Fix libmspack to compile with rbutil

The build system used by rbutil is not very robust: all the files
are eventually compiled to the same directory so we cannot have
two files with the same name (system.c would conflicts with
system.cpp) so rename one file to avoid this. Also change all
include directives to local ones because we don't have to expose
the entire mspack source to inclusion.

Change-Id: I3fe0638d69fdc30566eb9425abfe33c807678b28
Reviewed-on: http://gerrit.rockbox.org/417
Reviewed-by: Dominik Riebeling <Dominik.Riebeling@gmail.com>

1 files changed, 237 insertions, 0 deletions

diff --git a/rbutil/rbutilqt/mspack/system-mspack.c b/rbutil/rbutilqt/mspack/system-mspack.c
new file mode 100644
index 0000000000..a7f4a5c218
--- /dev/null
+++ b/rbutil/rbutilqt/mspack/system-mspack.c
@@ -0,0 +1,237 @@
+/* This file is part of libmspack.
+ * (C) 2003-2004 Stuart Caie.
+ *
+ * libmspack is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License (LGPL) version 2.1
+ *
+ * For further details, see the file COPYING.LIB distributed with libmspack
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "system-mspack.h"
+
+#ifndef LARGEFILE_SUPPORT
+const char *largefile_msg = "library not compiled to support large files.";
+#endif
+
+
+int mspack_version(int entity) {
+  switch (entity) {
+   /* CHM decoder version 1 -> 2 changes:
+    * - added mschmd_sec_mscompressed::spaninfo
+    * - added mschmd_header::first_pmgl
+    * - added mschmd_header::last_pmgl
+    * - added mschmd_header::chunk_cache;
+    */
+  case MSPACK_VER_MSCHMD:
+    return 2;
+  case MSPACK_VER_LIBRARY:
+  case MSPACK_VER_SYSTEM:
+  case MSPACK_VER_MSCABD:
+  case MSPACK_VER_MSSZDDD:
+  case MSPACK_VER_MSKWAJD:
+    return 1;
+  case MSPACK_VER_MSCABC:
+  case MSPACK_VER_MSCHMC:
+  case MSPACK_VER_MSLITD:
+  case MSPACK_VER_MSLITC:
+  case MSPACK_VER_MSHLPD:
+  case MSPACK_VER_MSHLPC:
+  case MSPACK_VER_MSSZDDC:
+  case MSPACK_VER_MSKWAJC:
+    return 0;
+  }
+  return -1;
+}
+
+int mspack_sys_selftest_internal(int offt_size) {
+  return (sizeof(off_t) == offt_size) ? MSPACK_ERR_OK : MSPACK_ERR_SEEK;
+}
+
+/* validates a system structure */
+int mspack_valid_system(struct mspack_system *sys) {
+  return (sys != NULL) && (sys->open != NULL) && (sys->close != NULL) &&
+    (sys->read != NULL) && (sys->write != NULL) && (sys->seek != NULL) &&
+    (sys->tell != NULL) && (sys->message != NULL) && (sys->alloc != NULL) &&
+    (sys->free != NULL) && (sys->copy != NULL) && (sys->null_ptr == NULL);
+}
+
+/* returns the length of a file opened for reading */
+int mspack_sys_filelen(struct mspack_system *system,
+		       struct mspack_file *file, off_t *length)
+{
+  off_t current;
+
+  if (!system || !file || !length) return MSPACK_ERR_OPEN;
+
+  /* get current offset */
+  current = system->tell(file);
+
+  /* seek to end of file */
+  if (system->seek(file, (off_t) 0, MSPACK_SYS_SEEK_END)) {
+    return MSPACK_ERR_SEEK;
+  }
+
+  /* get offset of end of file */
+  *length = system->tell(file);
+
+  /* seek back to original offset */
+  if (system->seek(file, current, MSPACK_SYS_SEEK_START)) {
+    return MSPACK_ERR_SEEK;
+  }
+
+  return MSPACK_ERR_OK;
+}
+
+
+
+/* definition of mspack_default_system -- if the library is compiled with
+ * MSPACK_NO_DEFAULT_SYSTEM, no default system will be provided. Otherwise,
+ * an appropriate default system (e.g. the standard C library, or some native
+ * API calls)
+ */
+
+#ifdef MSPACK_NO_DEFAULT_SYSTEM
+struct mspack_system *mspack_default_system = NULL;
+#else
+
+/* implementation of mspack_default_system for standard C library */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+struct mspack_file_p {
+  FILE *fh;
+  const char *name;
+};
+
+static struct mspack_file *msp_open(struct mspack_system *self,
+				    const char *filename, int mode)
+{
+  struct mspack_file_p *fh;
+  const char *fmode;
+
+  switch (mode) {
+  case MSPACK_SYS_OPEN_READ:   fmode = "rb";  break;
+  case MSPACK_SYS_OPEN_WRITE:  fmode = "wb";  break;
+  case MSPACK_SYS_OPEN_UPDATE: fmode = "r+b"; break;
+  case MSPACK_SYS_OPEN_APPEND: fmode = "ab";  break;
+  default: return NULL;
+  }
+
+  if ((fh = (struct mspack_file_p *) malloc(sizeof(struct mspack_file_p)))) {
+    fh->name = filename;
+    if ((fh->fh = fopen(filename, fmode))) return (struct mspack_file *) fh;
+    free(fh);
+  }
+  return NULL;
+}
+
+static void msp_close(struct mspack_file *file) {
+  struct mspack_file_p *self = (struct mspack_file_p *) file;
+  if (self) {
+    fclose(self->fh);
+    free(self);
+  }
+}
+
+static int msp_read(struct mspack_file *file, void *buffer, int bytes) {
+  struct mspack_file_p *self = (struct mspack_file_p *) file;
+  if (self && buffer && bytes >= 0) {
+    size_t count = fread(buffer, 1, (size_t) bytes, self->fh);
+    if (!ferror(self->fh)) return (int) count;
+  }
+  return -1;
+}
+
+static int msp_write(struct mspack_file *file, void *buffer, int bytes) {
+  struct mspack_file_p *self = (struct mspack_file_p *) file;
+  if (self && buffer && bytes >= 0) {
+    size_t count = fwrite(buffer, 1, (size_t) bytes, self->fh);
+    if (!ferror(self->fh)) return (int) count;
+  }
+  return -1;
+}
+
+static int msp_seek(struct mspack_file *file, off_t offset, int mode) {
+  struct mspack_file_p *self = (struct mspack_file_p *) file;
+  if (self) {
+    switch (mode) {
+    case MSPACK_SYS_SEEK_START: mode = SEEK_SET; break;
+    case MSPACK_SYS_SEEK_CUR:   mode = SEEK_CUR; break;
+    case MSPACK_SYS_SEEK_END:   mode = SEEK_END; break;
+    default: return -1;
+    }
+#ifdef HAVE_FSEEKO
+    return fseeko(self->fh, offset, mode);
+#else
+    return fseek(self->fh, offset, mode);
+#endif
+  }
+  return -1;
+}
+
+static off_t msp_tell(struct mspack_file *file) {
+  struct mspack_file_p *self = (struct mspack_file_p *) file;
+#ifdef HAVE_FSEEKO
+  return (self) ? (off_t) ftello(self->fh) : 0;
+#else
+  return (self) ? (off_t) ftell(self->fh) : 0;
+#endif
+}
+
+static void msp_msg(struct mspack_file *file, const char *format, ...) {
+  va_list ap;
+  if (file) fprintf(stderr, "%s: ", ((struct mspack_file_p *) file)->name);
+  va_start(ap, format);
+  vfprintf(stderr, format, ap);
+  va_end(ap);
+  fputc((int) '\n', stderr);
+  fflush(stderr);
+}
+
+static void *msp_alloc(struct mspack_system *self, size_t bytes) {
+#ifdef DEBUG
+  /* make uninitialised data obvious */
+  char *buf = malloc(bytes + 8);
+  if (buf) memset(buf, 0xDC, bytes);
+  *((size_t *)buf) = bytes;
+  return &buf[8];
+#else
+  return malloc(bytes);
+#endif
+}
+
+static void msp_free(void *buffer) {
+#ifdef DEBUG
+  char *buf = buffer;
+  size_t bytes;
+  if (buf) {
+    buf -= 8;
+    bytes = *((size_t *)buf);
+    /* make freed data obvious */
+    memset(buf, 0xED, bytes);
+    free(buf);
+  }
+#else
+  free(buffer);
+#endif
+}
+
+static void msp_copy(void *src, void *dest, size_t bytes) {
+  memcpy(dest, src, bytes);
+}
+
+static struct mspack_system msp_system = {
+  &msp_open, &msp_close, &msp_read,  &msp_write, &msp_seek,
+  &msp_tell, &msp_msg, &msp_alloc, &msp_free, &msp_copy, NULL
+};
+
+struct mspack_system *mspack_default_system = &msp_system;
+
+#endif