X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/38755449339718307f594d0c92f7d37ce56c908c..0ba344c712c77e4a6c7b94263b6f39ab22069039:/src/common/xpmdecod.cpp diff --git a/src/common/xpmdecod.cpp b/src/common/xpmdecod.cpp index 08ad872940..1dc78c95d2 100644 --- a/src/common/xpmdecod.cpp +++ b/src/common/xpmdecod.cpp @@ -111,9 +111,12 @@ license is as follows: #include "wx/image.h" #include "wx/utils.h" #include "wx/log.h" +#include "wx/hashmap.h" #include "wx/intl.h" #include +#include + #include "wx/xpmdecod.h" #if wxUSE_STREAMS @@ -121,27 +124,33 @@ bool wxXPMDecoder::CanRead(wxInputStream& stream) { unsigned char buf[9]; - stream.Read(buf, 9); - stream.SeekI(-9, wxFromCurrent); + if ( !stream.Read(buf, WXSIZEOF(buf)) ) + return FALSE; + + stream.SeekI(-(off_t)WXSIZEOF(buf), wxFromCurrent); - return (memcmp(buf, "/* XPM */", 9) == 0); + return memcmp(buf, "/* XPM */", WXSIZEOF(buf)) == 0; } wxImage wxXPMDecoder::ReadFile(wxInputStream& stream) { size_t length = stream.GetSize(); - wxCHECK_MSG(length != 0, wxNullImage, wxT("Cannot read XPM from stream of unknown size")); + wxCHECK_MSG( length != 0, wxNullImage, + wxT("Cannot read XPM from stream of unknown size") ); - char *xpm_buffer = new char[length]; - char *p, *q; - size_t i; + // use a smart buffer to be sure to free memory even when we return on + // error + wxCharBuffer buffer(length); - if ( stream.Read(xpm_buffer, length).LastError() != wxSTREAM_NO_ERROR ) - return FALSE; + char *xpm_buffer = (char *)buffer.data(); + if ( stream.Read(xpm_buffer, length).GetLastError() == wxSTREAM_READ_ERROR ) + return wxNullImage; + xpm_buffer[length] = '\0'; /* * Remove comments from the file: */ + char *p, *q; for (p = xpm_buffer; *p != '\0'; p++) { if ( (*p == '"') || (*p == '\'') ) @@ -175,7 +184,7 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream) /* * Remove unquoted characters: */ - i = 0; + size_t i = 0; for (p = xpm_buffer; *p != '\0'; p++) { if ( *p != '"' ) @@ -203,6 +212,12 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream) lines_cnt++; } + if ( !lines_cnt ) + { + // this doesn't really look an XPM image + return wxNullImage; + } + xpm_lines = new const char*[lines_cnt]; xpm_lines[0] = xpm_buffer; line = 1; @@ -221,8 +236,12 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream) */ wxImage img = ReadData(xpm_lines); - delete[] xpm_buffer; +#ifdef __WIN16__ + delete[] (char**) xpm_lines; +#else delete[] xpm_lines; +#endif + return img; } #endif // wxUSE_STREAMS @@ -245,7 +264,7 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream) typedef struct { - char *name; + const char *name; wxUint32 rgb; } rgbRecord; @@ -491,6 +510,25 @@ static rgbRecord theRGBRecords[] = }; static int numTheRGBRecords = 234; +static unsigned char ParseHexadecimal(char digit1, char digit2) +{ + unsigned char i1, i2; + + if (digit1 >= 'a') + i1 = digit1 - 'a' + 0x0A; + else if (digit1 >= 'A') + i1 = digit1 - 'A' + 0x0A; + else + i1 = digit1 - '0'; + if (digit2 >= 'a') + i2 = digit2 - 'a' + 0x0A; + else if (digit2 >= 'A') + i2 = digit2 - 'A' + 0x0A; + else + i2 = digit2 - '0'; + return (0x10 * i1 + i2); +} + static bool GetRGBFromName(const char *inname, bool *isNone, unsigned char *r, unsigned char*g, unsigned char *b) { @@ -500,19 +538,15 @@ static bool GetRGBFromName(const char *inname, bool *isNone, char *name; char *grey, *p; - // #rrggbb are not in database, we parse them directly - if ( *inname == '#' && strlen(inname) == 7 ) + // Neither #rrggbb nor #rrrrggggbbbb are in database, we parse them directly + size_t inname_len = strlen(inname); + if ( *inname == '#' && (inname_len == 7 || inname_len == 13)) { - char buf[3]; - buf[2] = 0; - buf[0] = inname[1]; buf[1] = inname[2]; - *r = (unsigned char) wxHexToDec(buf); - buf[0] = inname[3]; buf[1] = inname[4]; - *g = (unsigned char) wxHexToDec(buf); - buf[0] = inname[5]; buf[1] = inname[6]; - *b = (unsigned char) wxHexToDec(buf); + size_t ofs = (inname_len == 7) ? 2 : 4; + *r = ParseHexadecimal(inname[1], inname[2]); + *g = ParseHexadecimal(inname[1*ofs+1], inname[1*ofs+2]); + *b = ParseHexadecimal(inname[2*ofs+1], inname[2*ofs+2]); *isNone = FALSE; - return TRUE; } @@ -544,41 +578,47 @@ static bool GetRGBFromName(const char *inname, bool *isNone, grey[2] = 'a'; // check for special 'none' colour: + bool found; if ( strcmp(name, "none") == 0 ) { *isNone = TRUE; - return TRUE; + found = TRUE; } - - // binary search: - left = 0; - right = numTheRGBRecords - 1; - do + else // not "None" { - middle = (left + right) / 2; - cmp = strcmp(name, theRGBRecords[middle].name); - if ( cmp == 0 ) - { - rgbVal = theRGBRecords[middle].rgb; - *r = (rgbVal >> 16) & 0xFF; - *g = (rgbVal >> 8) & 0xFF; - *b = (rgbVal) & 0xFF; - *isNone = FALSE; - free(name); - return TRUE; - } - else if ( cmp < 0 ) + found = FALSE; + + // binary search: + left = 0; + right = numTheRGBRecords - 1; + do { - right = middle - 1; - } - else - { // > 0 - left = middle + 1; - } - } while (left <= right); + middle = (left + right) / 2; + cmp = strcmp(name, theRGBRecords[middle].name); + if ( cmp == 0 ) + { + rgbVal = theRGBRecords[middle].rgb; + *r = (unsigned char)((rgbVal >> 16) & 0xFF); + *g = (unsigned char)((rgbVal >> 8) & 0xFF); + *b = (unsigned char)((rgbVal) & 0xFF); + *isNone = FALSE; + found = TRUE; + break; + } + else if ( cmp < 0 ) + { + right = middle - 1; + } + else // cmp > 0 + { + left = middle + 1; + } + } while (left <= right); + } free(name); - return FALSE; + + return found; } static const char *ParseColor(const char *data) @@ -613,27 +653,28 @@ static const char *ParseColor(const char *data) return NULL; } -class wxXPMColourMapData : public wxObject +struct wxXPMColourMapData { - public: - unsigned char R,G,B; + unsigned char R,G,B; }; +WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap) wxImage wxXPMDecoder::ReadData(const char **xpm_data) { wxImage img; int count; unsigned width, height, colors_cnt, chars_per_pixel; - unsigned i, j; - char key[64]; + size_t i, j, i_key; + wxChar key[64]; const char *clr_def; bool hasMask; - wxXPMColourMapData *clr_data; - wxHashTable clr_tbl(wxKEY_STRING); + wxXPMColourMapData clr_data; + wxXPMColourMap clr_tbl; /* * Read hints and initialize structures: */ + count = sscanf(xpm_data[0], "%u %u %u %u", &width, &height, &colors_cnt, &chars_per_pixel); if ( count != 4 || width * height * colors_cnt == 0 ) @@ -651,32 +692,31 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data) if ( !img.Ok() ) return img; img.SetMask(FALSE); - key[chars_per_pixel] = '\0'; + key[chars_per_pixel] = wxT('\0'); hasMask = FALSE; - clr_tbl.DeleteContents(TRUE); /* * Create colour map: */ for (i = 0; i < colors_cnt; i++) { - memcpy(key, xpm_data[1 + i], chars_per_pixel); - clr_def = ParseColor(xpm_data[1 + i]); - clr_data = new wxXPMColourMapData; + for (i_key = 0; i_key < chars_per_pixel; i_key++) + key[i_key] = (wxChar)xpm_data[1 + i][i_key]; + clr_def = ParseColor(xpm_data[1 + i] + chars_per_pixel); if ( clr_def == NULL ) { wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]); - clr_data->R = 255, clr_data->G = 0, clr_data->B = 255; + clr_data.R = 255, clr_data.G = 0, clr_data.B = 255; } else { bool isNone; if ( !GetRGBFromName(clr_def, &isNone, - &clr_data->R, &clr_data->G, &clr_data->B) ) + &clr_data.R, &clr_data.G, &clr_data.B) ) { wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]); - clr_data->R = 255, clr_data->G = 0, clr_data->B = 255; + clr_data.R = 255, clr_data.G = 0, clr_data.B = 255; } else { @@ -685,17 +725,17 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data) img.SetMask(TRUE); img.SetMaskColour(255, 0, 255); hasMask = TRUE; - clr_data->R = 255, clr_data->G = 0, clr_data->B = 255; + clr_data.R = 255, clr_data.G = 0, clr_data.B = 255; } else { - if ( hasMask && clr_data->R == 255 && - clr_data->G == 0 && clr_data->B == 255 ) - clr_data->B = 254; + if ( hasMask && clr_data.R == 255 && + clr_data.G == 0 && clr_data.B == 255 ) + clr_data.B = 254; } } } - clr_tbl.Put(key, clr_data); + clr_tbl[key] = clr_data; } /* @@ -703,23 +743,26 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data) */ unsigned char *img_data = img.GetData(); + wxXPMColourMap::iterator entry; + wxXPMColourMap::iterator end = clr_tbl.end(); + for (j = 0; j < height; j++) { for (i = 0; i < width; i++, img_data += 3) { - memcpy(key, - xpm_data[1 + colors_cnt + j] + chars_per_pixel * i, - chars_per_pixel); - clr_data = (wxXPMColourMapData*) clr_tbl.Get(key); - if ( clr_data == NULL ) + for (i_key = 0; i_key < chars_per_pixel; i_key++) + key[i_key] = (wxChar)xpm_data[1 + colors_cnt + j] + [chars_per_pixel * i + i_key]; + entry = clr_tbl.find(key); + if ( entry == end ) { wxLogError(_("XPM: Malformed pixel data!")); } else { - img_data[0] = clr_data->R; - img_data[1] = clr_data->G; - img_data[2] = clr_data->B; + img_data[0] = entry->second.R; + img_data[1] = entry->second.G; + img_data[2] = entry->second.B; } } } @@ -727,5 +770,4 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data) return img; } - #endif // wxUSE_IMAGE && wxUSE_XPM