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
|
#include "mupdf/fitz.h"
/* Warning context */
void fz_var_imp(void *var)
{
UNUSED(var); /* Do nothing */
}
void fz_flush_warnings(fz_context *ctx)
{
if (ctx->warn->count > 1)
{
fprintf(stderr, "warning: ... repeated %d times ...\n", ctx->warn->count);
LOGE("warning: ... repeated %d times ...\n", ctx->warn->count);
}
ctx->warn->message[0] = 0;
ctx->warn->count = 0;
}
void fz_warn(fz_context *ctx, const char *fmt, ...)
{
va_list ap;
char buf[sizeof ctx->warn->message];
va_start(ap, fmt);
vsnprintf(buf, sizeof buf, fmt, ap);
va_end(ap);
if (!strcmp(buf, ctx->warn->message))
{
ctx->warn->count++;
}
else
{
fz_flush_warnings(ctx);
fprintf(stderr, "warning: %s\n", buf);
LOGE("warning: %s\n", buf);
fz_strlcpy(ctx->warn->message, buf, sizeof ctx->warn->message);
ctx->warn->count = 1;
}
}
/* Error context */
/* When we first setjmp, code is set to 0. Whenever we throw, we add 2 to
* this code. Whenever we enter the always block, we add 1.
*
* fz_push_try sets code to 0.
* If (fz_throw called within fz_try)
* fz_throw makes code = 2.
* If (no always block present)
* enter catch region with code = 2. OK.
* else
* fz_always entered as code < 3; Makes code = 3;
* if (fz_throw called within fz_always)
* fz_throw makes code = 5
* fz_always is not reentered.
* catch region entered with code = 5. OK.
* else
* catch region entered with code = 3. OK
* else
* if (no always block present)
* catch region not entered as code = 0. OK.
* else
* fz_always entered as code < 3. makes code = 1
* if (fz_throw called within fz_always)
* fz_throw makes code = 3;
* fz_always NOT entered as code >= 3
* catch region entered with code = 3. OK.
* else
* catch region entered with code = 1.
*/
static void throw(fz_error_context *ex) FZ_NORETURN;
static void throw(fz_error_context *ex)
{
if (ex->top >= 0) {
fz_longjmp(ex->stack[ex->top].buffer, ex->stack[ex->top].code + 2);
} else {
fprintf(stderr, "uncaught exception: %s\n", ex->message);
LOGE("uncaught exception: %s\n", ex->message);
exit(EXIT_FAILURE);
}
}
int fz_push_try(fz_error_context *ex)
{
assert(ex);
ex->top++;
/* Normal case, get out of here quick */
if (ex->top < nelem(ex->stack)-1)
return 1; /* We exit here, and the setjmp sets the code to 0 */
/* We reserve the top slot on the exception stack purely to cope with
* the case when we overflow. If we DO hit this, then we 'throw'
* immediately - returning 0 stops the setjmp happening and takes us
* direct to the always/catch clauses. */
assert(ex->top == nelem(ex->stack)-1);
strcpy(ex->message, "exception stack overflow!");
ex->stack[ex->top].code = 2;
fprintf(stderr, "error: %s\n", ex->message);
LOGE("error: %s\n", ex->message);
return 0;
}
int fz_caught(fz_context *ctx)
{
assert(ctx && ctx->error && ctx->error->errcode >= FZ_ERROR_NONE);
return ctx->error->errcode;
}
const char *fz_caught_message(fz_context *ctx)
{
assert(ctx && ctx->error && ctx->error->errcode >= FZ_ERROR_NONE);
return ctx->error->message;
}
void fz_throw(fz_context *ctx, int code, const char *fmt, ...)
{
va_list args;
ctx->error->errcode = code;
va_start(args, fmt);
vsnprintf(ctx->error->message, sizeof ctx->error->message, fmt, args);
va_end(args);
fz_flush_warnings(ctx);
fprintf(stderr, "error: %s\n", ctx->error->message);
LOGE("error: %s\n", ctx->error->message);
throw(ctx->error);
}
void fz_rethrow(fz_context *ctx)
{
assert(ctx && ctx->error && ctx->error->errcode >= FZ_ERROR_NONE);
throw(ctx->error);
}
void fz_rethrow_message(fz_context *ctx, const char *fmt, ...)
{
va_list args;
assert(ctx && ctx->error && ctx->error->errcode >= FZ_ERROR_NONE);
va_start(args, fmt);
vsnprintf(ctx->error->message, sizeof ctx->error->message, fmt, args);
va_end(args);
fz_flush_warnings(ctx);
fprintf(stderr, "error: %s\n", ctx->error->message);
LOGE("error: %s\n", ctx->error->message);
throw(ctx->error);
}
|
