ref: c11957a7915d355d80ff7e6a21721ba05441ca29
dir: /libdraw/buildfont.c/
#include "lib9.h" #include "draw.h" #include "kernel.h" static char* skip(char *s) { while(*s==' ' || *s=='\n' || *s=='\t') s++; return s; } Font* buildfont(Display *d, char *buf, char *name) { Font *fnt; Cachefont *c; char *s, *t; ulong min, max; int offset; char badform[] = "bad font format: number expected (char position %d)"; s = buf; fnt = malloc(sizeof(Font)); if(fnt == 0) return 0; memset(fnt, 0, sizeof(Font)); fnt->display = d; fnt->name = strdup(name); fnt->ncache = NFCACHE+NFLOOK; fnt->nsubf = NFSUBF; fnt->cache = malloc(fnt->ncache * sizeof(fnt->cache[0])); fnt->subf = malloc(fnt->nsubf * sizeof(fnt->subf[0])); if(fnt->name==0 || fnt->cache==0 || fnt->subf==0){ Err2: free(fnt->name); free(fnt->cache); free(fnt->subf); free(fnt->sub); free(fnt); return 0; } fnt->height = strtol(s, &s, 0); s = skip(s); fnt->ascent = strtol(s, &s, 0); s = skip(s); if(fnt->height<=0 || fnt->ascent<=0){ kwerrstr("bad height or ascent in font file"); goto Err2; } fnt->width = 0; fnt->nsub = 0; fnt->sub = 0; memset(fnt->subf, 0, fnt->nsubf * sizeof(fnt->subf[0])); memset(fnt->cache, 0, fnt->ncache*sizeof(fnt->cache[0])); fnt->age = 1; do{ /* must be looking at a number now */ if(*s<'0' || '9'<*s){ kwerrstr(badform, s-buf); goto Err3; } min = strtol(s, &s, 0); s = skip(s); /* must be looking at a number now */ if(*s<'0' || '9'<*s){ kwerrstr(badform, s-buf); goto Err3; } max = strtol(s, &s, 0); s = skip(s); if(*s==0 || min>=Runemax || max>=Runemax || min>max){ kwerrstr("illegal subfont range"); Err3: freefont(fnt); return 0; } t = s; offset = strtol(s, &t, 0); if(t>s && (*t==' ' || *t=='\t' || *t=='\n')) s = skip(t); else offset = 0; fnt->sub = realloc(fnt->sub, (fnt->nsub+1)*sizeof(Cachefont*)); if(fnt->sub == 0){ /* realloc manual says fnt->sub may have been destroyed */ fnt->nsub = 0; goto Err3; } c = malloc(sizeof(Cachefont)); if(c == 0) goto Err3; fnt->sub[fnt->nsub] = c; c->min = min; c->max = max; c->offset = offset; t = s; while(*s && *s!=' ' && *s!='\n' && *s!='\t') s++; *s++ = 0; c->subfontname = 0; c->name = strdup(t); if(c->name == 0){ free(c); goto Err3; } s = skip(s); fnt->nsub++; }while(*s); return fnt; } void freefont(Font *f) { int i; Cachefont *c; Subfont *s; if(f == 0) return; for(i=0; i<f->nsub; i++){ c = f->sub[i]; free(c->subfontname); free(c->name); free(c); } for(i=0; i<f->nsubf; i++){ s = f->subf[i].f; /* if(s && s!=display->defaultsubfont)*/ /* Plan 9 uses this */ if(s) freesubfont(s); } freeimage(f->cacheimage); free(f->name); free(f->cache); free(f->subf); free(f->sub); free(f); }