Misc. comment typos

Found via `codespell -q 3`

stb.h

@@ -3092,13 +3092,13 @@ typedef struct
 // (internal) change the allocated length of the array
 #define stb_arr__grow(a,n)     (stb_arr_check(a), stb_arrhead(a)->len += (n))
 
-// add N new unitialized elements to the end of the array
+// add N new uninitialized elements to the end of the array
 #define stb_arr__addn(a,n)     /*lint --e(826)*/ \
                                ((stb_arr_len(a)+(n) > stb_arrcurmax(a))      \
                                  ? (stb__arr_addlen((void **) &(a),sizeof(*a),(n)),0) \
                                  : ((stb_arr__grow(a,n), 0)))
 
-// add N new unitialized elements to the end of the array, and return
+// add N new uninitialized elements to the end of the array, and return
 // a pointer to the first new one
 #define stb_arr_addn(a,n)      (stb_arr__addn((a),n),(a)+stb_arr_len(a)-(n))
 
@@ -8620,7 +8620,7 @@ static void STB_(FUNCNAME,_ins_sort)(TYPE *p, int n)                          \
                                                                               \
 static void STB_(FUNCNAME,_quicksort)(TYPE *p, int n)                         \
 {                                                                             \
-   /* threshhold for transitioning to insertion sort */                       \
+   /* threshold for transitioning to insertion sort */                       \
    while (n > 12) {                                                           \
       TYPE *a,*b,t;                                                           \
       int c01,c12,c,m,i,j;                                                    \
@@ -13801,7 +13801,7 @@ static void stu__pop_func_comp(void)
 
 // if an id is a reference to an outer lexical scope, this
 // function returns the "name" of it, and updates the stack
-// structures to make sure the names are propogated in.
+// structures to make sure the names are propagated in.
 static int stu__nonlocal_id(stua_obj var_obj)
 {
    stua_obj dummy, var = var_obj;
@@ -13816,7 +13816,7 @@ static int stu__nonlocal_id(stua_obj var_obj)
    for (i=0; i < stb_arr_len(stu__pfunc.non_local_refs); ++i)
       if (stu__pfunc.non_local_refs[i] == j) return j-n;
    stb_arr_push(stu__pfunc.non_local_refs, j-n);
-   // now make sure all the parents propogate it down
+   // now make sure all the parents propagate it down
    for (k=n-1; k > 1; --k) {
       if (j-k >= 0) return j-n; // comes direct from this parent
       for(i=0; i < stb_arr_len(func_stack[k].non_local_refs); ++i)

stb_dxt.h

@@ -190,7 +190,7 @@ static void stb__DitherBlock(unsigned char *dest, unsigned char *block)
   int err[8],*ep1 = err,*ep2 = err+4, *et;
   int ch,y;
 
-  // process channels seperately
+  // process channels separately
   for (ch=0; ch<3; ++ch) {
       unsigned char *bp = block+ch, *dp = dest+ch;
       unsigned char *quant = (ch == 1) ? stb__QuantGTab+8 : stb__QuantRBTab+8;

stb_image.h

@@ -5789,7 +5789,7 @@ static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req
       //     Else if n is 128, noop.
       // Endloop
 
-      // The RLE-compressed data is preceeded by a 2-byte data count for each row in the data,
+      // The RLE-compressed data is preceded by a 2-byte data count for each row in the data,
       // which we're going to just skip.
       stbi__skip(s, h * channelCount * 2 );
 
@@ -6352,9 +6352,9 @@ static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, i
       g->history = (stbi_uc *) stbi__malloc(g->w * g->h); 
       if (g->out == 0)                      return stbi__errpuc("outofmem", "Out of memory");
 
-      // image is treated as "tranparent" at the start - ie, nothing overwrites the current background; 
+      // image is treated as "transparent" at the start - ie, nothing overwrites the current background; 
       // background colour is only used for pixels that are not rendered first frame, after that "background"
-      // color refers to teh color that was there the previous frame. 
+      // color refers to the color that was there the previous frame. 
       memset( g->out, 0x00, 4 * g->w * g->h ); 
       memset( g->background, 0x00, 4 * g->w * g->h ); // state of the background (starts transparent)
       memset( g->history, 0x00, g->w * g->h );        // pixels that were affected previous frame

stb_sprintf.h

@@ -666,7 +666,7 @@ STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(vsprintfcb)(STBSP_SPRINTFCB *callback,
                --pr; // when using %e, there is one digit before the decimal
             goto doexpfromg;
          }
-         // this is the insane action to get the pr to match %g sematics for %f
+         // this is the insane action to get the pr to match %g semantics for %f
          if (dp > 0) {
             pr = (dp < (stbsp__int32)l) ? l - dp : 0;
          } else {

stb_textedit.h

@@ -688,7 +688,7 @@ static void stb_textedit_prep_selection_at_cursor(STB_TexteditState *state)
 static int stb_textedit_cut(STB_TEXTEDIT_STRING *str, STB_TexteditState *state)
 {
    if (STB_TEXT_HAS_SELECTION(state)) {
-      stb_textedit_delete_selection(str,state); // implicity clamps
+      stb_textedit_delete_selection(str,state); // implicitly clamps
       state->has_preferred_x = 0;
       return 1;
    }
@@ -740,7 +740,7 @@ retry:
                   state->has_preferred_x = 0;
                }
             } else {
-               stb_textedit_delete_selection(str,state); // implicity clamps
+               stb_textedit_delete_selection(str,state); // implicitly clamps
                if (STB_TEXTEDIT_INSERTCHARS(str, state->cursor, &ch, 1)) {
                   stb_text_makeundo_insert(state, state->cursor, 1);
                   ++state->cursor;

stb_tilemap_editor.h

@@ -251,7 +251,7 @@
 //
 //   The following symbols set static limits which determine how much
 //   memory will be allocated for the editor. You can override them
-//   by making similiar definitions, but memory usage will increase.
+//   by making similar definitions, but memory usage will increase.
 //
 //      #define STBTE_MAX_TILEMAP_X      200   // max 4096
 //      #define STBTE_MAX_TILEMAP_Y      200   // max 4096
@@ -2250,7 +2250,7 @@ enum
    STBTE__prop_int,
 };
 
-// id is:      [      24-bit data     : 7-bit identifer ]
+// id is:      [      24-bit data     : 7-bit identifier ]
 // map id is:  [  12-bit y : 12 bit x : 7-bit identifier ]
 
 #define STBTE__ID(n,p)     ((n) + ((p)<<7))
@@ -2878,7 +2878,7 @@ static void stbte__drag_update(stbte_tilemap *tm, int mapx, int mapy, int copy_p
             stbte__set_link(tm, mapx, mapy, -1, -1, STBTE__undo_record);
          else if (moved || (copied && written)) {
             // if we move the target, we update to point to the new target;
-            // or, if we copy the target and the source is part ofthe copy, then update to new target
+            // or, if we copy the target and the source is part of the copy, then update to new target
             int x = k->x + (stbte__ui.drag_dest_x - stbte__ui.drag_x);
             int y = k->y + (stbte__ui.drag_dest_y - stbte__ui.drag_y);
             if (!(x >= 0 && y >= 0 && x < tm->max_x && y < tm->max_y))

stb_truetype.h

@@ -75,7 +75,7 @@
 //
 // USAGE
 //
-//   Include this file in whatever places neeed to refer to it. In ONE C/C++
+//   Include this file in whatever places need to refer to it. In ONE C/C++
 //   file, write:
 //      #define STB_TRUETYPE_IMPLEMENTATION
 //   before the #include of this file. This expands out the actual
@@ -247,8 +247,8 @@
 //   Documentation & header file        520 LOC  \___ 660 LOC documentation
 //   Sample code                        140 LOC  /
 //   Truetype parsing                   620 LOC  ---- 620 LOC TrueType
-//   Software rasterization             240 LOC  \                           .
+//   Software rasterization             240 LOC  \                           
-//   Curve tesselation                  120 LOC   \__ 550 LOC Bitmap creation
+//   Curve tessellation                 120 LOC   \__ 550 LOC Bitmap creation
 //   Bitmap management                  100 LOC   /
 //   Baked bitmap interface              70 LOC  /
 //   Font name matching & access        150 LOC  ---- 150 
@@ -694,7 +694,7 @@ STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);
 // file will only define one font and it always be at offset 0, so it will
 // return '0' for index 0, and -1 for all other indices.
 
-// The following structure is defined publically so you can declare one on
+// The following structure is defined publicly so you can declare one on
 // the stack or as a global or etc, but you should treat it as opaque.
 struct stbtt_fontinfo
 {
@@ -820,7 +820,7 @@ STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, s
 // returns # of vertices and fills *vertices with the pointer to them
 //   these are expressed in "unscaled" coordinates
 //
-// The shape is a series of countours. Each one starts with
+// The shape is a series of contours. Each one starts with
 // a STBTT_moveto, then consists of a series of mixed
 // STBTT_lineto and STBTT_curveto segments. A lineto
 // draws a line from previous endpoint to its x,y; a curveto
@@ -916,7 +916,7 @@ STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float sc
 STBTT_DEF unsigned char * stbtt_GetCodepointSDF(const stbtt_fontinfo *info, float scale, int codepoint, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff);
 // These functions compute a discretized SDF field for a single character, suitable for storing
 // in a single-channel texture, sampling with bilinear filtering, and testing against
-// larger than some threshhold to produce scalable fonts.
+// larger than some threshold to produce scalable fonts.
 //        info              --  the font
 //        scale             --  controls the size of the resulting SDF bitmap, same as it would be creating a regular bitmap
 //        glyph/codepoint   --  the character to generate the SDF for
@@ -3229,7 +3229,7 @@ static void stbtt__sort_edges_ins_sort(stbtt__edge *p, int n)
 
 static void stbtt__sort_edges_quicksort(stbtt__edge *p, int n)
 {
-   /* threshhold for transitioning to insertion sort */
+   /* threshold for transitioning to insertion sort */
    while (n > 12) {
       stbtt__edge t;
       int c01,c12,c,m,i,j;
@@ -3364,7 +3364,7 @@ static void stbtt__add_point(stbtt__point *points, int n, float x, float y)
    points[n].y = y;
 }
 
-// tesselate until threshhold p is happy... @TODO warped to compensate for non-linear stretching
+// tessellate until threshold p is happy... @TODO warped to compensate for non-linear stretching
 static int stbtt__tesselate_curve(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float objspace_flatness_squared, int n)
 {
    // midpoint

stb_vorbis.c

@@ -253,7 +253,7 @@ extern stb_vorbis * stb_vorbis_open_file(FILE *f, int close_handle_on_close,
 // create an ogg vorbis decoder from an open FILE *, looking for a stream at
 // the _current_ seek point (ftell). on failure, returns NULL and sets *error.
 // note that stb_vorbis must "own" this stream; if you seek it in between
-// calls to stb_vorbis, it will become confused. Morever, if you attempt to
+// calls to stb_vorbis, it will become confused. Moreover, if you attempt to
 // perform stb_vorbis_seek_*() operations on this file, it will assume it
 // owns the _entire_ rest of the file after the start point. Use the next
 // function, stb_vorbis_open_file_section(), to limit it.
@@ -1073,7 +1073,7 @@ static int compute_codewords(Codebook *c, uint8 *len, int n, uint32 *values)
       assert(z >= 0 && z < 32);
       available[z] = 0;
       add_entry(c, bit_reverse(res), i, m++, len[i], values);
-      // propogate availability up the tree
+      // propagate availability up the tree
       if (z != len[i]) {
          assert(len[i] >= 0 && len[i] < 32);
          for (y=len[i]; y > z; --y) {
@@ -2637,7 +2637,7 @@ static void inverse_mdct(float *buffer, int n, vorb *f, int blocktype)
    // once I combined the passes.
 
    // so there's a missing 'times 2' here (for adding X to itself).
-   // this propogates through linearly to the end, where the numbers
+   // this propagates through linearly to the end, where the numbers
    // are 1/2 too small, and need to be compensated for.
 
    {
@@ -4566,7 +4566,7 @@ static int get_seek_page_info(stb_vorbis *f, ProbedPage *z)
    return 1;
 }
 
-// rarely used function to seek back to the preceeding page while finding the
+// rarely used function to seek back to the preceding page while finding the
 // start of a packet
 static int go_to_page_before(stb_vorbis *f, unsigned int limit_offset)
 {

stb_voxel_render.h

@@ -276,7 +276,7 @@ extern "C" {
 //        NOT IMPLEMENTED! Define HLSL shaders instead of GLSL shaders
 //
 //    STBVOX_CONFIG_PREFER_TEXBUFFER
-//        Stores many of the uniform arrays in texture buffers intead,
+//        Stores many of the uniform arrays in texture buffers instead,
 //        so they can be larger and may be more efficient on some hardware.
 //
 //    STBVOX_CONFIG_LIGHTING_SIMPLE
@@ -1066,7 +1066,7 @@ enum
 // split into two triangles, each with their own normal/lighting.
 // (Note that since all output from stb_voxel_render is quad meshes,
 // triangles are actually rendered as degenerate quads.) In this case,
-// the distinction betwen STBVOX_GEOM_floor_vheight_03 and
+// the distinction between STBVOX_GEOM_floor_vheight_03 and
 // STBVOX_GEOM_floor_vheight_12 comes into play; the former introduces
 // an edge from the SW to NE corner (i.e. from <0,0,?> to <1,1,?>),
 // while the latter introduces an edge from the NW to SE corner

tests/prerelease/stb_lib.h

@@ -1250,13 +1250,13 @@ typedef struct
 // (internal) change the allocated length of the array
 #define stb_arr__grow(a,n)     (stb_arr_check(a), stb_arrhead(a)->len += (n))
 
-// add N new unitialized elements to the end of the array
+// add N new uninitialized elements to the end of the array
 #define stb_arr__addn(a,n)     /*lint --e(826)*/ \
                                ((stb_arr_len(a)+(n) > stb_arrcurmax(a))      \
                                  ? (stb__arr_addlen((void **) &(a),sizeof(*a),(n)),0) \
                                  : ((stb_arr__grow(a,n), 0)))
 
-// add N new unitialized elements to the end of the array, and return
+// add N new uninitialized elements to the end of the array, and return
 // a pointer to the first new one
 #define stb_arr_addn(a,n)      (stb_arr__addn((a),n),(a)+stb_arr_len(a)-(n))
 

tests/stb.c

@@ -1490,7 +1490,7 @@ int main(int argc, char **argv)
    }
 
    // the hardcoded compressed lengths being verified _could_
-   // change if you changed the compresser parameters; but pure
+   // change if you changed the compressor parameters; but pure
    // performance optimizations shouldn't change them
    p = stb_file("data/cantrbry.zip", &len2);
    if (p) {

tools/unicode.c

@@ -28,7 +28,7 @@
 //        the cluster. Repeat for trimmed & special-trimmed. In the first case, find
 //        previous instances of the cluster (allow don't-care to match in either
 //        direction), both aligned and mis-aligned; in the latter, starting where
-//        things start or mis-aligned. Build an index table specifiying the
+//        things start or mis-aligned. Build an index table specifying the
 //        location of each cluster (and its length). Allow an extra indirection here;
 //        the full-sized index can index a smaller table which has the actual offset
 //        (and lengths).