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
148
149
150
|
/*
* Copyright (C) 2000, Matias Atria
*
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "common.h"
char *dgets(Dstring *dstr, FILE *in)
{
char buffer[256];
dstr->length = 0;
if(feof(in))
return NULL;
while(fgets(buffer, 256, in) != NULL) {
int len = strlen(buffer);
if(buffer[len-1] == '\n') {
dstring_append(dstr, buffer, len - 1);
break;
}
dstring_append(dstr, buffer, len);
}
if(dstr->data)
dstr->data[dstr->length] = 0;
return dstr->data;
}
/* some simple helper functions to manipulate file names */
const char *file_basename(const char *filename)
{
const char *ptr = strrchr(filename, '/');
return (ptr ? ptr + 1 : filename);
}
const char *file_extension(const char *filename)
{
const char *ptr = strchr(file_basename(filename), '.');
return (ptr ? ptr + 1 : NULL);
}
int file_readable(const char *filename)
{
int status = (access(filename, R_OK) == 0);
DEBUG((DBG_FILES, "file_redable(%s) -> %s\n",
filename, status ? "Yes" : "No"));
return status;
}
int file_exists(const char *filename)
{
int status = (access(filename, F_OK) == 0);
DEBUG((DBG_FILES, "file_exists(%s) -> %s\n",
filename, status ? "Yes" : "No"));
return status;
}
static char *xstrchre(const char *string, int c)
{
const char *ptr;
for(ptr = string; *ptr && *ptr != c; ptr++);
return (char *)ptr;
}
char *find_in_path(const char *filename, const char *path)
{
const char *p, *q;
char *try;
int len;
/* if the file is readable as given, return it */
if(file_readable(filename))
return xstrdup(filename);
/* worst case scenario */
try = xmalloc(strlen(path) + strlen(filename) + 2);
try[0] = 0;
for(p = path; *p; p = q) {
q = xstrchre(p, ':');
len = q - p;
xstrncpy(try, p, len);
try[len] = '/';
strcpy(try + len + 1, filename);
if(file_readable(try))
break;
if(*q) q++;
}
if(*p)
return try;
else {
xfree(try);
return NULL;
}
}
char *read_into_core(const char *file, size_t *size)
{
FILE *in;
struct stat st;
char *ptr;
in = fopen(file, "r");
if(in == NULL)
return NULL;
if(fstat(fileno(in), &st) < 0) {
/* I don't think this is possible, but who knows */
fclose(in);
return NULL;
}
if(st.st_size == 0) {
warning("%s: file is empty\n", file);
fclose(in);
return NULL;
}
ptr = xmalloc(st.st_size + 1);
if(fread(ptr, st.st_size, 1, in) != 1) {
fclose(in);
xfree(ptr);
return NULL;
}
fclose(in);
ptr[st.st_size] = 0;
if(size) *size = st.st_size;
return ptr;
}
|
