src/gromacs/topology/symtab.h

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  37 #ifndef GMX_TOPOLOGY_SYMTAB_H
  38 #define GMX_TOPOLOGY_SYMTAB_H
  39
  40 #include <stdio.h>
  41
  42 #ifdef __cplusplus
  43 extern "C" {
  44 #endif
  45
  46 typedef struct t_symbuf
  47 {
  48     int               bufsize;
  49     char            **buf;
  50     struct t_symbuf  *next;
  51 } t_symbuf;
  52
  53 typedef struct t_symtab
  54 {
  55     int       nr;
  56     t_symbuf *symbuf;
  57 } t_symtab;
  58
  59 /*
  60  * This module handles symbol table manipulation. All text strings
  61  * needed by an application are allocated only once. All references
  62  * to these text strings use handles returned from the put_symtab()
  63  * routine. These handles can easily be converted to address independent
  64  * values by invoking lookup_symtab(). So when writing structures to
  65  * a file which contains text strings, this value can be written in stead
  66  * of the text string or its address. This value can easily be converted
  67  * back to a text string handle by get_symtab_handle().
  68  */
  69
  70 void open_symtab(t_symtab *symtab);
  71 /* Initialises the symbol table symtab.
  72  */
  73
  74 void close_symtab(t_symtab *symtab);
  75 /* Undoes the effect of open_symtab(), after invoking this function,
  76  * no value can be added to the symbol table, only values can be
  77  * retrieved using get_symtab().
  78  */
  79
  80 void free_symtab(t_symtab *symtab);
  81 /* Frees the space allocated by the symbol table itself */
  82
  83 void done_symtab(t_symtab *symtab);
  84 /* Frees the space allocated by the symbol table, including all
  85  * entries in it */
  86
  87 char **put_symtab(t_symtab *symtab, const char *name);
  88 /* Enters a string into the symbol table symtab, if it was not
  89  * available, a reference to a copy is returned else a reference
  90  * to the earlier entered value is returned. Strings are trimmed
  91  * of spaces.
  92  */
  93
  94 int lookup_symtab(t_symtab *symtab, char **name);
  95 /* Returns a unique handle for **name, without a memory reference.
  96  * It is a failure when name cannot be found in the symbol table,
  97  * it should be entered before with put_symtab().
  98  */
  99
 100 char **get_symtab_handle(t_symtab *symtab, int name);
 101 /* Returns a text string handle for name. Name should be a value
 102  * returned from lookup_symtab(). So get_symtab_handle() and
 103  * lookup_symtab() are inverse functions.
 104  */
 105
 106 long wr_symtab(FILE *fp, t_symtab *symtab);
 107 /* Writes the symbol table symtab to the file, specified by fp.
 108  * The function returns the number of bytes written.
 109  */
 110
 111 long rd_symtab(FILE *fp, t_symtab *symtab);
 112 /* Reads the symbol table symtab from the file, specified by fp.
 113  * This will include allocating the needed space. The function
 114  * returns the number of bytes read. The symtab is in the closed
 115  * state afterwards, so no strings can be added to it.
 116  */
 117
 118 void pr_symtab(FILE *fp, int indent, const char *title, t_symtab *symtab);
 119 /* This routine prints out a (human) readable representation of
 120  * the symbol table symtab to the file fp. Ident specifies the
 121  * number of spaces the text should be indented. Title is used
 122  * to print a header text.
 123  */
 124
 125 #ifdef __cplusplus
 126 }
 127 #endif
 128
 129 #endif