envlist.c

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#include "config.h"
#include <stdbool.h>
#include <stdio.h>
#include "envlist.h"
#include "memory.h"
#include "string2.h"
 
char **EnvList = NULL; 
 
void mutt_envlist_free(void)
{
  if (!EnvList)
    return;
 
  for (char **p = EnvList; p && *p; p++)
    FREE(p);
 
  FREE(&EnvList);
}
 
void mutt_envlist_init(char *envp[])
{
  if (EnvList)
    mutt_envlist_free();
 
  if (!envp)
    return;
 
  char **src = NULL, **dst = NULL;
  int count = 0;
  for (src = envp; src && *src; src++)
    count++;
 
  EnvList = mutt_mem_calloc(count + 1, sizeof(char *));
  for (src = envp, dst = EnvList; src && *src; src++, dst++)
    *dst = mutt_str_dup(*src);
}
 
bool mutt_envlist_set(const char *name, const char *value, bool overwrite)
{
  if (!name)
    return false;
 
  char **envp = EnvList;
  char work[1024] = { 0 };
 
  /* Look for current slot to overwrite */
  int count = 0;
  while (envp && *envp)
  {
    size_t len = mutt_str_startswith(*envp, name);
    if ((len != 0) && ((*envp)[len] == '='))
    {
      if (!overwrite)
        return false;
      break;
    }
    envp++;
    count++;
  }
 
  /* Format var=value string */
  snprintf(work, sizeof(work), "%s=%s", name, NONULL(value));
 
  if (envp && *envp)
  {
    /* slot found, overwrite */
    mutt_str_replace(envp, work);
  }
  else
  {
    /* not found, add new slot */
    mutt_mem_realloc(&EnvList, sizeof(char *) * (count + 2));
    EnvList[count] = mutt_str_dup(work);
    EnvList[count + 1] = NULL;
  }
  return true;
}
 
bool mutt_envlist_unset(const char *name)
{
  if (!name || (name[0] == '\0'))
    return false;
 
  char **envp = EnvList;
 
  int count = 0;
  while (envp && *envp)
  {
    size_t len = mutt_str_startswith(*envp, name);
    if ((len != 0) && ((*envp)[len] == '='))
    {
      FREE(envp);
      /* shuffle down */
      char **save = envp++;
      while (*envp)
      {
        *save++ = *envp++;
        count++;
      }
      *save = NULL;
      mutt_mem_realloc(&EnvList, sizeof(char *) * (count + 1));
      return true;
    }
    envp++;
    count++;
  }
  return false;
}
 
char **mutt_envlist_getlist(void)
{
  return EnvList;
}