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#include "mupdf/fitz.h"
static void
file_write(fz_context *ctx, void *opaque, const void *buffer, int count)
{
FILE *file = opaque;
size_t n;
if (count < 0)
return;
if (count == 1)
{
int x = putc(((unsigned char*)buffer)[0], file);
if (x == EOF && ferror(file))
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot fwrite: %s", strerror(errno));
return;
}
n = fwrite(buffer, 1, count, file);
if (n < (size_t)count && ferror(file))
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot fwrite: %s", strerror(errno));
}
static void
file_seek(fz_context *ctx, void *opaque, fz_off_t off, int whence)
{
FILE *file = opaque;
int n = fz_fseek(file, off, whence);
if (n < 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot fseek: %s", strerror(errno));
}
static fz_off_t
file_tell(fz_context *ctx, void *opaque)
{
FILE *file = opaque;
fz_off_t off = fz_ftell(file);
if (off == -1)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot ftell: %s", strerror(errno));
return off;
}
static void
file_close(fz_context *ctx, void *opaque)
{
FILE *file = opaque;
int n = fclose(file);
if (n < 0)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot fclose: %s", strerror(errno));
}
fz_output *
fz_new_output_with_file_ptr(fz_context *ctx, FILE *file, int close)
{
fz_output *out = fz_malloc_struct(ctx, fz_output);
out->opaque = file;
out->write = file_write;
out->seek = file_seek;
out->tell = file_tell;
out->close = close ? file_close : NULL;
return out;
}
fz_output *
fz_new_output_with_path(fz_context *ctx, const char *filename, int append)
{
fz_output *out = NULL;
FILE *file = fz_fopen(filename, append ? "ab" : "wb");
if (!file)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot open file '%s': %s", filename, strerror(errno));
fz_try(ctx)
{
out = fz_new_output_with_file_ptr(ctx, file, 1);
}
fz_catch(ctx)
{
fclose(file);
fz_rethrow(ctx);
}
return out;
}
static void
buffer_write(fz_context *ctx, void *opaque, const void *data, int len)
{
fz_buffer *buffer = opaque;
fz_write_buffer(ctx, buffer, data, len);
}
static void
buffer_seek(fz_context *ctx, void *opaque, fz_off_t off, int whence)
{
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot seek in buffer: %s", strerror(errno));
}
static fz_off_t
buffer_tell(fz_context *ctx, void *opaque)
{
fz_buffer *buffer = opaque;
return buffer->len;
}
static void
buffer_close(fz_context *ctx, void *opaque)
{
fz_buffer *buffer = opaque;
fz_drop_buffer(ctx, buffer);
}
fz_output *
fz_new_output_with_buffer(fz_context *ctx, fz_buffer *buf)
{
fz_output *out = fz_malloc_struct(ctx, fz_output);
out->opaque = fz_keep_buffer(ctx, buf);
out->write = buffer_write;
out->seek = buffer_seek;
out->tell = buffer_tell;
out->close = buffer_close;
return out;
}
void
fz_drop_output(fz_context *ctx, fz_output *out)
{
if (!out) return;
if (out->close)
out->close(ctx, out->opaque);
fz_free(ctx, out);
}
void
fz_seek_output(fz_context *ctx, fz_output *out, fz_off_t off, int whence)
{
if (!out) return;
out->seek(ctx, out->opaque, off, whence);
}
fz_off_t
fz_tell_output(fz_context *ctx, fz_output *out)
{
if (!out) return 0;
return out->tell(ctx, out->opaque);
}
void
fz_vprintf(fz_context *ctx, fz_output *out, const char *fmt, va_list old_args)
{
char buffer[256], *p = buffer;
int len;
va_list args;
if (!out) return;
/* First try using our fixed size buffer */
va_copy(args, old_args);
len = fz_vsnprintf(buffer, sizeof buffer, fmt, args);
va_copy_end(args);
/* If that failed, allocate a big enough buffer */
if (len > sizeof buffer)
{
p = fz_malloc(ctx, len);
va_copy(args, old_args);
fz_vsnprintf(p, len, fmt, args);
va_copy_end(args);
}
fz_try(ctx)
out->write(ctx, out->opaque, p, len);
fz_always(ctx)
if (p != buffer)
fz_free(ctx, p);
fz_catch(ctx)
fz_rethrow(ctx);
}
void
fz_printf(fz_context *ctx, fz_output *out, const char *fmt, ...)
{
va_list args;
if (!out) return;
va_start(args, fmt);
fz_vprintf(ctx, out, fmt, args);
va_end(args);
}
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