type.c
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:10k
- #include <stdio.h>
- #include <string.h>
- #include <stdlib.h>
- #include "extern.h"
- /* malloc + error check */
- void *
- mm_alloc(size_t size)
- {
- void *ptr = malloc(size);
- if (ptr == NULL)
- {
- fprintf(stderr, "Out of memoryn");
- exit(OUT_OF_MEMORY);
- }
- return ptr;
- }
- /* strdup + error check */
- char *
- mm_strdup(const char *string)
- {
- char *new = strdup(string);
- if (new == NULL)
- {
- fprintf(stderr, "Out of memoryn");
- exit(OUT_OF_MEMORY);
- }
- return new;
- }
- /* duplicate memberlist */
- struct ECPGstruct_member *
- ECPGstruct_member_dup(struct ECPGstruct_member * rm)
- {
- struct ECPGstruct_member *new = NULL;
- while (rm)
- {
- struct ECPGtype *type;
- switch (rm->typ->typ)
- {
- case ECPGt_struct:
- case ECPGt_union:
- type = ECPGmake_struct_type(rm->typ->u.members, rm->typ->typ);
- break;
- case ECPGt_array:
- type = ECPGmake_array_type(ECPGmake_simple_type(rm->typ->u.element->typ, rm->typ->u.element->size), rm->typ->size);
- break;
- default:
- type = ECPGmake_simple_type(rm->typ->typ, rm->typ->size);
- break;
- }
- ECPGmake_struct_member(rm->name, type, &new);
- rm = rm->next;
- }
- return (new);
- }
- /* The NAME argument is copied. The type argument is preserved as a pointer. */
- void
- ECPGmake_struct_member(char *name, struct ECPGtype * type, struct ECPGstruct_member ** start)
- {
- struct ECPGstruct_member *ptr,
- *ne =
- (struct ECPGstruct_member *) mm_alloc(sizeof(struct ECPGstruct_member));
- ne->name = strdup(name);
- ne->typ = type;
- ne->next = NULL;
- for (ptr = *start; ptr && ptr->next; ptr = ptr->next);
- if (ptr)
- ptr->next = ne;
- else
- *start = ne;
- }
- struct ECPGtype *
- ECPGmake_simple_type(enum ECPGttype typ, long siz)
- {
- struct ECPGtype *ne = (struct ECPGtype *) mm_alloc(sizeof(struct ECPGtype));
- ne->typ = typ;
- ne->size = siz;
- ne->u.element = 0;
- return ne;
- }
- struct ECPGtype *
- ECPGmake_array_type(struct ECPGtype * typ, long siz)
- {
- struct ECPGtype *ne = ECPGmake_simple_type(ECPGt_array, siz);
- ne->u.element = typ;
- return ne;
- }
- struct ECPGtype *
- ECPGmake_struct_type(struct ECPGstruct_member * rm, enum ECPGttype type)
- {
- struct ECPGtype *ne = ECPGmake_simple_type(type, 1);
- ne->u.members = ECPGstruct_member_dup(rm);
- return ne;
- }
- static const char *
- get_type(enum ECPGttype typ)
- {
- switch (typ)
- {
- case ECPGt_char:
- return ("ECPGt_char");
- break;
- case ECPGt_unsigned_char:
- return ("ECPGt_unsigned_char");
- break;
- case ECPGt_short:
- return ("ECPGt_short");
- break;
- case ECPGt_unsigned_short:
- return ("ECPGt_unsigned_short");
- break;
- case ECPGt_int:
- return ("ECPGt_int");
- break;
- case ECPGt_unsigned_int:
- return ("ECPGt_unsigned_int");
- break;
- case ECPGt_long:
- return ("ECPGt_long");
- break;
- case ECPGt_unsigned_long:
- return ("ECPGt_unsigned_int");
- break;
- case ECPGt_float:
- return ("ECPGt_float");
- break;
- case ECPGt_double:
- return ("ECPGt_double");
- break;
- case ECPGt_bool:
- return ("ECPGt_bool");
- break;
- case ECPGt_varchar:
- return ("ECPGt_varchar");
- case ECPGt_NO_INDICATOR: /* no indicator */
- return ("ECPGt_NO_INDICATOR");
- break;
- case ECPGt_char_variable: /* string that should not be
- * quoted */
- return ("ECPGt_char_variable");
- break;
- default:
- sprintf(errortext, "illegal variable type %dn", typ);
- yyerror(errortext);
- }
- return NULL;
- }
- /* Dump a type.
- The type is dumped as:
- type-tag <comma> - enum ECPGttype
- reference-to-variable <comma> - void *
- size <comma> - long size of this field (if varchar)
- arrsize <comma> - long number of elements in the arr
- offset <comma> - offset to the next element
- Where:
- type-tag is one of the simple types or varchar.
- reference-to-variable can be a reference to a struct element.
- arrsize is the size of the array in case of array fetches. Otherwise 0.
- size is the maxsize in case it is a varchar. Otherwise it is the size of
- the variable (required to do array fetches of structs).
- */
- static void ECPGdump_a_simple(FILE *o, const char *name, enum ECPGttype typ,
- long varcharsize,
- long arrsiz, const char *siz, const char *prefix);
- static void ECPGdump_a_struct(FILE *o, const char *name, const char *ind_name, long arrsiz,
- struct ECPGtype * typ, struct ECPGtype * ind_typ, const char *offset, const char *prefix, const char *ind_prefix);
- void
- ECPGdump_a_type(FILE *o, const char *name, struct ECPGtype * typ, const char *ind_name, struct ECPGtype * ind_typ, const char *prefix, const char *ind_prefix)
- {
- if (ind_typ == NULL)
- {
- ind_typ = &ecpg_no_indicator;
- ind_name = "no_indicator";
- }
- switch (typ->typ)
- {
- case ECPGt_array:
- switch (typ->u.element->typ)
- {
- case ECPGt_array:
- yyerror("No nested arrays allowed (except strings)"); /* array of array */
- break;
- case ECPGt_struct:
- case ECPGt_union:
- ECPGdump_a_struct(o, name, ind_name, typ->size, typ->u.element, ind_typ->u.element, NULL, prefix, ind_prefix);
- break;
- default:
- if (!IS_SIMPLE_TYPE(typ->u.element->typ))
- yyerror("Internal error: unknown datatype, please inform pgsql-bugs@postgresql.org");
- ECPGdump_a_simple(o, name, typ->u.element->typ,
- typ->u.element->size, typ->size, NULL, prefix);
- if (ind_typ->typ == ECPGt_NO_INDICATOR)
- ECPGdump_a_simple(o, ind_name, ind_typ->typ, ind_typ->size, -1, NULL, ind_prefix);
- else
- {
- if (ind_typ->typ != ECPGt_array)
- {
- fprintf(stderr, "Indicator for an array has to be array too.n");
- exit(INDICATOR_NOT_ARRAY);
- }
- ECPGdump_a_simple(o, ind_name, ind_typ->u.element->typ,
- ind_typ->u.element->size, ind_typ->size, NULL, prefix);
- }
- }
- break;
- case ECPGt_struct:
- ECPGdump_a_struct(o, name, ind_name, 1, typ, ind_typ, NULL, prefix, ind_prefix);
- break;
- case ECPGt_union: /* cannot dump a complete union */
- yyerror("Type of union has to be specified");
- break;
- case ECPGt_char_variable:
- ECPGdump_a_simple(o, name, typ->typ, 1, 1, NULL, prefix);
- ECPGdump_a_simple(o, ind_name, ind_typ->typ, ind_typ->size, -1, NULL, ind_prefix);
- break;
- default:
- ECPGdump_a_simple(o, name, typ->typ, typ->size, -1, NULL, prefix);
- ECPGdump_a_simple(o, ind_name, ind_typ->typ, ind_typ->size, -1, NULL, ind_prefix);
- break;
- }
- }
- /* If siz is NULL, then the offset is 0, if not use siz as a
- string, it represents the offset needed if we are in an array of structs. */
- static void
- ECPGdump_a_simple(FILE *o, const char *name, enum ECPGttype typ,
- long varcharsize,
- long arrsize,
- const char *siz,
- const char *prefix
- )
- {
- if (typ == ECPGt_NO_INDICATOR)
- fprintf(o, "ntECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ");
- else
- {
- char *variable = (char *) mm_alloc(strlen(name) + ((prefix == NULL) ? 0 : strlen(prefix)) + 4);
- char *offset = (char *) mm_alloc(strlen(name) + strlen("sizeof(struct varchar_)") + 1);
- /* we have to use the pointer except for arrays with given bounds */
- if (arrsize > 0)
- sprintf(variable, "(%s%s)", prefix ? prefix : "", name);
- else
- sprintf(variable, "&(%s%s)", prefix ? prefix : "", name);
- switch (typ)
- {
- case ECPGt_varchar:
- sprintf(offset, "sizeof(struct varchar_%s)", name);
- break;
- case ECPGt_char:
- case ECPGt_unsigned_char:
- case ECPGt_char_variable:
- sprintf(offset, "%ld*sizeof(char)", varcharsize == 0 ? 1 : varcharsize);
- break;
- default:
- sprintf(offset, "sizeof(%s)", ECPGtype_name(typ));
- break;
- }
- if (arrsize < 0)
- arrsize = 1;
- if (siz == NULL)
- fprintf(o, "nt%s,%s,%ldL,%ldL,%s, ", get_type(typ), variable, varcharsize, arrsize, offset);
- else
- fprintf(o, "nt%s,%s,%ldL,%ldL,%s, ", get_type(typ), variable, varcharsize, arrsize, siz);
- free(variable);
- free(offset);
- }
- }
- /* Penetrate a struct and dump the contents. */
- static void
- ECPGdump_a_struct(FILE *o, const char *name, const char *ind_name, long arrsiz, struct ECPGtype * typ, struct ECPGtype * ind_typ, const char *offsetarg, const char *prefix, const char *ind_prefix)
- {
- /*
- * If offset is NULL, then this is the first recursive level. If not
- * then we are in a struct in a struct and the offset is used as
- * offset.
- */
- struct ECPGstruct_member *p,
- *ind_p = NULL;
- char obuf[BUFSIZ];
- char pbuf[BUFSIZ],
- ind_pbuf[BUFSIZ];
- const char *offset;
- if (offsetarg == NULL)
- {
- sprintf(obuf, "sizeof(%s)", name);
- offset = obuf;
- }
- else
- offset = offsetarg;
- sprintf(pbuf, "%s%s.", prefix ? prefix : "", name);
- prefix = pbuf;
- sprintf(ind_pbuf, "%s%s.", ind_prefix ? ind_prefix : "", ind_name);
- ind_prefix = ind_pbuf;
- if (ind_typ != NULL)
- ind_p = ind_typ->u.members;
- for (p = typ->u.members; p; p = p->next)
- {
- ECPGdump_a_type(o, p->name, p->typ, (ind_p != NULL) ? ind_p->name : NULL, (ind_p != NULL) ? ind_p->typ : NULL, prefix, ind_prefix);
- if (ind_p != NULL)
- ind_p = ind_p->next;
- }
- }
- void
- ECPGfree_struct_member(struct ECPGstruct_member * rm)
- {
- while (rm)
- {
- struct ECPGstruct_member *p = rm;
- rm = rm->next;
- free(p->name);
- free(p->typ);
- free(p);
- }
- }
- void
- ECPGfree_type(struct ECPGtype * typ)
- {
- if (!IS_SIMPLE_TYPE(typ->typ))
- {
- switch (typ->typ)
- {
- case ECPGt_array:
- switch (typ->u.element->typ)
- {
- case ECPGt_array:
- yyerror("internal error, found multi-dimensional arrayn");
- break;
- case ECPGt_struct:
- case ECPGt_union:
- /* Array of structs. */
- ECPGfree_struct_member(typ->u.element->u.members);
- free(typ->u.members);
- break;
- default:
- if (!IS_SIMPLE_TYPE(typ->u.element->typ))
- yyerror("Internal error: unknown datatype, please inform pgsql-bugs@postgresql.org");
- free(typ->u.element);
- }
- break;
- case ECPGt_struct:
- case ECPGt_union:
- ECPGfree_struct_member(typ->u.members);
- free(typ->u.members);
- break;
- default:
- sprintf(errortext, "illegal variable type %dn", typ->typ);
- yyerror(errortext);
- break;
- }
- }
- free(typ);
- }