Bug Summary

File:font.c
Location:line 613, column 30
Description:Dereference of null pointer (loaded from variable 'p')

Annotated Source Code

1/*
2 * font.c: Font handling for the DVB On Screen Display
3 *
4 * See the main source file 'vdr.c' for copyright information and
5 * how to reach the author.
6 *
7 * BiDi support by Osama Alrawab <alrawab@hotmail.com> @2008 Tripoli-Libya.
8 *
9 * $Id: font.c 3.2 2014/01/07 12:19:45 kls Exp $
10 */
11
12#include "font.h"
13#include <ctype.h>
14#include <fontconfig/fontconfig.h>
15#ifdef BIDI
16#include <fribidi.h>
17#endif
18#include <ft2build.h>
19#include FT_FREETYPE_H<freetype.h>
20#include "config.h"
21#include "osd.h"
22#include "tools.h"
23
24const char *DefaultFontOsd = "Sans Serif:Bold";
25const char *DefaultFontSml = "Sans Serif";
26const char *DefaultFontFix = "Courier:Bold";
27
28// --- cFreetypeFont ---------------------------------------------------------
29
30#define KERNING_UNKNOWN(-10000) (-10000)
31
32struct tKerning {
33 uint prevSym;
34 int kerning;
35 tKerning(uint PrevSym, int Kerning = 0) { prevSym = PrevSym; kerning = Kerning; }
36 };
37
38class cGlyph : public cListObject {
39private:
40 uint charCode;
41 uchar *bitmap;
42 int advanceX;
43 int advanceY;
44 int left; ///< The bitmap's left bearing expressed in integer pixels.
45 int top; ///< The bitmap's top bearing expressed in integer pixels.
46 int width; ///< The number of pixels per bitmap row.
47 int rows; ///< The number of bitmap rows.
48 int pitch; ///< The pitch's absolute value is the number of bytes taken by one bitmap row, including padding.
49 cVector<tKerning> kerningCache;
50public:
51 cGlyph(uint CharCode, FT_GlyphSlotRec_ *GlyphData);
52 virtual ~cGlyph();
53 uint CharCode(void) const { return charCode; }
54 uchar *Bitmap(void) const { return bitmap; }
55 int AdvanceX(void) const { return advanceX; }
56 int AdvanceY(void) const { return advanceY; }
57 int Left(void) const { return left; }
58 int Top(void) const { return top; }
59 int Width(void) const { return width; }
60 int Rows(void) const { return rows; }
61 int Pitch(void) const { return pitch; }
62 int GetKerningCache(uint PrevSym) const;
63 void SetKerningCache(uint PrevSym, int Kerning);
64 };
65
66cGlyph::cGlyph(uint CharCode, FT_GlyphSlotRec_ *GlyphData)
67{
68 charCode = CharCode;
69 advanceX = GlyphData->advance.x >> 6;
70 advanceY = GlyphData->advance.y >> 6;
71 left = GlyphData->bitmap_left;
72 top = GlyphData->bitmap_top;
73 width = GlyphData->bitmap.width;
74 rows = GlyphData->bitmap.rows;
75 pitch = GlyphData->bitmap.pitch;
76 bitmap = MALLOC(uchar, rows * pitch)(uchar *)malloc(sizeof(uchar) * (rows * pitch));
77 memcpy(bitmap, GlyphData->bitmap.buffer, rows * pitch);
78}
79
80cGlyph::~cGlyph()
81{
82 free(bitmap);
83}
84
85int cGlyph::GetKerningCache(uint PrevSym) const
86{
87 for (int i = kerningCache.Size(); --i > 0; ) {
88 if (kerningCache[i].prevSym == PrevSym)
89 return kerningCache[i].kerning;
90 }
91 return KERNING_UNKNOWN(-10000);
92}
93
94void cGlyph::SetKerningCache(uint PrevSym, int Kerning)
95{
96 kerningCache.Append(tKerning(PrevSym, Kerning));
97}
98
99class cFreetypeFont : public cFont {
100private:
101 cString fontName;
102 int size;
103 int height;
104 int bottom;
105 FT_Library library; ///< Handle to library
106 FT_Face face; ///< Handle to face object
107 mutable cList<cGlyph> glyphCacheMonochrome;
108 mutable cList<cGlyph> glyphCacheAntiAliased;
109 int Bottom(void) const { return bottom; }
110 int Kerning(cGlyph *Glyph, uint PrevSym) const;
111 cGlyph* Glyph(uint CharCode, bool AntiAliased = false) const;
112public:
113 cFreetypeFont(const char *Name, int CharHeight, int CharWidth = 0);
114 virtual ~cFreetypeFont();
115 virtual const char *FontName(void) const { return fontName; }
116 virtual int Size(void) const { return size; }
117 virtual int Width(uint c) const;
118 virtual int Width(const char *s) const;
119 virtual int Height(void) const { return height; }
120 virtual void DrawText(cBitmap *Bitmap, int x, int y, const char *s, tColor ColorFg, tColor ColorBg, int Width) const;
121 virtual void DrawText(cPixmap *Pixmap, int x, int y, const char *s, tColor ColorFg, tColor ColorBg, int Width) const;
122 };
123
124cFreetypeFont::cFreetypeFont(const char *Name, int CharHeight, int CharWidth)
125{
126 fontName = Name;
127 size = CharHeight;
128 height = 0;
129 bottom = 0;
130 int error = FT_Init_FreeType(&library);
131 if (!error) {
132 error = FT_New_Face(library, Name, 0, &face);
133 if (!error) {
134 if (face->num_fixed_sizes && face->available_sizes) { // fixed font
135 // TODO what exactly does all this mean?
136 height = face->available_sizes->height;
137 for (uint sym ='A'; sym < 'z'; sym++) { // search for descender for fixed font FIXME
138 FT_UInt glyph_index = FT_Get_Char_Index(face, sym);
139 error = FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT0x0);
140 if (!error) {
141 error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL);
142 if (!error) {
143 if (face->glyph->bitmap.rows-face->glyph->bitmap_top > bottom)
144 bottom = face->glyph->bitmap.rows-face->glyph->bitmap_top;
145 }
146 else
147 esyslog("ERROR: FreeType: error %d in FT_Render_Glyph", error)void( (SysLogLevel > 0) ? syslog_with_tid(3, "ERROR: FreeType: error %d in FT_Render_Glyph"
, error) : void() );
148 }
149 else
150 esyslog("ERROR: FreeType: error %d in FT_Load_Glyph", error)void( (SysLogLevel > 0) ? syslog_with_tid(3, "ERROR: FreeType: error %d in FT_Load_Glyph"
, error) : void() );
151 }
152 }
153 else {
154 error = FT_Set_Char_Size(face, // handle to face object
155 CharWidth * 64, // CharWidth in 1/64th of points
156 CharHeight * 64, // CharHeight in 1/64th of points
157 0, // horizontal device resolution
158 0); // vertical device resolution
159 if (!error) {
160 height = (face->size->metrics.ascender - face->size->metrics.descender + 63) / 64;
161 bottom = abs((face->size->metrics.descender - 63) / 64);
162 }
163 else
164 esyslog("ERROR: FreeType: error %d during FT_Set_Char_Size (font = %s)\n", error, Name)void( (SysLogLevel > 0) ? syslog_with_tid(3, "ERROR: FreeType: error %d during FT_Set_Char_Size (font = %s)\n"
, error, Name) : void() );
165 }
166 }
167 else
168 esyslog("ERROR: FreeType: load error %d (font = %s)", error, Name)void( (SysLogLevel > 0) ? syslog_with_tid(3, "ERROR: FreeType: load error %d (font = %s)"
, error, Name) : void() );
169 }
170 else
171 esyslog("ERROR: FreeType: initialization error %d (font = %s)", error, Name)void( (SysLogLevel > 0) ? syslog_with_tid(3, "ERROR: FreeType: initialization error %d (font = %s)"
, error, Name) : void() );
172}
173
174cFreetypeFont::~cFreetypeFont()
175{
176 FT_Done_Face(face);
177 FT_Done_FreeType(library);
178}
179
180int cFreetypeFont::Kerning(cGlyph *Glyph, uint PrevSym) const
181{
182 int kerning = 0;
183 if (Glyph && PrevSym) {
184 kerning = Glyph->GetKerningCache(PrevSym);
185 if (kerning == KERNING_UNKNOWN(-10000)) {
186 FT_Vector delta;
187 FT_UInt glyph_index = FT_Get_Char_Index(face, Glyph->CharCode());
188 FT_UInt glyph_index_prev = FT_Get_Char_Index(face, PrevSym);
189 FT_Get_Kerning(face, glyph_index_prev, glyph_index, FT_KERNING_DEFAULT, &delta);
190 kerning = delta.x / 64;
191 Glyph->SetKerningCache(PrevSym, kerning);
192 }
193 }
194 return kerning;
195}
196
197cGlyph* cFreetypeFont::Glyph(uint CharCode, bool AntiAliased) const
198{
199 // Non-breaking space:
200 if (CharCode == 0xA0)
201 CharCode = 0x20;
202
203 // Lookup in cache:
204 cList<cGlyph> *glyphCache = AntiAliased ? &glyphCacheAntiAliased : &glyphCacheMonochrome;
205 for (cGlyph *g = glyphCache->First(); g; g = glyphCache->Next(g)) {
206 if (g->CharCode() == CharCode)
207 return g;
208 }
209
210 FT_UInt glyph_index = FT_Get_Char_Index(face, CharCode);
211
212 // Load glyph image into the slot (erase previous one):
213 int error = FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT0x0);
214 if (error)
215 esyslog("ERROR: FreeType: error during FT_Load_Glyph")void( (SysLogLevel > 0) ? syslog_with_tid(3, "ERROR: FreeType: error during FT_Load_Glyph"
) : void() );
216 else {
217#if ((FREETYPE_MAJOR2 == 2 && FREETYPE_MINOR5 == 1 && FREETYPE_PATCH2 >= 7) || (FREETYPE_MAJOR2 == 2 && FREETYPE_MINOR5 == 2 && FREETYPE_PATCH2 <= 1))// TODO workaround for bug? which one?
218 if (AntiAliased || CharCode == 32)
219#else
220 if (AntiAliased)
221#endif
222 error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL);
223 else
224 error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_MONO);
225 if (error)
226 esyslog("ERROR: FreeType: error during FT_Render_Glyph %d, %d\n", CharCode, glyph_index)void( (SysLogLevel > 0) ? syslog_with_tid(3, "ERROR: FreeType: error during FT_Render_Glyph %d, %d\n"
, CharCode, glyph_index) : void() );
227 else { //new bitmap
228 cGlyph *Glyph = new cGlyph(CharCode, face->glyph);
229 glyphCache->Add(Glyph);
230 return Glyph;
231 }
232 }
233#define UNKNOWN_GLYPH_INDICATOR'?' '?'
234 if (CharCode != UNKNOWN_GLYPH_INDICATOR'?')
235 return Glyph(UNKNOWN_GLYPH_INDICATOR'?', AntiAliased);
236 return NULL__null;
237}
238
239int cFreetypeFont::Width(uint c) const
240{
241 cGlyph *g = Glyph(c, Setup.AntiAlias);
242 return g ? g->AdvanceX() : 0;
243}
244
245int cFreetypeFont::Width(const char *s) const
246{
247 int w = 0;
248 if (s) {
249#ifdef BIDI
250 cString bs = Bidi(s);
251 s = bs;
252#endif
253 uint prevSym = 0;
254 while (*s) {
255 int sl = Utf8CharLen(s);
256 uint sym = Utf8CharGet(s, sl);
257 s += sl;
258 cGlyph *g = Glyph(sym, Setup.AntiAlias);
259 if (g)
260 w += g->AdvanceX() + Kerning(g, prevSym);
261 prevSym = sym;
262 }
263 }
264 return w;
265}
266
267#define MAX_BLEND_LEVELS256 256
268
269void cFreetypeFont::DrawText(cBitmap *Bitmap, int x, int y, const char *s, tColor ColorFg, tColor ColorBg, int Width) const
270{
271 if (s && height) { // checking height to make sure we actually have a valid font
272#ifdef BIDI
273 cString bs = Bidi(s);
274 s = bs;
275#endif
276 bool AntiAliased = Setup.AntiAlias && Bitmap->Bpp() >= 8;
277 bool TransparentBackground = ColorBg == clrTransparent;
278 int16_t BlendLevelIndex[MAX_BLEND_LEVELS256]; // tIndex is 8 bit unsigned, so a negative value can be used to mark unused entries
279 if (AntiAliased && !TransparentBackground)
280 memset(BlendLevelIndex, 0xFF, sizeof(BlendLevelIndex)); // initializes the array with negative values
281 tIndex fg = Bitmap->Index(ColorFg);
282 uint prevSym = 0;
283 while (*s) {
284 int sl = Utf8CharLen(s);
285 uint sym = Utf8CharGet(s, sl);
286 s += sl;
287 cGlyph *g = Glyph(sym, AntiAliased);
288 if (!g)
289 continue;
290 int kerning = Kerning(g, prevSym);
291 prevSym = sym;
292 uchar *buffer = g->Bitmap();
293 int symWidth = g->Width();
294 if (Width && x + symWidth + g->Left() + kerning - 1 > Width)
295 break; // we don't draw partial characters
296 if (x + symWidth + g->Left() + kerning > 0) {
297 for (int row = 0; row < g->Rows(); row++) {
298 for (int pitch = 0; pitch < g->Pitch(); pitch++) {
299 uchar bt = *(buffer + (row * g->Pitch() + pitch));
300 if (AntiAliased) {
301 if (bt > 0x00) {
302 int px = x + pitch + g->Left() + kerning;
303 int py = y + row + (height - Bottom() - g->Top());
304 tColor bg;
305 if (bt == 0xFF)
306 bg = fg;
307 else if (TransparentBackground)
308 bg = Bitmap->Index(Bitmap->Blend(ColorFg, Bitmap->GetColor(px, py), bt));
309 else if (BlendLevelIndex[bt] >= 0)
310 bg = BlendLevelIndex[bt];
311 else
312 bg = BlendLevelIndex[bt] = Bitmap->Index(Bitmap->Blend(ColorFg, ColorBg, bt));
313 Bitmap->SetIndex(px, py, bg);
314 }
315 }
316 else { //monochrome rendering
317 for (int col = 0; col < 8 && col + pitch * 8 <= symWidth; col++) {
318 if (bt & 0x80)
319 Bitmap->SetIndex(x + col + pitch * 8 + g->Left() + kerning, y + row + (height - Bottom() - g->Top()), fg);
320 bt <<= 1;
321 }
322 }
323 }
324 }
325 }
326 x += g->AdvanceX() + kerning;
327 if (x > Bitmap->Width() - 1)
328 break;
329 }
330 }
331}
332
333void cFreetypeFont::DrawText(cPixmap *Pixmap, int x, int y, const char *s, tColor ColorFg, tColor ColorBg, int Width) const
334{
335 if (s && height) { // checking height to make sure we actually have a valid font
336#ifdef BIDI
337 cString bs = Bidi(s);
338 s = bs;
339#endif
340 bool AntiAliased = Setup.AntiAlias;
341 uint prevSym = 0;
342 while (*s) {
343 int sl = Utf8CharLen(s);
344 uint sym = Utf8CharGet(s, sl);
345 s += sl;
346 cGlyph *g = Glyph(sym, AntiAliased);
347 if (!g)
348 continue;
349 int kerning = Kerning(g, prevSym);
350 prevSym = sym;
351 uchar *buffer = g->Bitmap();
352 int symWidth = g->Width();
353 if (Width && x + symWidth + g->Left() + kerning - 1 > Width)
354 break; // we don't draw partial characters
355 if (x + symWidth + g->Left() + kerning > 0) {
356 for (int row = 0; row < g->Rows(); row++) {
357 for (int pitch = 0; pitch < g->Pitch(); pitch++) {
358 uchar bt = *(buffer + (row * g->Pitch() + pitch));
359 if (AntiAliased) {
360 if (bt > 0x00)
361 Pixmap->DrawPixel(cPoint(x + pitch + g->Left() + kerning, y + row + (height - Bottom() - g->Top())), AlphaBlend(ColorFg, ColorBg, bt));
362 }
363 else { //monochrome rendering
364 for (int col = 0; col < 8 && col + pitch * 8 <= symWidth; col++) {
365 if (bt & 0x80)
366 Pixmap->DrawPixel(cPoint(x + col + pitch * 8 + g->Left() + kerning, y + row + (height - Bottom() - g->Top())), ColorFg);
367 bt <<= 1;
368 }
369 }
370 }
371 }
372 }
373 x += g->AdvanceX() + kerning;
374 if (x > Pixmap->DrawPort().Width() - 1)
375 break;
376 }
377 }
378}
379
380// --- cDummyFont ------------------------------------------------------------
381
382// A dummy font, in case there are no fonts installed:
383
384class cDummyFont : public cFont {
385private:
386 int height;
387public:
388 cDummyFont(int CharHeight) { height = CharHeight; }
389 virtual int Width(uint c) const { return height; }
390 virtual int Width(const char *s) const { return height; }
391 virtual int Height(void) const { return height; }
392 virtual void DrawText(cBitmap *Bitmap, int x, int y, const char *s, tColor ColorFg, tColor ColorBg, int Width) const {}
393 virtual void DrawText(cPixmap *Pixmap, int x, int y, const char *s, tColor ColorFg, tColor ColorBg, int Width) const {};
394 };
395
396// --- cFont -----------------------------------------------------------------
397
398cFont *cFont::fonts[eDvbFontSize(fontSml + 1)] = { NULL__null };
399
400void cFont::SetFont(eDvbFont Font, const char *Name, int CharHeight)
401{
402 delete fonts[Font];
403 fonts[Font] = CreateFont(Name, constrain(CharHeight, MINFONTSIZE10, MAXFONTSIZE64));
404}
405
406const cFont *cFont::GetFont(eDvbFont Font)
407{
408 if (Setup.UseSmallFont == 0 && Font == fontSml)
409 Font = fontOsd;
410 else if (Setup.UseSmallFont == 2)
411 Font = fontSml;
412 if (!fonts[Font]) {
413 switch (Font) {
414 case fontOsd: SetFont(Font, Setup.FontOsd, Setup.FontOsdSize); break;
415 case fontSml: SetFont(Font, Setup.FontSml, min(Setup.FontSmlSize, Setup.FontOsdSize)); break;
416 case fontFix: SetFont(Font, Setup.FontFix, Setup.FontFixSize); break;
417 default: esyslog("ERROR: unknown Font %d (%s %d)", Font, __FUNCTION__, __LINE__)void( (SysLogLevel > 0) ? syslog_with_tid(3, "ERROR: unknown Font %d (%s %d)"
, Font, __FUNCTION__, 417) : void() );
418 }
419 }
420 return fonts[Font];
421}
422
423cFont *cFont::CreateFont(const char *Name, int CharHeight, int CharWidth)
424{
425 cString fn = GetFontFileName(Name);
426 cFont *f = *fn ? new cFreetypeFont(fn, CharHeight, CharWidth) : NULL__null;
427 if (!f || !f->Height())
428 f = new cDummyFont(CharHeight);
429 return f;
430}
431
432bool cFont::GetAvailableFontNames(cStringList *FontNames, bool Monospaced)
433{
434 if (!FontNames->Size()) {
435 FcInit();
436 FcObjectSet *os = FcObjectSetBuild(FC_FAMILY"family", FC_STYLE"style", NULL__null);
437 FcPattern *pat = FcPatternCreate();
438 FcPatternAddBool(pat, FC_SCALABLE"scalable", FcTrue1);
439 if (Monospaced)
440 FcPatternAddInteger(pat, FC_SPACING"spacing", FC_MONO100);
441 FcFontSet* fontset = FcFontList(NULL__null, pat, os);
442 for (int i = 0; i < fontset->nfont; i++) {
443 char *s = (char *)FcNameUnparse(fontset->fonts[i]);
444 if (s) {
445 // Strip i18n stuff:
446 char *c = strchr(s, ':');
447 if (c) {
448 char *p = strchr(c + 1, ',');
449 if (p)
450 *p = 0;
451 }
452 char *p = strchr(s, ',');
453 if (p) {
454 if (c)
455 memmove(p, c, strlen(c) + 1);
456 else
457 *p = 0;
458 }
459 // Make it user presentable:
460 s = strreplace(s, "\\", ""); // '-' is escaped
461 s = strreplace(s, "style=", "");
462 FontNames->Append(s); // takes ownership of s
463 }
464 }
465 FcFontSetDestroy(fontset);
466 FcPatternDestroy(pat);
467 FcObjectSetDestroy(os);
468 //FcFini(); // older versions of fontconfig are broken - and FcInit() can be called more than once
469 FontNames->Sort();
470 }
471 return FontNames->Size() > 0;
472}
473
474cString cFont::GetFontFileName(const char *FontName)
475{
476 cString FontFileName;
477 if (FontName) {
478 char *fn = strdup(FontName);
479 fn = strreplace(fn, ":", ":style=");
480 fn = strreplace(fn, "-", "\\-");
481 FcInit();
482 FcPattern *pat = FcNameParse((FcChar8 *)fn);
483 FcPatternAddBool(pat, FC_SCALABLE"scalable", FcTrue1);
484 FcConfigSubstitute(NULL__null, pat, FcMatchPattern);
485 FcDefaultSubstitute(pat);
486 FcResult fresult;
487 FcFontSet *fontset = FcFontSort(NULL__null, pat, FcFalse0, NULL__null, &fresult);
488 if (fontset) {
489 for (int i = 0; i < fontset->nfont; i++) {
490 FcBool scalable;
491 FcPatternGetBool(fontset->fonts[i], FC_SCALABLE"scalable", 0, &scalable);
492 if (scalable) {
493 FcChar8 *s = NULL__null;
494 FcPatternGetString(fontset->fonts[i], FC_FILE"file", 0, &s);
495 FontFileName = (char *)s;
496 break;
497 }
498 }
499 FcFontSetDestroy(fontset);
500 }
501 else
502 esyslog("ERROR: no usable font found for '%s'", FontName)void( (SysLogLevel > 0) ? syslog_with_tid(3, "ERROR: no usable font found for '%s'"
, FontName) : void() );
503 FcPatternDestroy(pat);
504 free(fn);
505 //FcFini(); // older versions of fontconfig are broken - and FcInit() can be called more than once
506 }
507 return FontFileName;
508}
509
510#ifdef BIDI
511cString cFont::Bidi(const char *Ltr)
512{
513 if (!cCharSetConv::SystemCharacterTable()) { // bidi requires UTF-8
514 fribidi_set_mirroring(true);
515 fribidi_set_reorder_nsm(false);
516 FriBidiCharSet fribidiCharset = FRIBIDI_CHAR_SET_UTF8;
517 int LtrLen = strlen(Ltr);
518 FriBidiCharType Base = FRIBIDI_TYPE_L;
519 FriBidiChar *Logical = MALLOC(FriBidiChar, LtrLen + 1)(FriBidiChar *)malloc(sizeof(FriBidiChar) * (LtrLen + 1)) ;
520 int RtlLen = fribidi_charset_to_unicode(fribidiCharset, const_cast<char *>(Ltr), LtrLen, Logical);
521 FriBidiChar *Visual = MALLOC(FriBidiChar, LtrLen + 1)(FriBidiChar *)malloc(sizeof(FriBidiChar) * (LtrLen + 1)) ;
522 char *Rtl = NULL__null;
523 bool ok = fribidi_log2vis(Logical, RtlLen, &Base, Visual, NULL__null, NULL__null, NULL__null);
524 if (ok) {
525 fribidi_remove_bidi_marks(Visual, RtlLen, NULL__null, NULL__null, NULL__null);
526 Rtl = MALLOC(char, RtlLen * 4 + 1)(char *)malloc(sizeof(char) * (RtlLen * 4 + 1));
527 fribidi_unicode_to_charset(fribidiCharset, Visual, RtlLen, Rtl);
528 }
529 free(Logical);
530 free(Visual);
531 if (ok)
532 return cString(Rtl, true);
533 }
534 return cString(Ltr);
535}
536#endif
537
538// --- cTextWrapper ----------------------------------------------------------
539
540cTextWrapper::cTextWrapper(void)
541{
542 text = eol = NULL__null;
543 lines = 0;
544 lastLine = -1;
545}
546
547cTextWrapper::cTextWrapper(const char *Text, const cFont *Font, int Width)
548{
549 text = NULL__null;
550 Set(Text, Font, Width);
551}
552
553cTextWrapper::~cTextWrapper()
554{
555 free(text);
556}
557
558void cTextWrapper::Set(const char *Text, const cFont *Font, int Width)
559{
560 free(text);
561 text = Text ? strdup(Text) : NULL__null;
1
Assuming 'Text' is non-null
→
2
←
'?' condition is true
→
562 eol = NULL__null;
563 lines = 0;
564 lastLine = -1;
565 if (!text)
3
←
Taking false branch
→
566 return;
567 lines = 1;
568 if (Width <= 0)
4
←
Assuming 'Width' is > 0
→
5
←
Taking false branch
→
569 return;
570
571 char *Blank = NULL__null;
572 char *Delim = NULL__null;
573 int w = 0;
574
575 stripspace(text); // strips trailing newlines
576
577 for (char *p = text; *p; ) {
6
←
Loop condition is true. Entering loop body
→
11
←
Loop condition is true. Entering loop body
→
16
←
Loop condition is true. Entering loop body
→
22
←
Loop condition is true. Entering loop body
→
578 int sl = Utf8CharLen(p);
579 uint sym = Utf8CharGet(p, sl);
580 if (sym == '\n') {
7
←
Taking false branch
→
12
←
Taking false branch
→
17
←
Taking false branch
→
23
←
Taking false branch
→
581 lines++;
582 w = 0;
583 Blank = Delim = NULL__null;
584 p++;
585 continue;
586 }
587 else if (sl == 1 && isspace(sym))
8
←
Assuming 'sl' is not equal to 1
→
13
←
Assuming 'sl' is not equal to 1
→
18
←
Assuming 'sl' is not equal to 1
→
24
←
Assuming 'sl' is equal to 1
→
25
←
Taking true branch
→
588 Blank = p;
589 int cw = Font->Width(sym);
590 if (w + cw > Width) {
9
←
Taking false branch
→
14
←
Taking false branch
→
19
←
Taking false branch
→
26
←
Taking true branch
→
591 if (Blank) {
27
←
Assuming 'Blank' is null
→
28
←
Taking false branch
→
592 *Blank = '\n';
593 p = Blank;
594 continue;
595 }
596 else if (w > 0) { // there has to be at least one character before the newline
29
←
Assuming 'w' is <= 0
→
30
←
Taking false branch
→
597 // Here's the ugly part, where we don't have any whitespace to
598 // punch in a newline, so we need to make room for it:
599 if (Delim)
600 p = Delim + 1; // let's fall back to the most recent delimiter
601 char *s = MALLOC(char, strlen(text) + 2)(char *)malloc(sizeof(char) * (strlen(text) + 2)); // The additional '\n' plus the terminating '\0'
602 int l = p - text;
603 strncpy(s, text, l);
604 s[l] = '\n';
605 strcpy(s + l + 1, p);
606 free(text);
607 text = s;
608 p = text + l;
609 continue;
610 }
611 }
612 w += cw;
613 if (strchr("-.,:;!?_", *p)) {
10
←
Taking false branch
→
15
←
Taking false branch
→
20
←
Taking false branch
→
31
←
Dereference of null pointer (loaded from variable 'p')
614 Delim = p;
615 Blank = NULL__null;
616 }
617 p += sl;
21
←
Value assigned to 'p'
→
618 }
619}
620
621const char *cTextWrapper::Text(void)
622{
623 if (eol) {
624 *eol = '\n';
625 eol = NULL__null;
626 }
627 return text;
628}
629
630const char *cTextWrapper::GetLine(int Line)
631{
632 char *s = NULL__null;
633 if (Line < lines) {
634 if (eol) {
635 *eol = '\n';
636 if (Line == lastLine + 1)
637 s = eol + 1;
638 eol = NULL__null;
639 }
640 if (!s) {
641 s = text;
642 for (int i = 0; i < Line; i++) {
643 s = strchr(s, '\n');
644 if (s)
645 s++;
646 else
647 break;
648 }
649 }
650 if (s) {
651 if ((eol = strchr(s, '\n')) != NULL__null)
652 *eol = 0;
653 }
654 lastLine = Line;
655 }
656 return s;
657}