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-rw-r--r--package/jshn/Makefile32
-rw-r--r--package/jshn/example.txt19
-rw-r--r--package/jshn/files/jshn.sh109
-rw-r--r--package/jshn/src/jshn.c245
4 files changed, 405 insertions, 0 deletions
diff --git a/package/jshn/Makefile b/package/jshn/Makefile
new file mode 100644
index 0000000000..d5d1ea0cad
--- /dev/null
+++ b/package/jshn/Makefile
@@ -0,0 +1,32 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=jshn
+PKG_VERSION:=0.1
+PKG_RELEASE=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/jshn
+ SECTION:=utils
+ CATEGORY:=Utilities
+ DEPENDS:=+libjson
+ TITLE:=JSON SHell Notation
+endef
+
+define Package/jshn/description
+ Library for parsing and generating JSON from shell scripts
+endef
+
+TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include --std=gnu99
+
+define Build/Compile
+ $(TARGET_CC) $(TARGET_CFLAGS) -o $(PKG_BUILD_DIR)/jshn src/jshn.c $(TARGET_LDFLAGS) -ljson
+endef
+
+define Package/jshn/install
+ $(INSTALL_DIR) $(1)/bin $(1)/lib/functions
+ $(INSTALL_BIN) $(PKG_BUILD_DIR)/jshn $(1)/bin
+ $(INSTALL_DATA) ./files/jshn.sh $(1)/lib/functions
+endef
+
+$(eval $(call BuildPackage,jshn))
diff --git a/package/jshn/example.txt b/package/jshn/example.txt
new file mode 100644
index 0000000000..d5ab1c4d23
--- /dev/null
+++ b/package/jshn/example.txt
@@ -0,0 +1,19 @@
+. /lib/functions/jshn.sh
+
+# generating json data
+json_init
+json_add_string "msg" "Hello, world!"
+json_add_object "test"
+json_add_int "testdata" "1"
+json_close_object
+MSG=`json_dump`
+# MSG now contains: { "msg": "Hello, world!", "test": { "testdata": 1 } }
+
+
+# parsing json data
+json_load "$MSG"
+json_select test
+json_get_var var1 testdata
+json_select ..
+json_get_var var2 msg
+echo "msg: $var2 - testdata: $var1"
diff --git a/package/jshn/files/jshn.sh b/package/jshn/files/jshn.sh
new file mode 100644
index 0000000000..2dddfe8bf6
--- /dev/null
+++ b/package/jshn/files/jshn.sh
@@ -0,0 +1,109 @@
+[ -z "$N" ] && . /etc/functions.sh
+
+# functions for parsing and generating json
+
+json_init() {
+ [ -n "$JSON_UNSET" ] && eval "unset $JSON_UNSET"
+ export -- JSON_SEQ=0 JSON_STACK= JSON_CUR="JSON_VAR" JSON_UNSET=
+}
+
+json_add_generic() {
+ local type="$1"
+ local var="$2"
+ local val="$3"
+ local cur="${4:-$JSON_CUR}"
+
+ export ${NO_EXPORT:+-n} -- "${cur}_$var=$val"
+ export ${NO_EXPORT:+-n} -- "TYPE_${cur}_$var=$type"
+ append JSON_UNSET "${cur}_$var TYPE_${cur}_$var"
+ append "KEYS_${cur}" "$var"
+}
+
+json_add_table() {
+ JSON_SEQ=$(($JSON_SEQ + 1))
+ append JSON_STACK "$JSON_CUR"
+ local table="JSON_TABLE$JSON_SEQ"
+ export ${NO_EXPORT:+-n} -- "UP_$table=$JSON_CUR"
+ JSON_CUR="$table"
+}
+
+json_add_object() {
+ local cur="$JSON_CUR"
+ json_add_table
+ json_add_generic object "$1" "$JSON_CUR" "$cur"
+}
+
+json_close_object() {
+ local oldstack="$JSON_STACK"
+ export "KEYS_${JSON_CUR}"
+ JSON_CUR="${JSON_STACK##* }"
+ JSON_STACK="${JSON_STACK% *}"
+ [[ "$oldstack" == "$JSON_STACK" ]] && JSON_STACK=
+}
+
+json_add_array() {
+ local cur="$JSON_CUR"
+ json_add_table
+ json_add_generic array "$1" "$JSON_CUR" "$cur"
+}
+
+json_close_array() {
+ json_close_object
+}
+
+json_add_string() {
+ json_add_generic string "$1" "$2"
+}
+
+json_add_int() {
+ json_add_generic int "$1" "$2"
+}
+
+json_add_boolean() {
+ json_add_generic boolean "$1" "$2"
+}
+
+# functions read access to json variables
+
+json_load() {
+ eval `jshn -r "$1"`
+}
+
+json_dump() {
+ jshn -w
+}
+
+json_get_type() {
+ local dest="$1"
+ local var="$2"
+ eval "export ${NO_EXPORT:+-n} -- \"$dest=\${TYPE_${JSON_CUR}_$var}\""
+}
+
+json_get_var() {
+ local dest="$1"
+ local var="$2"
+ eval "export ${NO_EXPORT:+-n} -- \"$dest=\${${JSON_CUR}_$var}\""
+}
+
+json_select() {
+ local target="$1"
+ local type
+
+ [ -z "$1" ] && {
+ JSON_CUR="JSON_VAR"
+ return
+ }
+ [[ "$1" == ".." ]] && {
+ eval "JSON_CUR=\"\${UP_$JSON_CUR}\""
+ return;
+ }
+ json_get_type type "$target"
+ case "$type" in
+ object|array)
+ json_get_var JSON_CUR "$target"
+ ;;
+ *)
+ echo "WARNING: Variable '$target' does not exist or is not an array/object"
+ ;;
+ esac
+}
diff --git a/package/jshn/src/jshn.c b/package/jshn/src/jshn.c
new file mode 100644
index 0000000000..a2d711f38e
--- /dev/null
+++ b/package/jshn/src/jshn.c
@@ -0,0 +1,245 @@
+#include <json/json.h>
+#include <libubox/list.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <ctype.h>
+#include <getopt.h>
+
+#define MAX_VARLEN 256
+
+static int add_json_element(const char *key, json_object *obj);
+
+static int add_json_object(json_object *obj)
+{
+ int ret = 0;
+
+ json_object_object_foreach(obj, key, val) {
+ ret = add_json_element(key, val);
+ if (ret)
+ break;
+ }
+ return ret;
+}
+
+static int add_json_array(struct array_list *a)
+{
+ char seq[12];
+ int i, len;
+ int ret;
+
+ for (i = 0, len = array_list_length(a); i < len; i++) {
+ sprintf(seq, "%d", i);
+ ret = add_json_element(seq, array_list_get_idx(a, i));
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void add_json_string(const char *str)
+{
+ char *ptr = (char *) str;
+ int len;
+ char *c;
+
+ while ((c = strchr(ptr, '\'')) != NULL) {
+ len = c - ptr;
+ if (len > 0)
+ fwrite(ptr, len, 1, stdout);
+ ptr = c + 1;
+ c = "'\\''";
+ fwrite(c, strlen(c), 1, stdout);
+ }
+ len = strlen(ptr);
+ if (len > 0)
+ fwrite(ptr, len, 1, stdout);
+}
+
+static void write_key_string(const char *key)
+{
+ while (*key) {
+ putc(isalnum(*key) ? *key : '_', stdout);
+ key++;
+ }
+}
+
+static int add_json_element(const char *key, json_object *obj)
+{
+ char *type;
+
+ if (!obj)
+ return -1;
+
+ switch (json_object_get_type(obj)) {
+ case json_type_object:
+ type = "object";
+ break;
+ case json_type_array:
+ type = "array";
+ break;
+ case json_type_string:
+ type = "string";
+ break;
+ case json_type_boolean:
+ type = "boolean";
+ break;
+ case json_type_int:
+ type = "int";
+ break;
+ default:
+ return -1;
+ }
+
+ fprintf(stdout, "json_add_%s '", type);
+ write_key_string(key);
+
+ switch (json_object_get_type(obj)) {
+ case json_type_object:
+ fprintf(stdout, "';\n");
+ add_json_object(obj);
+ fprintf(stdout, "json_close_object;\n");
+ break;
+ case json_type_array:
+ fprintf(stdout, "';\n");
+ add_json_array(json_object_get_array(obj));
+ fprintf(stdout, "json_close_array;\n");
+ break;
+ case json_type_string:
+ fprintf(stdout, "' '");
+ add_json_string(json_object_get_string(obj));
+ fprintf(stdout, "';\n");
+ break;
+ case json_type_boolean:
+ fprintf(stdout, "' %d;\n", json_object_get_boolean(obj));
+ break;
+ case json_type_int:
+ fprintf(stdout, "' %d;\n", json_object_get_int(obj));
+ break;
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+static int jshn_parse(const char *str)
+{
+ json_object *obj;
+
+ obj = json_tokener_parse(str);
+ if (is_error(obj) || json_object_get_type(obj) != json_type_object) {
+ fprintf(stderr, "Failed to parse message data\n");
+ return 1;
+ }
+ fprintf(stdout, "json_init;\n");
+ add_json_object(obj);
+ fflush(stdout);
+
+ return 0;
+}
+
+static char *get_keys(const char *prefix)
+{
+ char *keys;
+
+ keys = alloca(strlen(prefix) + sizeof("KEYS_") + 1);
+ sprintf(keys, "KEYS_%s", prefix);
+ return getenv(keys);
+}
+
+static void get_var(const char *prefix, const char *name, char **var, char **type)
+{
+ char *tmpname;
+
+ tmpname = alloca(strlen(prefix) + 1 + strlen(name) + 1 + sizeof("TYPE_"));
+ sprintf(tmpname, "TYPE_%s_%s", prefix, name);
+ *var = getenv(tmpname + 5);
+ *type = getenv(tmpname);
+}
+
+static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array);
+
+static void jshn_add_object_var(json_object *obj, bool array, const char *prefix, const char *name)
+{
+ json_object *new;
+ char *var, *type;
+
+ get_var(prefix, name, &var, &type);
+ if (!var || !type)
+ return;
+
+ if (!strcmp(type, "array")) {
+ new = json_object_new_array();
+ jshn_add_objects(new, var, true);
+ } else if (!strcmp(type, "object")) {
+ new = json_object_new_object();
+ jshn_add_objects(new, var, false);
+ } else if (!strcmp(type, "string")) {
+ new = json_object_new_string(var);
+ } else if (!strcmp(type, "int")) {
+ new = json_object_new_int(atoi(var));
+ } else if (!strcmp(type, "boolean")) {
+ new = json_object_new_boolean(!!atoi(var));
+ } else {
+ return;
+ }
+
+ if (array)
+ json_object_array_add(obj, new);
+ else
+ json_object_object_add(obj, name, new);
+}
+
+static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array)
+{
+ char *keys, *key, *brk;
+
+ keys = get_keys(prefix);
+ if (!keys || !obj)
+ goto out;
+
+ for (key = strtok_r(keys, " ", &brk); key;
+ key = strtok_r(NULL, " ", &brk)) {
+ jshn_add_object_var(obj, array, prefix, key);
+ }
+
+out:
+ return obj;
+}
+
+static int jshn_format(void)
+{
+ json_object *obj;
+
+ obj = json_object_new_object();
+ jshn_add_objects(obj, "JSON_VAR", false);
+ fprintf(stdout, "%s\n", json_object_to_json_string(obj));
+ json_object_put(obj);
+ return 0;
+}
+
+static int usage(const char *progname)
+{
+ fprintf(stderr, "Usage: %s -r <message>|-w\n", progname);
+ return 2;
+}
+
+int main(int argc, char **argv)
+{
+ int ch;
+
+ while ((ch = getopt(argc, argv, "r:w")) != -1) {
+ switch(ch) {
+ case 'r':
+ return jshn_parse(optarg);
+ case 'w':
+ return jshn_format();
+ default:
+ return usage(argv[0]);
+ }
+ }
+ return usage(argv[0]);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 12:23:42 +0000