2.11BSD#431 - /usr/src/new/PORT/perl.1.0.16/form.c

   1: /* $Header: form.c,v 1.0 87/12/18 13:05:07 root Exp $
   2:  *
   3:  * $Log:	form.c,v $
   4:  * Revision 1.0  87/12/18  13:05:07  root
   5:  * Initial revision
   6:  *
   7:  */
   8: 
   9: #include "handy.h"
  10: #include "EXTERN.h"
  11: #include "search.h"
  12: #include "util.h"
  13: #include "perl.h"
  14: 
  15: /* Forms stuff */
  16: 
  17: #define CHKLEN(allow) \
  18: if (d - orec->o_str + (allow) >= curlen) { \
  19:     curlen = d - orec->o_str; \
  20:     GROWSTR(&orec->o_str,&orec->o_len,orec->o_len + (allow) + 1); \
  21:     d = orec->o_str + curlen;   /* in case it moves */ \
  22:     curlen = orec->o_len - 2; \
  23: }
  24: 
  25: format(orec,fcmd)
  26: register struct outrec *orec;
  27: register FCMD *fcmd;
  28: {
  29:     register char *d = orec->o_str;
  30:     register char *s;
  31:     register int curlen = orec->o_len - 2;
  32:     register int size;
  33:     char tmpchar;
  34:     char *t;
  35:     CMD mycmd;
  36:     STR *str;
  37:     char *chophere;
  38: 
  39:     mycmd.c_type = C_NULL;
  40:     orec->o_lines = 0;
  41:     for (; fcmd; fcmd = fcmd->f_next) {
  42:     CHKLEN(fcmd->f_presize);
  43:     for (s=fcmd->f_pre; *s;) {
  44:         if (*s == '\n') {
  45:         while (d > orec->o_str && (d[-1] == ' ' || d[-1] == '\t'))
  46:             d--;
  47:         if (fcmd->f_flags & FC_NOBLANK &&
  48:           (d == orec->o_str || d[-1] == '\n') ) {
  49:             orec->o_lines--;        /* don't print blank line */
  50:             break;
  51:         }
  52:         }
  53:         *d++ = *s++;
  54:     }
  55:     switch (fcmd->f_type) {
  56:     case F_NULL:
  57:         orec->o_lines++;
  58:         break;
  59:     case F_LEFT:
  60:         str = eval(fcmd->f_expr,Null(char***),(double*)0);
  61:         s = str_get(str);
  62:         size = fcmd->f_size;
  63:         CHKLEN(size);
  64:         chophere = Nullch;
  65:         while (size && *s && *s != '\n') {
  66:         size--;
  67:         if ((*d++ = *s++) == ' ')
  68:             chophere = s;
  69:         }
  70:         if (size)
  71:         chophere = s;
  72:         if (fcmd->f_flags & FC_CHOP) {
  73:         if (!chophere)
  74:             chophere = s;
  75:         size += (s - chophere);
  76:         d -= (s - chophere);
  77:         if (fcmd->f_flags & FC_MORE &&
  78:           *chophere && strNE(chophere,"\n")) {
  79:             while (size < 3) {
  80:             d--;
  81:             size++;
  82:             }
  83:             while (d[-1] == ' ' && size < fcmd->f_size) {
  84:             d--;
  85:             size++;
  86:             }
  87:             *d++ = '.';
  88:             *d++ = '.';
  89:             *d++ = '.';
  90:         }
  91:         s = chophere;
  92:         while (*chophere == ' ' || *chophere == '\n')
  93:             chophere++;
  94:         str_chop(str,chophere);
  95:         }
  96:         if (fcmd->f_next && fcmd->f_next->f_pre[0] == '\n')
  97:         size = 0;           /* no spaces before newline */
  98:         while (size) {
  99:         size--;
 100:         *d++ = ' ';
 101:         }
 102:         break;
 103:     case F_RIGHT:
 104:         t = s = str_get(eval(fcmd->f_expr,Null(char***),(double*)0));
 105:         size = fcmd->f_size;
 106:         CHKLEN(size);
 107:         chophere = Nullch;
 108:         while (size && *s && *s != '\n') {
 109:         size--;
 110:         if (*s++ == ' ')
 111:             chophere = s;
 112:         }
 113:         if (size)
 114:         chophere = s;
 115:         if (fcmd->f_flags & FC_CHOP) {
 116:         if (!chophere)
 117:             chophere = s;
 118:         size += (s - chophere);
 119:         d -= (s - chophere);
 120:         if (fcmd->f_flags & FC_MORE &&
 121:           *chophere && strNE(chophere,"\n")) {
 122:             while (size < 3) {
 123:             d--;
 124:             size++;
 125:             }
 126:             while (d[-1] == ' ' && size < fcmd->f_size) {
 127:             d--;
 128:             size++;
 129:             }
 130:             *d++ = '.';
 131:             *d++ = '.';
 132:             *d++ = '.';
 133:         }
 134:         s = chophere;
 135:         while (*chophere == ' ' || *chophere == '\n')
 136:             chophere++;
 137:         str_chop(str,chophere);
 138:         }
 139:         tmpchar = *s;
 140:         *s = '\0';
 141:         while (size) {
 142:         size--;
 143:         *d++ = ' ';
 144:         }
 145:         size = s - t;
 146:         bcopy(t,d,size);
 147:         d += size;
 148:         *s = tmpchar;
 149:         break;
 150:     case F_CENTER: {
 151:         int halfsize;
 152: 
 153:         t = s = str_get(eval(fcmd->f_expr,Null(char***),(double*)0));
 154:         size = fcmd->f_size;
 155:         CHKLEN(size);
 156:         chophere = Nullch;
 157:         while (size && *s && *s != '\n') {
 158:         size--;
 159:         if (*s++ == ' ')
 160:             chophere = s;
 161:         }
 162:         if (size)
 163:         chophere = s;
 164:         if (fcmd->f_flags & FC_CHOP) {
 165:         if (!chophere)
 166:             chophere = s;
 167:         size += (s - chophere);
 168:         d -= (s - chophere);
 169:         if (fcmd->f_flags & FC_MORE &&
 170:           *chophere && strNE(chophere,"\n")) {
 171:             while (size < 3) {
 172:             d--;
 173:             size++;
 174:             }
 175:             while (d[-1] == ' ' && size < fcmd->f_size) {
 176:             d--;
 177:             size++;
 178:             }
 179:             *d++ = '.';
 180:             *d++ = '.';
 181:             *d++ = '.';
 182:         }
 183:         s = chophere;
 184:         while (*chophere == ' ' || *chophere == '\n')
 185:             chophere++;
 186:         str_chop(str,chophere);
 187:         }
 188:         tmpchar = *s;
 189:         *s = '\0';
 190:         halfsize = size / 2;
 191:         while (size > halfsize) {
 192:         size--;
 193:         *d++ = ' ';
 194:         }
 195:         size = s - t;
 196:         bcopy(t,d,size);
 197:         d += size;
 198:         *s = tmpchar;
 199:         if (fcmd->f_next && fcmd->f_next->f_pre[0] == '\n')
 200:         size = 0;           /* no spaces before newline */
 201:         else
 202:         size = halfsize;
 203:         while (size) {
 204:         size--;
 205:         *d++ = ' ';
 206:         }
 207:         break;
 208:     }
 209:     case F_LINES:
 210:         str = eval(fcmd->f_expr,Null(char***),(double*)0);
 211:         s = str_get(str);
 212:         size = str_len(str);
 213:         CHKLEN(size);
 214:         orec->o_lines += countlines(s);
 215:         bcopy(s,d,size);
 216:         d += size;
 217:         break;
 218:     }
 219:     }
 220:     *d++ = '\0';
 221: }
 222: 
 223: countlines(s)
 224: register char *s;
 225: {
 226:     register int count = 0;
 227: 
 228:     while (*s) {
 229:     if (*s++ == '\n')
 230:         count++;
 231:     }
 232:     return count;
 233: }
 234: 
 235: do_write(orec,stio)
 236: struct outrec *orec;
 237: register STIO *stio;
 238: {
 239:     FILE *ofp = stio->fp;
 240: 
 241: #ifdef DEBUGGING
 242:     if (debug & 256)
 243:     fprintf(stderr,"left=%d, todo=%d\n",stio->lines_left, orec->o_lines);
 244: #endif
 245:     if (stio->lines_left < orec->o_lines) {
 246:     if (!stio->top_stab) {
 247:         STAB *topstab;
 248: 
 249:         if (!stio->top_name)
 250:         stio->top_name = savestr("top");
 251:         topstab = stabent(stio->top_name,FALSE);
 252:         if (!topstab || !topstab->stab_form) {
 253:         stio->lines_left = 100000000;
 254:         goto forget_top;
 255:         }
 256:         stio->top_stab = topstab;
 257:     }
 258:     if (stio->lines_left >= 0)
 259:         putc('\f',ofp);
 260:     stio->lines_left = stio->page_len;
 261:     stio->page++;
 262:     format(&toprec,stio->top_stab->stab_form);
 263:     fputs(toprec.o_str,ofp);
 264:     stio->lines_left -= toprec.o_lines;
 265:     }
 266:   forget_top:
 267:     fputs(orec->o_str,ofp);
 268:     stio->lines_left -= orec->o_lines;
 269: }

Defined functions

Defined macros