+++ /dev/null
-/*
- $Id: marcomp.c,v 1.6 2006-05-10 08:13:28 adam Exp $
-
- marcomp.c - compiler of MARC statements.
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-
-#include <yaz/yaz-util.h>
-
-#include "marcomp.h"
-
-static mc_token mc_gettoken(mc_context *c);
-static void mc_ungettoken(mc_context *c);
-static int mc_getval(mc_context *c);
-static int mc_getdata(mc_context *c, char *s, int sz);
-static void mc_getinterval(mc_context *c, int *start, int *end);
-
-static mc_subfield *mc_mk_subfield(mc_subfield *parent);
-static mc_field *mc_mk_field(void);
-
-static struct mc_errmsg
-{
- mc_errcode code;
- const char *msg;
-} mc_errmsg[] = {
-{EMCOK, "OK"},
-{EMCNOMEM, "NO mem"},
-{EMCF, "not complete field"},
-{EMCSF, "not complete subfield"},
-{EMCSFGROUP, "not closed GROUP"},
-{EMCSFVAR, "not closed VARIANT"},
-{EMCSFINLINE, "not closed IN-LINE"},
-{EMCEND, "not correct errno"}
-};
-mc_errcode mc_errno(mc_context *c)
-{
- return c->errcode;
-}
-const char *mc_error(mc_errcode no)
-{
- if (no >= EMCOK && no<EMCEND)
- return mc_errmsg[no].msg;
- else
- return mc_errmsg[EMCEND].msg;
-}
-mc_context *mc_mk_context(const char *s)
-{
- mc_context *p=0;
-
- if (s && strlen(s))
- {
- p = (mc_context*) xmalloc(sizeof(*p));
-
- if (!p)
- return 0;
-
- memset(p, 0, sizeof(*p));
- p->errcode = EMCOK;
- p->data = s;
- p->len = strlen(s);
- p->crrtok = NOP;
- }
-
- return p;
-}
-void mc_destroy_context(mc_context *c)
-{
- if (c) xfree(c);
-}
-mc_token mc_gettoken(mc_context *c)
-{
- if (c->offset >= c->len)
- return NOP;
-
- switch (*(c->data+c->offset))
- {
- case '{': c->crrtok = LVARIANT; break;
- case '}': c->crrtok = RVARIANT; break;
- case '(': c->crrtok = LGROUP; break;
- case ')': c->crrtok = RGROUP; break;
- case '<': c->crrtok = LINLINE; break;
- case '>': c->crrtok = RINLINE; break;
- case '$': c->crrtok = SUBFIELD; break;
- case '[': c->crrtok = LINTERVAL; break;
- case ']': c->crrtok = RINTERVAL; break;
- default:
- if (isspace(*(unsigned char *) (c->data+c->offset))
- || *(c->data+c->offset) == '\n')
- {
- c->crrtok = NOP;
- }
- else
- {
- c->crrtok = REGULAR;
- c->crrval = *(c->data+c->offset);
- }
- }
-#ifdef DEBUG
- fprintf(stderr, "gettoken(): offset: %d", c->offset);
- if (c->crrtok == REGULAR)
- fprintf(stderr, "<%c>", c->crrval);
- fprintf(stderr, "\n");
-#endif
- c->offset++;
- return c->crrtok;
-}
-void mc_ungettoken(mc_context *c)
-{
- if (c->offset > 0)
- c->offset--;
-}
-int mc_getval(mc_context *c)
-{
- return c->crrval;
-}
-int mc_getdata(mc_context *c, char *s, int sz)
-{
- int i;
-
- for (i=0; i<sz; i++)
- {
- if (mc_gettoken(c)!=REGULAR)
- {
- mc_ungettoken(c);
- break;
- }
- s[i] = mc_getval(c);
- }
- s[i] = '\0';
-
- return i;
-}
-void mc_getinterval(mc_context *c, int *start, int *end)
-{
- char buf[6+1];
- int start_pos, end_pos;
-
- start_pos = end_pos = -1;
-
- if (mc_gettoken(c) == LINTERVAL)
- {
- int i;
-
- for (i=0;i<6;i++)
- {
- mc_token tok = mc_gettoken(c);
-
- if (tok == RINTERVAL || tok == NOP)
- break;
-
- buf[i] = mc_getval(c);
- }
-
- buf[i] = '\0';
- i = sscanf(buf, "%d-%d", &start_pos, &end_pos);
-
- if (i == 1)
- end_pos = start_pos;
- else if ( i == 0)
- {
- start_pos = 0;
- }
- }
- *start = start_pos;
- *end = end_pos;
-}
-mc_field *mc_mk_field(void)
-{
- mc_field *p = (mc_field *)xmalloc(sizeof(*p));
-
- if (p)
- {
- memset(p, 0, sizeof(*p));
- p->name = (char *)xmalloc(SZ_FNAME+1);
- *p->name = '\0';
- p->ind1 = (char *)xmalloc(SZ_IND+1);
- *p->ind1 = '\0';
- p->ind2 = (char *)xmalloc(SZ_IND+1);
- *p->ind2 = '\0';
- p->interval.start = p->interval.end = -1;
- }
- return p;
-}
-void mc_destroy_field(mc_field *p)
-{
- if (!p)
- return;
- if (p->name) xfree(p->name);
- if (p->ind1) xfree(p->ind1);
- if (p->ind2) xfree(p->ind2);
- if (p->list) mc_destroy_subfields_recursive(p->list);
- xfree(p);
-}
-mc_field *mc_getfield(mc_context *c)
-{
- mc_field *pf;
-
- pf = mc_mk_field();
-
- if (!pf)
- {
- c->errcode = EMCNOMEM;
- return 0;
- }
-
- if (mc_getdata(c, pf->name, SZ_FNAME) == SZ_FNAME)
- {
- mc_token nexttok = mc_gettoken(c);
-
- mc_ungettoken(c);
-
- if (nexttok == LINTERVAL)
- {
- mc_getinterval(c, &pf->interval.start, &pf->interval.end);
-#ifdef DEBUG
- fprintf(stderr, "ineterval (%d)-(%d)\n", pf->interval.start,
- pf->interval.end);
-#endif
- }
-
- if ((mc_getdata(c, pf->ind1, SZ_IND) == SZ_IND) &&
- (mc_getdata(c, pf->ind2, SZ_IND) == SZ_IND))
- {
- pf->list = mc_getsubfields(c, 0);
- }
- }
- else
- {
- c->errcode = EMCF;
- mc_destroy_field(pf);
- return 0;
- }
-
- return pf;
-}
-mc_subfield *mc_mk_subfield(mc_subfield *parent)
-{
- mc_subfield *p = (mc_subfield*)xmalloc(sizeof(*p));
-
- if (p)
- {
- memset(p, 0, sizeof(*p));
- p->which = MC_SF;
- p->name = (char *)xmalloc(SZ_SFNAME+1);
- *p->name = '\0';
- p->prefix = (char *)xmalloc(SZ_PREFIX+1);
- *p->prefix = '\0';
- p->suffix = (char *)xmalloc(SZ_SUFFIX+1);
- *p->suffix = '\0';
- p->parent = parent;
- p->interval.start = p->interval.end = -1;
- }
- return p;
-}
-void mc_destroy_subfield(mc_subfield *p)
-{
- if (!p)
- return;
-
- if (p->which == MC_SFGROUP || p->which == MC_SFVARIANT)
- {
- if (p->u.child)
- mc_destroy_subfields_recursive(p->u.child);
- }
- else if (p->which == MC_SF)
- {
- if (p->u.in_line)
- mc_destroy_field(p->u.in_line);
- }
- if (p->name) xfree(p->name);
- if (p->prefix) xfree(p->prefix);
- if (p->suffix) xfree(p->suffix);
- if (p->parent) p->parent->next = p->next;
- xfree(p);
-}
-void mc_destroy_subfields_recursive(mc_subfield *p)
-{
- if (!p)
- return;
-
- mc_destroy_subfields_recursive(p->next);
-
- if (p->which == MC_SFGROUP || p->which == MC_SFVARIANT)
- {
- if (p->u.child)
- mc_destroy_subfields_recursive(p->u.child);
- }
- else if (p->which == MC_SF)
- {
- if (p->u.in_line)
- mc_destroy_field(p->u.in_line);
- }
-
- if (p->name) xfree(p->name);
- if (p->prefix) xfree(p->prefix);
- if (p->suffix) xfree(p->suffix);
- if (p->parent) p->parent->next = 0;
- xfree(p);
-}
-mc_subfield *mc_getsubfields(mc_context *c, mc_subfield *parent)
-{
- mc_subfield *psf=0;
- mc_token tok = mc_gettoken(c);
-
- if (tok == NOP)
- return 0;
-
- if (tok == LGROUP)
- {
- if (!(psf = mc_mk_subfield(parent)))
- {
- c->errcode = EMCNOMEM;
- return 0;
- }
-
- psf->which = MC_SFGROUP;
- psf->u.child = mc_getsubfields(c, psf);
-
- if (mc_gettoken(c) == RGROUP)
- psf->next = mc_getsubfields(c, psf);
- else
- {
- c->errcode = EMCSFGROUP;
- mc_destroy_subfield(psf);
- return 0;
- }
- }
- else if (tok == LVARIANT)
- {
- if (!(psf = mc_mk_subfield(parent)))
- {
- c->errcode = EMCNOMEM;
- return 0;
- }
-
- psf->which = MC_SFVARIANT;
- psf->u.child = mc_getsubfields(c, psf);
-
- if (mc_gettoken(c) == RVARIANT)
- psf->next = mc_getsubfields(c, psf);
- else
- {
- c->errcode = EMCSFVAR;
- mc_destroy_subfield(psf);
- return 0;
- }
- }
- else if (tok == RGROUP || tok == RVARIANT || tok == RINLINE)
- {
- mc_ungettoken(c);
- return 0;
- }
- else if (tok == REGULAR)
- {
- if (!(psf = mc_mk_subfield(parent)))
- {
- c->errcode = EMCNOMEM;
- return 0;
- }
-
- mc_ungettoken(c);
-
- if((mc_getdata(c, psf->prefix, SZ_PREFIX) == SZ_PREFIX) &&
- (mc_gettoken(c) == SUBFIELD) &&
- (mc_getdata(c, psf->name, SZ_SFNAME) == SZ_SFNAME))
- {
- mc_token tok = mc_gettoken(c);
-
- mc_ungettoken(c);
-
- if (tok == LINTERVAL)
- {
- mc_getinterval(c, &psf->interval.start, &psf->interval.end);
- }
- else if (tok == LINLINE)
- {
- mc_gettoken(c);
- psf->u.in_line = mc_getfield(c);
- if (mc_gettoken(c) != RINLINE)
- {
- c->errcode = EMCSFINLINE;
- mc_destroy_subfield(psf);
- return 0;
- }
- }
-
- if (mc_getdata(c, psf->suffix, SZ_SUFFIX) == SZ_SUFFIX)
- {
- psf->which = MC_SF;
- psf->next = mc_getsubfields(c, psf);
- }
- else
- {
- c->errcode = EMCSF;
- mc_destroy_subfield(psf);
- return 0;
- }
- }
- }
- return psf;
-}
-/*
- * Local variables:
- * c-basic-offset: 4
- * indent-tabs-mode: nil
- * End:
- * vim: shiftwidth=4 tabstop=8 expandtab
- */
-
projects / idzebra-moved-to-github.git / blobdiff