1051 lines
26 KiB
C
1051 lines
26 KiB
C
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/*
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* string.c : an XML string utilities module
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*
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* This module provides various utility functions for manipulating
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* the xmlChar* type. All functions named xmlStr* have been moved here
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* from the parser.c file (their original home).
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*
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* See Copyright for the status of this software.
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*
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* UTF8 string routines from:
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* William Brack <wbrack@mmm.com.hk>
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*
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* daniel@veillard.com
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*/
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#define IN_LIBXML
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#include "libxml.h"
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#include <stdlib.h>
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#include <string.h>
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#include <libxml/xmlmemory.h>
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#include <libxml/parserInternals.h>
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#include <libxml/xmlstring.h>
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/************************************************************************
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* *
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* Commodity functions to handle xmlChars *
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* *
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************************************************************************/
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/**
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* xmlStrndup:
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* @cur: the input xmlChar *
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* @len: the len of @cur
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*
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* a strndup for array of xmlChar's
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*
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* Returns a new xmlChar * or NULL
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*/
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xmlChar *
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xmlStrndup(const xmlChar *cur, int len) {
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xmlChar *ret;
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if ((cur == NULL) || (len < 0)) return(NULL);
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ret = (xmlChar *) xmlMallocAtomic((len + 1) * sizeof(xmlChar));
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if (ret == NULL) {
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xmlErrMemory(NULL, NULL);
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return(NULL);
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}
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memcpy(ret, cur, len * sizeof(xmlChar));
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ret[len] = 0;
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return(ret);
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}
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/**
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* xmlStrdup:
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* @cur: the input xmlChar *
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*
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* a strdup for array of xmlChar's. Since they are supposed to be
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* encoded in UTF-8 or an encoding with 8bit based chars, we assume
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* a termination mark of '0'.
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*
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* Returns a new xmlChar * or NULL
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*/
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xmlChar *
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xmlStrdup(const xmlChar *cur) {
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const xmlChar *p = cur;
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if (cur == NULL) return(NULL);
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while (*p != 0) p++; /* non input consuming */
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return(xmlStrndup(cur, p - cur));
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}
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/**
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* xmlCharStrndup:
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* @cur: the input char *
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* @len: the len of @cur
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*
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* a strndup for char's to xmlChar's
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*
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* Returns a new xmlChar * or NULL
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*/
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xmlChar *
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xmlCharStrndup(const char *cur, int len) {
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int i;
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xmlChar *ret;
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if ((cur == NULL) || (len < 0)) return(NULL);
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ret = (xmlChar *) xmlMallocAtomic((len + 1) * sizeof(xmlChar));
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if (ret == NULL) {
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xmlErrMemory(NULL, NULL);
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return(NULL);
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}
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for (i = 0;i < len;i++) {
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ret[i] = (xmlChar) cur[i];
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if (ret[i] == 0) return(ret);
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}
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ret[len] = 0;
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return(ret);
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}
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/**
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* xmlCharStrdup:
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* @cur: the input char *
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*
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* a strdup for char's to xmlChar's
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*
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* Returns a new xmlChar * or NULL
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*/
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xmlChar *
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xmlCharStrdup(const char *cur) {
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const char *p = cur;
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if (cur == NULL) return(NULL);
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while (*p != '\0') p++; /* non input consuming */
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return(xmlCharStrndup(cur, p - cur));
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}
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/**
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* xmlStrcmp:
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* @str1: the first xmlChar *
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* @str2: the second xmlChar *
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*
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* a strcmp for xmlChar's
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*
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* Returns the integer result of the comparison
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*/
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int
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xmlStrcmp(const xmlChar *str1, const xmlChar *str2) {
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if (str1 == str2) return(0);
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if (str1 == NULL) return(-1);
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if (str2 == NULL) return(1);
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#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
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return(strcmp((const char *)str1, (const char *)str2));
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#else
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do {
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int tmp = *str1++ - *str2;
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if (tmp != 0) return(tmp);
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} while (*str2++ != 0);
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return 0;
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#endif
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}
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/**
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* xmlStrEqual:
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* @str1: the first xmlChar *
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* @str2: the second xmlChar *
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*
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* Check if both strings are equal of have same content.
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* Should be a bit more readable and faster than xmlStrcmp()
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*
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* Returns 1 if they are equal, 0 if they are different
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*/
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int
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xmlStrEqual(const xmlChar *str1, const xmlChar *str2) {
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if (str1 == str2) return(1);
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if (str1 == NULL) return(0);
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if (str2 == NULL) return(0);
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#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
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return(strcmp((const char *)str1, (const char *)str2) == 0);
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#else
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do {
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if (*str1++ != *str2) return(0);
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} while (*str2++);
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return(1);
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#endif
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}
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/**
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* xmlStrQEqual:
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* @pref: the prefix of the QName
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* @name: the localname of the QName
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* @str: the second xmlChar *
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*
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* Check if a QName is Equal to a given string
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*
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* Returns 1 if they are equal, 0 if they are different
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*/
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int
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xmlStrQEqual(const xmlChar *pref, const xmlChar *name, const xmlChar *str) {
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if (pref == NULL) return(xmlStrEqual(name, str));
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if (name == NULL) return(0);
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if (str == NULL) return(0);
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do {
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if (*pref++ != *str) return(0);
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} while ((*str++) && (*pref));
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if (*str++ != ':') return(0);
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do {
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if (*name++ != *str) return(0);
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} while (*str++);
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return(1);
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}
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/**
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* xmlStrncmp:
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* @str1: the first xmlChar *
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* @str2: the second xmlChar *
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* @len: the max comparison length
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*
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* a strncmp for xmlChar's
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*
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* Returns the integer result of the comparison
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*/
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int
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xmlStrncmp(const xmlChar *str1, const xmlChar *str2, int len) {
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if (len <= 0) return(0);
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if (str1 == str2) return(0);
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if (str1 == NULL) return(-1);
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if (str2 == NULL) return(1);
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#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
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return(strncmp((const char *)str1, (const char *)str2, len));
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#else
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do {
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int tmp = *str1++ - *str2;
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if (tmp != 0 || --len == 0) return(tmp);
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} while (*str2++ != 0);
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return 0;
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#endif
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}
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static const xmlChar casemap[256] = {
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0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,
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0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
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0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,
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0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
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0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,
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0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
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0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,
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0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
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0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
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0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
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0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,
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0x78,0x79,0x7A,0x7B,0x5C,0x5D,0x5E,0x5F,
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0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
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0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
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0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,
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0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,
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0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,
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0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
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0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
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0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
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0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,
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0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
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0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,
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0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
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0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,
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0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
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0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,
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0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
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0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,
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0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
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0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,
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0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF
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};
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/**
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* xmlStrcasecmp:
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* @str1: the first xmlChar *
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* @str2: the second xmlChar *
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*
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* a strcasecmp for xmlChar's
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*
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* Returns the integer result of the comparison
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*/
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int
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xmlStrcasecmp(const xmlChar *str1, const xmlChar *str2) {
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register int tmp;
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if (str1 == str2) return(0);
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if (str1 == NULL) return(-1);
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if (str2 == NULL) return(1);
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do {
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tmp = casemap[*str1++] - casemap[*str2];
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if (tmp != 0) return(tmp);
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} while (*str2++ != 0);
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return 0;
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}
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/**
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* xmlStrncasecmp:
|
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* @str1: the first xmlChar *
|
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|
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* @str2: the second xmlChar *
|
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|
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* @len: the max comparison length
|
||
|
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*
|
||
|
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* a strncasecmp for xmlChar's
|
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*
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* Returns the integer result of the comparison
|
||
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*/
|
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int
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xmlStrncasecmp(const xmlChar *str1, const xmlChar *str2, int len) {
|
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register int tmp;
|
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|
|
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||
|
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if (len <= 0) return(0);
|
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|
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if (str1 == str2) return(0);
|
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|
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if (str1 == NULL) return(-1);
|
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|
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if (str2 == NULL) return(1);
|
||
|
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do {
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|
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tmp = casemap[*str1++] - casemap[*str2];
|
||
|
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if (tmp != 0 || --len == 0) return(tmp);
|
||
|
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} while (*str2++ != 0);
|
||
|
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return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrchr:
|
||
|
|
* @str: the xmlChar * array
|
||
|
|
* @val: the xmlChar to search
|
||
|
|
*
|
||
|
|
* a strchr for xmlChar's
|
||
|
|
*
|
||
|
|
* Returns the xmlChar * for the first occurrence or NULL.
|
||
|
|
*/
|
||
|
|
|
||
|
|
const xmlChar *
|
||
|
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xmlStrchr(const xmlChar *str, xmlChar val) {
|
||
|
|
if (str == NULL) return(NULL);
|
||
|
|
while (*str != 0) { /* non input consuming */
|
||
|
|
if (*str == val) return((xmlChar *) str);
|
||
|
|
str++;
|
||
|
|
}
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrstr:
|
||
|
|
* @str: the xmlChar * array (haystack)
|
||
|
|
* @val: the xmlChar to search (needle)
|
||
|
|
*
|
||
|
|
* a strstr for xmlChar's
|
||
|
|
*
|
||
|
|
* Returns the xmlChar * for the first occurrence or NULL.
|
||
|
|
*/
|
||
|
|
|
||
|
|
const xmlChar *
|
||
|
|
xmlStrstr(const xmlChar *str, const xmlChar *val) {
|
||
|
|
int n;
|
||
|
|
|
||
|
|
if (str == NULL) return(NULL);
|
||
|
|
if (val == NULL) return(NULL);
|
||
|
|
n = xmlStrlen(val);
|
||
|
|
|
||
|
|
if (n == 0) return(str);
|
||
|
|
while (*str != 0) { /* non input consuming */
|
||
|
|
if (*str == *val) {
|
||
|
|
if (!xmlStrncmp(str, val, n)) return((const xmlChar *) str);
|
||
|
|
}
|
||
|
|
str++;
|
||
|
|
}
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrcasestr:
|
||
|
|
* @str: the xmlChar * array (haystack)
|
||
|
|
* @val: the xmlChar to search (needle)
|
||
|
|
*
|
||
|
|
* a case-ignoring strstr for xmlChar's
|
||
|
|
*
|
||
|
|
* Returns the xmlChar * for the first occurrence or NULL.
|
||
|
|
*/
|
||
|
|
|
||
|
|
const xmlChar *
|
||
|
|
xmlStrcasestr(const xmlChar *str, const xmlChar *val) {
|
||
|
|
int n;
|
||
|
|
|
||
|
|
if (str == NULL) return(NULL);
|
||
|
|
if (val == NULL) return(NULL);
|
||
|
|
n = xmlStrlen(val);
|
||
|
|
|
||
|
|
if (n == 0) return(str);
|
||
|
|
while (*str != 0) { /* non input consuming */
|
||
|
|
if (casemap[*str] == casemap[*val])
|
||
|
|
if (!xmlStrncasecmp(str, val, n)) return(str);
|
||
|
|
str++;
|
||
|
|
}
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrsub:
|
||
|
|
* @str: the xmlChar * array (haystack)
|
||
|
|
* @start: the index of the first char (zero based)
|
||
|
|
* @len: the length of the substring
|
||
|
|
*
|
||
|
|
* Extract a substring of a given string
|
||
|
|
*
|
||
|
|
* Returns the xmlChar * for the first occurrence or NULL.
|
||
|
|
*/
|
||
|
|
|
||
|
|
xmlChar *
|
||
|
|
xmlStrsub(const xmlChar *str, int start, int len) {
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (str == NULL) return(NULL);
|
||
|
|
if (start < 0) return(NULL);
|
||
|
|
if (len < 0) return(NULL);
|
||
|
|
|
||
|
|
for (i = 0;i < start;i++) {
|
||
|
|
if (*str == 0) return(NULL);
|
||
|
|
str++;
|
||
|
|
}
|
||
|
|
if (*str == 0) return(NULL);
|
||
|
|
return(xmlStrndup(str, len));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrlen:
|
||
|
|
* @str: the xmlChar * array
|
||
|
|
*
|
||
|
|
* length of a xmlChar's string
|
||
|
|
*
|
||
|
|
* Returns the number of xmlChar contained in the ARRAY.
|
||
|
|
*/
|
||
|
|
|
||
|
|
int
|
||
|
|
xmlStrlen(const xmlChar *str) {
|
||
|
|
int len = 0;
|
||
|
|
|
||
|
|
if (str == NULL) return(0);
|
||
|
|
while (*str != 0) { /* non input consuming */
|
||
|
|
str++;
|
||
|
|
len++;
|
||
|
|
}
|
||
|
|
return(len);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrncat:
|
||
|
|
* @cur: the original xmlChar * array
|
||
|
|
* @add: the xmlChar * array added
|
||
|
|
* @len: the length of @add
|
||
|
|
*
|
||
|
|
* a strncat for array of xmlChar's, it will extend @cur with the len
|
||
|
|
* first bytes of @add. Note that if @len < 0 then this is an API error
|
||
|
|
* and NULL will be returned.
|
||
|
|
*
|
||
|
|
* Returns a new xmlChar *, the original @cur is reallocated and should
|
||
|
|
* not be freed.
|
||
|
|
*/
|
||
|
|
|
||
|
|
xmlChar *
|
||
|
|
xmlStrncat(xmlChar *cur, const xmlChar *add, int len) {
|
||
|
|
int size;
|
||
|
|
xmlChar *ret;
|
||
|
|
|
||
|
|
if ((add == NULL) || (len == 0))
|
||
|
|
return(cur);
|
||
|
|
if (len < 0)
|
||
|
|
return(NULL);
|
||
|
|
if (cur == NULL)
|
||
|
|
return(xmlStrndup(add, len));
|
||
|
|
|
||
|
|
size = xmlStrlen(cur);
|
||
|
|
if (size < 0)
|
||
|
|
return(NULL);
|
||
|
|
ret = (xmlChar *) xmlRealloc(cur, (size + len + 1) * sizeof(xmlChar));
|
||
|
|
if (ret == NULL) {
|
||
|
|
xmlErrMemory(NULL, NULL);
|
||
|
|
return(cur);
|
||
|
|
}
|
||
|
|
memcpy(&ret[size], add, len * sizeof(xmlChar));
|
||
|
|
ret[size + len] = 0;
|
||
|
|
return(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrncatNew:
|
||
|
|
* @str1: first xmlChar string
|
||
|
|
* @str2: second xmlChar string
|
||
|
|
* @len: the len of @str2 or < 0
|
||
|
|
*
|
||
|
|
* same as xmlStrncat, but creates a new string. The original
|
||
|
|
* two strings are not freed. If @len is < 0 then the length
|
||
|
|
* will be calculated automatically.
|
||
|
|
*
|
||
|
|
* Returns a new xmlChar * or NULL
|
||
|
|
*/
|
||
|
|
xmlChar *
|
||
|
|
xmlStrncatNew(const xmlChar *str1, const xmlChar *str2, int len) {
|
||
|
|
int size;
|
||
|
|
xmlChar *ret;
|
||
|
|
|
||
|
|
if (len < 0) {
|
||
|
|
len = xmlStrlen(str2);
|
||
|
|
if (len < 0)
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
if ((str2 == NULL) || (len == 0))
|
||
|
|
return(xmlStrdup(str1));
|
||
|
|
if (str1 == NULL)
|
||
|
|
return(xmlStrndup(str2, len));
|
||
|
|
|
||
|
|
size = xmlStrlen(str1);
|
||
|
|
if (size < 0)
|
||
|
|
return(NULL);
|
||
|
|
ret = (xmlChar *) xmlMalloc((size + len + 1) * sizeof(xmlChar));
|
||
|
|
if (ret == NULL) {
|
||
|
|
xmlErrMemory(NULL, NULL);
|
||
|
|
return(xmlStrndup(str1, size));
|
||
|
|
}
|
||
|
|
memcpy(ret, str1, size * sizeof(xmlChar));
|
||
|
|
memcpy(&ret[size], str2, len * sizeof(xmlChar));
|
||
|
|
ret[size + len] = 0;
|
||
|
|
return(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrcat:
|
||
|
|
* @cur: the original xmlChar * array
|
||
|
|
* @add: the xmlChar * array added
|
||
|
|
*
|
||
|
|
* a strcat for array of xmlChar's. Since they are supposed to be
|
||
|
|
* encoded in UTF-8 or an encoding with 8bit based chars, we assume
|
||
|
|
* a termination mark of '0'.
|
||
|
|
*
|
||
|
|
* Returns a new xmlChar * containing the concatenated string. The original
|
||
|
|
* @cur is reallocated and should not be freed.
|
||
|
|
*/
|
||
|
|
xmlChar *
|
||
|
|
xmlStrcat(xmlChar *cur, const xmlChar *add) {
|
||
|
|
const xmlChar *p = add;
|
||
|
|
|
||
|
|
if (add == NULL) return(cur);
|
||
|
|
if (cur == NULL)
|
||
|
|
return(xmlStrdup(add));
|
||
|
|
|
||
|
|
while (*p != 0) p++; /* non input consuming */
|
||
|
|
return(xmlStrncat(cur, add, p - add));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrPrintf:
|
||
|
|
* @buf: the result buffer.
|
||
|
|
* @len: the result buffer length.
|
||
|
|
* @msg: the message with printf formatting.
|
||
|
|
* @...: extra parameters for the message.
|
||
|
|
*
|
||
|
|
* Formats @msg and places result into @buf.
|
||
|
|
*
|
||
|
|
* Returns the number of characters written to @buf or -1 if an error occurs.
|
||
|
|
*/
|
||
|
|
int XMLCDECL
|
||
|
|
xmlStrPrintf(xmlChar *buf, int len, const char *msg, ...) {
|
||
|
|
va_list args;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if((buf == NULL) || (msg == NULL)) {
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
va_start(args, msg);
|
||
|
|
ret = vsnprintf((char *) buf, len, (const char *) msg, args);
|
||
|
|
va_end(args);
|
||
|
|
buf[len - 1] = 0; /* be safe ! */
|
||
|
|
|
||
|
|
return(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlStrVPrintf:
|
||
|
|
* @buf: the result buffer.
|
||
|
|
* @len: the result buffer length.
|
||
|
|
* @msg: the message with printf formatting.
|
||
|
|
* @ap: extra parameters for the message.
|
||
|
|
*
|
||
|
|
* Formats @msg and places result into @buf.
|
||
|
|
*
|
||
|
|
* Returns the number of characters written to @buf or -1 if an error occurs.
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
xmlStrVPrintf(xmlChar *buf, int len, const char *msg, va_list ap) {
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if((buf == NULL) || (msg == NULL)) {
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = vsnprintf((char *) buf, len, (const char *) msg, ap);
|
||
|
|
buf[len - 1] = 0; /* be safe ! */
|
||
|
|
|
||
|
|
return(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
/************************************************************************
|
||
|
|
* *
|
||
|
|
* Generic UTF8 handling routines *
|
||
|
|
* *
|
||
|
|
* From rfc2044: encoding of the Unicode values on UTF-8: *
|
||
|
|
* *
|
||
|
|
* UCS-4 range (hex.) UTF-8 octet sequence (binary) *
|
||
|
|
* 0000 0000-0000 007F 0xxxxxxx *
|
||
|
|
* 0000 0080-0000 07FF 110xxxxx 10xxxxxx *
|
||
|
|
* 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx *
|
||
|
|
* *
|
||
|
|
* I hope we won't use values > 0xFFFF anytime soon ! *
|
||
|
|
* *
|
||
|
|
************************************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlUTF8Size:
|
||
|
|
* @utf: pointer to the UTF8 character
|
||
|
|
*
|
||
|
|
* calculates the internal size of a UTF8 character
|
||
|
|
*
|
||
|
|
* returns the numbers of bytes in the character, -1 on format error
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
xmlUTF8Size(const xmlChar *utf) {
|
||
|
|
xmlChar mask;
|
||
|
|
int len;
|
||
|
|
|
||
|
|
if (utf == NULL)
|
||
|
|
return -1;
|
||
|
|
if (*utf < 0x80)
|
||
|
|
return 1;
|
||
|
|
/* check valid UTF8 character */
|
||
|
|
if (!(*utf & 0x40))
|
||
|
|
return -1;
|
||
|
|
/* determine number of bytes in char */
|
||
|
|
len = 2;
|
||
|
|
for (mask=0x20; mask != 0; mask>>=1) {
|
||
|
|
if (!(*utf & mask))
|
||
|
|
return len;
|
||
|
|
len++;
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlUTF8Charcmp:
|
||
|
|
* @utf1: pointer to first UTF8 char
|
||
|
|
* @utf2: pointer to second UTF8 char
|
||
|
|
*
|
||
|
|
* compares the two UCS4 values
|
||
|
|
*
|
||
|
|
* returns result of the compare as with xmlStrncmp
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
xmlUTF8Charcmp(const xmlChar *utf1, const xmlChar *utf2) {
|
||
|
|
|
||
|
|
if (utf1 == NULL ) {
|
||
|
|
if (utf2 == NULL)
|
||
|
|
return 0;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
return xmlStrncmp(utf1, utf2, xmlUTF8Size(utf1));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlUTF8Strlen:
|
||
|
|
* @utf: a sequence of UTF-8 encoded bytes
|
||
|
|
*
|
||
|
|
* compute the length of an UTF8 string, it doesn't do a full UTF8
|
||
|
|
* checking of the content of the string.
|
||
|
|
*
|
||
|
|
* Returns the number of characters in the string or -1 in case of error
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
xmlUTF8Strlen(const xmlChar *utf) {
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (utf == NULL)
|
||
|
|
return(-1);
|
||
|
|
|
||
|
|
while (*utf != 0) {
|
||
|
|
if (utf[0] & 0x80) {
|
||
|
|
if ((utf[1] & 0xc0) != 0x80)
|
||
|
|
return(-1);
|
||
|
|
if ((utf[0] & 0xe0) == 0xe0) {
|
||
|
|
if ((utf[2] & 0xc0) != 0x80)
|
||
|
|
return(-1);
|
||
|
|
if ((utf[0] & 0xf0) == 0xf0) {
|
||
|
|
if ((utf[0] & 0xf8) != 0xf0 || (utf[3] & 0xc0) != 0x80)
|
||
|
|
return(-1);
|
||
|
|
utf += 4;
|
||
|
|
} else {
|
||
|
|
utf += 3;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
utf += 2;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
utf++;
|
||
|
|
}
|
||
|
|
ret++;
|
||
|
|
}
|
||
|
|
return(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlGetUTF8Char:
|
||
|
|
* @utf: a sequence of UTF-8 encoded bytes
|
||
|
|
* @len: a pointer to the minimum number of bytes present in
|
||
|
|
* the sequence. This is used to assure the next character
|
||
|
|
* is completely contained within the sequence.
|
||
|
|
*
|
||
|
|
* Read the first UTF8 character from @utf
|
||
|
|
*
|
||
|
|
* Returns the char value or -1 in case of error, and sets *len to
|
||
|
|
* the actual number of bytes consumed (0 in case of error)
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
xmlGetUTF8Char(const unsigned char *utf, int *len) {
|
||
|
|
unsigned int c;
|
||
|
|
|
||
|
|
if (utf == NULL)
|
||
|
|
goto error;
|
||
|
|
if (len == NULL)
|
||
|
|
goto error;
|
||
|
|
if (*len < 1)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
c = utf[0];
|
||
|
|
if (c & 0x80) {
|
||
|
|
if (*len < 2)
|
||
|
|
goto error;
|
||
|
|
if ((utf[1] & 0xc0) != 0x80)
|
||
|
|
goto error;
|
||
|
|
if ((c & 0xe0) == 0xe0) {
|
||
|
|
if (*len < 3)
|
||
|
|
goto error;
|
||
|
|
if ((utf[2] & 0xc0) != 0x80)
|
||
|
|
goto error;
|
||
|
|
if ((c & 0xf0) == 0xf0) {
|
||
|
|
if (*len < 4)
|
||
|
|
goto error;
|
||
|
|
if ((c & 0xf8) != 0xf0 || (utf[3] & 0xc0) != 0x80)
|
||
|
|
goto error;
|
||
|
|
*len = 4;
|
||
|
|
/* 4-byte code */
|
||
|
|
c = (utf[0] & 0x7) << 18;
|
||
|
|
c |= (utf[1] & 0x3f) << 12;
|
||
|
|
c |= (utf[2] & 0x3f) << 6;
|
||
|
|
c |= utf[3] & 0x3f;
|
||
|
|
} else {
|
||
|
|
/* 3-byte code */
|
||
|
|
*len = 3;
|
||
|
|
c = (utf[0] & 0xf) << 12;
|
||
|
|
c |= (utf[1] & 0x3f) << 6;
|
||
|
|
c |= utf[2] & 0x3f;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* 2-byte code */
|
||
|
|
*len = 2;
|
||
|
|
c = (utf[0] & 0x1f) << 6;
|
||
|
|
c |= utf[1] & 0x3f;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* 1-byte code */
|
||
|
|
*len = 1;
|
||
|
|
}
|
||
|
|
return(c);
|
||
|
|
|
||
|
|
error:
|
||
|
|
if (len != NULL)
|
||
|
|
*len = 0;
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlCheckUTF8:
|
||
|
|
* @utf: Pointer to putative UTF-8 encoded string.
|
||
|
|
*
|
||
|
|
* Checks @utf for being valid UTF-8. @utf is assumed to be
|
||
|
|
* null-terminated. This function is not super-strict, as it will
|
||
|
|
* allow longer UTF-8 sequences than necessary. Note that Java is
|
||
|
|
* capable of producing these sequences if provoked. Also note, this
|
||
|
|
* routine checks for the 4-byte maximum size, but does not check for
|
||
|
|
* 0x10ffff maximum value.
|
||
|
|
*
|
||
|
|
* Return value: true if @utf is valid.
|
||
|
|
**/
|
||
|
|
int
|
||
|
|
xmlCheckUTF8(const unsigned char *utf)
|
||
|
|
{
|
||
|
|
int ix;
|
||
|
|
unsigned char c;
|
||
|
|
|
||
|
|
if (utf == NULL)
|
||
|
|
return(0);
|
||
|
|
/*
|
||
|
|
* utf is a string of 1, 2, 3 or 4 bytes. The valid strings
|
||
|
|
* are as follows (in "bit format"):
|
||
|
|
* 0xxxxxxx valid 1-byte
|
||
|
|
* 110xxxxx 10xxxxxx valid 2-byte
|
||
|
|
* 1110xxxx 10xxxxxx 10xxxxxx valid 3-byte
|
||
|
|
* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx valid 4-byte
|
||
|
|
*/
|
||
|
|
for (ix = 0; (c = utf[ix]);) { /* string is 0-terminated */
|
||
|
|
if ((c & 0x80) == 0x00) { /* 1-byte code, starts with 10 */
|
||
|
|
ix++;
|
||
|
|
} else if ((c & 0xe0) == 0xc0) {/* 2-byte code, starts with 110 */
|
||
|
|
if ((utf[ix+1] & 0xc0 ) != 0x80)
|
||
|
|
return 0;
|
||
|
|
ix += 2;
|
||
|
|
} else if ((c & 0xf0) == 0xe0) {/* 3-byte code, starts with 1110 */
|
||
|
|
if (((utf[ix+1] & 0xc0) != 0x80) ||
|
||
|
|
((utf[ix+2] & 0xc0) != 0x80))
|
||
|
|
return 0;
|
||
|
|
ix += 3;
|
||
|
|
} else if ((c & 0xf8) == 0xf0) {/* 4-byte code, starts with 11110 */
|
||
|
|
if (((utf[ix+1] & 0xc0) != 0x80) ||
|
||
|
|
((utf[ix+2] & 0xc0) != 0x80) ||
|
||
|
|
((utf[ix+3] & 0xc0) != 0x80))
|
||
|
|
return 0;
|
||
|
|
ix += 4;
|
||
|
|
} else /* unknown encoding */
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
return(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlUTF8Strsize:
|
||
|
|
* @utf: a sequence of UTF-8 encoded bytes
|
||
|
|
* @len: the number of characters in the array
|
||
|
|
*
|
||
|
|
* storage size of an UTF8 string
|
||
|
|
* the behaviour is not guaranteed if the input string is not UTF-8
|
||
|
|
*
|
||
|
|
* Returns the storage size of
|
||
|
|
* the first 'len' characters of ARRAY
|
||
|
|
*/
|
||
|
|
|
||
|
|
int
|
||
|
|
xmlUTF8Strsize(const xmlChar *utf, int len) {
|
||
|
|
const xmlChar *ptr=utf;
|
||
|
|
xmlChar ch;
|
||
|
|
|
||
|
|
if (utf == NULL)
|
||
|
|
return(0);
|
||
|
|
|
||
|
|
if (len <= 0)
|
||
|
|
return(0);
|
||
|
|
|
||
|
|
while ( len-- > 0) {
|
||
|
|
if ( !*ptr )
|
||
|
|
break;
|
||
|
|
if ( (ch = *ptr++) & 0x80)
|
||
|
|
while ((ch<<=1) & 0x80 ) {
|
||
|
|
if (*ptr == 0) break;
|
||
|
|
ptr++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return (ptr - utf);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlUTF8Strndup:
|
||
|
|
* @utf: the input UTF8 *
|
||
|
|
* @len: the len of @utf (in chars)
|
||
|
|
*
|
||
|
|
* a strndup for array of UTF8's
|
||
|
|
*
|
||
|
|
* Returns a new UTF8 * or NULL
|
||
|
|
*/
|
||
|
|
xmlChar *
|
||
|
|
xmlUTF8Strndup(const xmlChar *utf, int len) {
|
||
|
|
xmlChar *ret;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if ((utf == NULL) || (len < 0)) return(NULL);
|
||
|
|
i = xmlUTF8Strsize(utf, len);
|
||
|
|
ret = (xmlChar *) xmlMallocAtomic((i + 1) * sizeof(xmlChar));
|
||
|
|
if (ret == NULL) {
|
||
|
|
xmlGenericError(xmlGenericErrorContext,
|
||
|
|
"malloc of %ld byte failed\n",
|
||
|
|
(len + 1) * (long)sizeof(xmlChar));
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
memcpy(ret, utf, i * sizeof(xmlChar));
|
||
|
|
ret[i] = 0;
|
||
|
|
return(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlUTF8Strpos:
|
||
|
|
* @utf: the input UTF8 *
|
||
|
|
* @pos: the position of the desired UTF8 char (in chars)
|
||
|
|
*
|
||
|
|
* a function to provide the equivalent of fetching a
|
||
|
|
* character from a string array
|
||
|
|
*
|
||
|
|
* Returns a pointer to the UTF8 character or NULL
|
||
|
|
*/
|
||
|
|
const xmlChar *
|
||
|
|
xmlUTF8Strpos(const xmlChar *utf, int pos) {
|
||
|
|
xmlChar ch;
|
||
|
|
|
||
|
|
if (utf == NULL) return(NULL);
|
||
|
|
if (pos < 0)
|
||
|
|
return(NULL);
|
||
|
|
while (pos--) {
|
||
|
|
if ((ch=*utf++) == 0) return(NULL);
|
||
|
|
if ( ch & 0x80 ) {
|
||
|
|
/* if not simple ascii, verify proper format */
|
||
|
|
if ( (ch & 0xc0) != 0xc0 )
|
||
|
|
return(NULL);
|
||
|
|
/* then skip over remaining bytes for this char */
|
||
|
|
while ( (ch <<= 1) & 0x80 )
|
||
|
|
if ( (*utf++ & 0xc0) != 0x80 )
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return((xmlChar *)utf);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlUTF8Strloc:
|
||
|
|
* @utf: the input UTF8 *
|
||
|
|
* @utfchar: the UTF8 character to be found
|
||
|
|
*
|
||
|
|
* a function to provide the relative location of a UTF8 char
|
||
|
|
*
|
||
|
|
* Returns the relative character position of the desired char
|
||
|
|
* or -1 if not found
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
xmlUTF8Strloc(const xmlChar *utf, const xmlChar *utfchar) {
|
||
|
|
int i, size;
|
||
|
|
xmlChar ch;
|
||
|
|
|
||
|
|
if (utf==NULL || utfchar==NULL) return -1;
|
||
|
|
size = xmlUTF8Strsize(utfchar, 1);
|
||
|
|
for(i=0; (ch=*utf) != 0; i++) {
|
||
|
|
if (xmlStrncmp(utf, utfchar, size)==0)
|
||
|
|
return(i);
|
||
|
|
utf++;
|
||
|
|
if ( ch & 0x80 ) {
|
||
|
|
/* if not simple ascii, verify proper format */
|
||
|
|
if ( (ch & 0xc0) != 0xc0 )
|
||
|
|
return(-1);
|
||
|
|
/* then skip over remaining bytes for this char */
|
||
|
|
while ( (ch <<= 1) & 0x80 )
|
||
|
|
if ( (*utf++ & 0xc0) != 0x80 )
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return(-1);
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* xmlUTF8Strsub:
|
||
|
|
* @utf: a sequence of UTF-8 encoded bytes
|
||
|
|
* @start: relative pos of first char
|
||
|
|
* @len: total number to copy
|
||
|
|
*
|
||
|
|
* Create a substring from a given UTF-8 string
|
||
|
|
* Note: positions are given in units of UTF-8 chars
|
||
|
|
*
|
||
|
|
* Returns a pointer to a newly created string
|
||
|
|
* or NULL if any problem
|
||
|
|
*/
|
||
|
|
|
||
|
|
xmlChar *
|
||
|
|
xmlUTF8Strsub(const xmlChar *utf, int start, int len) {
|
||
|
|
int i;
|
||
|
|
xmlChar ch;
|
||
|
|
|
||
|
|
if (utf == NULL) return(NULL);
|
||
|
|
if (start < 0) return(NULL);
|
||
|
|
if (len < 0) return(NULL);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Skip over any leading chars
|
||
|
|
*/
|
||
|
|
for (i = 0;i < start;i++) {
|
||
|
|
if ((ch=*utf++) == 0) return(NULL);
|
||
|
|
if ( ch & 0x80 ) {
|
||
|
|
/* if not simple ascii, verify proper format */
|
||
|
|
if ( (ch & 0xc0) != 0xc0 )
|
||
|
|
return(NULL);
|
||
|
|
/* then skip over remaining bytes for this char */
|
||
|
|
while ( (ch <<= 1) & 0x80 )
|
||
|
|
if ( (*utf++ & 0xc0) != 0x80 )
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return(xmlUTF8Strndup(utf, len));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* xmlEscapeFormatString:
|
||
|
|
* @msg: a pointer to the string in which to escape '%' characters.
|
||
|
|
* Must be a heap-allocated buffer created by libxml2 that may be
|
||
|
|
* returned, or that may be freed and replaced.
|
||
|
|
*
|
||
|
|
* Replaces the string pointed to by 'msg' with an escaped string.
|
||
|
|
* Returns the same string with all '%' characters escaped.
|
||
|
|
*/
|
||
|
|
xmlChar *
|
||
|
|
xmlEscapeFormatString(xmlChar **msg)
|
||
|
|
{
|
||
|
|
xmlChar *msgPtr = NULL;
|
||
|
|
xmlChar *result = NULL;
|
||
|
|
xmlChar *resultPtr = NULL;
|
||
|
|
size_t count = 0;
|
||
|
|
size_t msgLen = 0;
|
||
|
|
size_t resultLen = 0;
|
||
|
|
|
||
|
|
if (!msg || !*msg)
|
||
|
|
return(NULL);
|
||
|
|
|
||
|
|
for (msgPtr = *msg; *msgPtr != '\0'; ++msgPtr) {
|
||
|
|
++msgLen;
|
||
|
|
if (*msgPtr == '%')
|
||
|
|
++count;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (count == 0)
|
||
|
|
return(*msg);
|
||
|
|
|
||
|
|
resultLen = msgLen + count + 1;
|
||
|
|
result = (xmlChar *) xmlMallocAtomic(resultLen * sizeof(xmlChar));
|
||
|
|
if (result == NULL) {
|
||
|
|
/* Clear *msg to prevent format string vulnerabilities in
|
||
|
|
out-of-memory situations. */
|
||
|
|
xmlFree(*msg);
|
||
|
|
*msg = NULL;
|
||
|
|
xmlErrMemory(NULL, NULL);
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (msgPtr = *msg, resultPtr = result; *msgPtr != '\0'; ++msgPtr, ++resultPtr) {
|
||
|
|
*resultPtr = *msgPtr;
|
||
|
|
if (*msgPtr == '%')
|
||
|
|
*(++resultPtr) = '%';
|
||
|
|
}
|
||
|
|
result[resultLen - 1] = '\0';
|
||
|
|
|
||
|
|
xmlFree(*msg);
|
||
|
|
*msg = result;
|
||
|
|
|
||
|
|
return *msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define bottom_xmlstring
|
||
|
|
#include "elfgcchack.h"
|