varinfo_low.c

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/*
 Copyright (C) 2002 M. Marques, A. Castro, A. Rubio, G. Bertsch
 
 This program is free software; you can 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, or (at your option)
 any later version.
 
 This program 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 this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 02110-1301, USA.
 
*/
 
#include <config.h>
 
#define _GNU_SOURCE
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
typedef struct opt_type {
  char *name;
  char *value;
  char *desc;
  struct opt_type *next;
} opt_type;
 
typedef struct var_type {
  char *name;
  char *type;
  char *default_str; /* default is a reserved keyword */
  char *section;
  char *desc;
  opt_type *opt;
  struct var_type *next;
} var_type;
 
static var_type *vars = NULL;
 
/* --------------------------------------------------------- */
char *get_token(char *s, char **dest) {
  char *s1;
  size_t len;
  /* get rid of initial whitespace */
  for (; *s != '\0' && isspace(*s); s++)
    ;
  if (!isalnum(*s) && *s != '-') {
    *dest = NULL;
    return s;
  }
 
  for (s1 = s; isalnum(*s1) || *s1 == '_' || *s1 == '-' || *s1 == '('; s1++)
    ;
  len = s1 - s;
 
  *dest = (char *)strndup(s, len);
 
  return s1;
}
 
/* --------------------------------------------------------- */
void get_text(FILE *in, char **dest) {
  char c, line[256];
  int b;
 
  for (;;) {
    /* check if the next line starts by a space */
    if ((b = getc(in)) == EOF)
      return;
    c = (char)b;
    ungetc(c, in);
 
    if (!isspace(c))
      return;
 
    fgets(line, 256, in);
    if (c == '\n') {
      line[0] = ' ';
      line[1] = '\n';
      line[2] = '\0';
    }
 
    if (!*dest)
      *dest = strdup(line + 1);
    else {
      *dest = realloc(*dest, strlen(*dest) + strlen(line + 1) + 1);
      strcat(*dest, line + 1);
    }
  }
}
 
/* --------------------------------------------------------- */
void varinfo_init(const char* fname_c) {
  char line[256];
  FILE *in;
  var_type *lvar = NULL;
  opt_type *lopt;
 
  in = fopen(fname_c, "r");
  if (!in) {
    return;
  }
 
  while (fgets(line, 256, in)) {
 
    if (strncasecmp("Variable", line, 8) == 0) {
      char *s;
 
      get_token(line + 9, &s);
      if (s) { /* found a token */
        if (!lvar) {
          lvar = (var_type *)malloc(sizeof(var_type));
          vars = lvar;
        } else {
          lvar->next = (var_type *)malloc(sizeof(var_type));
          lvar = lvar->next;
        }
        lvar->name = s;
        lvar->desc = NULL;
        lvar->type = NULL;
        lvar->default_str = NULL;
        lvar->section = NULL;
        lvar->opt = NULL;
        lvar->next = NULL;
 
        lopt = NULL;
      }
      continue;
    }
 
    /* if no variable was found continue */
    if (!lvar)
      continue;
 
    if (strncasecmp("Type", line, 4) == 0)
      get_token(line + 5, &(lvar->type));
 
    if (strncasecmp("Default", line, 7) == 0)
      get_token(line + 8, &(lvar->default_str));
 
    if (strncasecmp("Section", line, 7) == 0) {
      char *s = line + 7;
      for (; *s != '\0' && isspace(*s); s++)
        ;
      lvar->section = strdup(s);
    }
 
    if (strncasecmp("Description", line, 11) == 0) {
      if (lvar->desc) { /* if repeated delete old description */
        free(lvar->desc);
        lvar->desc = NULL;
      }
      get_text(in, &(lvar->desc));
    }
 
    if (strncasecmp("Option", line, 6) == 0) {
      char *name, *value, *s;
      s = get_token(line + 6, &name);
      if (name)
        get_token(s, &value);
 
      if (name) { /* found an option */
        if (!lopt) {
          lopt = (opt_type *)malloc(sizeof(opt_type));
          lvar->opt = lopt;
        } else {
          lopt->next = (opt_type *)malloc(sizeof(var_type));
          lopt = lopt->next;
        }
        lopt->name = name;
        lopt->value = value;
        lopt->desc = NULL;
        get_text(in, &(lopt->desc));
        lopt->next = NULL;
      }
    }
  }
  fclose(in);
}
 
/* --------------------------------------------------------- */
void varinfo_end() {
  var_type *v = vars;
  for (; v;) {
    var_type *v1 = v->next;
    opt_type *o = v->opt;
 
    if (v->name)
      free(v->name);
    if (v->type)
      free(v->type);
    if (v->default_str)
      free(v->default_str);
    if (v->section)
      free(v->section);
    if (v->desc)
      free(v->desc);
    for (; o;) {
      opt_type *o1 = o->next;
      if (o->name)
        free(o->name);
      if (o->value)
        free(o->value);
      if (o->desc)
        free(o->desc);
 
      free(o);
      o = o1;
    }
 
    free(v);
    v = v1;
  }
}
 
/* --------------------------------------------------------- */
void varinfo_getvar(const char * name_c, var_type **var) {
  var_type *lvar;
 
  for (lvar = vars; (lvar != NULL) && (strcasecmp(name_c, lvar->name) != 0);
       lvar = lvar->next)
    ;
 
  *var = lvar;
}
 
/* --------------------------------------------------------- */
void varinfo_getinfo(const var_type **var,
                     char **name, char **type,
                     char **default_str,
                     char **section, char **desc) {
  if (var == NULL) {
    *name = NULL;
    *type = NULL;
    *default_str = NULL;
    *section = NULL;
    *desc = NULL;
  } else {
    *name = (*var)->name;
    *type = (*var)->type;
    *default_str = (*var)->default_str;
    *section = (*var)->section;
    *desc = (*var)->desc;
  }
}
 
/* --------------------------------------------------------- */
void varinfo_getopt(const var_type **var, opt_type **opt) {
  if (*var == NULL)
    *opt = NULL;
  else if (*opt == NULL)
    *opt = (*var)->opt;
  else
    *opt = (*opt)->next;
}
 
/* --------------------------------------------------------- */
 
void varinfo_opt_getinfo(const opt_type **opt, char **name,
                         int64_t *value, char **desc) {
  if (opt == NULL) {
    *name = NULL;
    *desc = NULL;
    *value = 0;
  } else {
    *name = (*opt)->name;
    *desc = (*opt)->desc;
    if ((*opt)->value) {
      if (strncmp("bit", (*opt)->value, 3) == 0) {
        *value = ((int64_t)1) << strtoll((*opt)->value + 4, NULL, 10);
      } else {
        *value = strtoll((*opt)->value, NULL, 10);
      }
 
    } else {
      *value = 0;
    }
  }
}
 
/* ---------------------------------------------------------
 
This function searches for a substring in the name of a variable. If
var is set to NULL, it starts from the beginning of the list. If it is
different from NULL, it assumes it is the result of a previous search and
it starts searching from that point. It returns NULL if nothing is
found.
 
 --------------------------------------------------------- */
 
/* used by liboct_parser/symbols.c */
int varinfo_variable_exists(const char *var_name) {
  var_type *lvar;
  for (lvar = vars; (lvar != NULL) && (strcasecmp(var_name, lvar->name) != 0);
       lvar = lvar->next)
    ;
  return (lvar != NULL);
}
 
void varinfo_search_var(const char * name_c, var_type **var) {
  var_type *lvar;
 
  if (*var == NULL)
    lvar = vars;
  else
    lvar = (*var)->next;
 
  for (; (lvar != NULL) && (strcasestr(lvar->name, name_c) == 0);
       lvar = lvar->next)
    ;
 
  *var = lvar;
}
 
void varinfo_search_option(const var_type **var,
                           const char * name_c, int *value,
                                     int *ierr) {
  opt_type *opt;
 
  opt = (*var)->opt;
  *ierr = -1;
 
  while (opt != NULL) {
    if (strcmp(opt->name, name_c) == 0) {
      *value = atoi(opt->value);
      printf("%s|%s|\n", opt->name, name_c);
      *ierr = 0;
      break;
    }
    opt = opt->next;
  }
}