mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-06 02:59:19 +02:00
f0212ced68
- Synced pgc.l with scan.l. - Synced keyword.c. - Include the remaining patches by Christof Petig <christof.petig@wtal.de>.
502 lines
12 KiB
C
502 lines
12 KiB
C
#include "postgres_fe.h"
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#include "extern.h"
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/* malloc + error check */
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void *
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mm_alloc(size_t size)
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{
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void *ptr = malloc(size);
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if (ptr == NULL)
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{
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fprintf(stderr, "Out of memory\n");
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exit(OUT_OF_MEMORY);
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}
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return ptr;
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}
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/* strdup + error check */
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char *
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mm_strdup(const char *string)
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{
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char *new = strdup(string);
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if (new == NULL)
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{
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fprintf(stderr, "Out of memory\n");
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exit(OUT_OF_MEMORY);
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}
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return new;
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}
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/* duplicate memberlist */
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struct ECPGstruct_member *
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ECPGstruct_member_dup(struct ECPGstruct_member * rm)
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{
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struct ECPGstruct_member *new = NULL;
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while (rm)
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{
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struct ECPGtype *type;
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switch (rm->typ->typ)
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{
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case ECPGt_struct:
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case ECPGt_union:
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type = ECPGmake_struct_type(rm->typ->u.members, rm->typ->typ);
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break;
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case ECPGt_array:
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type = ECPGmake_array_type(ECPGmake_simple_type(rm->typ->u.element->typ, rm->typ->u.element->size), rm->typ->size);
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break;
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default:
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type = ECPGmake_simple_type(rm->typ->typ, rm->typ->size);
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break;
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}
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ECPGmake_struct_member(rm->name, type, &new);
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rm = rm->next;
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}
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return (new);
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}
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/* The NAME argument is copied. The type argument is preserved as a pointer. */
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void
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ECPGmake_struct_member(char *name, struct ECPGtype * type, struct ECPGstruct_member ** start)
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{
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struct ECPGstruct_member *ptr,
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*ne =
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(struct ECPGstruct_member *) mm_alloc(sizeof(struct ECPGstruct_member));
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ne->name = strdup(name);
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ne->typ = type;
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ne->next = NULL;
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for (ptr = *start; ptr && ptr->next; ptr = ptr->next);
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if (ptr)
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ptr->next = ne;
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else
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*start = ne;
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}
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struct ECPGtype *
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ECPGmake_simple_type(enum ECPGttype typ, long siz)
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{
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struct ECPGtype *ne = (struct ECPGtype *) mm_alloc(sizeof(struct ECPGtype));
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ne->typ = typ;
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ne->size = siz;
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ne->u.element = 0;
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return ne;
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}
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struct ECPGtype *
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ECPGmake_array_type(struct ECPGtype * typ, long siz)
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{
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struct ECPGtype *ne = ECPGmake_simple_type(ECPGt_array, siz);
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ne->u.element = typ;
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return ne;
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}
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struct ECPGtype *
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ECPGmake_struct_type(struct ECPGstruct_member * rm, enum ECPGttype type)
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{
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struct ECPGtype *ne = ECPGmake_simple_type(type, 1);
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ne->u.members = ECPGstruct_member_dup(rm);
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return ne;
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}
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static const char *
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get_type(enum ECPGttype typ)
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{
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switch (typ)
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{
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case ECPGt_char:
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return ("ECPGt_char");
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break;
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case ECPGt_unsigned_char:
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return ("ECPGt_unsigned_char");
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break;
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case ECPGt_short:
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return ("ECPGt_short");
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break;
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case ECPGt_unsigned_short:
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return ("ECPGt_unsigned_short");
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break;
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case ECPGt_int:
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return ("ECPGt_int");
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break;
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case ECPGt_unsigned_int:
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return ("ECPGt_unsigned_int");
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break;
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case ECPGt_long:
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return ("ECPGt_long");
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break;
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case ECPGt_unsigned_long:
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return ("ECPGt_unsigned_long");
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break;
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case ECPGt_long_long:
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return ("ECPGt_long_long");
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break;
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case ECPGt_unsigned_long_long:
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return ("ECPGt_unsigned_long_long");
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break;
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case ECPGt_float:
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return ("ECPGt_float");
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break;
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case ECPGt_double:
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return ("ECPGt_double");
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break;
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case ECPGt_bool:
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return ("ECPGt_bool");
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break;
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case ECPGt_varchar:
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return ("ECPGt_varchar");
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case ECPGt_NO_INDICATOR: /* no indicator */
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return ("ECPGt_NO_INDICATOR");
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break;
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case ECPGt_char_variable: /* string that should not be
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* quoted */
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return ("ECPGt_char_variable");
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break;
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case ECPGt_descriptor:
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return ("ECPGt_descriptor");
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break;
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default:
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sprintf(errortext, "illegal variable type %d\n", typ);
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yyerror(errortext);
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}
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return NULL;
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}
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/* Dump a type.
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The type is dumped as:
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type-tag <comma> - enum ECPGttype
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reference-to-variable <comma> - void *
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size <comma> - long size of this field (if varchar)
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arrsize <comma> - long number of elements in the arr
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offset <comma> - offset to the next element
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Where:
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type-tag is one of the simple types or varchar.
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reference-to-variable can be a reference to a struct element.
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arrsize is the size of the array in case of array fetches. Otherwise 0.
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size is the maxsize in case it is a varchar. Otherwise it is the size of
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the variable (required to do array fetches of structs).
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*/
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static void ECPGdump_a_simple(FILE *o, const char *name, enum ECPGttype typ,
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long varcharsize,
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long arrsiz, const char *siz, const char *prefix);
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static void ECPGdump_a_struct(FILE *o, const char *name, const char *ind_name, long arrsiz,
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struct ECPGtype * typ, struct ECPGtype * ind_typ, const char *offset, const char *prefix, const char *ind_prefix);
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void
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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)
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{
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/* if (ind_typ == NULL)
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{
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ind_typ = &ecpg_no_indicator;
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ind_name = "no_indicator";
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}*/
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switch (typ->typ)
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{
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case ECPGt_array:
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switch (typ->u.element->typ)
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{
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case ECPGt_array:
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yyerror("No nested arrays allowed (except strings)"); /* array of array */
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break;
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case ECPGt_struct:
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case ECPGt_union:
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ECPGdump_a_struct(o, name, ind_name, typ->size, typ->u.element, ind_typ->u.element, NULL, prefix, ind_prefix);
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break;
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default:
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if (!IS_SIMPLE_TYPE(typ->u.element->typ))
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yyerror("Internal error: unknown datatype, please inform pgsql-bugs@postgresql.org");
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ECPGdump_a_simple(o, name, typ->u.element->typ,
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typ->u.element->size, typ->size, NULL, prefix);
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if (ind_typ != NULL)
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{
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if (ind_typ->typ == ECPGt_NO_INDICATOR)
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ECPGdump_a_simple(o, ind_name, ind_typ->typ, ind_typ->size, -1, NULL, ind_prefix);
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else
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{
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if (ind_typ->typ != ECPGt_array)
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{
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fprintf(stderr, "Indicator for an array has to be array too.\n");
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exit(INDICATOR_NOT_ARRAY);
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}
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ECPGdump_a_simple(o, ind_name, ind_typ->u.element->typ,
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ind_typ->u.element->size, ind_typ->size, NULL, prefix);
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}
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}
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}
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break;
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case ECPGt_struct:
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ECPGdump_a_struct(o, name, ind_name, 1, typ, ind_typ, NULL, prefix, ind_prefix);
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break;
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case ECPGt_union: /* cannot dump a complete union */
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yyerror("Type of union has to be specified");
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break;
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case ECPGt_char_variable:
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ECPGdump_a_simple(o, name, typ->typ, 1, 1, NULL, prefix);
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ECPGdump_a_simple(o, ind_name, ind_typ->typ, ind_typ->size, -1, NULL, ind_prefix);
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break;
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case ECPGt_descriptor:
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ECPGdump_a_simple(o, name, typ->typ, 0, -1, NULL, prefix);
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ECPGdump_a_simple(o, ind_name, ind_typ->typ, ind_typ->size, -1, NULL, ind_prefix);
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break;
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default:
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ECPGdump_a_simple(o, name, typ->typ, typ->size, -1, NULL, prefix);
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if (ind_typ != NULL)
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ECPGdump_a_simple(o, ind_name, ind_typ->typ, ind_typ->size, -1, NULL, ind_prefix);
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break;
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}
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}
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/* If siz is NULL, then the offset is 0, if not use siz as a
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string, it represents the offset needed if we are in an array of structs. */
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static void
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ECPGdump_a_simple(FILE *o, const char *name, enum ECPGttype typ,
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long varcharsize,
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long arrsize,
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const char *siz,
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const char *prefix
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)
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{
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if (typ == ECPGt_NO_INDICATOR)
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fprintf(o, "\n\tECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ");
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else if (typ == ECPGt_descriptor)
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/* remember that name here already contains quotes (if needed) */
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fprintf(o, "\n\tECPGt_descriptor, %s, 0L, 0L, 0L, ", name);
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else
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{
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char *variable = (char *) mm_alloc(strlen(name) + ((prefix == NULL) ? 0 : strlen(prefix)) + 4);
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char *offset = (char *) mm_alloc(strlen(name) + strlen("sizeof(struct varchar_)") + 1);
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switch (typ)
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{
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case ECPGt_varchar:
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/*
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* we have to use the pointer except for arrays with given
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* bounds
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*/
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if (arrsize > 0)
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sprintf(variable, "(%s%s)", prefix ? prefix : "", name);
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else
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sprintf(variable, "&(%s%s)", prefix ? prefix : "", name);
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sprintf(offset, "sizeof(struct varchar_%s)", name);
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break;
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case ECPGt_char:
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case ECPGt_unsigned_char:
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case ECPGt_char_variable:
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/*
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* we have to use the pointer except for arrays with given
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* bounds
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*/
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if (varcharsize > 1 || arrsize > 0)
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sprintf(variable, "(%s%s)", prefix ? prefix : "", name);
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else
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sprintf(variable, "&(%s%s)", prefix ? prefix : "", name);
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sprintf(offset, "%ld*sizeof(char)", varcharsize == 0 ? 1 : varcharsize);
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break;
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default:
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/*
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* we have to use the pointer except for arrays with given
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* bounds
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*/
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if (arrsize > 0)
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sprintf(variable, "(%s%s)", prefix ? prefix : "", name);
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else
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sprintf(variable, "&(%s%s)", prefix ? prefix : "", name);
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sprintf(offset, "sizeof(%s)", ECPGtype_name(typ));
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break;
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}
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if (arrsize < 0)
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arrsize = 1;
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if (siz == NULL)
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fprintf(o, "\n\t%s,%s,%ldL,%ldL,%s, ", get_type(typ), variable, varcharsize, arrsize, offset);
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else
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fprintf(o, "\n\t%s,%s,%ldL,%ldL,%s, ", get_type(typ), variable, varcharsize, arrsize, siz);
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free(variable);
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free(offset);
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}
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}
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/* Penetrate a struct and dump the contents. */
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static void
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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)
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{
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/*
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* If offset is NULL, then this is the first recursive level. If not
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* then we are in a struct in a struct and the offset is used as
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* offset.
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*/
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struct ECPGstruct_member *p,
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*ind_p = NULL;
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char obuf[BUFSIZ];
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char pbuf[BUFSIZ],
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ind_pbuf[BUFSIZ];
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const char *offset;
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if (offsetarg == NULL)
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{
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sprintf(obuf, "sizeof(%s)", name);
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offset = obuf;
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}
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else
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offset = offsetarg;
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sprintf(pbuf, "%s%s.", prefix ? prefix : "", name);
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prefix = pbuf;
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sprintf(ind_pbuf, "%s%s.", ind_prefix ? ind_prefix : "", ind_name);
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ind_prefix = ind_pbuf;
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if (ind_typ != NULL)
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ind_p = ind_typ->u.members;
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for (p = typ->u.members; p; p = p->next)
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{
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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);
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if (ind_p != NULL)
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ind_p = ind_p->next;
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}
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}
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void
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ECPGfree_struct_member(struct ECPGstruct_member * rm)
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{
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while (rm)
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{
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struct ECPGstruct_member *p = rm;
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rm = rm->next;
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free(p->name);
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free(p->typ);
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free(p);
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}
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}
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void
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ECPGfree_type(struct ECPGtype * typ)
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{
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if (!IS_SIMPLE_TYPE(typ->typ))
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{
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switch (typ->typ)
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{
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case ECPGt_array:
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switch (typ->u.element->typ)
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{
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case ECPGt_array:
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yyerror("internal error, found multi-dimensional array\n");
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break;
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case ECPGt_struct:
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case ECPGt_union:
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/* Array of structs. */
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ECPGfree_struct_member(typ->u.element->u.members);
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free(typ->u.element);
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break;
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default:
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if (!IS_SIMPLE_TYPE(typ->u.element->typ))
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yyerror("Internal error: unknown datatype, please inform pgsql-bugs@postgresql.org");
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free(typ->u.element);
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}
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break;
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case ECPGt_struct:
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case ECPGt_union:
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ECPGfree_struct_member(typ->u.members);
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break;
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default:
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sprintf(errortext, "illegal variable type %d\n", typ->typ);
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yyerror(errortext);
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break;
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}
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}
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free(typ);
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}
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const char *
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get_dtype(enum ECPGdtype typ)
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{
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switch (typ)
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{
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case ECPGd_count:
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return ("ECPGd_countr");
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break;
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case ECPGd_data:
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return ("ECPGd_data");
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break;
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case ECPGd_di_code:
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return ("ECPGd_di_code");
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break;
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case ECPGd_di_precision:
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return ("ECPGd_di_precision");
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break;
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case ECPGd_indicator:
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return ("ECPGd_indicator");
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break;
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case ECPGd_key_member:
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return ("ECPGd_key_member");
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break;
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case ECPGd_length:
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return ("ECPGd_length");
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break;
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case ECPGd_name:
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return ("ECPGd_name");
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break;
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case ECPGd_nullable:
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return ("ECPGd_nullable");
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break;
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case ECPGd_octet:
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return ("ECPGd_octet");
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break;
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case ECPGd_precision:
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return ("ECPGd_precision");
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break;
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case ECPGd_ret_length:
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return ("ECPGd_ret_length");
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case ECPGd_ret_octet:
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return ("ECPGd_ret_octet");
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break;
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case ECPGd_scale:
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return ("ECPGd_scale");
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break;
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case ECPGd_type:
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return ("ECPGd_type");
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break;
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case ECPGd_cardinality:
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return ("ECPGd_cardinality");
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default:
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sprintf(errortext, "illegal descriptor item %d\n", typ);
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yyerror(errortext);
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}
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return NULL;
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}
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