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#include "mupdf/fitz.h"
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _MSC_VER
#ifndef NDEBUG
#define USE_OUTPUT_DEBUG_STRING
#include <windows.h>
#endif
#endif
#ifdef __ANDROID__
#define USE_ANDROID_LOG
#include <android/log.h>
#endif
/* Warning context */
void fz_var_imp(void *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);
}
ctx->warn->message[0] = 0;
ctx->warn->count = 0;
}
void fz_vwarn(fz_context *ctx, const char *fmt, va_list ap)
{
char buf[sizeof ctx->warn->message];
fz_vsnprintf(buf, sizeof buf, fmt, ap);
buf[sizeof(buf) - 1] = 0;
#ifdef USE_OUTPUT_DEBUG_STRING
OutputDebugStringA(buf);
OutputDebugStringA("\n");
#endif
#ifdef USE_ANDROID_LOG
__android_log_print(ANDROID_LOG_WARN, "libmupdf", "%s", buf);
#endif
if (!strcmp(buf, ctx->warn->message))
{
ctx->warn->count++;
}
else
{
fz_flush_warnings(ctx);
fprintf(stderr, "warning: %s\n", buf);
fz_strlcpy(ctx->warn->message, buf, sizeof ctx->warn->message);
ctx->warn->count = 1;
}
}
void fz_warn(fz_context *ctx, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fz_vwarn(ctx, fmt, ap);
va_end(ap);
}
/* 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.
*/
FZ_NORETURN static void throw(fz_context *ctx)
{
if (ctx->error->top >= ctx->error->stack)
{
ctx->error->top->code += 2;
fz_longjmp(ctx->error->top->buffer, 1);
}
else
{
fprintf(stderr, "uncaught error: %s\n", ctx->error->message);
#ifdef USE_OUTPUT_DEBUG_STRING
OutputDebugStringA("uncaught error: ");
OutputDebugStringA(ctx->error->message);
OutputDebugStringA("\n");
#endif
#ifdef USE_ANDROID_LOG
__android_log_print(ANDROID_LOG_ERROR, "libmupdf", "(uncaught) %s", ctx->error->message);
#endif
exit(EXIT_FAILURE);
}
}
/* Only called when we hit the bottom of the exception stack.
* Do the same as fz_throw, but don't actually throw. */
static int fz_fake_throw(fz_context *ctx, int code, const char *fmt, ...)
{
va_list args;
ctx->error->errcode = code;
va_start(args, fmt);
fz_vsnprintf(ctx->error->message, sizeof ctx->error->message, fmt, args);
ctx->error->message[sizeof(ctx->error->message) - 1] = 0;
va_end(args);
if (code != FZ_ERROR_ABORT)
{
fz_flush_warnings(ctx);
fprintf(stderr, "error: %s\n", ctx->error->message);
#ifdef USE_OUTPUT_DEBUG_STRING
OutputDebugStringA("error: ");
OutputDebugStringA(ctx->error->message);
OutputDebugStringA("\n");
#endif
#ifdef USE_ANDROID_LOG
__android_log_print(ANDROID_LOG_ERROR, "libmupdf", "%s", ctx->error->message);
#endif
}
/* We need to arrive in the always/catch block as if throw
* had taken place. */
ctx->error->top++;
ctx->error->top->code = 2;
return 0;
}
int fz_push_try(fz_context *ctx)
{
/* If we would overflow the exception stack, throw an exception instead
* of entering the try block. We assume that we always have room for
* 1 extra level on the stack here - i.e. we throw the error on us
* starting to use the last level. */
if (ctx->error->top + 2 >= ctx->error->stack + nelem(ctx->error->stack))
return fz_fake_throw(ctx, FZ_ERROR_GENERIC, "exception stack overflow!");
ctx->error->top++;
ctx->error->top->code = 0;
return 1;
}
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;
}
FZ_NORETURN void fz_vthrow(fz_context *ctx, int code, const char *fmt, va_list ap)
{
ctx->error->errcode = code;
fz_vsnprintf(ctx->error->message, sizeof ctx->error->message, fmt, ap);
ctx->error->message[sizeof(ctx->error->message) - 1] = 0;
if (code != FZ_ERROR_ABORT)
{
fz_flush_warnings(ctx);
fprintf(stderr, "error: %s\n", ctx->error->message);
#ifdef USE_OUTPUT_DEBUG_STRING
OutputDebugStringA("error: ");
OutputDebugStringA(ctx->error->message);
OutputDebugStringA("\n");
#endif
#ifdef USE_ANDROID_LOG
__android_log_print(ANDROID_LOG_ERROR, "libmupdf", "%s", ctx->error->message);
#endif
}
throw(ctx);
}
FZ_NORETURN void fz_throw(fz_context *ctx, int code, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fz_vthrow(ctx, code, fmt, ap);
va_end(ap);
}
FZ_NORETURN void fz_rethrow(fz_context *ctx)
{
assert(ctx && ctx->error && ctx->error->errcode >= FZ_ERROR_NONE);
throw(ctx);
}
void fz_rethrow_if(fz_context *ctx, int err)
{
assert(ctx && ctx->error && ctx->error->errcode >= FZ_ERROR_NONE);
if (ctx->error->errcode == err)
fz_rethrow(ctx);
}
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