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+ id EAA873034D4; Mon, 23 Jul 2012 12:39:50 +0200 (CEST)\r
+From: craven@gmx.net\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH v8 2/3] Add structured output formatter for JSON and plain\r
+ text (but don't use them yet).\r
+Date: Mon, 23 Jul 2012 12:39:45 +0200\r
+Message-Id: <1343039986-2732-3-git-send-email-craven@gmx.net>\r
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+\r
+From: <craven@gmx.net>\r
+\r
+Using the new structured printer support in sprinter.h, implement\r
+sprinter_json_create, which returns a new JSON structured output\r
+formatter. The formatter prints output similar to the existing JSON, but\r
+with differences in whitespace (mostly newlines, --output=summary prints\r
+the entire message summary on one line, not split across multiple lines).\r
+\r
+Also implement a "structured" formatter for plain text that prints\r
+prefixed strings, to be used with notmuch-search.c plain text output.\r
+---\r
+ Makefile.local | 2 +\r
+ sprinter-json.c | 187 ++++++++++++++++++++++++++++++++++++++++++++++++\r
+ sprinter-text.c | 126 ++++++++++++++++++++++++++++++++\r
+ sprinter.h | 10 +++\r
+ 4 files changed, 325 insertions(+)\r
+\r
+diff --git a/Makefile.local b/Makefile.local\r
+index a890df2..296995d 100644\r
+--- a/Makefile.local\r
++++ b/Makefile.local\r
+@@ -290,6 +290,8 @@ notmuch_client_srcs = \\r
+ notmuch-show.c \\r
+ notmuch-tag.c \\r
+ notmuch-time.c \\r
++ sprinter-json.c \\r
++ sprinter-text.c \\r
+ query-string.c \\r
+ mime-node.c \\r
+ crypto.c \\r
+diff --git a/sprinter-json.c b/sprinter-json.c\r
+new file mode 100644\r
+index 0000000..4649655\r
+--- /dev/null\r
++++ b/sprinter-json.c\r
+@@ -0,0 +1,187 @@\r
++#include <stdbool.h>\r
++#include <stdio.h>\r
++#include <talloc.h>\r
++#include "sprinter.h"\r
++\r
++struct sprinter_json {\r
++ struct sprinter vtable;\r
++ FILE *stream;\r
++ /* Top of the state stack, or NULL if the printer is not currently\r
++ * inside any aggregate types. */\r
++ struct json_state *state;\r
++\r
++ /* A flag to signify that a separator should be inserted in the\r
++ * output as soon as possible.\r
++ */\r
++ notmuch_bool_t insert_separator;\r
++};\r
++\r
++struct json_state {\r
++ struct json_state *parent;\r
++ /* True if nothing has been printed in this aggregate yet.\r
++ * Suppresses the comma before a value. */\r
++ notmuch_bool_t first;\r
++ /* The character that closes the current aggregate. */\r
++ char close;\r
++};\r
++\r
++/* Helper function to set up the stream to print a value. If this\r
++ * value follows another value, prints a comma. */\r
++static struct sprinter_json *\r
++json_begin_value (struct sprinter *sp)\r
++{\r
++ struct sprinter_json *spj = (struct sprinter_json *) sp;\r
++\r
++ if (spj->state) {\r
++ if (! spj->state->first) {\r
++ fputc (',', spj->stream);\r
++ if (spj->insert_separator) {\r
++ fputc ('\n', spj->stream);\r
++ spj->insert_separator = FALSE;\r
++ } else {\r
++ fputc (' ', spj->stream);\r
++ }\r
++ } else {\r
++ spj->state->first = FALSE;\r
++ }\r
++ }\r
++ return spj;\r
++}\r
++\r
++/* Helper function to begin an aggregate type. Prints the open\r
++ * character and pushes a new state frame. */\r
++static void\r
++json_begin_aggregate (struct sprinter *sp, char open, char close)\r
++{\r
++ struct sprinter_json *spj = json_begin_value (sp);\r
++ struct json_state *state = talloc (spj, struct json_state);\r
++\r
++ fputc (open, spj->stream);\r
++ state->parent = spj->state;\r
++ state->first = TRUE;\r
++ state->close = close;\r
++ spj->state = state;\r
++}\r
++\r
++static void\r
++json_begin_map (struct sprinter *sp)\r
++{\r
++ json_begin_aggregate (sp, '{', '}');\r
++}\r
++\r
++static void\r
++json_begin_list (struct sprinter *sp)\r
++{\r
++ json_begin_aggregate (sp, '[', ']');\r
++}\r
++\r
++static void\r
++json_end (struct sprinter *sp)\r
++{\r
++ struct sprinter_json *spj = (struct sprinter_json *) sp;\r
++ struct json_state *state = spj->state;\r
++\r
++ fputc (spj->state->close, spj->stream);\r
++ spj->state = state->parent;\r
++ talloc_free (state);\r
++ if (spj->state == NULL)\r
++ fputc ('\n', spj->stream);\r
++}\r
++\r
++static void\r
++json_string (struct sprinter *sp, const char *val)\r
++{\r
++ static const char *const escapes[] = {\r
++ ['\"'] = "\\\"", ['\\'] = "\\\\", ['\b'] = "\\b",\r
++ ['\f'] = "\\f", ['\n'] = "\\n", ['\t'] = "\\t"\r
++ };\r
++ struct sprinter_json *spj = json_begin_value (sp);\r
++\r
++ fputc ('"', spj->stream);\r
++ for (; *val; ++val) {\r
++ unsigned char ch = *val;\r
++ if (ch < ARRAY_SIZE (escapes) && escapes[ch])\r
++ fputs (escapes[ch], spj->stream);\r
++ else if (ch >= 32)\r
++ fputc (ch, spj->stream);\r
++ else\r
++ fprintf (spj->stream, "\\u%04x", ch);\r
++ }\r
++ fputc ('"', spj->stream);\r
++}\r
++\r
++static void\r
++json_integer (struct sprinter *sp, int val)\r
++{\r
++ struct sprinter_json *spj = json_begin_value (sp);\r
++\r
++ fprintf (spj->stream, "%d", val);\r
++}\r
++\r
++static void\r
++json_boolean (struct sprinter *sp, notmuch_bool_t val)\r
++{\r
++ struct sprinter_json *spj = json_begin_value (sp);\r
++\r
++ fputs (val ? "true" : "false", spj->stream);\r
++}\r
++\r
++static void\r
++json_null (struct sprinter *sp)\r
++{\r
++ struct sprinter_json *spj = json_begin_value (sp);\r
++\r
++ fputs ("null", spj->stream);\r
++}\r
++\r
++static void\r
++json_map_key (struct sprinter *sp, const char *key)\r
++{\r
++ struct sprinter_json *spj = (struct sprinter_json *) sp;\r
++\r
++ json_string (sp, key);\r
++ fputs (": ", spj->stream);\r
++ spj->state->first = TRUE;\r
++}\r
++\r
++static void\r
++json_set_prefix (unused (struct sprinter *sp), unused (const char *name))\r
++{\r
++}\r
++\r
++static void\r
++json_separator (struct sprinter *sp)\r
++{\r
++ struct sprinter_json *spj = (struct sprinter_json *) sp;\r
++\r
++ spj->insert_separator = TRUE;\r
++}\r
++\r
++struct sprinter *\r
++sprinter_json_create (const void *ctx, FILE *stream)\r
++{\r
++ static const struct sprinter_json template = {\r
++ .vtable = {\r
++ .begin_map = json_begin_map,\r
++ .begin_list = json_begin_list,\r
++ .end = json_end,\r
++ .string = json_string,\r
++ .integer = json_integer,\r
++ .boolean = json_boolean,\r
++ .null = json_null,\r
++ .map_key = json_map_key,\r
++ .separator = json_separator,\r
++ .set_prefix = json_set_prefix,\r
++ .is_text_printer = FALSE,\r
++ }\r
++ };\r
++ struct sprinter_json *res;\r
++\r
++ res = talloc (ctx, struct sprinter_json);\r
++ if (! res)\r
++ return NULL;\r
++\r
++ *res = template;\r
++ res->stream = stream;\r
++ return &res->vtable;\r
++}\r
+diff --git a/sprinter-text.c b/sprinter-text.c\r
+new file mode 100644\r
+index 0000000..b208840\r
+--- /dev/null\r
++++ b/sprinter-text.c\r
+@@ -0,0 +1,126 @@\r
++#include <stdbool.h>\r
++#include <stdio.h>\r
++#include <talloc.h>\r
++#include "sprinter.h"\r
++\r
++/* "Structured printer" interface for unstructured text printing.\r
++ * Note that --output=summary is dispatched and formatted in\r
++ * notmuch-search.c, the code in this file is only used for all other\r
++ * output types.\r
++ */\r
++\r
++struct sprinter_text {\r
++ struct sprinter vtable;\r
++ FILE *stream;\r
++\r
++ /* The current prefix to be printed with string/integer/boolean\r
++ * data.\r
++ */\r
++ const char *current_prefix;\r
++\r
++ /* A flag to indicate if this is the first tag. Used in list of tags\r
++ * for summary.\r
++ */\r
++ notmuch_bool_t first_tag;\r
++};\r
++\r
++static void\r
++text_string (struct sprinter *sp, const char *val)\r
++{\r
++ struct sprinter_text *sptxt = (struct sprinter_text *) sp;\r
++\r
++ if (sptxt->current_prefix != NULL)\r
++ fprintf (sptxt->stream, "%s:", sptxt->current_prefix);\r
++\r
++ fputs(val, sptxt->stream);\r
++}\r
++\r
++static void\r
++text_integer (struct sprinter *sp, int val)\r
++{\r
++ struct sprinter_text *sptxt = (struct sprinter_text *) sp;\r
++\r
++ fprintf (sptxt->stream, "%d", val);\r
++}\r
++\r
++static void\r
++text_boolean (struct sprinter *sp, notmuch_bool_t val)\r
++{\r
++ struct sprinter_text *sptxt = (struct sprinter_text *) sp;\r
++\r
++ fputs (val ? "true" : "false", sptxt->stream);\r
++}\r
++\r
++static void\r
++text_separator (struct sprinter *sp)\r
++{\r
++ struct sprinter_text *sptxt = (struct sprinter_text *) sp;\r
++\r
++ fputc ('\n', sptxt->stream);\r
++}\r
++\r
++static void\r
++text_set_prefix (struct sprinter *sp, const char *prefix)\r
++{\r
++ struct sprinter_text *sptxt = (struct sprinter_text *) sp;\r
++\r
++ sptxt->current_prefix = prefix;\r
++}\r
++\r
++/* The structure functions begin_map, begin_list, end and map_key\r
++ * don't do anything in the text formatter.\r
++ */\r
++\r
++static void\r
++text_begin_map (unused (struct sprinter *sp))\r
++{\r
++}\r
++\r
++static void\r
++text_begin_list (unused (struct sprinter *sp))\r
++{\r
++}\r
++\r
++static void\r
++text_end (unused (struct sprinter *sp))\r
++{\r
++}\r
++\r
++static void\r
++text_null (unused (struct sprinter *sp))\r
++{\r
++}\r
++\r
++static void\r
++text_map_key (unused (struct sprinter *sp), unused (const char *key))\r
++{\r
++}\r
++\r
++struct sprinter *\r
++sprinter_text_create (const void *ctx, FILE *stream)\r
++{\r
++ static const struct sprinter_text template = {\r
++ .vtable = {\r
++ .begin_map = text_begin_map,\r
++ .begin_list = text_begin_list,\r
++ .end = text_end,\r
++ .string = text_string,\r
++ .integer = text_integer,\r
++ .boolean = text_boolean,\r
++ .null = text_null,\r
++ .map_key = text_map_key,\r
++ .separator = text_separator,\r
++ .set_prefix = text_set_prefix,\r
++ .is_text_printer = TRUE,\r
++ },\r
++ };\r
++ struct sprinter_text *res;\r
++\r
++ res = talloc (ctx, struct sprinter_text);\r
++ if (! res)\r
++ return NULL;\r
++\r
++ *res = template;\r
++ res->stream = stream;\r
++ return &res->vtable;\r
++}\r
+diff --git a/sprinter.h b/sprinter.h\r
+index 77dc26f..6680d41 100644\r
+--- a/sprinter.h\r
++++ b/sprinter.h\r
+@@ -55,4 +55,14 @@ typedef struct sprinter {\r
+ notmuch_bool_t is_text_printer;\r
+ } sprinter_t;\r
+ \r
++\r
++/* Create a new unstructured printer that emits the default text format\r
++ * for "notmuch search". */\r
++struct sprinter *\r
++sprinter_text_create (const void *ctx, FILE *stream);\r
++\r
++/* Create a new structure printer that emits JSON. */\r
++struct sprinter *\r
++sprinter_json_create (const void *ctx, FILE *stream);\r
++\r
+ #endif // NOTMUCH_SPRINTER_H\r
+-- \r
+1.7.11.2\r
+\r
projects / notmuch-archives.git / commitdiff