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Annotation of researchv10no/cmd/gre/egpos.c, revision 1.1.1.1

1.1       root        1: #include       "re.h"
                      2: #include       "lre.h"
                      3: #include       "hdr.h"
                      4: 
                      5: #ifndef        POSSTEP
                      6: #define                POSSTEP         (8*1024)
                      7: #endif
                      8: 
                      9: void
                     10: eg_posinit(re_re *r)
                     11: {
                     12:        if(r->nposalloc <= 0)
                     13:                r->nposalloc = POSSTEP;
                     14:        r->posbase = (int *)egmalloc(r->nposalloc*sizeof(int), "posbase");
                     15:        if (!r->posbase)
                     16:                return;
                     17:        r->posnext = 0;
                     18: }
                     19: 
                     20: void
                     21: eg_posset(re_re *r)
                     22: {
                     23:        r->posreset = r->posnext;
                     24: }
                     25: 
                     26: eg_posalloc(re_re *r, int n)
                     27: {
                     28:        register j;
                     29: 
                     30:        if(n < 0){
                     31:                r->posnext = r->posreset;
                     32:                return(-1);
                     33:        }
                     34:        j = r->posnext;
                     35:        r->posnext += n;
                     36:        if(r->posnext >= r->nposalloc){
                     37:                while((r->nposalloc < r->posnext) && (r->nposalloc < 256*1024))
                     38:                        r->nposalloc *= 2;
                     39:                if(r->nposalloc < r->posnext){
                     40:                        r->nposalloc = (r->posnext+POSSTEP-1)/POSSTEP;
                     41:                        r->nposalloc *= POSSTEP;
                     42:                }
                     43:                r->posbase = (int *)egrealloc((char *)r->posbase, r->nposalloc*sizeof(int), "posbase");
                     44:                if (!r->posbase)
                     45:                        return(-1);
                     46:        }
                     47:        return(j);
                     48: }

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