y, (float)t->c.x, (float)t->c.y, color);
         } break;
         case NK_COMMAND_POLYGON: {
+            int i;
+            float *vertices;
             const struct nk_command_polygon *p = (const struct nk_command_polygon*)cmd;
+            vertices = calloc(p->point_count * 2, sizeof(float));
             color = nk_color_to_allegro_color(p->color);
-            int i;
-            float vertices[p->point_count * 2];
             for (i = 0; i < p->point_count; i++) {
                 vertices[i*2] = p->points[i].x;
                 vertices[(i*2) + 1] = p->points[i].y;
             }
             al_draw_polyline((const float*)&vertices, (2 * sizeof(float)),
                 (int)p->point_count, ALLEGRO_LINE_JOIN_ROUND, ALLEGRO_LINE_CAP_CLOSED,
                 color, (float)p->line_thickness, 0.0);
+            free(vertices);
         } break;
         case NK_COMMAND_POLYGON_FILLED: {
+            int i;
+            float *vertices;
             const struct nk_command_polygon_filled *p = (const struct nk_command_polygon_filled *)cmd;
+            vertices = calloc(p->point_count * 2, sizeof(float));
             color = nk_color_to_allegro_color(p->color);
-            int i;
-            float vertices[p->point_count * 2];
             for (i = 0; i < p->point_count; i++) {
                 vertices[i*2] = p->points[i].x;
                 vertices[(i*2) + 1] = p->points[i].y;
             }
             al_draw_filled_polygon((const float*)&vertices, (int)p->point_count, color);
+            free(vertices);
         } break;
         case NK_COMMAND_POLYLINE: {
+            int i;
+            float *vertices;
             const struct nk_command_polyline *p = (const struct nk_command_polyline *)cmd;
+            vertices = calloc(p->point_count * 2, sizeof(float));
             color = nk_color_to_allegro_color(p->color);
-            int i;
-            float vertices[p->point_count * 2];
             for (i = 0; i < p->point_count; i++) {
                 vertices[i*2] = p->points[i].x;
                 vertices[(i*2) + 1] = p->points[i].y;
             }
             al_draw_polyline((const float*)&vertices, (2 * sizeof(float)),
                 (int)p->point_count, ALLEGRO_LINE_JOIN_ROUND, ALLEGRO_LINE_CAP_ROUND,
                 color, (float)p->line_thickness, 0.0);
+            free(vertices);
         } break;
         case NK_COMMAND_TEXT: {
+            NkAllegro5Font *font;
             const struct nk_command_text *t = (const struct nk_command_text*)cmd;
             color = nk_color_to_allegro_color(t->foreground);
-            NkAllegro5Font *font = (NkAllegro5Font*)t->font->userdata.ptr;
+            font = (NkAllegro5Font*)t->font->userdata.ptr;
             al_draw_text(font->font,
                 color, (float)t->x, (float)t->y, 0,
                 (const char*)t->string);
         } break;
         case NK_COMMAND_CURVE: {
+            float points[8];
             const struct nk_command_curve *q = (const struct nk_command_curve *)cmd;
             color = nk_color_to_allegro_color(q->color);
-            float points[8];
             points[0] = (float)q->begin.x;
             points[1] = (float)q->begin.y;
             points[2] = (float)q->ctrl[0].x;
@@ -425,12 +437,13 @@ NK_API struct nk_context*
 nk_allegro5_init(NkAllegro5Font *allegro5font, ALLEGRO_DISPLAY *dsp,
     unsigned int width, unsigned int height)
 {
+    struct nk_user_font *font;
     if (!al_init_primitives_addon()) {
         fprintf(stdout, "Unable to initialize required allegro5 primitives addon\n");
         exit(1);
     }
 
-    struct nk_user_font *font = &allegro5font->nk;
+    font = &allegro5font->nk;
     font->userdata = nk_handle_ptr(allegro5font);
     font->height = (float)allegro5font->height;
     font->width = nk_allegro5_font_get_text_width;

demo/glfw_opengl2/Makefile

@@ -2,7 +2,7 @@
 BIN = demo
 
 # Flags
-CFLAGS += -std=c99 -pedantic -O2
+CFLAGS += -std=c89 -pedantic -O2
 
 SRC = main.c
 OBJ = $(SRC:.c=.o)

demo/glfw_opengl3/Makefile

@@ -2,7 +2,7 @@
 BIN = demo
 
 # Flags
-CFLAGS += -std=c99 -pedantic -O2
+CFLAGS += -std=c89 -pedantic -O2
 
 SRC = main.c
 OBJ = $(SRC:.c=.o)

demo/glfw_opengl4/Makefile

@@ -2,7 +2,7 @@
 BIN = demo
 
 # Flags
-CFLAGS += -std=c99 -pedantic -O2
+CFLAGS += -std=c89 -pedantic -O2
 
 SRC = main.c
 OBJ = $(SRC:.c=.o)

demo/glfw_opengl4/nuklear_glfw_gl4.h

@@ -116,6 +116,7 @@ NK_API void
 nk_glfw3_device_create()
 {
     GLint status;
+    GLint len = 0;
     static const GLchar *vertex_shader =
         NK_SHADER_VERSION
         NK_SHADER_BINDLESS
@@ -156,7 +157,6 @@ nk_glfw3_device_create()
     glCompileShader(dev->frag_shdr);
     glGetShaderiv(dev->vert_shdr, GL_COMPILE_STATUS, &status);
 
-    GLint len = 0;
     glGetShaderiv(dev->vert_shdr, GL_INFO_LOG_LENGTH, &len);
     if (len > 1) {
         char *log = calloc((size_t)len, sizeof(char));

demo/overview.c

@@ -199,7 +199,7 @@ overview(struct nk_context *ctx)
                 /* Basic widgets */
                 static int int_slider = 5;
                 static float float_slider = 2.5f;
-                static size_t prog_value = 40;
+                static nk_size prog_value = 40;
                 static float property_float = 2;
                 static int property_int = 10;
                 static int property_neg = 10;
@@ -226,7 +226,7 @@ overview(struct nk_context *ctx)
 
                 nk_label(ctx, "Slider float", NK_TEXT_LEFT);
                 nk_slider_float(ctx, 0, &float_slider, 5.0, 0.5f);
-                nk_labelf(ctx, NK_TEXT_LEFT, "Progressbar: %zu" , prog_value);
+                nk_labelf(ctx, NK_TEXT_LEFT, "Progressbar: %u" , (int)prog_value);
                 nk_progress(ctx, &prog_value, 100, NK_MODIFIABLE);
 
                 nk_layout_row(ctx, NK_STATIC, 25, 2, ratio);

demo/sdl_opengl2/Makefile

@@ -2,7 +2,7 @@
 BIN = demo
 
 # Flags
-CFLAGS += -std=c99 -pedantic -O2
+CFLAGS += -std=c89 -pedantic -O2
 
 SRC = main.c
 OBJ = $(SRC:.c=.o)

demo/sdl_opengl3/Makefile

@@ -2,7 +2,7 @@
 BIN = demo
 
 # Flags
-CFLAGS += -std=c99 -pedantic -O2
+CFLAGS += -std=c89 -pedantic -O2
 
 SRC = main.c
 OBJ = $(SRC:.c=.o)