src/gromacs/topology/symtab.cpp

   1 /*
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  37 #include "gmxpre.h"
  38
  39 #include "symtab.h"
  40
  41 #include <stdio.h>
  42 #include <string.h>
  43
  44 #include <algorithm>
  45
  46 #include "gromacs/utility/basedefinitions.h"
  47 #include "gromacs/utility/cstringutil.h"
  48 #include "gromacs/utility/fatalerror.h"
  49 #include "gromacs/utility/smalloc.h"
  50 #include "gromacs/utility/txtdump.h"
  51
  52 #define BUFSIZE         1024
  53 #define TABLESIZE       5
  54
  55 static char *trim_string(const char *s, char *out, int maxlen)
  56 /*
  57  * Returns a pointer to a static area which contains a copy
  58  * of s without leading or trailing spaces. Strings are
  59  * truncated to BUFSIZE positions.
  60  *
  61  * TODO This partially duplicates code in trim(), but perhaps
  62  * replacing symtab with a std::map is a better fix.
  63  */
  64 {
  65     int len, i;
  66
  67     if (strlen(s) > (size_t)(maxlen-1))
  68     {
  69         gmx_fatal(FARGS, "String '%s' (%d) is longer than buffer (%d).\n",
  70                   s, strlen(s), maxlen-1);
  71     }
  72
  73     for (; (*s) == ' '; s++)
  74     {
  75         ;
  76     }
  77     for (len = strlen(s); (len > 0); len--)
  78     {
  79         if (s[len-1] != ' ')
  80         {
  81             break;
  82         }
  83     }
  84     if (len >= BUFSIZE)
  85     {
  86         len = BUFSIZE-1;
  87     }
  88     for (i = 0; i < len; i++)
  89     {
  90         out[i] = *(s++);
  91     }
  92     out[i] = 0;
  93     return out;
  94 }
  95
  96 int lookup_symtab(t_symtab *symtab, char **name)
  97 {
  98     int       base;
  99     t_symbuf *symbuf;
 100
 101     base   = 0;
 102     symbuf = symtab->symbuf;
 103     while (symbuf != nullptr)
 104     {
 105         const int index = name-symbuf->buf;
 106         if ( ( index >= 0 ) && ( index < symbuf->bufsize ) )
 107         {
 108             return index+base;
 109         }
 110         else
 111         {
 112             base  += symbuf->bufsize;
 113             symbuf = symbuf->next;
 114         }
 115     }
 116     gmx_fatal(FARGS, "symtab lookup \"%s\" not found", *name);
 117     return -1;
 118 }
 119
 120 char **get_symtab_handle(t_symtab *symtab, int name)
 121 {
 122     t_symbuf *symbuf;
 123
 124     symbuf = symtab->symbuf;
 125     while (symbuf != nullptr)
 126     {
 127         if (name < symbuf->bufsize)
 128         {
 129             return &(symbuf->buf[name]);
 130         }
 131         else
 132         {
 133             name  -= symbuf->bufsize;
 134             symbuf = symbuf->next;
 135         }
 136     }
 137     gmx_fatal(FARGS, "symtab get_symtab_handle %d not found", name);
 138     return nullptr;
 139 }
 140
 141 static t_symbuf *new_symbuf(void)
 142 {
 143     t_symbuf *symbuf;
 144
 145     snew(symbuf, 1);
 146     symbuf->bufsize = TABLESIZE;
 147     snew(symbuf->buf, symbuf->bufsize);
 148     symbuf->next = nullptr;
 149
 150     return symbuf;
 151 }
 152
 153 static char **enter_buf(t_symtab *symtab, char *name)
 154 {
 155     int          i;
 156     t_symbuf    *symbuf;
 157     gmx_bool     bCont;
 158
 159     if (symtab->symbuf == nullptr)
 160     {
 161         symtab->symbuf = new_symbuf();
 162     }
 163
 164     symbuf = symtab->symbuf;
 165     do
 166     {
 167         for (i = 0; (i < symbuf->bufsize); i++)
 168         {
 169             if (symbuf->buf[i] == nullptr)
 170             {
 171                 symtab->nr++;
 172                 symbuf->buf[i] = gmx_strdup(name);
 173                 return &(symbuf->buf[i]);
 174             }
 175             else if (strcmp(symbuf->buf[i], name) == 0)
 176             {
 177                 return &(symbuf->buf[i]);
 178             }
 179         }
 180         if (symbuf->next != nullptr)
 181         {
 182             symbuf = symbuf->next;
 183             bCont  = TRUE;
 184         }
 185         else
 186         {
 187             bCont = FALSE;
 188         }
 189     }
 190     while (bCont);
 191
 192     symbuf->next = new_symbuf();
 193     symbuf       = symbuf->next;
 194
 195     symtab->nr++;
 196     symbuf->buf[0] = gmx_strdup(name);
 197     return &(symbuf->buf[0]);
 198 }
 199
 200 char **put_symtab(t_symtab *symtab, const char *name)
 201 {
 202     char buf[1024];
 203
 204     return enter_buf(symtab, trim_string(name, buf, 1023));
 205 }
 206
 207 void open_symtab(t_symtab *symtab)
 208 {
 209     symtab->nr     = 0;
 210     symtab->symbuf = nullptr;
 211 }
 212
 213 void close_symtab(t_symtab gmx_unused *symtab)
 214 {
 215 }
 216
 217 void done_symtab(t_symtab *symtab)
 218 {
 219     int       i;
 220     t_symbuf *symbuf, *freeptr;
 221
 222     close_symtab(symtab);
 223     symbuf = symtab->symbuf;
 224     while (symbuf != nullptr)
 225     {
 226         for (i = 0; (i < symbuf->bufsize) && (i < symtab->nr); i++)
 227         {
 228             sfree(symbuf->buf[i]);
 229         }
 230         symtab->nr -= i;
 231         sfree(symbuf->buf);
 232         freeptr = symbuf;
 233         symbuf  = symbuf->next;
 234         sfree(freeptr);
 235     }
 236     symtab->symbuf = nullptr;
 237     if (symtab->nr != 0)
 238     {
 239         gmx_incons("Freeing symbol table (symtab) structure");
 240     }
 241 }
 242
 243 void free_symtab(t_symtab *symtab)
 244 {
 245     t_symbuf *symbuf, *freeptr;
 246
 247     close_symtab(symtab);
 248     symbuf = symtab->symbuf;
 249     while (symbuf != nullptr)
 250     {
 251         symtab->nr -= std::min(symbuf->bufsize, symtab->nr);
 252         freeptr     = symbuf;
 253         symbuf      = symbuf->next;
 254         sfree(freeptr);
 255     }
 256     symtab->symbuf = nullptr;
 257     if (symtab->nr != 0)
 258     {
 259         gmx_incons("Freeing symbol table (symtab) structure");
 260     }
 261 }
 262
 263 void pr_symtab(FILE *fp, int indent, const char *title, t_symtab *symtab)
 264 {
 265     int       i, j, nr;
 266     t_symbuf *symbuf;
 267
 268     if (available(fp, symtab, indent, title))
 269     {
 270         indent = pr_title_n(fp, indent, title, symtab->nr);
 271         i      = 0;
 272         nr     = symtab->nr;
 273         symbuf = symtab->symbuf;
 274         while (symbuf != nullptr)
 275         {
 276             for (j = 0; (j < symbuf->bufsize) && (j < nr); j++)
 277             {
 278                 pr_indent(fp, indent);
 279                 (void) fprintf(fp, "%s[%d]=\"%s\"\n", title, i++, symbuf->buf[j]);
 280             }
 281             nr    -= j;
 282             symbuf = symbuf->next;
 283         }
 284         if (nr != 0)
 285         {
 286             gmx_incons("Printing symbol table (symtab) structure");
 287         }
 288     }
 289 }