/
common.c
243 lines (209 loc) · 5.11 KB
/
common.c
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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
/*
TiMidity -- Experimental MIDI to WAVE converter
Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
This program is free software; you can redistribute it and/or modify
it under the terms of the Perl Artistic License, available in COPYING.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "config.h"
#include "common.h"
#include "output.h"
#include "ctrlmode.h"
/* I guess "rb" should be right for any libc */
#define OPEN_MODE "rb"
char current_filename[PATH_MAX];
static PathList *pathlist=NULL;
/* Try to open a file for reading. If the filename ends in one of the
defined compressor extensions, pipe the file through the decompressor */
static FILE *try_to_open(const char *name, int decompress, int noise_mode)
{
FILE *fp;
fp=fopen(name, OPEN_MODE); /* First just check that the file exists */
if (!fp)
return 0;
#ifdef DECOMPRESSOR_LIST
if (decompress)
{
int l,el;
static char *decompressor_list[] = DECOMPRESSOR_LIST, **dec;
const char *cp;
char tmp[PATH_MAX], tmp2[PATH_MAX], *cp2;
/* Check if it's a compressed file */
l=strlen(name);
for (dec=decompressor_list; *dec; dec+=2)
{
el=strlen(*dec);
if ((el>=l) || (strcmp(name+l-el, *dec)))
continue;
/* Yes. Close the file, open a pipe instead. */
fclose(fp);
/* Quote some special characters in the file name */
cp=name;
cp2=tmp2;
while (*cp)
{
switch(*cp)
{
case '\'':
case '\\':
case ' ':
case '`':
case '!':
case '"':
case '&':
case ';':
*cp2++='\\';
}
*cp2++=*cp++;
}
*cp2=0;
sprintf(tmp, *(dec+1), tmp2);
fp=popen(tmp, "r");
break;
}
}
#endif
return fp;
}
/* This is meant to find and open files for reading, possibly piping
them through a decompressor. */
FILE *open_file(const char *name, int decompress, int noise_mode)
{
FILE *fp;
PathList *plp;
int l;
if (!name || !(*name))
{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "Attempted to open nameless file.");
return 0;
}
if (pathlist==NULL) {
/* Generate path list */
#ifdef DEFAULT_PATH
add_to_pathlist(DEFAULT_PATH);
#endif
#ifdef DEFAULT_PATH1
add_to_pathlist(DEFAULT_PATH1);
#endif
#ifdef DEFAULT_PATH2
add_to_pathlist(DEFAULT_PATH2);
#endif
#ifdef DEFAULT_PATH3
add_to_pathlist(DEFAULT_PATH3);
#endif
}
/* First try the given name */
strncpy(current_filename, name, PATH_MAX - 1);
current_filename[PATH_MAX - 1]='\0';
ctl->cmsg(CMSG_INFO, VERB_DEBUG, "Trying to open %s", current_filename);
if ((fp=try_to_open(current_filename, decompress, noise_mode)))
return fp;
#ifdef ENOENT
if (noise_mode && (errno != ENOENT))
{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "%s: %s",
current_filename, strerror(errno));
return 0;
}
#endif
plp=pathlist;
if (name[0] != PATH_SEP)
while (plp) /* Try along the path then */
{
*current_filename=0;
l=strlen(plp->path);
if(l)
{
strcpy(current_filename, plp->path);
if(current_filename[l-1]!=PATH_SEP)
strcat(current_filename, PATH_STRING);
}
strcat(current_filename, name);
ctl->cmsg(CMSG_INFO, VERB_DEBUG, "Trying to open %s", current_filename);
if ((fp=try_to_open(current_filename, decompress, noise_mode)))
return fp;
#ifdef ENOENT
if (noise_mode && (errno != ENOENT))
{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "%s: %s",
current_filename, strerror(errno));
return 0;
}
#endif
plp=plp->next;
}
/* Nothing could be opened. */
*current_filename=0;
if (noise_mode>=2)
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "%s: %s", name, strerror(errno));
return 0;
}
/* This closes files opened with open_file */
void close_file(FILE *fp)
{
#ifdef DECOMPRESSOR_LIST
if (pclose(fp)) /* Any better ideas? */
#endif
fclose(fp);
strncpy(current_filename, "MIDI file", PATH_MAX - 1);
}
/* This is meant for skipping a few bytes in a file or fifo. */
void skip(FILE *fp, size_t len)
{
size_t c;
char tmp[PATH_MAX];
while (len>0)
{
c=len;
if (c>PATH_MAX) c=PATH_MAX;
len-=c;
if (c!=fread(tmp, 1, c, fp))
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "%s: skip: %s",
current_filename, strerror(errno));
}
}
/* This'll allocate memory or die. */
void *safe_malloc(size_t count)
{
void *p;
if (count > (1<<21))
{
ctl->cmsg(CMSG_FATAL, VERB_NORMAL,
"Strange, I feel like allocating %d bytes. This must be a bug.",
count);
}
else if ((p=malloc(count)))
return p;
else
ctl->cmsg(CMSG_FATAL, VERB_NORMAL, "Sorry. Couldn't malloc %d bytes.", count);
ctl->close();
exit(10);
return(NULL);
}
/* This adds a directory to the path list */
void add_to_pathlist(const char *s)
{
PathList *plp=safe_malloc(sizeof(PathList));
strcpy((plp->path=safe_malloc(strlen(s)+1)),s);
plp->next=pathlist;
pathlist=plp;
}
/* Free memory associated to path list */
void free_pathlist(void)
{
PathList *plp, *next_plp;
plp = pathlist;
while (plp) {
if (plp->path) {
free(plp->path);
plp->path=NULL;
}
next_plp = plp->next;
free(plp);
plp = next_plp;
}
pathlist = NULL;
}