[Libguestfs] [PATCH 1/3] src: generate code for printing contents of structs
Pino Toscano
ptoscano at redhat.com
Wed Feb 24 12:52:02 UTC 2016
Extend the generator to generate a source (and the header for it) with
functions that print the content of a guestfs struct. The code is
modelled after the code for it in fish.ml, although made a bit more
generic (destination FILE*, line separator) so it can be used also in
the library, when tracing.
This just introduces the new code and builds it as part of the helper
libutils.la.
---
.gitignore | 2 +
generator/c.ml | 124 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
generator/c.mli | 2 +
generator/main.ml | 2 +
po/POTFILES | 1 +
src/Makefile.am | 6 ++-
6 files changed, 136 insertions(+), 1 deletion(-)
diff --git a/.gitignore b/.gitignore
index 40bebb3..1493011 100644
--- a/.gitignore
+++ b/.gitignore
@@ -468,6 +468,8 @@ Makefile.in
/src/structs-compare.c
/src/structs-copy.c
/src/structs-free.c
+/src/structs-print.c
+/src/structs-print.h
/src/test-utils
/stamp-h1
/sysprep/.depend
diff --git a/generator/c.ml b/generator/c.ml
index 417e2bc..9af4529 100644
--- a/generator/c.ml
+++ b/generator/c.ml
@@ -1204,6 +1204,130 @@ and generate_client_structs_cleanup () =
) structs
+(* Generate structs-print.c file. *)
+and generate_client_structs_print_c () =
+ generate_header CStyle LGPLv2plus;
+
+ pr "\
+#include <config.h>
+
+#include <inttypes.h>
+
+#include \"c-ctype.h\"
+
+#include \"guestfs.h\"
+#include \"structs-print.h\"
+
+";
+
+ let write_structs =
+ List.iter (
+ fun { s_name = typ; s_cols = cols } ->
+ let needs_i =
+ List.exists (function (_, (FUUID|FBuffer)) -> true | _ -> false) cols in
+
+ pr "void\n";
+ pr "guestfs_int_print_%s_indent (struct guestfs_%s *%s, FILE *dest, const char *linesep, const char *indent)\n"
+ typ typ typ;
+ pr "{\n";
+ if needs_i then (
+ pr " size_t i;\n";
+ pr "\n"
+ );
+ List.iter (
+ function
+ | name, FString ->
+ pr " fprintf (dest, \"%%s%s: %%s%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FUUID ->
+ pr " fprintf (dest, \"%%s%s: \", indent);\n" name;
+ pr " for (i = 0; i < 32; ++i)\n";
+ pr " fprintf (dest, \"%%c\", %s->%s[i]);\n" typ name;
+ pr " fprintf (dest, \"%%s\", linesep);\n"
+ | name, FBuffer ->
+ pr " fprintf (dest, \"%%s%s: \", indent);\n" name;
+ pr " for (i = 0; i < %s->%s_len; ++i)\n" typ name;
+ pr " if (c_isprint (%s->%s[i]))\n" typ name;
+ pr " fprintf (dest, \"%%c\", %s->%s[i]);\n" typ name;
+ pr " else\n";
+ pr " fprintf (dest, \"\\\\x%%02x\", (unsigned) %s->%s[i]);\n"
+ typ name;
+ pr " fprintf (dest, \"%%s\", linesep);\n"
+ | name, (FUInt64|FBytes) ->
+ pr " fprintf (dest, \"%%s%s: %%\" PRIu64 \"%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FInt64 ->
+ pr " fprintf (dest, \"%%s%s: %%\" PRIi64 \"%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FUInt32 ->
+ pr " fprintf (dest, \"%%s%s: %%\" PRIu32 \"%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FInt32 ->
+ pr " fprintf (dest, \"%%s%s: %%\" PRIi32 \"%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FChar ->
+ pr " fprintf (dest, \"%%s%s: %%c%%s\", indent, %s->%s, linesep);\n"
+ name typ name
+ | name, FOptPercent ->
+ pr " if (%s->%s >= 0)\n" typ name;
+ pr " fprintf (dest, \"%%s%s: %%g %%%%%%s\", indent, (double) %s->%s, linesep);\n"
+ name typ name;
+ pr " else\n";
+ pr " fprintf (dest, \"%%s%s: %%s\", indent, linesep);\n" name
+ ) cols;
+ pr "}\n";
+ pr "\n";
+ ) in
+
+ write_structs external_structs;
+
+ pr "\
+#if GUESTFS_PRIVATE
+
+";
+
+ write_structs internal_structs;
+
+ pr "\
+#endif /* End of GUESTFS_PRIVATE. */
+"
+
+(* Generate structs-print.h file. *)
+and generate_client_structs_print_h () =
+ generate_header CStyle LGPLv2plus;
+
+ pr "\
+#ifndef GUESTFS_INTERNAL_STRUCTS_PRINT_H_
+#define GUESTFS_INTERNAL_STRUCTS_PRINT_H_
+
+#include <stdio.h>
+
+";
+
+ let write_structs =
+ List.iter (
+ fun { s_name = name } ->
+ pr "extern void guestfs_int_print_%s_indent (struct guestfs_%s *%s, FILE *dest, const char *linesep, const char *indent);\n"
+ name name name
+ ) in
+
+ write_structs external_structs;
+
+ pr "\
+
+#if GUESTFS_PRIVATE
+
+";
+
+ write_structs internal_structs;
+
+ pr "\
+
+#endif /* End of GUESTFS_PRIVATE. */
+
+#endif /* GUESTFS_INTERNAL_STRUCTS_PRINT_H_ */
+"
+
(* Generate the client-side dispatch stubs. *)
and generate_client_actions hash () =
generate_header CStyle LGPLv2plus;
diff --git a/generator/c.mli b/generator/c.mli
index 9a261a4..156b244 100644
--- a/generator/c.mli
+++ b/generator/c.mli
@@ -32,6 +32,8 @@ val generate_client_structs_cleanup : unit -> unit
val generate_client_structs_compare : unit -> unit
val generate_client_structs_copy : unit -> unit
val generate_client_structs_free : unit -> unit
+val generate_client_structs_print_h : unit -> unit
+val generate_client_structs_print_c : unit -> unit
val generate_event_string_c : unit -> unit
val generate_guestfs_h : unit -> unit
val generate_internal_actions_h : unit -> unit
diff --git a/generator/main.ml b/generator/main.ml
index 63a5d25..8d08d83 100644
--- a/generator/main.ml
+++ b/generator/main.ml
@@ -99,6 +99,8 @@ Run it from the top source directory using the command
output_to "src/structs-copy.c" generate_client_structs_copy;
output_to "src/structs-free.c" generate_client_structs_free;
output_to "src/structs-cleanup.c" generate_client_structs_cleanup;
+ output_to "src/structs-print.c" generate_client_structs_print_c;
+ output_to "src/structs-print.h" generate_client_structs_print_h;
output_to "src/actions-variants.c" generate_client_actions_variants;
for i = 0 to nr_actions_files-1 do
diff --git a/po/POTFILES b/po/POTFILES
index 2a1e313..0fb99b0 100644
--- a/po/POTFILES
+++ b/po/POTFILES
@@ -353,6 +353,7 @@ src/structs-cleanup.c
src/structs-compare.c
src/structs-copy.c
src/structs-free.c
+src/structs-print.c
src/test-utils.c
src/tmpdirs.c
src/utils.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 3ebb7f5..60641bf 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -46,7 +46,9 @@ generator_built = \
structs-cleanup.c \
structs-compare.c \
structs-copy.c \
- structs-free.c
+ structs-free.c \
+ structs-print.c \
+ structs-print.h
BUILT_SOURCES = \
$(generator_built) \
@@ -226,6 +228,8 @@ endif
libutils_la_SOURCES = \
cleanup.c \
structs-cleanup.c \
+ structs-print.c \
+ structs-print.h \
utils.c
libutils_la_CPPFLAGS = $(libguestfs_la_CPPFLAGS)
libutils_la_CFLAGS = $(libguestfs_la_CFLAGS)
--
2.5.0
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