X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/424f5e27007ebf54b3b186e48d05d1c039c8e6ea..33754c4d83c59b7523a6da0c4fb21079cb60301c:/src/common/xpmdecod.cpp diff --git a/src/common/xpmdecod.cpp b/src/common/xpmdecod.cpp index 68a56d1788..6f593fc989 100644 --- a/src/common/xpmdecod.cpp +++ b/src/common/xpmdecod.cpp @@ -114,6 +114,10 @@ license is as follows: #include "wx/intl.h" #include +#ifdef __VISUALC__ +#include +#endif + #include "wx/xpmdecod.h" #if wxUSE_STREAMS @@ -130,18 +134,22 @@ bool wxXPMDecoder::CanRead(wxInputStream& stream) wxImage wxXPMDecoder::ReadFile(wxInputStream& stream) { size_t length = stream.GetSize(); - 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; + wxCHECK_MSG( length != 0, wxNullImage, + wxT("Cannot read XPM from stream of unknown size") ); + + // use a smart buffer to be sure to free memory even when we return on + // error + wxCharBuffer buffer(length); + + char *xpm_buffer = (char *)buffer.data(); + if ( stream.Read(xpm_buffer, length).LastError() == wxSTREAM_READ_ERROR ) + return wxNullImage; + xpm_buffer[length] = '\0'; - if ( stream.Read(xpm_buffer, length).LastError() != wxSTREAM_NO_ERROR ) - return FALSE; - /* * Remove comments from the file: */ + char *p, *q; for (p = xpm_buffer; *p != '\0'; p++) { if ( (*p == '"') || (*p == '\'') ) @@ -175,10 +183,10 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream) /* * Remove unquoted characters: */ - i = 0; + size_t i = 0; for (p = xpm_buffer; *p != '\0'; p++) { - if ( *p != '"' ) + if ( *p != '"' ) continue; for (q = p + 1; *q != '\0'; q++) if (*q == '"') @@ -189,40 +197,50 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream) p = q + 1; } xpm_buffer[i] = '\0'; - + /* * Create array of lines and convert \n's to \0's: */ const char **xpm_lines; size_t lines_cnt = 0; size_t line; - + for (p = xpm_buffer; *p != '\0'; p++) { - if ( *p == '\n' ) + if ( *p == '\n' ) 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; for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++) { - if ( *p == '\n' ) + if ( *p == '\n' ) { xpm_lines[line] = p + 1; *p = '\0'; line++; } } - + /* * Read the image: */ wxImage img = ReadData(xpm_lines); - - delete[] xpm_buffer; + +#ifdef __WIN16__ + delete[] (char**) xpm_lines; +#else delete[] xpm_lines; +#endif + return img; } #endif // wxUSE_STREAMS @@ -243,7 +261,7 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream) \*****************************************************************************/ -typedef struct +typedef struct { char *name; wxUint32 rgb; @@ -491,6 +509,25 @@ 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 +537,15 @@ 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; } @@ -522,7 +555,7 @@ static bool GetRGBFromName(const char *inname, bool *isNone, // lot of gray... // so first extract ' ' - while ((p = strchr(name, ' '))) + while ((p = strchr(name, ' ')) != NULL) { while (*(p)) // till eof of string { @@ -532,7 +565,7 @@ static bool GetRGBFromName(const char *inname, bool *isNone, } // fold to lower case p = name; - while (*p) + while (*p) { *p = tolower(*p); p++; @@ -540,50 +573,56 @@ static bool GetRGBFromName(const char *inname, bool *isNone, // substitute Grey with Gray, else rgbtab.h would have more than 100 // 'duplicate' entries - if ( (grey = strstr(name, "grey")) ) + if ( (grey = strstr(name, "grey")) != NULL ) 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) { - static const char *targets[] = + static const char *targets[] = {"c ", "g ", "g4 ", "m ", "b ", "s ", NULL}; const char *p, *r; @@ -624,17 +663,18 @@ 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); - + /* * Read hints and initialize structures: */ - count = sscanf(xpm_data[0], "%u %u %u %u", + + count = sscanf(xpm_data[0], "%u %u %u %u", &width, &height, &colors_cnt, &chars_per_pixel); if ( count != 4 || width * height * colors_cnt == 0 ) { @@ -646,21 +686,22 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data) // 92 possible values on each position, 92^64 is *way* larger space than // 8bit RGB... wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported.")); - + img.Create(width, height); 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); + 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]); clr_data = new wxXPMColourMapData; @@ -672,7 +713,7 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data) else { bool isNone; - if ( !GetRGBFromName(clr_def, &isNone, + if ( !GetRGBFromName(clr_def, &isNone, &clr_data->R, &clr_data->G, &clr_data->B) ) { wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]); @@ -689,7 +730,7 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data) } else { - if ( hasMask && clr_data->R == 255 && + if ( hasMask && clr_data->R == 255 && clr_data->G == 0 && clr_data->B == 255 ) clr_data->B = 254; } @@ -701,15 +742,15 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data) /* * Parse image data: */ - + unsigned char *img_data = img.GetData(); 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); + 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]; clr_data = (wxXPMColourMapData*) clr_tbl.Get(key); if ( clr_data == NULL ) { @@ -727,5 +768,4 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data) return img; } - #endif // wxUSE_IMAGE && wxUSE_XPM