mh_ctx.c
3.06 KB
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
/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
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; either version 2, or (at your option)
any later version.
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* MH context functions. */
#include <mh.h>
#include <sys/types.h>
#include <sys/stat.h>
mh_context_t *
mh_context_create (char *name, int copy)
{
mh_context_t *ctx;
ctx = malloc (sizeof (*ctx));
if (!ctx)
{
mu_error ("not enough memory");
abort ();
}
if (copy)
ctx->name = name;
else
{
ctx->name = strdup (name);
if (!ctx->name)
{
mu_error ("not enough memory");
abort ();
}
}
ctx->header = NULL;
return ctx;
}
int
mh_context_read (mh_context_t *ctx)
{
int status;
char *blurb;
struct stat st;
FILE *fp;
if (stat (ctx->name, &st))
return errno;
blurb = malloc (st.st_size);
if (!blurb)
return ENOMEM;
fp = fopen (ctx->name, "r");
if (!fp)
{
free (blurb);
return errno;
}
fread (blurb, st.st_size, 1, fp);
fclose (fp);
if (status = header_create (&ctx->header, blurb, st.st_size, NULL))
free (blurb);
return status;
}
int
mh_context_write (mh_context_t *ctx)
{
stream_t stream;
char buffer[512];
size_t off = 0, n;
FILE *fp;
fp = fopen (ctx->name, "w");
if (!fp)
{
mh_error ("can't write context file %s: %s",
ctx->name, strerror (errno));
return 1;
}
header_get_stream (ctx->header, &stream);
while (stream_read (stream, buffer, sizeof buffer - 1, off, &n) == 0
&& n != 0)
{
buffer[n] = '\0';
fprintf (fp, "%s", buffer);
off += n;
}
fclose (fp);
return 0;
}
/* FIXME: mh_context_get_value returns a pointer to the allocated memory.
Instead, it should return a const pointer to the static storage within
the header_t structure and be declared as
`const char *mh_context_get_value()'. Current implementation of
header_.* functions does not allow that. */
char *
mh_context_get_value (mh_context_t *ctx, const char *name, const char *defval)
{
char *p;
if (header_aget_value (ctx->header, name, &p))
p = defval;
return p;
}
int
mh_context_set_value (mh_context_t *ctx, const char *name, const char *value)
{
if (!ctx->header)
{
int rc;
if ((rc = header_create (&ctx->header, NULL, 0, NULL)) != 0)
{
mh_error ("Can't create context %s: %s",
ctx->name,
mu_errstring (rc));
return 1;
}
}
return header_set_value (ctx->header, name, value, 1);
}