初始化PHP-Xlswrite扩展

library/libxlsxwriter/include/xlsxwriter/shared_strings.h

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+/*
+ * libxlsxwriter
+ *
+ * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org. See LICENSE.txt.
+ *
+ * shared_strings - A libxlsxwriter library for creating Excel XLSX
+ *                  sst files.
+ *
+ */
+#ifndef __LXW_SST_H__
+#define __LXW_SST_H__
+
+#include <string.h>
+#include <stdint.h>
+
+#include "common.h"
+
+/* Define a tree.h RB structure for storing shared strings. */
+RB_HEAD(sst_rb_tree, sst_element);
+
+/* Define a queue.h structure for storing shared strings in insertion order. */
+STAILQ_HEAD(sst_order_list, sst_element);
+
+/* Wrapper around RB_GENERATE_STATIC from tree.h to avoid unused function
+ * warnings and to avoid portability issues with the _unused attribute. */
+#define LXW_RB_GENERATE_ELEMENT(name, type, field, cmp) \
+    RB_GENERATE_INSERT_COLOR(name, type, field, static) \
+    RB_GENERATE_INSERT(name, type, field, cmp, static)  \
+    /* Add unused struct to allow adding a semicolon */ \
+    struct lxw_rb_generate_element{int unused;}
+
+/*
+ * Elements of the SST table. They contain pointers to allow them to
+ * be stored in a RB tree and also pointers to track the insertion order
+ * in a separate list.
+ */
+struct sst_element {
+    uint32_t index;
+    char *string;
+    uint8_t is_rich_string;
+
+    STAILQ_ENTRY (sst_element) sst_order_pointers;
+    RB_ENTRY (sst_element) sst_tree_pointers;
+};
+
+/*
+ * Struct to represent a sst.
+ */
+typedef struct lxw_sst {
+    FILE *file;
+
+    uint32_t string_count;
+    uint32_t unique_count;
+
+    struct sst_order_list *order_list;
+    struct sst_rb_tree *rb_tree;
+
+} lxw_sst;
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+extern "C" {
+#endif
+/* *INDENT-ON* */
+
+lxw_sst *lxw_sst_new(void);
+void lxw_sst_free(lxw_sst *sst);
+struct sst_element *lxw_get_sst_index(lxw_sst *sst, const char *string,
+                                      uint8_t is_rich_string);
+void lxw_sst_assemble_xml_file(lxw_sst *self);
+
+/* Declarations required for unit testing. */
+#ifdef TESTING
+
+STATIC void _sst_xml_declaration(lxw_sst *self);
+
+#endif /* TESTING */
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+}
+#endif
+/* *INDENT-ON* */
+
+#endif /* __LXW_SST_H__ */