ReactOS  0.4.14-dev-297-g23e575c
stream.c
Go to the documentation of this file.
1 /*
2  * Copyright 2007 Jacek Caban for CodeWeavers
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
17  */
18 
19 #include "hhctrl.h"
20 #include "stream.h"
21 
22 #include "wine/debug.h"
23 
25 
27 {
28  buf->size = 8;
29  buf->len = 0;
30  buf->buf = heap_alloc(buf->size);
31 }
32 
34 {
35  buf->len = 0;
36 }
37 
39 {
40  heap_free(buf->buf);
41 }
42 
43 static void strbuf_append(strbuf_t *buf, const char *data, int len)
44 {
45  if(buf->len+len > buf->size) {
46  buf->size = buf->len+len;
47  buf->buf = heap_realloc(buf->buf, buf->size);
48  }
49 
50  memcpy(buf->buf+buf->len, data, len);
51  buf->len += len;
52 }
53 
55 {
56  memset(stream, 0, sizeof(stream_t));
57  stream->str = str;
58 }
59 
61 {
62  BOOL b = TRUE;
63  ULONG i;
64 
65  while(b) {
66  for(i=stream->p; i<stream->size; i++) {
67  if(stream->buf[i] == c) {
68  b = FALSE;
69  break;
70  }
71  }
72 
73  if(buf && i > stream->p)
75  stream->p = i;
76 
77  if(stream->p == stream->size) {
78  stream->p = 0;
79  IStream_Read(stream->str, stream->buf, sizeof(stream->buf), &stream->size);
80  if(!stream->size)
81  break;
82  }
83  }
84 
85  return stream->size != 0;
86 }
87 
89 {
90  const char *ptr = node->buf+1;
91 
93 
94  while(*ptr != '>' && !isspace(*ptr))
95  ptr++;
96 
97  strbuf_append(name, node->buf+1, ptr-node->buf-1);
98  strbuf_append(name, "", 1);
99 }
100 
101 /* Return the stream content up to the next HTML tag.
102  *
103  * Note: the first returned character is the end of the last tag (>).
104  */
106 {
107  if(!stream_chr(stream, buf, '<'))
108  return FALSE;
109 
110  return TRUE;
111 }
112 
114 {
115  int tag_count = 0, b = buf->len;
116  char *p;
117 
118  while(1)
119  {
120  if(!stream_chr(stream, buf, '>'))
121  return FALSE;
122  if(buf->len == 0)
123  break;
124  p = &buf->buf[b];
125  while((p = memchr(p+1, '"', buf->len-(p+1-buf->buf))) != NULL)
126  tag_count++;
127  b = buf->len;
128  if(tag_count % 2 != 0)
129  {
130  if(!stream_chr(stream, buf, '"'))
131  return FALSE;
132  tag_count++;
133  }
134  else
135  break;
136  }
137  return TRUE;
138 }
139 
141 {
142  /* find the beginning of the next node */
143  if(!stream_chr(stream, NULL, '<'))
144  return FALSE;
145 
146  /* read out the data of the next node */
147  if(!find_node_end(stream, buf))
148  return FALSE;
149 
150  strbuf_append(buf, ">", 2);
151 
152  return TRUE;
153 }
154 
155 /*
156  * Find the value of a named HTML attribute.
157  *
158  * Note: Attribute names are case insensitive, so it is necessary to
159  * put both the node text and the attribute name in the same case
160  * before attempting a string search.
161  */
162 const char *get_attr(const char *node, const char *name, int *len)
163 {
164  const char *ptr, *ptr2;
165  int name_len, node_len;
166  char name_buf[32];
167  char *node_buf;
168  int i;
169 
170  /* Create a lower case copy of the node */
171  node_len = strlen(node)+1;
172  node_buf = heap_alloc(node_len*sizeof(char));
173  if(!node_buf)
174  return NULL;
175  memcpy(node_buf, node, node_len);
176  for(i=0;i<node_len;i++)
177  node_buf[i] = tolower(node_buf[i]);
178  /* Create a lower case copy of the attribute name (search string) */
179  name_len = strlen(name);
180  memcpy(name_buf, name, name_len);
181  for(i=0;i<name_len;i++)
182  name_buf[i] = tolower(name_buf[i]);
183  name_buf[name_len++] = '=';
184  name_buf[name_len++] = '\"';
185  name_buf[name_len] = 0;
186 
187  ptr = strstr(node_buf, name_buf);
188  if(!ptr) {
189  WARN("name not found\n");
190  heap_free(node_buf);
191  return NULL;
192  }
193 
194  ptr += name_len;
195  ptr2 = strchr(ptr, '\"');
196  if(!ptr2)
197  {
198  heap_free(node_buf);
199  return NULL;
200  }
201 
202  *len = ptr2-ptr;
203  /* Return the pointer offset within the original string */
204  ptr = node+(ptr-node_buf);
205 
206  heap_free(node_buf);
207  return ptr;
208 }
#define isspace(c)
Definition: acclib.h:69
void get_node_name(strbuf_t *node, strbuf_t *name)
Definition: stream.c:88
#define TRUE
Definition: types.h:120
#define memchr(s, c, n)
Definition: mkisofs.h:875
ACPI_SIZE strlen(const char *String)
Definition: utclib.c:269
GLenum GLuint GLenum GLsizei const GLchar * buf
Definition: glext.h:7751
char * strstr(char *String1, char *String2)
Definition: utclib.c:653
const char * get_attr(const char *node, const char *name, int *len)
Definition: stream.c:162
#define WARN(fmt,...)
Definition: debug.h:111
void strbuf_init(strbuf_t *buf)
Definition: stream.c:26
BOOL next_node(stream_t *stream, strbuf_t *buf)
Definition: stream.c:140
static void * heap_realloc(void *mem, size_t len)
Definition: appwiz.h:70
static BOOL stream_chr(stream_t *stream, strbuf_t *buf, char c)
Definition: stream.c:60
static void * heap_alloc(size_t len)
Definition: appwiz.h:65
WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp)
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
unsigned int BOOL
Definition: ntddk_ex.h:94
static PVOID ptr
Definition: dispmode.c:27
void strbuf_free(strbuf_t *buf)
Definition: stream.c:38
const WCHAR * str
smooth NULL
Definition: ftsmooth.c:416
#define b
Definition: ke_i.h:79
GLboolean GLboolean GLboolean b
Definition: glext.h:6204
GLsizeiptr size
Definition: glext.h:5919
const GLubyte * c
Definition: glext.h:8905
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: gl.h:1950
BOOL next_content(stream_t *stream, strbuf_t *buf)
Definition: stream.c:105
unsigned int size
Definition: parse.h:27
Definition: parse.h:22
static void strbuf_append(strbuf_t *buf, const char *data, int len)
Definition: stream.c:43
#define memcpy(s1, s2, n)
Definition: mkisofs.h:878
GLenum GLsizei len
Definition: glext.h:6722
void stream_init(stream_t *stream, IStream *str)
Definition: stream.c:54
unsigned char * p
Definition: parse.h:24
char * strchr(const char *String, int ch)
Definition: utclib.c:501
Definition: name.c:36
unsigned int ULONG
Definition: retypes.h:1
static BOOL find_node_end(stream_t *stream, strbuf_t *buf)
Definition: stream.c:113
GLfloat GLfloat p
Definition: glext.h:8902
#define memset(x, y, z)
Definition: compat.h:39
int tolower(int c)
Definition: utclib.c:902
void strbuf_zero(strbuf_t *buf)
Definition: stream.c:33
static BOOL heap_free(void *mem)
Definition: appwiz.h:75
Definition: dlist.c:348