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/*
* plist.c
* Copyright (C) John Stebbins 2008-2018 <stebbins@stebbins>
*
* plist.c is free software.
*
* You may redistribute it and/or modify it under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* plist.c is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with main.c. If not, write to:
* The Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <inttypes.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <glib-object.h>
#include "values.h"
#include "plist.h"
#define BUF_SZ (128*1024)
static gchar *preamble =
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
"<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n"
"<plist version=\"1.0\">\n";
static gchar *postfix =
"</plist>\n";
enum
{
P_NONE = 0,
P_PLIST,
P_KEY,
P_ARRAY,
P_DICT,
P_INTEGER,
P_REAL,
P_STRING,
P_DATE,
P_TRUE,
P_FALSE,
P_DATA,
};
typedef struct
{
gchar *tag;
gint id;
} tag_map_t;
static tag_map_t tag_map[] =
{
{"plist", P_PLIST},
{"key", P_KEY},
{"array", P_ARRAY},
{"dict", P_DICT},
{"integer", P_INTEGER},
{"real", P_REAL},
{"string", P_STRING},
{"date", P_DATE},
{"true", P_TRUE},
{"false", P_FALSE},
{"data", P_DATA},
};
#define TAG_MAP_SZ (sizeof(tag_map)/sizeof(tag_map_t))
typedef struct
{
gchar *key;
gchar *value;
GhbValue *plist;
GQueue *stack;
GQueue *tag_stack;
gboolean closed_top;
} parse_data_t;
static void
start_element(
GMarkupParseContext *ctx,
const gchar *name,
const gchar **attr_names,
const gchar **attr_values,
gpointer ud,
GError **error)
{
parse_data_t *pd = (parse_data_t*)ud;
union
{
gint id;
gpointer pid;
} id;
gint ii;
// Check to see if the first element found has been closed
// If so, ignore any junk following it.
if (pd->closed_top)
return;
for (ii = 0; ii < TAG_MAP_SZ; ii++)
{
if (strcmp(name, tag_map[ii].tag) == 0)
{
id.id = tag_map[ii].id;
break;
}
}
if (ii == TAG_MAP_SZ)
{
g_warning("Unrecognized start tag (%s)", name);
return;
}
g_queue_push_head(pd->tag_stack, id.pid);
GhbType gtype = 0;
GhbValue *gval = NULL;
GhbValue *current = g_queue_peek_head(pd->stack);
switch (id.id)
{
case P_PLIST:
{ // Ignore
} break;
case P_KEY:
{
if (pd->key) g_free(pd->key);
pd->key = NULL;
} break;
case P_DICT:
{
gval = ghb_dict_new();
g_queue_push_head(pd->stack, gval);
} break;
case P_ARRAY:
{
gval = ghb_array_new();
g_queue_push_head(pd->stack, gval);
} break;
case P_INTEGER:
{
} break;
case P_REAL:
{
} break;
case P_STRING:
{
} break;
case P_DATE:
{
} break;
case P_TRUE:
{
} break;
case P_FALSE:
{
} break;
case P_DATA:
{
} break;
}
// Add the element to the current container
if (gval)
{ // There's an element to add
if (current == NULL)
{
pd->plist = gval;
return;
}
gtype = ghb_value_type(current);
if (gtype == GHB_ARRAY)
{
ghb_array_append(current, gval);
}
else if (gtype == GHB_DICT)
{
if (pd->key == NULL)
{
g_warning("No key for dictionary item");
ghb_value_free(&gval);
}
else
{
ghb_dict_set(current, pd->key, gval);
}
}
else
{
g_error("Invalid container type. This shouldn't happen");
}
}
}
static void
end_element(
GMarkupParseContext *ctx,
const gchar *name,
gpointer ud,
GError **error)
{
parse_data_t *pd = (parse_data_t*)ud;
gint id;
union
{
gint id;
gpointer pid;
} start_id;
gint ii;
// Check to see if the first element found has been closed
// If so, ignore any junk following it.
if (pd->closed_top)
return;
for (ii = 0; ii < TAG_MAP_SZ; ii++)
{
if (strcmp(name, tag_map[ii].tag) == 0)
{
id = tag_map[ii].id;
break;
}
}
if (ii == TAG_MAP_SZ)
{
g_warning("Unrecognized start tag (%s)", name);
return;
}
start_id.pid = g_queue_pop_head(pd->tag_stack);
if (start_id.id != id)
g_warning("start tag != end tag: (%s %d) %d", name, id, id);
GhbValue *gval = NULL;
GhbValue *current = g_queue_peek_head(pd->stack);
GhbType gtype = 0;
switch (id)
{
case P_PLIST:
{ // Ignore
} break;
case P_KEY:
{
if (pd->key) g_free(pd->key);
pd->key = g_strdup(pd->value);
return;
} break;
case P_DICT:
{
g_queue_pop_head(pd->stack);
} break;
case P_ARRAY:
{
g_queue_pop_head(pd->stack);
} break;
case P_INTEGER:
{
gint64 val = g_strtod(pd->value, NULL);
gval = ghb_int_value_new(val);
} break;
case P_REAL:
{
gdouble val = g_strtod(pd->value, NULL);
gval = ghb_double_value_new(val);
} break;
case P_STRING:
{
gval = ghb_string_value_new(pd->value);
} break;
case P_TRUE:
{
gval = ghb_bool_value_new(TRUE);
} break;
case P_FALSE:
{
gval = ghb_bool_value_new(FALSE);
} break;
default:
{
g_message("Unhandled plist type %d", id);
} break;
}
if (gval)
{
// Get the top of the data structure stack and if it's an array
// or dict, add the current element
if (current == NULL)
{
pd->plist = gval;
pd->closed_top = TRUE;
return;
}
gtype = ghb_value_type(current);
if (gtype == GHB_ARRAY)
{
ghb_array_append(current, gval);
}
else if (gtype == GHB_DICT)
{
if (pd->key == NULL)
{
g_warning("No key for dictionary item");
ghb_value_free(&gval);
}
else
{
ghb_dict_set(current, pd->key, gval);
}
}
else
{
g_error("Invalid container type. This shouldn't happen");
}
}
if (g_queue_is_empty(pd->stack))
pd->closed_top = TRUE;
}
static void
text_data(
GMarkupParseContext *ctx,
const gchar *text,
gsize len,
gpointer ud,
GError **error)
{
parse_data_t *pd = (parse_data_t*)ud;
if (pd->value) g_free(pd->value);
pd->value = g_strdup(text);
}
static void
passthrough(
GMarkupParseContext *ctx,
const gchar *text,
gsize len,
gpointer ud,
GError **error)
{
//parse_data_t *pd = (parse_data_t*)ud;
//g_debug("passthrough %s", text);
}
static void
parse_error(GMarkupParseContext *ctx, GError *error, gpointer ud)
{
g_warning("Plist parse error: %s", error->message);
}
// This is required or the parser crashes
static void
destroy_notify(gpointer data)
{ // Do nothing
//g_debug("destroy parser");
}
GhbValue*
ghb_plist_parse(const gchar *buf, gssize len)
{
GMarkupParseContext *ctx;
GMarkupParser parser;
parse_data_t pd;
GError *err = NULL;
pd.stack = g_queue_new();
pd.tag_stack = g_queue_new();
pd.key = NULL;
pd.value = NULL;
pd.plist = NULL;
pd.closed_top = FALSE;
parser.start_element = start_element;
parser.end_element = end_element;
parser.text = text_data;
parser.passthrough = passthrough;
parser.error = parse_error;
ctx = g_markup_parse_context_new(&parser, 0, &pd, destroy_notify);
g_markup_parse_context_parse(ctx, buf, len, &err);
g_markup_parse_context_end_parse(ctx, &err);
g_markup_parse_context_free(ctx);
if (pd.key) g_free(pd.key);
if (pd.value) g_free(pd.value);
g_queue_free(pd.stack);
g_queue_free(pd.tag_stack);
return pd.plist;
}
GhbValue*
ghb_plist_parse_file(const gchar *filename)
{
gchar *buffer;
size_t size;
GhbValue *gval;
FILE *fd;
fd = g_fopen(filename, "r");
if (fd == NULL)
{
g_warning("Plist parse: failed to open %s", filename);
return NULL;
}
fseek(fd, 0, SEEK_END);
size = ftell(fd);
fseek(fd, 0, SEEK_SET);
buffer = g_malloc(size+1);
size = fread(buffer, 1, size, fd);
buffer[size] = 0;
gval = ghb_plist_parse(buffer, (gssize)size);
g_free(buffer);
fclose(fd);
return gval;
}
static void
indent_fprintf(FILE *file, gint indent, const gchar *fmt, ...)
{
va_list ap;
for (; indent; indent--)
putc('\t', file);
va_start(ap, fmt);
vfprintf(file, fmt, ap);
va_end(ap);
}
static void
gval_write(FILE *file, GhbValue *gval)
{
static gint indent = 0;
gint ii;
GhbType gtype;
if (gval == NULL) return;
gtype = ghb_value_type(gval);
if (gtype == GHB_ARRAY)
{
GhbValue *val;
gint count;
indent_fprintf(file, indent, "<array>\n");
indent++;
count = ghb_array_len(gval);
for (ii = 0; ii < count; ii++)
{
val = ghb_array_get(gval, ii);
gval_write(file, val);
}
indent--;
indent_fprintf(file, indent, "</array>\n");
}
else if (gtype == GHB_DICT)
{
const char *key;
GhbValue *val;
GhbDictIter iter;
indent_fprintf(file, indent, "<dict>\n");
indent++;
iter = ghb_dict_iter_init(gval);
while (ghb_dict_iter_next(gval, &iter, &key, &val))
{
indent_fprintf(file, indent, "<key>%s</key>\n", key);
gval_write(file, val);
}
indent--;
indent_fprintf(file, indent, "</dict>\n");
}
else if (gtype == GHB_BOOL)
{
gchar *tag;
if (ghb_value_get_bool(gval))
{
tag = "true";
}
else
{
tag = "false";
}
indent_fprintf(file, indent, "<%s />\n", tag);
}
else if (gtype == GHB_DOUBLE)
{
gdouble val = ghb_value_get_double(gval);
indent_fprintf(file, indent, "<real>%.17g</real>\n", val);
}
else if (gtype == GHB_INT)
{
gint64 val = ghb_value_get_int(gval);
indent_fprintf(file, indent, "<integer>%"PRId64"</integer>\n", val);
}
else if (gtype == GHB_STRING)
{
const gchar *str = ghb_value_get_string(gval);
gchar *esc = g_markup_escape_text(str, -1);
indent_fprintf(file, indent, "<string>%s</string>\n", esc);
g_free(esc);
}
else
{
// Try to make anything that's unrecognized into a string
g_warning("Unhandled data type %d", gtype);
}
}
void
ghb_plist_write(FILE *file, GhbValue *gval)
{
fprintf(file, "%s", preamble);
gval_write(file, gval);
fprintf(file, "%s", postfix);
}
void
ghb_plist_write_file(const gchar *filename, GhbValue *gval)
{
FILE *file;
file = g_fopen(filename, "w");
if (file == NULL)
return;
ghb_plist_write(file, gval);
fclose(file);
}
#if defined(PL_TEST)
gint
main(gint argc, gchar *argv[])
{
GhbValue *gval;
g_type_init();
file = g_fopen(argv[1], "r");
gval = ghb_plist_parse_file(file);
if (argc > 2)
ghb_plist_write_file(argv[2], gval);
else
ghb_plist_write(stdout, gval);
if (file) fclose (file);
return 0;
}
#endif
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