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-rw-r--r--src/oplist.c861
1 files changed, 861 insertions, 0 deletions
diff --git a/src/oplist.c b/src/oplist.c
new file mode 100644
index 0000000..fa6977a
--- /dev/null
+++ b/src/oplist.c
@@ -0,0 +1,861 @@
+/*
+ * oplist.c
+ * OpenStep plist implementation
+ *
+ * Copyright (c) 2021-2022 Nikias Bassen, All Rights Reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+#include <inttypes.h>
+#include <ctype.h>
+#include <math.h>
+#include <limits.h>
+
+#include <node.h>
+#include <node_list.h>
+
+#include "plist.h"
+#include "strbuf.h"
+
+#ifdef DEBUG
+static int plist_ostep_debug = 0;
+#define PLIST_OSTEP_ERR(...) if (plist_ostep_debug) { fprintf(stderr, "libplist[ostepparser] ERROR: " __VA_ARGS__); }
+#define PLIST_OSTEP_WRITE_ERR(...) if (plist_ostep_debug) { fprintf(stderr, "libplist[ostepwriter] ERROR: " __VA_ARGS__); }
+#else
+#define PLIST_OSTEP_ERR(...)
+#define PLIST_OSTEP_WRITE_ERR(...)
+#endif
+
+void plist_ostep_init(void)
+{
+ /* init OpenStep stuff */
+#ifdef DEBUG
+ char *env_debug = getenv("PLIST_OSTEP_DEBUG");
+ if (env_debug && !strcmp(env_debug, "1")) {
+ plist_ostep_debug = 1;
+ }
+#endif
+}
+
+void plist_ostep_deinit(void)
+{
+ /* deinit OpenStep plist stuff */
+}
+
+#ifndef HAVE_STRNDUP
+static char* strndup(const char* str, size_t len)
+{
+ char *newstr = (char *)malloc(len+1);
+ if (newstr) {
+ strncpy(newstr, str, len);
+ newstr[len]= '\0';
+ }
+ return newstr;
+}
+#endif
+
+static size_t dtostr(char *buf, size_t bufsize, double realval)
+{
+ size_t len = 0;
+ if (isnan(realval)) {
+ len = snprintf(buf, bufsize, "nan");
+ } else if (isinf(realval)) {
+ len = snprintf(buf, bufsize, "%cinfinity", (realval > 0.0) ? '+' : '-');
+ } else if (realval == 0.0f) {
+ len = snprintf(buf, bufsize, "0.0");
+ } else {
+ size_t i = 0;
+ len = snprintf(buf, bufsize, "%.*g", 17, realval);
+ for (i = 0; buf && i < len; i++) {
+ if (buf[i] == ',') {
+ buf[i] = '.';
+ break;
+ } else if (buf[i] == '.') {
+ break;
+ }
+ }
+ }
+ return len;
+}
+
+static const char allowed_unquoted_chars[256] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+ 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1,
+ 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+
+static int str_needs_quotes(const char* str, size_t len)
+{
+ size_t i;
+ for (i = 0; i < len; i++) {
+ if (!allowed_unquoted_chars[(unsigned char)str[i]]) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int node_to_openstep(node_t* node, bytearray_t **outbuf, uint32_t depth, int prettify)
+{
+ plist_data_t node_data = NULL;
+
+ char *val = NULL;
+ size_t val_len = 0;
+
+ uint32_t i = 0;
+
+ if (!node)
+ return PLIST_ERR_INVALID_ARG;
+
+ node_data = plist_get_data(node);
+
+ switch (node_data->type)
+ {
+ case PLIST_UINT:
+ val = (char*)malloc(64);
+ if (node_data->length == 16) {
+ val_len = snprintf(val, 64, "%"PRIu64, node_data->intval);
+ } else {
+ val_len = snprintf(val, 64, "%"PRIi64, node_data->intval);
+ }
+ str_buf_append(*outbuf, val, val_len);
+ free(val);
+ break;
+
+ case PLIST_REAL:
+ val = (char*)malloc(64);
+ val_len = dtostr(val, 64, node_data->realval);
+ str_buf_append(*outbuf, val, val_len);
+ free(val);
+ break;
+
+ case PLIST_STRING:
+ case PLIST_KEY: {
+ const char *charmap[32] = {
+ "\\U0000", "\\U0001", "\\U0002", "\\U0003", "\\U0004", "\\U0005", "\\U0006", "\\U0007",
+ "\\b", "\\t", "\\n", "\\U000b", "\\f", "\\r", "\\U000e", "\\U000f",
+ "\\U0010", "\\U0011", "\\U0012", "\\U0013", "\\U0014", "\\U0015", "\\U0016", "\\U0017",
+ "\\U0018", "\\U0019", "\\U001a", "\\U001b", "\\U001c", "\\U001d", "\\U001e", "\\U001f",
+ };
+ size_t j = 0;
+ size_t len = 0;
+ off_t start = 0;
+ off_t cur = 0;
+ int needs_quotes;
+
+ len = node_data->length;
+
+ needs_quotes = str_needs_quotes(node_data->strval, len);
+
+ if (needs_quotes) {
+ str_buf_append(*outbuf, "\"", 1);
+ }
+
+ for (j = 0; j < len; j++) {
+ unsigned char ch = (unsigned char)node_data->strval[j];
+ if (ch < 0x20) {
+ str_buf_append(*outbuf, node_data->strval + start, cur - start);
+ str_buf_append(*outbuf, charmap[ch], (charmap[ch][1] == 'u') ? 6 : 2);
+ start = cur+1;
+ } else if (ch == '"') {
+ str_buf_append(*outbuf, node_data->strval + start, cur - start);
+ str_buf_append(*outbuf, "\\\"", 2);
+ start = cur+1;
+ }
+ cur++;
+ }
+ str_buf_append(*outbuf, node_data->strval + start, cur - start);
+
+ if (needs_quotes) {
+ str_buf_append(*outbuf, "\"", 1);
+ }
+
+ } break;
+
+ case PLIST_ARRAY: {
+ str_buf_append(*outbuf, "(", 1);
+ node_t *ch;
+ uint32_t cnt = 0;
+ for (ch = node_first_child(node); ch; ch = node_next_sibling(ch)) {
+ if (cnt > 0) {
+ str_buf_append(*outbuf, ",", 1);
+ }
+ if (prettify) {
+ str_buf_append(*outbuf, "\n", 1);
+ for (i = 0; i <= depth; i++) {
+ str_buf_append(*outbuf, " ", 2);
+ }
+ }
+ int res = node_to_openstep(ch, outbuf, depth+1, prettify);
+ if (res < 0) {
+ return res;
+ }
+ cnt++;
+ }
+ if (cnt > 0 && prettify) {
+ str_buf_append(*outbuf, "\n", 1);
+ for (i = 0; i < depth; i++) {
+ str_buf_append(*outbuf, " ", 2);
+ }
+ }
+ str_buf_append(*outbuf, ")", 1);
+ } break;
+ case PLIST_DICT: {
+ str_buf_append(*outbuf, "{", 1);
+ node_t *ch;
+ uint32_t cnt = 0;
+ for (ch = node_first_child(node); ch; ch = node_next_sibling(ch)) {
+ if (cnt > 0 && cnt % 2 == 0) {
+ str_buf_append(*outbuf, ";", 1);
+ }
+ if (cnt % 2 == 0 && prettify) {
+ str_buf_append(*outbuf, "\n", 1);
+ for (i = 0; i <= depth; i++) {
+ str_buf_append(*outbuf, " ", 2);
+ }
+ }
+ int res = node_to_openstep(ch, outbuf, depth+1, prettify);
+ if (res < 0) {
+ return res;
+ }
+ if (cnt % 2 == 0) {
+ if (prettify) {
+ str_buf_append(*outbuf, " = ", 3);
+ } else {
+ str_buf_append(*outbuf, "=", 1);
+ }
+ }
+ cnt++;
+ }
+ if (cnt > 0) {
+ str_buf_append(*outbuf, ";", 1);
+ }
+ if (cnt > 0 && prettify) {
+ str_buf_append(*outbuf, "\n", 1);
+ for (i = 0; i < depth; i++) {
+ str_buf_append(*outbuf, " ", 2);
+ }
+ }
+ str_buf_append(*outbuf, "}", 1);
+ } break;
+ case PLIST_DATA: {
+ size_t j = 0;
+ size_t len = 0;
+ str_buf_append(*outbuf, "<", 1);
+ len = node_data->length;
+ for (j = 0; j < len; j++) {
+ char charb[4];
+ if (prettify && j > 0 && (j % 4 == 0))
+ str_buf_append(*outbuf, " ", 1);
+ sprintf(charb, "%02x", (unsigned char)node_data->buff[j]);
+ str_buf_append(*outbuf, charb, 2);
+ }
+ str_buf_append(*outbuf, ">", 1);
+ } break;
+ case PLIST_BOOLEAN:
+ PLIST_OSTEP_WRITE_ERR("PLIST_BOOLEAN type is not valid for OpenStep format\n");
+ return PLIST_ERR_FORMAT;
+ case PLIST_NULL:
+ PLIST_OSTEP_WRITE_ERR("PLIST_NULL type is not valid for OpenStep format\n");
+ return PLIST_ERR_FORMAT;
+ case PLIST_DATE:
+ // NOT VALID FOR OPENSTEP
+ PLIST_OSTEP_WRITE_ERR("PLIST_DATE type is not valid for OpenStep format\n");
+ return PLIST_ERR_FORMAT;
+ case PLIST_UID:
+ // NOT VALID FOR OPENSTEP
+ PLIST_OSTEP_WRITE_ERR("PLIST_UID type is not valid for OpenStep format\n");
+ return PLIST_ERR_FORMAT;
+ default:
+ return PLIST_ERR_UNKNOWN;
+ }
+
+ return PLIST_ERR_SUCCESS;
+}
+
+#define PO10i_LIMIT (INT64_MAX/10)
+
+/* based on https://stackoverflow.com/a/4143288 */
+static int num_digits_i(int64_t i)
+{
+ int n;
+ int64_t po10;
+ n=1;
+ if (i < 0) {
+ i = (i == INT64_MIN) ? INT64_MAX : -i;
+ n++;
+ }
+ po10=10;
+ while (i>=po10) {
+ n++;
+ if (po10 > PO10i_LIMIT) break;
+ po10*=10;
+ }
+ return n;
+}
+
+#define PO10u_LIMIT (UINT64_MAX/10)
+
+/* based on https://stackoverflow.com/a/4143288 */
+static int num_digits_u(uint64_t i)
+{
+ int n;
+ uint64_t po10;
+ n=1;
+ po10=10;
+ while (i>=po10) {
+ n++;
+ if (po10 > PO10u_LIMIT) break;
+ po10*=10;
+ }
+ return n;
+}
+
+static int node_estimate_size(node_t *node, uint64_t *size, uint32_t depth, int prettify)
+{
+ plist_data_t data;
+ if (!node) {
+ return PLIST_ERR_INVALID_ARG;
+ }
+ data = plist_get_data(node);
+ if (node->children) {
+ node_t *ch;
+ unsigned int n_children = node_n_children(node);
+ for (ch = node_first_child(node); ch; ch = node_next_sibling(ch)) {
+ int res = node_estimate_size(ch, size, depth + 1, prettify);
+ if (res < 0) {
+ return res;
+ }
+ }
+ switch (data->type) {
+ case PLIST_DICT:
+ *size += 2; // '{' and '}'
+ *size += n_children; // number of '=' and ';'
+ if (prettify) {
+ *size += n_children*2; // number of '\n' and extra spaces
+ *size += (uint64_t)n_children * (depth+1); // indent for every 2nd child
+ *size += 1; // additional '\n'
+ }
+ break;
+ case PLIST_ARRAY:
+ *size += 2; // '(' and ')'
+ *size += n_children-1; // number of ','
+ if (prettify) {
+ *size += n_children; // number of '\n'
+ *size += (uint64_t)n_children * ((depth+1)<<1); // indent for every child
+ *size += 1; // additional '\n'
+ }
+ break;
+ default:
+ break;
+ }
+ if (prettify)
+ *size += (depth << 1); // indent for {} and ()
+ } else {
+ switch (data->type) {
+ case PLIST_STRING:
+ case PLIST_KEY:
+ *size += data->length;
+ *size += 2;
+ break;
+ case PLIST_UINT:
+ if (data->length == 16) {
+ *size += num_digits_u(data->intval);
+ } else {
+ *size += num_digits_i((int64_t)data->intval);
+ }
+ break;
+ case PLIST_REAL:
+ *size += dtostr(NULL, 0, data->realval);
+ break;
+ case PLIST_DICT:
+ case PLIST_ARRAY:
+ *size += 2;
+ break;
+ case PLIST_DATA:
+ *size += 2; // < and >
+ *size += data->length*2;
+ if (prettify)
+ *size += data->length/4;
+ break;
+ case PLIST_BOOLEAN:
+ // NOT VALID FOR OPENSTEP
+ PLIST_OSTEP_WRITE_ERR("PLIST_BOOLEAN type is not valid for OpenStep format\n");
+ return PLIST_ERR_FORMAT;
+ case PLIST_DATE:
+ // NOT VALID FOR OPENSTEP
+ PLIST_OSTEP_WRITE_ERR("PLIST_DATE type is not valid for OpenStep format\n");
+ return PLIST_ERR_FORMAT;
+ case PLIST_UID:
+ // NOT VALID FOR OPENSTEP
+ PLIST_OSTEP_WRITE_ERR("PLIST_UID type is not valid for OpenStep format\n");
+ return PLIST_ERR_FORMAT;
+ default:
+ PLIST_OSTEP_WRITE_ERR("invalid node type encountered\n");
+ return PLIST_ERR_UNKNOWN;
+ }
+ }
+ return PLIST_ERR_SUCCESS;
+}
+
+PLIST_API int plist_to_openstep(plist_t plist, char **openstep, uint32_t* length, int prettify)
+{
+ uint64_t size = 0;
+ int res;
+
+ if (!plist || !openstep || !length) {
+ return PLIST_ERR_INVALID_ARG;
+ }
+
+ res = node_estimate_size(plist, &size, 0, prettify);
+ if (res < 0) {
+ return res;
+ }
+
+ strbuf_t *outbuf = str_buf_new(size);
+ if (!outbuf) {
+ PLIST_OSTEP_WRITE_ERR("Could not allocate output buffer");
+ return PLIST_ERR_NO_MEM;
+ }
+
+ res = node_to_openstep(plist, &outbuf, 0, prettify);
+ if (res < 0) {
+ str_buf_free(outbuf);
+ *openstep = NULL;
+ *length = 0;
+ return res;
+ }
+ if (prettify) {
+ str_buf_append(outbuf, "\n", 1);
+ }
+
+ str_buf_append(outbuf, "\0", 1);
+
+ *openstep = outbuf->data;
+ *length = outbuf->len - 1;
+
+ outbuf->data = NULL;
+ str_buf_free(outbuf);
+
+ return PLIST_ERR_SUCCESS;
+}
+
+struct _parse_ctx {
+ const char *start;
+ const char *pos;
+ const char *end;
+ int err;
+};
+typedef struct _parse_ctx* parse_ctx;
+
+static void parse_skip_ws(parse_ctx ctx)
+{
+ while (ctx->pos < ctx->end) {
+ // skip comments
+ if (*ctx->pos == '/' && (ctx->end - ctx->pos > 1)) {
+ if (*(ctx->pos+1) == '/') {
+ ctx->pos++;
+ while (ctx->pos < ctx->end) {
+ if ((*ctx->pos == '\n') || (*ctx->pos == '\r')) {
+ break;
+ }
+ ctx->pos++;
+ }
+ } else if (*(ctx->pos+1) == '*') {
+ ctx->pos++;
+ while (ctx->pos < ctx->end) {
+ if (*ctx->pos == '*' && (ctx->end - ctx->pos > 1)) {
+ if (*(ctx->pos+1) == '/') {
+ ctx->pos+=2;
+ break;
+ }
+ }
+ ctx->pos++;
+ }
+ }
+ }
+ // break on any char that's not white space
+ if (!(((*(ctx->pos) == ' ') || (*(ctx->pos) == '\t') || (*(ctx->pos) == '\r') || (*(ctx->pos) == '\n')))) {
+ break;
+ }
+ ctx->pos++;
+ }
+}
+
+#define HEX_DIGIT(x) ((x <= '9') ? (x - '0') : ((x <= 'F') ? (x - 'A' + 10) : (x - 'a' + 10)))
+
+static int node_from_openstep(parse_ctx ctx, plist_t *plist);
+
+static void parse_dict_data(parse_ctx ctx, plist_t dict)
+{
+ plist_t key = NULL;
+ plist_t val = NULL;
+ while (ctx->pos < ctx->end && !ctx->err) {
+ parse_skip_ws(ctx);
+ if (*ctx->pos == '}' || ctx->pos >= ctx->end) {
+ break;
+ }
+ key = NULL;
+ ctx->err = node_from_openstep(ctx, &key);
+ if (ctx->err != 0) {
+ break;
+ }
+ if (!PLIST_IS_STRING(key)) {
+ PLIST_OSTEP_ERR("Invalid type for dictionary key at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ break;
+ }
+ parse_skip_ws(ctx);
+ if (*ctx->pos != '=') {
+ PLIST_OSTEP_ERR("Missing '=' while parsing dictionary item at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ break;
+ }
+ ctx->pos++;
+ if (ctx->pos >= ctx->end) {
+ PLIST_OSTEP_ERR("EOF while parsing dictionary item at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ break;
+ }
+ val = NULL;
+ ctx->err = node_from_openstep(ctx, &val);
+ if (ctx->err != 0) {
+ plist_free(key);
+ break;
+ }
+ if (!val) {
+ plist_free(key);
+ PLIST_OSTEP_ERR("Missing value for dictionary item at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ break;
+ }
+ parse_skip_ws(ctx);
+ if (*ctx->pos != ';') {
+ plist_free(val);
+ plist_free(key);
+ PLIST_OSTEP_ERR("Missing terminating ';' while parsing dictionary item at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ break;
+ }
+
+ plist_dict_set_item(dict, plist_get_string_ptr(key, NULL), val);
+ plist_free(key);
+ val = NULL;
+
+ ctx->pos++;
+ }
+}
+
+static int node_from_openstep(parse_ctx ctx, plist_t *plist)
+{
+ plist_t subnode = NULL;
+ const char *p = NULL;
+ while (ctx->pos < ctx->end && !ctx->err) {
+ parse_skip_ws(ctx);
+ if (ctx->pos >= ctx->end) {
+ break;
+ }
+ plist_data_t data = plist_new_plist_data();
+ if (*ctx->pos == '{') {
+ data->type = PLIST_DICT;
+ subnode = plist_new_node(data);
+ ctx->pos++;
+ parse_dict_data(ctx, subnode);
+ if (ctx->err) {
+ goto err_out;
+ }
+ if (*ctx->pos != '}') {
+ PLIST_OSTEP_ERR("Missing terminating '}' at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ goto err_out;
+ }
+ ctx->pos++;
+ *plist = subnode;
+ parse_skip_ws(ctx);
+ break;
+ } else if (*ctx->pos == '(') {
+ data->type = PLIST_ARRAY;
+ subnode = plist_new_node(data);
+ ctx->pos++;
+ plist_t tmp = NULL;
+ while (ctx->pos < ctx->end && !ctx->err) {
+ parse_skip_ws(ctx);
+ if (*ctx->pos == ')') {
+ break;
+ }
+ ctx->err = node_from_openstep(ctx, &tmp);
+ if (ctx->err != 0) {
+ break;
+ }
+ if (!tmp) {
+ ctx->err++;
+ break;
+ }
+ plist_array_append_item(subnode, tmp);
+ tmp = NULL;
+ parse_skip_ws(ctx);
+ if (*ctx->pos != ',') {
+ break;
+ }
+ ctx->pos++;
+ }
+ if (ctx->err) {
+ goto err_out;
+ }
+ if (*ctx->pos != ')') {
+ PLIST_OSTEP_ERR("Missing terminating ')' at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ goto err_out;
+ }
+ ctx->pos++;
+ *plist = subnode;
+ parse_skip_ws(ctx);
+ break;
+ } else if (*ctx->pos == '<') {
+ data->type = PLIST_DATA;
+ ctx->pos++;
+ bytearray_t *bytes = byte_array_new(256);
+ while (ctx->pos < ctx->end && !ctx->err) {
+ parse_skip_ws(ctx);
+ if (*ctx->pos == '>') {
+ break;
+ }
+ if (!isxdigit(*ctx->pos)) {
+ PLIST_OSTEP_ERR("Invalid byte group in data at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ break;
+ }
+ uint8_t b = HEX_DIGIT(*ctx->pos);
+ ctx->pos++;
+ if (ctx->pos >= ctx->end) {
+ PLIST_OSTEP_ERR("Unexpected end of data at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ break;
+ }
+ if (!isxdigit(*ctx->pos)) {
+ PLIST_OSTEP_ERR("Invalid byte group in data at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ break;
+ }
+ b = (b << 4) + HEX_DIGIT(*ctx->pos);
+ byte_array_append(bytes, &b, 1);
+ ctx->pos++;
+ }
+ if (ctx->err) {
+ goto err_out;
+ }
+ if (*ctx->pos != '>') {
+ PLIST_OSTEP_ERR("Missing terminating '>' at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ goto err_out;
+ }
+ ctx->pos++;
+ data->buff = bytes->data;
+ data->length = bytes->len;
+ bytes->data = NULL;
+ byte_array_free(bytes);
+ *plist = plist_new_node(data);
+ parse_skip_ws(ctx);
+ break;
+ } else if (*ctx->pos == '"' || *ctx->pos == '\'') {
+ char c = *ctx->pos;
+ ctx->pos++;
+ p = ctx->pos;
+ int num_escapes = 0;
+ while (ctx->pos < ctx->end) {
+ if (*ctx->pos == '\\') {
+ num_escapes++;
+ }
+ if ((*ctx->pos == c) && (*(ctx->pos-1) != '\\')) {
+ break;
+ }
+ ctx->pos++;
+ }
+ if (*ctx->pos != c) {
+ PLIST_OSTEP_ERR("Missing closing quote (%c) at offset %ld\n", c, ctx->pos - ctx->start);
+ ctx->err++;
+ goto err_out;
+ }
+ size_t slen = ctx->pos - p;
+ ctx->pos++; // skip the closing quote
+ char* strbuf = malloc(slen+1);
+ if (num_escapes > 0) {
+ size_t i = 0;
+ size_t o = 0;
+ while (i < slen) {
+ if (p[i] == '\\') {
+ /* handle escape sequence */
+ i++;
+ switch (p[i]) {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7': {
+ // max 3 digits octal
+ unsigned char chr = 0;
+ int maxd = 3;
+ while ((i < slen) && (p[i] >= '0' && p[i] <= '7') && --maxd) {
+ chr = (chr << 3) + p[i] - '0';
+ i++;
+ }
+ strbuf[o++] = (char)chr;
+ } break;
+ case 'U': {
+ i++;
+ // max 4 digits hex
+ uint16_t wchr = 0;
+ int maxd = 4;
+ while ((i < slen) && isxdigit(p[i]) && maxd--) {
+ wchr = (wchr << 4) + ((p[i] <= '9') ? (p[i] - '0') : ((p[i] <= 'F') ? (p[i] - 'A' + 10) : (p[i] - 'a' + 10)));
+ i++;
+ }
+ if (wchr >= 0x800) {
+ strbuf[o++] = (char)(0xE0 + ((wchr >> 12) & 0xF));
+ strbuf[o++] = (char)(0x80 + ((wchr >> 6) & 0x3F));
+ strbuf[o++] = (char)(0x80 + (wchr & 0x3F));
+ } else if (wchr >= 0x80) {
+ strbuf[o++] = (char)(0xC0 + ((wchr >> 6) & 0x1F));
+ strbuf[o++] = (char)(0x80 + (wchr & 0x3F));
+ } else {
+ strbuf[o++] = (char)(wchr & 0x7F);
+ }
+ } break;
+ case 'a': strbuf[o++] = '\a'; i++; break;
+ case 'b': strbuf[o++] = '\b'; i++; break;
+ case 'f': strbuf[o++] = '\f'; i++; break;
+ case 'n': strbuf[o++] = '\n'; i++; break;
+ case 'r': strbuf[o++] = '\r'; i++; break;
+ case 't': strbuf[o++] = '\t'; i++; break;
+ case 'v': strbuf[o++] = '\v'; i++; break;
+ case '"': strbuf[o++] = '"'; i++; break;
+ case '\'': strbuf[o++] = '\''; i++; break;
+ default:
+ break;
+ }
+ } else {
+ strbuf[o++] = p[i++];
+ }
+ }
+ strbuf[o] = '\0';
+ slen = o;
+ } else {
+ strncpy(strbuf, p, slen);
+ strbuf[slen] = '\0';
+ }
+ data->type = PLIST_STRING;
+ data->strval = strbuf;
+ data->length = slen;
+ *plist = plist_new_node(data);
+ parse_skip_ws(ctx);
+ break;
+ } else {
+ // unquoted string
+ size_t slen = 0;
+ parse_skip_ws(ctx);
+ p = ctx->pos;
+ while (ctx->pos < ctx->end) {
+ if (!allowed_unquoted_chars[(uint8_t)*ctx->pos]) {
+ break;
+ }
+ ctx->pos++;
+ }
+ slen = ctx->pos-p;
+ if (slen > 0) {
+ data->type = PLIST_STRING;
+ data->strval = strndup(p, slen);
+ data->length = slen;
+ *plist = plist_new_node(data);
+ parse_skip_ws(ctx);
+ break;
+ } else {
+ PLIST_OSTEP_ERR("Unexpected character when parsing unquoted string at offset %ld\n", ctx->pos - ctx->start);
+ ctx->err++;
+ break;
+ }
+ }
+ ctx->pos++;
+ }
+
+err_out:
+ if (ctx->err) {
+ plist_free(*plist);
+ *plist = NULL;
+ return PLIST_ERR_PARSE;
+ }
+ return PLIST_ERR_SUCCESS;
+}
+
+PLIST_API int plist_from_openstep(const char *plist_ostep, uint32_t length, plist_t * plist)
+{
+ if (!plist) {
+ return PLIST_ERR_INVALID_ARG;
+ }
+ *plist = NULL;
+ if (!plist_ostep || (length == 0)) {
+ return PLIST_ERR_INVALID_ARG;
+ }
+
+ struct _parse_ctx ctx = { plist_ostep, plist_ostep, plist_ostep + length, 0 };
+
+ int err = node_from_openstep(&ctx, plist);
+ if (err == 0) {
+ if (!*plist) {
+ /* whitespace only file is considered an empty dictionary */
+ *plist = plist_new_dict();
+ } else if (ctx.pos < ctx.end && *ctx.pos == '=') {
+ /* attempt to parse this as 'strings' data */
+ plist_free(*plist);
+ plist_t pl = plist_new_dict();
+ ctx.pos = plist_ostep;
+ parse_dict_data(&ctx, pl);
+ if (ctx.err > 0) {
+ plist_free(pl);
+ PLIST_OSTEP_ERR("Failed to parse strings data\n");
+ err = PLIST_ERR_PARSE;
+ } else {
+ *plist = pl;
+ }
+ }
+ }
+
+ return err;
+}
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