diff options
Diffstat (limited to 'external/libxml2_android/jni/libxml2/buf.c')
-rw-r--r-- | external/libxml2_android/jni/libxml2/buf.c | 1345 |
1 files changed, 0 insertions, 1345 deletions
diff --git a/external/libxml2_android/jni/libxml2/buf.c b/external/libxml2_android/jni/libxml2/buf.c deleted file mode 100644 index 07922ff6..00000000 --- a/external/libxml2_android/jni/libxml2/buf.c +++ /dev/null @@ -1,1345 +0,0 @@ -/* - * buf.c: memory buffers for libxml2 - * - * new buffer structures and entry points to simplify the maintainance - * of libxml2 and ensure we keep good control over memory allocations - * and stay 64 bits clean. - * The new entry point use the xmlBufPtr opaque structure and - * xmlBuf...() counterparts to the old xmlBuf...() functions - * - * See Copyright for the status of this software. - * - * daniel@veillard.com - */ - -#define IN_LIBXML -#include "libxml.h" - -#include <string.h> /* for memset() only ! */ -#include <limits.h> -#ifdef HAVE_CTYPE_H -#include <ctype.h> -#endif -#ifdef HAVE_STDLIB_H -#include <stdlib.h> -#endif - -#include <libxml/tree.h> -#include <libxml/globals.h> -#include <libxml/tree.h> -#include <libxml/parserInternals.h> /* for XML_MAX_TEXT_LENGTH */ -#include "buf.h" - -#define WITH_BUFFER_COMPAT - -/** - * xmlBuf: - * - * A buffer structure. The base of the structure is somehow compatible - * with struct _xmlBuffer to limit risks on application which accessed - * directly the input->buf->buffer structures. - */ - -struct _xmlBuf { - xmlChar *content; /* The buffer content UTF8 */ - unsigned int compat_use; /* for binary compatibility */ - unsigned int compat_size; /* for binary compatibility */ - xmlBufferAllocationScheme alloc; /* The realloc method */ - xmlChar *contentIO; /* in IO mode we may have a different base */ - size_t use; /* The buffer size used */ - size_t size; /* The buffer size */ - xmlBufferPtr buffer; /* wrapper for an old buffer */ - int error; /* an error code if a failure occured */ -}; - -#ifdef WITH_BUFFER_COMPAT -/* - * Macro for compatibility with xmlBuffer to be used after an xmlBuf - * is updated. This makes sure the compat fields are updated too. - */ -#define UPDATE_COMPAT(buf) \ - if (buf->size < INT_MAX) buf->compat_size = buf->size; \ - else buf->compat_size = INT_MAX; \ - if (buf->use < INT_MAX) buf->compat_use = buf->use; \ - else buf->compat_use = INT_MAX; - -/* - * Macro for compatibility with xmlBuffer to be used in all the xmlBuf - * entry points, it checks that the compat fields have not been modified - * by direct call to xmlBuffer function from code compiled before 2.9.0 . - */ -#define CHECK_COMPAT(buf) \ - if (buf->size != (size_t) buf->compat_size) \ - if (buf->compat_size < INT_MAX) \ - buf->size = buf->compat_size; \ - if (buf->use != (size_t) buf->compat_use) \ - if (buf->compat_use < INT_MAX) \ - buf->use = buf->compat_use; - -#else /* ! WITH_BUFFER_COMPAT */ -#define UPDATE_COMPAT(buf) -#define CHECK_COMPAT(buf) -#endif /* WITH_BUFFER_COMPAT */ - -/** - * xmlBufMemoryError: - * @extra: extra informations - * - * Handle an out of memory condition - * To be improved... - */ -static void -xmlBufMemoryError(xmlBufPtr buf, const char *extra) -{ - __xmlSimpleError(XML_FROM_BUFFER, XML_ERR_NO_MEMORY, NULL, NULL, extra); - if ((buf) && (buf->error == 0)) - buf->error = XML_ERR_NO_MEMORY; -} - -/** - * xmlBufOverflowError: - * @extra: extra informations - * - * Handle a buffer overflow error - * To be improved... - */ -static void -xmlBufOverflowError(xmlBufPtr buf, const char *extra) -{ - __xmlSimpleError(XML_FROM_BUFFER, XML_BUF_OVERFLOW, NULL, NULL, extra); - if ((buf) && (buf->error == 0)) - buf->error = XML_BUF_OVERFLOW; -} - - -/** - * xmlBufCreate: - * - * routine to create an XML buffer. - * returns the new structure. - */ -xmlBufPtr -xmlBufCreate(void) { - xmlBufPtr ret; - - ret = (xmlBufPtr) xmlMalloc(sizeof(xmlBuf)); - if (ret == NULL) { - xmlBufMemoryError(NULL, "creating buffer"); - return(NULL); - } - ret->compat_use = 0; - ret->use = 0; - ret->error = 0; - ret->buffer = NULL; - ret->size = xmlDefaultBufferSize; - ret->compat_size = xmlDefaultBufferSize; - ret->alloc = xmlBufferAllocScheme; - ret->content = (xmlChar *) xmlMallocAtomic(ret->size * sizeof(xmlChar)); - if (ret->content == NULL) { - xmlBufMemoryError(ret, "creating buffer"); - xmlFree(ret); - return(NULL); - } - ret->content[0] = 0; - ret->contentIO = NULL; - return(ret); -} - -/** - * xmlBufCreateSize: - * @size: initial size of buffer - * - * routine to create an XML buffer. - * returns the new structure. - */ -xmlBufPtr -xmlBufCreateSize(size_t size) { - xmlBufPtr ret; - - ret = (xmlBufPtr) xmlMalloc(sizeof(xmlBuf)); - if (ret == NULL) { - xmlBufMemoryError(NULL, "creating buffer"); - return(NULL); - } - ret->compat_use = 0; - ret->use = 0; - ret->error = 0; - ret->buffer = NULL; - ret->alloc = xmlBufferAllocScheme; - ret->size = (size ? size+2 : 0); /* +1 for ending null */ - ret->compat_size = (int) ret->size; - if (ret->size){ - ret->content = (xmlChar *) xmlMallocAtomic(ret->size * sizeof(xmlChar)); - if (ret->content == NULL) { - xmlBufMemoryError(ret, "creating buffer"); - xmlFree(ret); - return(NULL); - } - ret->content[0] = 0; - } else - ret->content = NULL; - ret->contentIO = NULL; - return(ret); -} - -/** - * xmlBufDetach: - * @buf: the buffer - * - * Remove the string contained in a buffer and give it back to the - * caller. The buffer is reset to an empty content. - * This doesn't work with immutable buffers as they can't be reset. - * - * Returns the previous string contained by the buffer. - */ -xmlChar * -xmlBufDetach(xmlBufPtr buf) { - xmlChar *ret; - - if (buf == NULL) - return(NULL); - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) - return(NULL); - if (buf->buffer != NULL) - return(NULL); - if (buf->error) - return(NULL); - - ret = buf->content; - buf->content = NULL; - buf->size = 0; - buf->use = 0; - buf->compat_use = 0; - buf->compat_size = 0; - - return ret; -} - - -/** - * xmlBufCreateStatic: - * @mem: the memory area - * @size: the size in byte - * - * routine to create an XML buffer from an immutable memory area. - * The area won't be modified nor copied, and is expected to be - * present until the end of the buffer lifetime. - * - * returns the new structure. - */ -xmlBufPtr -xmlBufCreateStatic(void *mem, size_t size) { - xmlBufPtr ret; - - if ((mem == NULL) || (size == 0)) - return(NULL); - - ret = (xmlBufPtr) xmlMalloc(sizeof(xmlBuf)); - if (ret == NULL) { - xmlBufMemoryError(NULL, "creating buffer"); - return(NULL); - } - if (size < INT_MAX) { - ret->compat_use = size; - ret->compat_size = size; - } else { - ret->compat_use = INT_MAX; - ret->compat_size = INT_MAX; - } - ret->use = size; - ret->size = size; - ret->alloc = XML_BUFFER_ALLOC_IMMUTABLE; - ret->content = (xmlChar *) mem; - ret->error = 0; - ret->buffer = NULL; - return(ret); -} - -/** - * xmlBufGetAllocationScheme: - * @buf: the buffer - * - * Get the buffer allocation scheme - * - * Returns the scheme or -1 in case of error - */ -int -xmlBufGetAllocationScheme(xmlBufPtr buf) { - if (buf == NULL) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufGetAllocationScheme: buf == NULL\n"); -#endif - return(-1); - } - return(buf->alloc); -} - -/** - * xmlBufSetAllocationScheme: - * @buf: the buffer to tune - * @scheme: allocation scheme to use - * - * Sets the allocation scheme for this buffer - * - * returns 0 in case of success and -1 in case of failure - */ -int -xmlBufSetAllocationScheme(xmlBufPtr buf, - xmlBufferAllocationScheme scheme) { - if ((buf == NULL) || (buf->error != 0)) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufSetAllocationScheme: buf == NULL or in error\n"); -#endif - return(-1); - } - if ((buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) || - (buf->alloc == XML_BUFFER_ALLOC_IO)) - return(-1); - if ((scheme == XML_BUFFER_ALLOC_DOUBLEIT) || - (scheme == XML_BUFFER_ALLOC_EXACT) || - (scheme == XML_BUFFER_ALLOC_HYBRID) || - (scheme == XML_BUFFER_ALLOC_IMMUTABLE) || - (scheme == XML_BUFFER_ALLOC_BOUNDED)) { - buf->alloc = scheme; - if (buf->buffer) - buf->buffer->alloc = scheme; - return(0); - } - /* - * Switching a buffer ALLOC_IO has the side effect of initializing - * the contentIO field with the current content - */ - if (scheme == XML_BUFFER_ALLOC_IO) { - buf->alloc = XML_BUFFER_ALLOC_IO; - buf->contentIO = buf->content; - } - return(-1); -} - -/** - * xmlBufFree: - * @buf: the buffer to free - * - * Frees an XML buffer. It frees both the content and the structure which - * encapsulate it. - */ -void -xmlBufFree(xmlBufPtr buf) { - if (buf == NULL) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufFree: buf == NULL\n"); -#endif - return; - } - - if ((buf->alloc == XML_BUFFER_ALLOC_IO) && - (buf->contentIO != NULL)) { - xmlFree(buf->contentIO); - } else if ((buf->content != NULL) && - (buf->alloc != XML_BUFFER_ALLOC_IMMUTABLE)) { - xmlFree(buf->content); - } - xmlFree(buf); -} - -/** - * xmlBufEmpty: - * @buf: the buffer - * - * empty a buffer. - */ -void -xmlBufEmpty(xmlBufPtr buf) { - if ((buf == NULL) || (buf->error != 0)) return; - if (buf->content == NULL) return; - CHECK_COMPAT(buf) - buf->use = 0; - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) { - buf->content = BAD_CAST ""; - } else if ((buf->alloc == XML_BUFFER_ALLOC_IO) && - (buf->contentIO != NULL)) { - size_t start_buf = buf->content - buf->contentIO; - - buf->size += start_buf; - buf->content = buf->contentIO; - buf->content[0] = 0; - } else { - buf->content[0] = 0; - } - UPDATE_COMPAT(buf) -} - -/** - * xmlBufShrink: - * @buf: the buffer to dump - * @len: the number of xmlChar to remove - * - * Remove the beginning of an XML buffer. - * NOTE that this routine behaviour differs from xmlBufferShrink() - * as it will return 0 on error instead of -1 due to size_t being - * used as the return type. - * - * Returns the number of byte removed or 0 in case of failure - */ -size_t -xmlBufShrink(xmlBufPtr buf, size_t len) { - if ((buf == NULL) || (buf->error != 0)) return(0); - CHECK_COMPAT(buf) - if (len == 0) return(0); - if (len > buf->use) return(0); - - buf->use -= len; - if ((buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) || - ((buf->alloc == XML_BUFFER_ALLOC_IO) && (buf->contentIO != NULL))) { - /* - * we just move the content pointer, but also make sure - * the perceived buffer size has shrinked accordingly - */ - buf->content += len; - buf->size -= len; - - /* - * sometimes though it maybe be better to really shrink - * on IO buffers - */ - if ((buf->alloc == XML_BUFFER_ALLOC_IO) && (buf->contentIO != NULL)) { - size_t start_buf = buf->content - buf->contentIO; - if (start_buf >= buf->size) { - memmove(buf->contentIO, &buf->content[0], buf->use); - buf->content = buf->contentIO; - buf->content[buf->use] = 0; - buf->size += start_buf; - } - } - } else { - memmove(buf->content, &buf->content[len], buf->use); - buf->content[buf->use] = 0; - } - UPDATE_COMPAT(buf) - return(len); -} - -/** - * xmlBufGrowInternal: - * @buf: the buffer - * @len: the minimum free size to allocate - * - * Grow the available space of an XML buffer, @len is the target value - * Error checking should be done on buf->error since using the return - * value doesn't work that well - * - * Returns 0 in case of error or the length made available otherwise - */ -static size_t -xmlBufGrowInternal(xmlBufPtr buf, size_t len) { - size_t size; - xmlChar *newbuf; - - if ((buf == NULL) || (buf->error != 0)) return(0); - CHECK_COMPAT(buf) - - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) return(0); - if (buf->use + len < buf->size) - return(buf->size - buf->use); - - /* - * Windows has a BIG problem on realloc timing, so we try to double - * the buffer size (if that's enough) (bug 146697) - * Apparently BSD too, and it's probably best for linux too - * On an embedded system this may be something to change - */ -#if 1 - if (buf->size > (size_t) len) - size = buf->size * 2; - else - size = buf->use + len + 100; -#else - size = buf->use + len + 100; -#endif - - if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) { - /* - * Used to provide parsing limits - */ - if ((buf->use + len >= XML_MAX_TEXT_LENGTH) || - (buf->size >= XML_MAX_TEXT_LENGTH)) { - xmlBufMemoryError(buf, "buffer error: text too long\n"); - return(0); - } - if (size >= XML_MAX_TEXT_LENGTH) - size = XML_MAX_TEXT_LENGTH; - } - if ((buf->alloc == XML_BUFFER_ALLOC_IO) && (buf->contentIO != NULL)) { - size_t start_buf = buf->content - buf->contentIO; - - newbuf = (xmlChar *) xmlRealloc(buf->contentIO, start_buf + size); - if (newbuf == NULL) { - xmlBufMemoryError(buf, "growing buffer"); - return(0); - } - buf->contentIO = newbuf; - buf->content = newbuf + start_buf; - } else { - newbuf = (xmlChar *) xmlRealloc(buf->content, size); - if (newbuf == NULL) { - xmlBufMemoryError(buf, "growing buffer"); - return(0); - } - buf->content = newbuf; - } - buf->size = size; - UPDATE_COMPAT(buf) - return(buf->size - buf->use); -} - -/** - * xmlBufGrow: - * @buf: the buffer - * @len: the minimum free size to allocate - * - * Grow the available space of an XML buffer, @len is the target value - * This is been kept compatible with xmlBufferGrow() as much as possible - * - * Returns -1 in case of error or the length made available otherwise - */ -int -xmlBufGrow(xmlBufPtr buf, int len) { - size_t ret; - - if ((buf == NULL) || (len < 0)) return(-1); - if (len == 0) - return(0); - ret = xmlBufGrowInternal(buf, len); - if (buf->error != 0) - return(-1); - return((int) ret); -} - -/** - * xmlBufInflate: - * @buf: the buffer - * @len: the minimum extra free size to allocate - * - * Grow the available space of an XML buffer, adding at least @len bytes - * - * Returns 0 if successful or -1 in case of error - */ -int -xmlBufInflate(xmlBufPtr buf, size_t len) { - if (buf == NULL) return(-1); - xmlBufGrowInternal(buf, len + buf->size); - if (buf->error) - return(-1); - return(0); -} - -/** - * xmlBufDump: - * @file: the file output - * @buf: the buffer to dump - * - * Dumps an XML buffer to a FILE *. - * Returns the number of #xmlChar written - */ -size_t -xmlBufDump(FILE *file, xmlBufPtr buf) { - size_t ret; - - if ((buf == NULL) || (buf->error != 0)) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufDump: buf == NULL or in error\n"); -#endif - return(0); - } - if (buf->content == NULL) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufDump: buf->content == NULL\n"); -#endif - return(0); - } - CHECK_COMPAT(buf) - if (file == NULL) - file = stdout; - ret = fwrite(buf->content, sizeof(xmlChar), buf->use, file); - return(ret); -} - -/** - * xmlBufContent: - * @buf: the buffer - * - * Function to extract the content of a buffer - * - * Returns the internal content - */ - -xmlChar * -xmlBufContent(const xmlBuf *buf) -{ - if ((!buf) || (buf->error)) - return NULL; - - return(buf->content); -} - -/** - * xmlBufEnd: - * @buf: the buffer - * - * Function to extract the end of the content of a buffer - * - * Returns the end of the internal content or NULL in case of error - */ - -xmlChar * -xmlBufEnd(xmlBufPtr buf) -{ - if ((!buf) || (buf->error)) - return NULL; - CHECK_COMPAT(buf) - - return(&buf->content[buf->use]); -} - -/** - * xmlBufAddLen: - * @buf: the buffer - * @len: the size which were added at the end - * - * Sometime data may be added at the end of the buffer without - * using the xmlBuf APIs that is used to expand the used space - * and set the zero terminating at the end of the buffer - * - * Returns -1 in case of error and 0 otherwise - */ -int -xmlBufAddLen(xmlBufPtr buf, size_t len) { - if ((buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - if (len > (buf->size - buf->use)) - return(-1); - buf->use += len; - UPDATE_COMPAT(buf) - if (buf->size > buf->use) - buf->content[buf->use] = 0; - else - return(-1); - return(0); -} - -/** - * xmlBufErase: - * @buf: the buffer - * @len: the size to erase at the end - * - * Sometime data need to be erased at the end of the buffer - * - * Returns -1 in case of error and 0 otherwise - */ -int -xmlBufErase(xmlBufPtr buf, size_t len) { - if ((buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - if (len > buf->use) - return(-1); - buf->use -= len; - buf->content[buf->use] = 0; - UPDATE_COMPAT(buf) - return(0); -} - -/** - * xmlBufLength: - * @buf: the buffer - * - * Function to get the length of a buffer - * - * Returns the length of data in the internal content - */ - -size_t -xmlBufLength(const xmlBufPtr buf) -{ - if ((!buf) || (buf->error)) - return 0; - CHECK_COMPAT(buf) - - return(buf->use); -} - -/** - * xmlBufUse: - * @buf: the buffer - * - * Function to get the length of a buffer - * - * Returns the length of data in the internal content - */ - -size_t -xmlBufUse(const xmlBufPtr buf) -{ - if ((!buf) || (buf->error)) - return 0; - CHECK_COMPAT(buf) - - return(buf->use); -} - -/** - * xmlBufAvail: - * @buf: the buffer - * - * Function to find how much free space is allocated but not - * used in the buffer. It does not account for the terminating zero - * usually needed - * - * Returns the amount or 0 if none or an error occured - */ - -size_t -xmlBufAvail(const xmlBufPtr buf) -{ - if ((!buf) || (buf->error)) - return 0; - CHECK_COMPAT(buf) - - return(buf->size - buf->use); -} - -/** - * xmlBufIsEmpty: - * @buf: the buffer - * - * Tell if a buffer is empty - * - * Returns 0 if no, 1 if yes and -1 in case of error - */ -int -xmlBufIsEmpty(const xmlBufPtr buf) -{ - if ((!buf) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - - return(buf->use == 0); -} - -/** - * xmlBufResize: - * @buf: the buffer to resize - * @size: the desired size - * - * Resize a buffer to accommodate minimum size of @size. - * - * Returns 0 in case of problems, 1 otherwise - */ -int -xmlBufResize(xmlBufPtr buf, size_t size) -{ - unsigned int newSize; - xmlChar* rebuf = NULL; - size_t start_buf; - - if ((buf == NULL) || (buf->error)) - return(0); - CHECK_COMPAT(buf) - - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) return(0); - if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) { - /* - * Used to provide parsing limits - */ - if (size >= XML_MAX_TEXT_LENGTH) { - xmlBufMemoryError(buf, "buffer error: text too long\n"); - return(0); - } - } - - /* Don't resize if we don't have to */ - if (size < buf->size) - return 1; - - /* figure out new size */ - switch (buf->alloc){ - case XML_BUFFER_ALLOC_IO: - case XML_BUFFER_ALLOC_DOUBLEIT: - /*take care of empty case*/ - newSize = (buf->size ? buf->size*2 : size + 10); - while (size > newSize) { - if (newSize > UINT_MAX / 2) { - xmlBufMemoryError(buf, "growing buffer"); - return 0; - } - newSize *= 2; - } - break; - case XML_BUFFER_ALLOC_EXACT: - newSize = size+10; - break; - case XML_BUFFER_ALLOC_HYBRID: - if (buf->use < BASE_BUFFER_SIZE) - newSize = size; - else { - newSize = buf->size * 2; - while (size > newSize) { - if (newSize > UINT_MAX / 2) { - xmlBufMemoryError(buf, "growing buffer"); - return 0; - } - newSize *= 2; - } - } - break; - - default: - newSize = size+10; - break; - } - - if ((buf->alloc == XML_BUFFER_ALLOC_IO) && (buf->contentIO != NULL)) { - start_buf = buf->content - buf->contentIO; - - if (start_buf > newSize) { - /* move data back to start */ - memmove(buf->contentIO, buf->content, buf->use); - buf->content = buf->contentIO; - buf->content[buf->use] = 0; - buf->size += start_buf; - } else { - rebuf = (xmlChar *) xmlRealloc(buf->contentIO, start_buf + newSize); - if (rebuf == NULL) { - xmlBufMemoryError(buf, "growing buffer"); - return 0; - } - buf->contentIO = rebuf; - buf->content = rebuf + start_buf; - } - } else { - if (buf->content == NULL) { - rebuf = (xmlChar *) xmlMallocAtomic(newSize); - } else if (buf->size - buf->use < 100) { - rebuf = (xmlChar *) xmlRealloc(buf->content, newSize); - } else { - /* - * if we are reallocating a buffer far from being full, it's - * better to make a new allocation and copy only the used range - * and free the old one. - */ - rebuf = (xmlChar *) xmlMallocAtomic(newSize); - if (rebuf != NULL) { - memcpy(rebuf, buf->content, buf->use); - xmlFree(buf->content); - rebuf[buf->use] = 0; - } - } - if (rebuf == NULL) { - xmlBufMemoryError(buf, "growing buffer"); - return 0; - } - buf->content = rebuf; - } - buf->size = newSize; - UPDATE_COMPAT(buf) - - return 1; -} - -/** - * xmlBufAdd: - * @buf: the buffer to dump - * @str: the #xmlChar string - * @len: the number of #xmlChar to add - * - * Add a string range to an XML buffer. if len == -1, the length of - * str is recomputed. - * - * Returns 0 successful, a positive error code number otherwise - * and -1 in case of internal or API error. - */ -int -xmlBufAdd(xmlBufPtr buf, const xmlChar *str, int len) { - unsigned int needSize; - - if ((str == NULL) || (buf == NULL) || (buf->error)) - return -1; - CHECK_COMPAT(buf) - - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) return -1; - if (len < -1) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufAdd: len < 0\n"); -#endif - return -1; - } - if (len == 0) return 0; - - if (len < 0) - len = xmlStrlen(str); - - if (len < 0) return -1; - if (len == 0) return 0; - - needSize = buf->use + len + 2; - if (needSize > buf->size){ - if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) { - /* - * Used to provide parsing limits - */ - if (needSize >= XML_MAX_TEXT_LENGTH) { - xmlBufMemoryError(buf, "buffer error: text too long\n"); - return(-1); - } - } - if (!xmlBufResize(buf, needSize)){ - xmlBufMemoryError(buf, "growing buffer"); - return XML_ERR_NO_MEMORY; - } - } - - memmove(&buf->content[buf->use], str, len*sizeof(xmlChar)); - buf->use += len; - buf->content[buf->use] = 0; - UPDATE_COMPAT(buf) - return 0; -} - -/** - * xmlBufAddHead: - * @buf: the buffer - * @str: the #xmlChar string - * @len: the number of #xmlChar to add - * - * Add a string range to the beginning of an XML buffer. - * if len == -1, the length of @str is recomputed. - * - * Returns 0 successful, a positive error code number otherwise - * and -1 in case of internal or API error. - */ -int -xmlBufAddHead(xmlBufPtr buf, const xmlChar *str, int len) { - unsigned int needSize; - - if ((buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) return -1; - if (str == NULL) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufAddHead: str == NULL\n"); -#endif - return -1; - } - if (len < -1) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufAddHead: len < 0\n"); -#endif - return -1; - } - if (len == 0) return 0; - - if (len < 0) - len = xmlStrlen(str); - - if (len <= 0) return -1; - - if ((buf->alloc == XML_BUFFER_ALLOC_IO) && (buf->contentIO != NULL)) { - size_t start_buf = buf->content - buf->contentIO; - - if (start_buf > (unsigned int) len) { - /* - * We can add it in the space previously shrinked - */ - buf->content -= len; - memmove(&buf->content[0], str, len); - buf->use += len; - buf->size += len; - UPDATE_COMPAT(buf) - return(0); - } - } - needSize = buf->use + len + 2; - if (needSize > buf->size){ - if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) { - /* - * Used to provide parsing limits - */ - if (needSize >= XML_MAX_TEXT_LENGTH) { - xmlBufMemoryError(buf, "buffer error: text too long\n"); - return(-1); - } - } - if (!xmlBufResize(buf, needSize)){ - xmlBufMemoryError(buf, "growing buffer"); - return XML_ERR_NO_MEMORY; - } - } - - memmove(&buf->content[len], &buf->content[0], buf->use); - memmove(&buf->content[0], str, len); - buf->use += len; - buf->content[buf->use] = 0; - UPDATE_COMPAT(buf) - return 0; -} - -/** - * xmlBufCat: - * @buf: the buffer to add to - * @str: the #xmlChar string - * - * Append a zero terminated string to an XML buffer. - * - * Returns 0 successful, a positive error code number otherwise - * and -1 in case of internal or API error. - */ -int -xmlBufCat(xmlBufPtr buf, const xmlChar *str) { - if ((buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) return -1; - if (str == NULL) return -1; - return xmlBufAdd(buf, str, -1); -} - -/** - * xmlBufCCat: - * @buf: the buffer to dump - * @str: the C char string - * - * Append a zero terminated C string to an XML buffer. - * - * Returns 0 successful, a positive error code number otherwise - * and -1 in case of internal or API error. - */ -int -xmlBufCCat(xmlBufPtr buf, const char *str) { - const char *cur; - - if ((buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) return -1; - if (str == NULL) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufCCat: str == NULL\n"); -#endif - return -1; - } - for (cur = str;*cur != 0;cur++) { - if (buf->use + 10 >= buf->size) { - if (!xmlBufResize(buf, buf->use+10)){ - xmlBufMemoryError(buf, "growing buffer"); - return XML_ERR_NO_MEMORY; - } - } - buf->content[buf->use++] = *cur; - } - buf->content[buf->use] = 0; - UPDATE_COMPAT(buf) - return 0; -} - -/** - * xmlBufWriteCHAR: - * @buf: the XML buffer - * @string: the string to add - * - * routine which manages and grows an output buffer. This one adds - * xmlChars at the end of the buffer. - * - * Returns 0 if successful, a positive error code number otherwise - * and -1 in case of internal or API error. - */ -int -xmlBufWriteCHAR(xmlBufPtr buf, const xmlChar *string) { - if ((buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) - return(-1); - return(xmlBufCat(buf, string)); -} - -/** - * xmlBufWriteChar: - * @buf: the XML buffer output - * @string: the string to add - * - * routine which manage and grows an output buffer. This one add - * C chars at the end of the array. - * - * Returns 0 if successful, a positive error code number otherwise - * and -1 in case of internal or API error. - */ -int -xmlBufWriteChar(xmlBufPtr buf, const char *string) { - if ((buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) - return(-1); - return(xmlBufCCat(buf, string)); -} - - -/** - * xmlBufWriteQuotedString: - * @buf: the XML buffer output - * @string: the string to add - * - * routine which manage and grows an output buffer. This one writes - * a quoted or double quoted #xmlChar string, checking first if it holds - * quote or double-quotes internally - * - * Returns 0 if successful, a positive error code number otherwise - * and -1 in case of internal or API error. - */ -int -xmlBufWriteQuotedString(xmlBufPtr buf, const xmlChar *string) { - const xmlChar *cur, *base; - if ((buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) - return(-1); - if (xmlStrchr(string, '\"')) { - if (xmlStrchr(string, '\'')) { -#ifdef DEBUG_BUFFER - xmlGenericError(xmlGenericErrorContext, - "xmlBufWriteQuotedString: string contains quote and double-quotes !\n"); -#endif - xmlBufCCat(buf, "\""); - base = cur = string; - while(*cur != 0){ - if(*cur == '"'){ - if (base != cur) - xmlBufAdd(buf, base, cur - base); - xmlBufAdd(buf, BAD_CAST """, 6); - cur++; - base = cur; - } - else { - cur++; - } - } - if (base != cur) - xmlBufAdd(buf, base, cur - base); - xmlBufCCat(buf, "\""); - } - else{ - xmlBufCCat(buf, "\'"); - xmlBufCat(buf, string); - xmlBufCCat(buf, "\'"); - } - } else { - xmlBufCCat(buf, "\""); - xmlBufCat(buf, string); - xmlBufCCat(buf, "\""); - } - return(0); -} - -/** - * xmlBufFromBuffer: - * @buffer: incoming old buffer to convert to a new one - * - * Helper routine to switch from the old buffer structures in use - * in various APIs. It creates a wrapper xmlBufPtr which will be - * used for internal processing until the xmlBufBackToBuffer() is - * issued. - * - * Returns a new xmlBufPtr unless the call failed and NULL is returned - */ -xmlBufPtr -xmlBufFromBuffer(xmlBufferPtr buffer) { - xmlBufPtr ret; - - if (buffer == NULL) - return(NULL); - - ret = (xmlBufPtr) xmlMalloc(sizeof(xmlBuf)); - if (ret == NULL) { - xmlBufMemoryError(NULL, "creating buffer"); - return(NULL); - } - ret->use = buffer->use; - ret->size = buffer->size; - ret->compat_use = buffer->use; - ret->compat_size = buffer->size; - ret->error = 0; - ret->buffer = buffer; - ret->alloc = buffer->alloc; - ret->content = buffer->content; - ret->contentIO = buffer->contentIO; - - return(ret); -} - -/** - * xmlBufBackToBuffer: - * @buf: new buffer wrapping the old one - * - * Function to be called once internal processing had been done to - * update back the buffer provided by the user. This can lead to - * a failure in case the size accumulated in the xmlBuf is larger - * than what an xmlBuffer can support on 64 bits (INT_MAX) - * The xmlBufPtr @buf wrapper is deallocated by this call in any case. - * - * Returns the old xmlBufferPtr unless the call failed and NULL is returned - */ -xmlBufferPtr -xmlBufBackToBuffer(xmlBufPtr buf) { - xmlBufferPtr ret; - - if ((buf == NULL) || (buf->error)) - return(NULL); - CHECK_COMPAT(buf) - if (buf->buffer == NULL) { - xmlBufFree(buf); - return(NULL); - } - - ret = buf->buffer; - /* - * What to do in case of error in the buffer ??? - */ - if (buf->use > INT_MAX) { - /* - * Worse case, we really allocated and used more than the - * maximum allowed memory for an xmlBuffer on this architecture. - * Keep the buffer but provide a truncated size value. - */ - xmlBufOverflowError(buf, "Used size too big for xmlBuffer"); - ret->use = INT_MAX; - ret->size = INT_MAX; - } else if (buf->size > INT_MAX) { - /* - * milder case, we allocated more than the maximum allowed memory - * for an xmlBuffer on this architecture, but used less than the - * limit. - * Keep the buffer but provide a truncated size value. - */ - xmlBufOverflowError(buf, "Allocated size too big for xmlBuffer"); - ret->size = INT_MAX; - } - ret->use = (int) buf->use; - ret->size = (int) buf->size; - ret->alloc = buf->alloc; - ret->content = buf->content; - ret->contentIO = buf->contentIO; - xmlFree(buf); - return(ret); -} - -/** - * xmlBufMergeBuffer: - * @buf: an xmlBufPtr - * @buffer: the buffer to consume into @buf - * - * The content of @buffer is appended to @buf and @buffer is freed - * - * Returns -1 in case of error, 0 otherwise, in any case @buffer is freed - */ -int -xmlBufMergeBuffer(xmlBufPtr buf, xmlBufferPtr buffer) { - int ret = 0; - - if ((buf == NULL) || (buf->error)) { - xmlBufferFree(buffer); - return(-1); - } - CHECK_COMPAT(buf) - if ((buffer != NULL) && (buffer->content != NULL) && - (buffer->use > 0)) { - ret = xmlBufAdd(buf, buffer->content, buffer->use); - } - xmlBufferFree(buffer); - return(ret); -} - -/** - * xmlBufResetInput: - * @buf: an xmlBufPtr - * @input: an xmlParserInputPtr - * - * Update the input to use the current set of pointers from the buffer. - * - * Returns -1 in case of error, 0 otherwise - */ -int -xmlBufResetInput(xmlBufPtr buf, xmlParserInputPtr input) { - if ((input == NULL) || (buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - input->base = input->cur = buf->content; - input->end = &buf->content[buf->use]; - return(0); -} - -/** - * xmlBufGetInputBase: - * @buf: an xmlBufPtr - * @input: an xmlParserInputPtr - * - * Get the base of the @input relative to the beginning of the buffer - * - * Returns the size_t corresponding to the displacement - */ -size_t -xmlBufGetInputBase(xmlBufPtr buf, xmlParserInputPtr input) { - size_t base; - - if ((input == NULL) || (buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - base = input->base - buf->content; - /* - * We could do some pointer arythmetic checks but that's probably - * sufficient. - */ - if (base > buf->size) { - xmlBufOverflowError(buf, "Input reference outside of the buffer"); - base = 0; - } - return(base); -} - -/** - * xmlBufSetInputBaseCur: - * @buf: an xmlBufPtr - * @input: an xmlParserInputPtr - * @base: the base value relative to the beginning of the buffer - * @cur: the cur value relative to the beginning of the buffer - * - * Update the input to use the base and cur relative to the buffer - * after a possible reallocation of its content - * - * Returns -1 in case of error, 0 otherwise - */ -int -xmlBufSetInputBaseCur(xmlBufPtr buf, xmlParserInputPtr input, - size_t base, size_t cur) { - if ((input == NULL) || (buf == NULL) || (buf->error)) - return(-1); - CHECK_COMPAT(buf) - input->base = &buf->content[base]; - input->cur = input->base + cur; - input->end = &buf->content[buf->use]; - return(0); -} - -#define bottom_buf -#include "elfgcchack.h" |