Subversion Repositories wimsdev

/*    Copyright (C) 1998-2003 XIAO, Gang of Universite de Nice - Sophia Antipolis

 *

 *  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 of the License, 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., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

/* line input / output routines */

#include <stdarg.h>

#include "libwims.h"

/* copy of possibly overlapping strings, to replace strcpy which is not guaranteed in this case

   and indeed produces errors particularly on 64 bits computers */

void ovlstrcpy(char *dest, char *src)

{

  memmove(dest, src, strlen(src)+1);

}

#define int_buf_size 40

/* this is rapid. Output string will be erased at the next call. */

char *int2str(int i)

{

    int neg,t;

    static char int_buf[int_buf_size];

    int_buf[int_buf_size-1]=0;

    neg=0; if(i<0) {neg=1;i=-i;}

    for(t=int_buf_size-2;t>=0;) {

      int_buf[t--]=i%10+'0'; i/=10;

      if(i==0) break;

    }

    if(t<=0) {int_buf[0]=0; return int_buf;} /* should never occur. */

    if(neg) int_buf[t--]='-';

    t++; return int_buf+t;

}

void *xmalloc(size_t n)

{

    void *p;

    p=malloc(n);

    if(p==NULL) {

      fprintf(stderr,"Malloc failure."); exit(1);

    }

    return p;

}

int msleep(int ms)

{

    struct timespec req, rem;

    if(ms<=0) return 0;

    req.tv_sec=ms/1000; req.tv_nsec=(ms%1000)*1000*1000;

    return nanosleep(&req,&rem);

}

  /* dos/mac to unix/linux translation */

void _tolinux(char *p)

{

    char *pp,*p1;

    pp=strchr(p,13); if(pp==NULL) return;

    for(p1=pp; *pp; pp++) {

      if(*pp==13) {

          if(*(pp+1)=='\n' || (pp>p && *(pp-1)=='\n') ||

             (*(pp+1)=='\\' && *(pp+2)=='\n')) continue;

          else *pp='\n';

      }

      *p1++=*pp;

    }

    *p1=0;

}

/* optimized and secure strcpy */

/* copies src to dest, at most lim bytes. Error if more than

   MAX_LINELEN chars would be copied, including final \0. */

void mystrncpy(char *dest, const char *src, size_t lim)

{

      if (lim)

      {

        size_t i = strlen(src);

        if (i >= lim) i = lim-1;

        if (i >= MAX_LINELEN) error("cmd_output_too_long");

        memmove(dest,src,i); dest[i]=0;

      }

}

/* find matching parenthesis.

 * The entrance point should be after the opening

 * parenthesis.

 * Returns NULL if unmatched.

 */

char *find_matching(char *p, char c)

{

    char *pp;

    int parenth, brak, brace;

    if(c=='|') {

      for(pp=p;*pp!=0;pp++) {

          switch(*pp) {

            case '|': return pp;

            case '(': {

              pp=find_matching(pp+1,')');

              if(pp==NULL) return NULL;

              break;

            }

            case '[': {

                pp=find_matching(pp+1,']');

                if(pp==NULL) return NULL;

                break;

            }

            case '{': {

                pp=find_matching(pp+1,'}');

                if(pp==NULL) return NULL;

                break;

            }

            case ')':

            case ']':

            case '}': return NULL;

            default: break;

          }

      }

      return NULL;

    }

    parenth=brak=brace=0;

    for(pp=p; *pp!=0; pp++) {

      switch(*pp) {

          case '[': brak++; break;

          case ']': brak--; break;

          case '(': parenth++; break;

          case ')': parenth--; break;

          case '{': brace++; break;

          case '}': brace--; break;

          default: continue;

      }

      if(parenth<0 || brak<0 || brace<0) {

          if(*pp!=c || parenth>0 || brak>0 || brace>0) return NULL;

          else break;

      }

    }

    if(*pp!=c) return NULL;

    return pp;

}

/* Points to the end of the word */

char *find_word_end(char *p)

{

    while(!myisspace(*p) && *p!=0) p++;

    return p;

}

/* Strips leading spaces */

char *find_word_start(char *p)

{

    while(myisspace(*p)) p++;

    return p;

}

/* find a character in a string, but skipping parentheses. */

char *strparchr(char *p, char c)

{

    char *pp;

    for(pp=p;*pp && *pp!=c && pp-p<MAX_LINELEN; pp++) {

      switch(*pp) {

          case '(': pp=find_matching(pp+1,')'); break;

          case '[': pp=find_matching(pp+1,']'); break;

          case '{': pp=find_matching(pp+1,'}'); break;

      }

      if(pp==NULL) return NULL;

    }

    if(*pp==c) return pp; else return NULL;

}

/* search for string, skipping parentheses */

char *strparstr(char *p, char *fnd)

{

    char *pp, c;

    int n;

    if(*fnd==0) return p+strlen(p);

    c=*fnd; n=strlen(fnd);

    for(pp=p;pp-1!=NULL && *pp!=0; pp++) {

      if(*pp==c && (n==1 || strncmp(pp,fnd,n)==0)) return pp;

      switch(*pp) {

          case '(': pp=find_matching(pp+1,')'); break;

          case '[': pp=find_matching(pp+1,']'); break;

          case '{': pp=find_matching(pp+1,'}'); break;

      }

    }

    if(pp-1==NULL) pp=strstr(p,fnd);

    if(pp!=NULL) return pp;

    else return p+strlen(p);

}

/* Points to the end of an item */

char *find_item_end(char *p)

{

    return strparstr(p,",");

}

/* Points to the end of an item */

char *find_line_end(char *p)

{

    char *pp=strstr(p,"\n");

    if(pp==NULL) pp=p+strlen(p);

    return pp;

}

char *charchr(char *p,char *w)

{

    return strchr(p,w[0]);

}

/* Find first occurrence of word */

char *wordchr(char *p, char *w)

{

    char *r; int n;

    if(*w==0) return NULL;

    n=strlen(w);

    for(r=strstr(p,w);r!=NULL &&

      ( (r>p && !myisspace(*(r-1))) || (!myisspace(*(r+n)) && *(r+n)!=0) );

      r=strstr(r+1,w)){};

    return r;

}

/* Find first occurrence of item */

char *itemchr(char *p, char *w)

{

    char *r, *r1, *r2; int n;

    if(*w==0) return NULL;

    n=strlen(w);

    for(r=strstr(p,w);r!=NULL; r=strstr(r+1,w)) {

      r1=r-1;while(r1>=p && myisspace(*r1)) r1--;

      r2=find_word_start(r+n);

      if((r1<p || *r1==',') && (*r2==0 || *r2==',')) return r;

    }

    return r;

}

/* Find first occurrence of line */

char *linechr(char *p, char *w)

{

    char *r;

    int n;

    if(*w==0) return NULL;

    n=strlen(w);

    for(r=strstr(p,w);r!=NULL; r=strstr(r+1,w)) {

      if((r<=p || *(r-1)=='\n') && (*(r+n)==0 || *(r+n)=='\n'))

        break;

    }

    return r;

}

/* find a variable in a string (math expression).

 * Returns the pointer or NULL. */

char *varchr(char *p, char *v)

{

    char *pp; int n;

    if(*v==0) return NULL;

    n=strlen(v);

    for(pp=strstr(p,v); pp!=NULL; pp=strstr(pp+1,v)) {

      if((pp==p || (!myisalnum(*(pp-1)) && *(pp-1)!='_')) &&

         ((!myisalnum(*(pp+n)) && *(pp+n)!='_' && *(pp+n)!='\'')

          || *(pp+n)==0)) break;

    }

    return pp;

}

int _cutit_(char *p, char *list[], int max, char *end_finder(char *pt), int tag)

{

    int i;

    char *pp, *pe, *p0;

    if(tag&1) pp=find_word_start(p); else pp=p; /* strip head space */

    for(i=0;i<max && *pp;i++) {

      pe=end_finder(pp);

      if((tag&2) && myisspace(pe[-1])) { /* strip trailing space */

          for(p0=pe; p0>pp && myisspace(p0[-1]); p0--);

          if(p0<pe) *p0=0;

      }

      if(*pe) *pe++=0;

      list[i]=pp;

      if(tag&1) pp=find_word_start(pe); else pp=pe;

    }

    return i;

}

int cutitems(char *p, char *list[], int max)

{

    return _cutit_(p,list,max,find_item_end,3);

}

int cutwords(char *p, char *list[], int max)

{

    return _cutit_(find_word_start(p),list,max,find_word_end,1);

}

int cutlines(char *p, char *list[], int max)

{

    return _cutit_(p,list,max,find_line_end,0);

}

int cutchars(char *p, char *list[], int max)

{

    int i; char *pp;

    for(i=0,pp=p;*pp && i<max;list[i++]=pp++);

    return i;

}

/* strip trailing spaces; return string end. */

char *strip_trailing_spaces(char *p)

{

    char *pp;

    if(*p==0) return p;

    for(pp=p+strlen(p)-1; pp>=p && myisspace(*pp); pp--);

    if(pp[1]) pp[1]=0; return pp;

}

        /* Routines for quick search of item in a list. */

/* Verify whether a list is well-ordered. For debugging uses.

 * Returns 0 if order is OK, -1 otherwise. */

int verify_order(void *list, int items, size_t item_size)

{

    int i; char *old, **p;

    p=list; old=*p;

    for(i=item_size;i<items*item_size;i+=item_size) {

      p=list+i;

      if(strcmp(*p,old)<0) {

          fprintf(stderr,"Table disorder: %s > %s",old,*p);

          exit(1);

      }

      old=*p;

    }

    return 0;

}

/* searches a list. Returns index if found, (-1-index of insertion) if nomatch.

 * Uses binary search, list must be sorted. */

int search_list(void *list, int items, size_t item_size, const char *str)

{

 int i = 0;

 while (items > 0)

   {

     int m = items / 2, j = i + m;

     int k = strcmp(*(char **)(list + j * item_size), str);

     if (k == 0) return j;

     if (k > 0) items = m; else {i = j + 1; items -= (m + 1);}

   }

 return ~i;

}

/* Returns number of lines in string p */

unsigned int linenum(char *p)

{

    int i; char *pp;

    /* Ending blank line will be thus removed. */

    i=strlen(p); if(i>1 && *(p+i-1)=='\n') *(p+i-1)=0;

    if(*p=='\n') i=1; else i=0;

    for(pp=p; pp!=NULL && *pp!=0; pp=strchr(pp+1,'\n'), i++);

    return i;

}

/* Returns number of items in the list p, comma separated */

unsigned int itemnum(char *p)

{

    int i; char *pp;

    if(*p==0) return 0;

    for(i=0,pp=p; pp==p || *(pp-1)!=0; pp=find_item_end(pp)+1, i++);

    return i;

}

/* Returns number of words in string p */

unsigned int wordnum(char *p)

{

    int i; char *pp;

    for(i=0, pp=find_word_start(p); *pp!=0; i++) {

      while(!myisspace(*pp) && *pp!=0) pp++;

      while(myisspace(*pp)) pp++;

    }

    return i;

}

/* This is just to suppress an annoying compiler warning message. */

unsigned int charnum(char *p)

{

    return strlen(p);

}

/* find n-th line in string p */

char *fnd_line(char *p, int n, char bf[])

{

    char *pp;

    int i;

    for(i=1,pp=p; pp-1!=NULL && *pp!=0 && i<n; pp=strchr(pp,'\n')+1, i++);

    fnd_position=pp; if(pp-1==NULL) {

      fnd_position=NULL; fnd_nextpos=""; *bf=0; return bf;

    }

    for(i=0; *(pp+i)!=0 && *(pp+i)!='\n'; i++) *(bf+i)=*(pp+i);

    *(bf+i)=0;

    if(pp[i]=='\n') i++; fnd_nextpos=pp+i;

    return bf;

}

/* find n-th item in list p, comma separated */

char *fnd_item(char *p, int n, char bf[])

{

    char *pp, *pe;

    int i;

    for(i=1,pp=p; i<n && (pp==p || *(pp-1)!=0); pp=find_item_end(pp)+1, i++);

    fnd_position=pp; if(pp>p && *(pp-1)==0) {

      fnd_position=NULL; *bf=0; return bf;

    }

    pp=find_word_start(pp); pe=find_item_end(pp);

    if(*pe) fnd_nextpos=pe+1; else fnd_nextpos=pe;

    while(pe>pp && myisspace(*(pe-1))) pe--;

    memmove(bf,pp,pe-pp); bf[pe-pp]=0;

    return bf;

}

/* find n-th word in string p */

char *fnd_word(char *p, int n, char bf[])

{

    char *pp;

    int i;

    for(i=1, pp=find_word_start(p); *pp!=0 && i<n ; i++) {

      while(!myisspace(*pp) && *pp!=0) pp++;

      pp=find_word_start(pp);

    }

    if(*pp) fnd_position=pp; else fnd_position=NULL;

    for(i=0; *(pp+i)!=0 && !myisspace(*(pp+i)); i++) *(bf+i)=*(pp+i);

    fnd_nextpos=find_word_start(pp+i);

    *(bf+i)=0;

    return bf;

}

/* find n-th char in string p */

char *fnd_char(char *p, int n, char bf[])

{

    int t;

    t=strlen(p);

    if(n>t || n<1) {*bf=0;fnd_position=NULL; fnd_nextpos="";}

    else {

      *bf=*(p+n-1); *(bf+1)=0;

      fnd_position=p+n-1;fnd_nextpos=p+n;

    }

    return bf;

}

/* Returns 1 if semicolons changed to new lines */

int rows2lines(char *p)

{

    char *pp, *p2;

    int t;

    if(strchr(p,'\n')!=NULL) return 0;

    for(t=0, pp=p; *pp; pp++) {

      if(*pp=='(') {p2=find_matching(pp+1,')'); if(p2!=NULL) pp=p2; continue;}

      if(*pp=='[') {p2=find_matching(pp+1,']'); if(p2!=NULL) pp=p2; continue;}

      if(*pp=='{') {p2=find_matching(pp+1,'}'); if(p2!=NULL) pp=p2; continue;}

      if(*pp==';') {*pp='\n'; t++; continue;}

      if(*pp=='&' && myisalpha(*(pp+1))) {

          for(p2=pp+1; myisalpha(*p2) && p2-pp<14; p2++);

          pp=p2; continue;

      }

      if(*pp=='&' && *(pp+1)=='#') {

          for(p2=pp+2; myisdigit(*p2) && p2-pp<6; p2++);

          pp=p2; continue;

      }

    }

    return t;

}

void lines2rows(char *p)

{

    char *pp;

    strip_trailing_spaces(p);

    for(pp=strchr(find_word_start(p),'\n'); pp!=NULL; pp=strchr(pp+1,'\n'))

      *pp=';';

}

unsigned int rownum(char *p)

{

    char buf[MAX_LINELEN+1];

    snprintf(buf,sizeof(buf),"%s",p);

    rows2lines(buf);

    return linenum(buf);

}

/* find n-th row in a matrix p */

char *fnd_row(char *p, int n, char bf[])

{

    rows2lines(p); return fnd_line(p,n,bf);

}

/* strstr but may have embedded zeros.

 * Returns memory end if not found.

 * Supposes memory ends with 0.

 */

char *memstr(char *s1, char *s2, int len)

{

    char *p, *pp;

    pp=s1;

    for(p=s1; p<s1+len; p=pp) {

      pp=strstr(p,s2); if(pp!=NULL) break;

      pp=p+strlen(p);

      while(pp<s1+len && *pp==0) pp++;

    }

    return pp;

}

/* Check whether parentheses are balanced in a given string.

 * Returns 0 if OK.

 */

/* style=0: simple check. style<>0: strong check. */

int check_parentheses(char *p, int style)

{

    int i,j,k;

    j=strlen(p);

    if(j>=MAX_LINELEN) return 65535;

    if(style!=0) {

      char buf[MAX_LINELEN+1];

      char *pp, *pe, c;

      for(pp=p;pp<p+j;pp++) {

          switch (*pp) {

            case ')':

            case ']':

            case '}': return -1;

            case '(': c=')'; goto find;

            case '[': c=']'; goto find;

            case '{': c='}';

            find: {

                pe=find_matching(pp+1,c);

                if(pe==NULL) return 1;

                memcpy(buf,pp+1,pe-pp-1);

                buf[pe-pp-1]=0;

                if((k=check_parentheses(buf,1))!=0) return k;

                else pp=pe;

            }

            default: break;

          }

      }

      return 0;

    }

    for(i=k=0;i<j && k>=0;i++) {

      if(*(p+i)=='(') k++;

      if(*(p+i)==')') k--;

    }

    return k;

}

/* Strip enclosing pairs of parentheses */

void strip_enclosing_par(char *p)

{

    char *p1;

    partest: strip_trailing_spaces(p);

    if(*p=='(') {

      p1=find_matching(p+1,')');

      if(p1 && *(p1+1)==0) {

          *p1=0; ovlstrcpy(p,find_word_start(p+1));

          goto partest;

      }

    }

    if(*p=='[') {

      p1=find_matching(p+1,']');

      if(p1 && *(p1+1)==0) {

          *p1=0; ovlstrcpy(p,find_word_start(p+1));

          goto partest;

      }

    }

    if(*p=='{') {

      p1=find_matching(p+1,'}');

      if(p1 && *(p1+1)==0) {

          *p1=0; ovlstrcpy(p,find_word_start(p+1));

          goto partest;

      }

    }

}

/* change all spaces into ' ', and collapse multiple occurences */

void singlespace(char *p)

{

    char *pp, *pt, *p2;

    for(pp=pt=p;*pp;pp++) {

      if(!myisspace(*pp)) {*pt++=*pp; continue; }

      *pt++=' ';

      for(p2=pp+1;myisspace(*p2);p2++){};

      pp=--p2;

    }

    *pt=0;

}

/* collapses all space characters in string. */

void nospace(char *p)

{

    char *pp, *pt;

    for(pp=pt=p;*pp;pp++) if(!myisspace(*pp)) *pt++=*pp;

    *pt=0;

}

void _spaces2_(char *p, char c)

{

    char *pp; int n;

    singlespace(p);

    n=strlen(p); if(*p==' ') {memmove(p,p+1,n);n--;}

    if(n==0) return; if(p[n-1]==' ') p[n-1]=0;

    for(pp=strchr(p,' '); pp; pp=strchr(pp,' ')) *pp++=c;

}

/* change words to items */

void words2items(char *p)