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Diffstat (limited to 'src/utilfuns/utilstr.cpp')
| -rw-r--r-- | src/utilfuns/utilstr.cpp | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/src/utilfuns/utilstr.cpp b/src/utilfuns/utilstr.cpp new file mode 100644 index 0000000..cabd455 --- /dev/null +++ b/src/utilfuns/utilstr.cpp @@ -0,0 +1,413 @@ +/****************************************************************************** + * + * utilstr.cpp - String utility functions + * + * $Id: utilstr.cpp 2982 2013-09-15 13:33:03Z scribe $ + * + * Copyright 1997-2013 CrossWire Bible Society (http://www.crosswire.org) + * CrossWire Bible Society + * P. O. Box 2528 + * Tempe, AZ 85280-2528 + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + */ + +#include <utilstr.h> +#include <ctype.h> +#include <string.h> + +#include <sysdata.h> +#include <swlog.h> +#include <swbuf.h> + + +SWORD_NAMESPACE_START + +const unsigned char SW_toupper_array[256] = { + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, + 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, + 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, + 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, + 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, + 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, + 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, + 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, + 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, + 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, + 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, + 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, + 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, + 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, + 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, + 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, + 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, + 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, + 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, + 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, + 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, + 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, + 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, + 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, + 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, + 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xf7, + 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xff +}; + + +/****************************************************************************** + * stdstr - clones a string + * + * ENT: ipstr - pointer to a string pointer to set if necessary + * istr - string to set to *ipstr + * 0 - only get + * + * RET: *ipstr + */ + +char *stdstr(char **ipstr, const char *istr, unsigned int memPadFactor) { + if (*ipstr) + delete [] *ipstr; + if (istr) { + int len = strlen(istr) + 1; + *ipstr = new char [ len * memPadFactor ]; + memcpy(*ipstr, istr, len); + } + else *ipstr = 0; + return *ipstr; +} + + +/****************************************************************************** + * strstrip - Removes leading and trailing spaces from a string + * + * ENT: istr - string pointer to strip + * + * RET: *istr + */ + +char *strstrip(char *istr) { + char *tmp = istr; + char *rtmp; + + int len = strlen(istr); + if (len < 1) + return istr; + rtmp = istr + (len - 1); + + while ((rtmp > istr)&&((*rtmp == ' ')||(*rtmp == '\t')||(*rtmp == 10)||(*rtmp == 13))) *(rtmp--) = 0; + while ((*tmp == ' ')||(*tmp == '\t')||(*tmp == 10)||(*tmp == 13)) tmp++; + memmove(istr, tmp, (rtmp - tmp) + 1); + istr[(rtmp - tmp) + 1] = 0; + + return istr; +} + + +/****************************************************************************** + * stristr - Scans a string for the occurrence of a given substring, no case + * + * ENT: scans s1 for the first occurrence of the substring s2, ingnoring case + * + * RET: a pointer to the element in s1, where s2 begins (points to s2 in s1). + * If s2 does not occur in s1, returns null. + */ + +const char *stristr(const char *s1, const char *s2) { + int tLen = strlen(s2); + int cLen = strlen(s1); + char *target = new char [ tLen + 1 ]; + int i, j; + const char *retVal = 0; + + strcpy(target, s2); + for (i = 0; i < tLen; i++) + target[i] = SW_toupper(target[i]); + + for (i = 0; i < (cLen - tLen)+1; i++) { + if (SW_toupper(s1[i]) == (unsigned char)*target) { + for (j = 1; j < tLen; j++) { + if (SW_toupper(s1[i+j]) != (unsigned char)target[j]) + break; + } + if (j == tLen) { + retVal = s1+i; + break; + } + } + } + delete [] target; + return retVal; +} + +/****************************************************************************** + * strnicmp - compares the first n bytes of 2 strings ignoring case + * + * ENT: compares s1 to s2 comparing the first n byte ingnoring case + * + * RET: same as strcmp + */ + +int strnicmp(const char *s1, const char *s2, int len) { + int tLen = strlen(s2); + int cLen = strlen(s1); + char diff; + int i; + for (i = 0; ((i < len) && (i < tLen) && (i < cLen)); i++) { + if ((diff = SW_toupper(*s1) - SW_toupper(*s2))) + return diff; + s1++; + s2++; + } + return (i < len) ? cLen - tLen : 0; +} + +int stricmp(const char *s1, const char *s2) { +#if defined(__GNUC__) + return ::strcasecmp(s1, s2); +#else + #if defined(_WIN32_WCE) + return ::_stricmp(s1, s2); + #else + return ::stricmp(s1, s2); + #endif +#endif +} + + +/****************************************************************************** + * getUniCharFromUTF8 - retrieves the next Unicode codepoint from a UTF8 string + * and increments buf to start of next codepoint + * + * ENT: buf - address of a utf8 buffer + * + * RET: buf - incremented past last byte used in computing the current codepoint + * unicode codepoint value (0 with buf incremented is invalid UTF8 byte + */ + +__u32 getUniCharFromUTF8(const unsigned char **buf) { + __u32 ch = 0; + unsigned char multibuf[7]; + + //case: We're at the end + if (!(**buf)) { + return ch; + } + + //case: ANSI + if (!(**buf & 128)) { + ch = **buf; + (*buf)++; + return ch; + } + + //case: Invalid UTF-8 (illegal continuing byte in initial position) + if ((**buf & 128) && (!(**buf & 64))) { + (*buf)++; + return ch; + } + + //case: 2+ byte codepoint + multibuf[0] = **buf; + multibuf[0] <<= 1; + int subsequent; + for (subsequent = 1; (multibuf[0] & 128) && (subsequent < 7); subsequent++) { + multibuf[0] <<= 1; + multibuf[subsequent] = (*buf)[subsequent]; + multibuf[subsequent] &= 63; + // subsequent byte did not begin with 10XXXXXX + // move our buffer to here and error out + if (((*buf)[subsequent] - multibuf[subsequent]) != 128) { + *buf += subsequent; + return 0; + } + ch <<= 6; + ch |= multibuf[subsequent]; + } + subsequent--; + multibuf[0] <<= 1; + char significantFirstBits = 8 - (2+subsequent); + + ch |= (((__s16)multibuf[0]) << (((6*subsequent)+significantFirstBits)-8)); + *buf += (subsequent+1); + return ch; +} + + +SWBuf getUTF8FromUniChar(__u32 uchar) { + SWBuf retVal("", 7); + unsigned int i; + + if (uchar < 0x80) { + retVal.append((unsigned char)uchar); + retVal.setSize(1); + } + else if (uchar < 0x800) { + retVal.setSize(2); + i = uchar & 0x3f; + retVal[1] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x1f; + retVal[0] = (unsigned char)(0xc0 | i); + } + else if (uchar < 0x10000) { + retVal.setSize(3); + i = uchar & 0x3f; + retVal[2] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[1] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x0f; + retVal[0] = (unsigned char)(0xe0 | i); + } + else if (uchar < 0x200000) { + retVal.setSize(4); + i = uchar & 0x3f; + retVal[3] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[2] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[1] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x07; + retVal[0] = (unsigned char)(0xf0 | i); + } + else if (uchar < 0x4000000) { + retVal.setSize(5); + i = uchar & 0x3f; + retVal[4] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[3] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[2] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[1] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x03; + retVal[0] = (unsigned char)(0xf8 | i); + } + else if (uchar < 0x80000000) { + retVal.setSize(6); + i = uchar & 0x3f; + retVal[5] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[4] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[3] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[2] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x3f; + retVal[1] = (unsigned char)(0x80 | i); + uchar >>= 6; + + i = uchar & 0x01; + retVal[0] = (unsigned char)(0xfc | i); + } + + return retVal; +} + + +SWBuf assureValidUTF8(const char *buf) { + + SWBuf myCopy = buf; + const unsigned char *b = (const unsigned char *)myCopy.c_str(); + const unsigned char *q = 0; + bool invalidChar = false; + while (*b) { + q = b; + if (!getUniCharFromUTF8(&b)) { + long len = b - q; + if (len) { + invalidChar = true; + for (long start = q - (const unsigned char *)myCopy.c_str(); len; len--) { + myCopy[start+len-1] = 0x1a; // unicode replacement character + } + + } + } + } + if (invalidChar) { +// SWLog::getSystemLog()->logWarning("Changing invalid UTF-8 string (%s) to (%s)\n", buf, myCopy.c_str()); + } + return myCopy; +} + + +/**** + * This can be called to convert a UTF8 stream to an SWBuf which manages + * a wchar_t[] + * access buffer with (wchar_t *)SWBuf::getRawData(); + * + */ +SWBuf utf8ToWChar(const char *buf) { + + const char *q = 0; + SWBuf wcharBuf; + while (*buf) { + q = buf; + wchar_t wc = getUniCharFromUTF8((const unsigned char **)&buf); + if (!wc) { + // if my buffer was advanced but nothing was converted, I had invalid data + if (buf - q) { + // invalid bytes in UTF8 stream + wcharBuf.append((wchar_t)0x1a); // unicode replacement character + } + } + else wcharBuf.append(wc); + } + return wcharBuf; +} + + +/**** + * This can be called to convert a wchar_t[] to a UTF-8 SWBuf + * + */ +SWBuf wcharToUTF8(const wchar_t *buf) { + + SWBuf utf8Buf; + while (*buf) { + utf8Buf.append(getUTF8FromUniChar(*buf++)); + } + return utf8Buf; +} + + +SWORD_NAMESPACE_END |