1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#define EAT_SPACE(ptr) while( ptr && *ptr && isspace(*ptr) ) ptr++
#define EAT_WORD(ptr) while( ptr && *ptr && !isspace(*ptr) && ('>' != *ptr)) ptr++
char *appendstring(char *string, /* original string */
char *buffer, /* to append */
int *stringlen, int *stralloc)
{
int len = strlen(buffer);
if((len + *stringlen) > *stralloc) {
char *newptr= realloc(string, *stralloc*2);
if(newptr) {
string = newptr;
*stralloc *= 2;
}
else
return NULL;
}
strcpy(&string[*stringlen], buffer);
*stringlen += len;
return string;
}
char *spitout(FILE *stream, char *main, char *sub, int *size)
{
char buffer[8192]; /* big enough for anything */
char cmain[128]=""; /* current main section */
char csub[128]=""; /* current sub section */
char *ptr;
char *end;
char display = 0;
char *string;
int stringlen=0;
int stralloc=256;
int len;
enum {
STATE_OUTSIDE,
STATE_INMAIN,
STATE_INSUB,
STATE_ILLEGAL
} state = STATE_OUTSIDE;
string = (char *)malloc(stralloc);
while(fgets(buffer, sizeof(buffer), stream)) {
ptr = buffer;
/* pass white spaces */
EAT_SPACE(ptr);
if('<' != *ptr) {
if(display) {
printf("=> %s", buffer);
string = appendstring(string, buffer, &stringlen, &stralloc);
printf("* %s\n", buffer);
}
continue;
}
ptr++;
EAT_SPACE(ptr);
if('/' == *ptr) {
/* end of a section */
ptr++;
EAT_SPACE(ptr);
end = ptr;
EAT_WORD(end);
*end = 0;
if((state == STATE_INSUB) &&
!strcmp(csub, ptr)) {
/* this is the end of the currently read sub section */
state--;
csub[0]=0; /* no sub anymore */
display=0;
}
else if((state == STATE_INMAIN) &&
!strcmp(cmain, ptr)) {
/* this is the end of the currently read main section */
state--;
cmain[0]=0; /* no main anymore */
display=0;
}
}
else if(!display) {
/* this is the beginning of a section */
end = ptr;
EAT_WORD(end);
*end = 0;
switch(state) {
case STATE_OUTSIDE:
strcpy(cmain, ptr);
state = STATE_INMAIN;
break;
case STATE_INMAIN:
strcpy(csub, ptr);
state = STATE_INSUB;
break;
}
}
if(display) {
string = appendstring(string, buffer, &stringlen, &stralloc);
printf("* %s\n", buffer);
}
if((STATE_INSUB == state) &&
!strcmp(cmain, main) &&
!strcmp(csub, sub)) {
printf("* (%d bytes) %s\n", stringlen, buffer);
display = 1; /* start displaying */
}
else {
printf("%d (%s/%s): %s\n", state, cmain, csub, buffer);
display = 0; /* no display */
}
}
*size = stringlen;
return string;
}
#ifdef TEST
int main(int argc, char **argv)
{
if(argc< 3) {
printf("./moo main sub\n");
}
else {
int size;
char *buffer = spitout(stdin, argv[1], argv[2], &size);
}
return 0;
}
#endif
|
