rcvars.c

   1
   2
   3 #undef _GNU_SOURCE
   4 #define _GNU_SOURCE
   5 #include <string.h>
   6 #include <stdlib.h>
   7 #include <ctype.h>
   8
   9
  10 #include "defs.h"
  11 #include "rc.h"
  12
  13
  14
  15
  16
  17
  18 static rcvar_t *rcvars;
  19
  20 static int nvars;
  21
  22
  23
  24
  25
  26 void rc_export(rcvar_t *v)
  27 {
  28         const rcvar_t end = RCV_END;
  29
  30         if (!v) return;
  31         nvars++;
  32         rcvars = realloc(rcvars, sizeof (rcvar_t) * (nvars+1));
  33         if (!rcvars)
  34                 die("out of memory adding rcvar %s\n", v->name);
  35         rcvars[nvars-1] = *v;
  36         rcvars[nvars] = end;
  37 }
  38
  39 void rc_exportvars(rcvar_t *vars)
  40 {
  41         while(vars->type)
  42                 rc_export(vars++);
  43 }
  44
  45
  46
  47 int rc_findvar(char *name)
  48 {
  49         int i;
  50         if (!rcvars) return -1;
  51         for (i = 0; rcvars[i].name; i++)
  52                 if (!strcmp(rcvars[i].name, name))
  53                         break;
  54         if (!rcvars[i].name)
  55                 return -1;
  56         return i;
  57 }
  58
  59
  60 int my_atoi(const char *s)
  61 {
  62         int a = 0;
  63         if (*s == '0')
  64         {
  65                 s++;
  66                 if (*s == 'x' || *s == 'X')
  67                 {
  68                         s++;
  69                         while (*s)
  70                         {
  71                                 if (isdigit(*s))
  72                                         a = (a<<4) + *s - '0';
  73                                 else if (strchr("ABCDEF", *s))
  74                                         a = (a<<4) + *s - 'A' + 10;
  75                                 else if (strchr("abcdef", *s))
  76                                         a = (a<<4) + *s - 'a' + 10;
  77                                 else return a;
  78                                 s++;
  79                         }
  80                         return a;
  81                 }
  82                 while (*s)
  83                 {
  84                         if (strchr("01234567", *s))
  85                                 a = (a<<3) + *s - '0';
  86                         else return a;
  87                         s++;
  88                 }
  89                 return a;
  90         }
  91         if (*s == '-')
  92         {
  93                 s++;
  94                 for (;;)
  95                 {
  96                         if (isdigit(*s))
  97                                 a = (a*10) + *s - '0';
  98                         else return -a;
  99                         s++;
 100                 }
 101         }
 102         while (*s)
 103         {
 104                 if (isdigit(*s))
 105                         a = (a*10) + *s - '0';
 106                 else return a;
 107                 s++;
 108         }
 109         return a;
 110 }
 111
 112
 113 int rc_setvar_n(int i, int c, char **v)
 114 {
 115         int j;
 116         int *n;
 117         char **s;
 118
 119         switch (rcvars[i].type)
 120         {
 121         case rcv_int:
 122                 if (c < 1) return -1;
 123                 n = (int *)rcvars[i].mem;
 124                 *n = my_atoi(v[0]);
 125                 return 0;
 126         case rcv_string:
 127                 if (c < 1) return -1;
 128                 s = (char **)rcvars[i].mem;
 129                 if (*s) free(*s);
 130                 *s = strdup(v[0]);
 131                 if (!*s)
 132                         die("out of memory setting rcvar %s\n", rcvars[i].name);
 133                 return 0;
 134         case rcv_vector:
 135                 if (c > rcvars[i].len)
 136                         c = rcvars[i].len;
 137                 for (j = 0; j < c ; j++)
 138                         ((int *)rcvars[i].mem)[j] = my_atoi(v[j]);
 139                 return 0;
 140         case rcv_bool:
 141                 if (c < 1 || atoi(v[0]) || strchr("yYtT", v[0][0]))
 142                         *(int *)rcvars[i].mem = 1;
 143                 else if (strchr("0nNfF", v[0][0]))
 144                         *(int *)rcvars[i].mem = 0;
 145                 else
 146                         return -1;
 147                 return 0;
 148         }
 149         return -1;
 150 }
 151
 152
 153 int rc_setvar(char *name, int c, char **v)
 154 {
 155         int i;
 156
 157         i = rc_findvar(name);
 158         if (i < 0) return i;
 159
 160         return rc_setvar_n(i, c, v);
 161 }
 162
 163
 164 void *rc_getmem_n(int i)
 165 {
 166         return rcvars[i].mem;
 167 }
 168
 169
 170 void *rc_getmem(char *name)
 171 {
 172         int i;
 173         i = rc_findvar(name);
 174         if (i < 0) return NULL;
 175         return rcvars[i].mem;
 176 }
 177
 178 int rc_getint_n(int i)
 179 {
 180         if (i < 0) return 0;
 181         switch (rcvars[i].type)
 182         {
 183         case rcv_int:
 184         case rcv_bool:
 185                 return *(int *)rcvars[i].mem;
 186         }
 187         return 0;
 188 }
 189
 190 int *rc_getvec_n(int i)
 191 {
 192         if (i < 0) return NULL;
 193         switch (rcvars[i].type)
 194         {
 195         case rcv_int:
 196         case rcv_bool:
 197         case rcv_vector:
 198                 return (int *)rcvars[i].mem;
 199         }
 200         return NULL;
 201 }
 202
 203 char *rc_getstr_n(int i)
 204 {
 205         if (i < 0) return 0;
 206         switch (rcvars[i].type)
 207         {
 208         case rcv_string:
 209                 return *(char **)rcvars[i].mem;
 210         }
 211         return 0;
 212 }
 213
 214 int rc_getint(char *name)
 215 {
 216         return rc_getint_n(rc_findvar(name));
 217 }
 218
 219 int *rc_getvec(char *name)
 220 {
 221         return rc_getvec_n(rc_findvar(name));
 222 }
 223
 224 char *rc_getstr(char *name)
 225 {
 226         return rc_getstr_n(rc_findvar(name));
 227 }
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