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- /* Copyright Yann Weber <asmsh@yannweb.net>
- This file is part of asmsh.
-
- asmsh is free software: you can redistribute it and/or modify it under the
- terms of the GNU General Public License as published by the Free Software
- Foundation, either version 3 of the License, or any later version.
-
- asmsh is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
- details.
-
- You should have received a copy of the GNU General Public License along
- with asmsh. If not, see <https://www.gnu.org/licenses/>.
- */
- #include "shell_sym.h"
-
-
- int asmsh_symtable_init(asmsh_symtable_t *table, short freeval)
- {
- int err;
- table->freeval = freeval?1:0;
- table->alloc = ASMSH_SYMALLOC;
- table->syms = malloc(table->alloc*sizeof(*table->syms));
- if(!table->syms)
- {
- err = errno;
- goto err;
- }
- bzero(table->syms, table->alloc*sizeof(*table->syms));
- table->syms_sz = 0;
- return 0;
- err:
- bzero(table, sizeof(*table));
- errno=err;
- return -1;
- }
-
-
- void asmsh_symtable_clean(asmsh_symtable_t *table)
- {
- if(table->freeval)
- {
- for(int i=0; i<table->syms_sz; i++)
- {
- free(table->syms[i].val);
- }
- }
- free(table->syms);
- bzero(table, sizeof(*table));
- }
-
-
- int asmsh_symtable_add(asmsh_symtable_t *table, const char *name, void *val)
- {
- int i;
- if(strlen(name)>ASMSH_VARNAME_MAX)
- {
- errno=EINVAL;
- return -1;
- }
- if(table->syms_sz >= table->alloc-1)
- {
- table->alloc += ASMSH_SYMALLOC;
- void *tmp = realloc(table->syms, sizeof(*table->syms)*table->alloc);
- if(!tmp)
- {
- return -1;
- }
- table->syms = tmp;
- }
- for(i=0; i<table->syms_sz; i++)
- {
- int cmp = strcmp(name, table->syms[i].name);
- if(cmp == 0)
- {
- //update value
- if(table->freeval)
- {
- free(table->syms[i].val);
- }
- table->syms[i].val = val;
- return 0;
- }
- else if(cmp > 0)
- {
- break;
- }
- }
- if(i<table->syms_sz)
- {
- memmove(&table->syms[i+1], &table->syms[i],
- sizeof(*table->syms)*(table->syms_sz - i));
- }
-
- strncpy(table->syms[i].name, name, ASMSH_VARNAME_MAX);
- table->syms[i].name[ASMSH_VARNAME_MAX] = '\0';
- table->syms[i].val = val;
- table->syms_sz++;
- return 0;
- }
-
-
- int asmsh_symtable_del(asmsh_symtable_t *table, const char *name)
- {
- if(strlen(name) > ASMSH_VARNAME_MAX)
- {
- return 0;
- }
- int i=0;
- for(i=0; i<table->syms_sz; i++)
- {
- int cmp = strncmp(name, table->syms[i].name, ASMSH_VARNAME_MAX);
- if(!cmp) { break; }
- }
- if(i==table->syms_sz)
- {
- return 0; // not found
- }
- if(table->freeval) { free(table->syms[i].val); }
- if(table->syms_sz > i+1)
- {
- memmove(&table->syms[i], &table->syms[i+1],
- sizeof(*table->syms)*(table->syms_sz - (i+1)));
- if((table->alloc - table->syms_sz) > ASMSH_SYMALLOC*2)
- {
- table->alloc -= ASMSH_SYMALLOC;
- void *tmp = realloc(table->syms,
- sizeof(*table->syms)*table->alloc);
- if(!tmp)
- {
- return 0; // :/
- }
- table->syms = tmp;
- }
- }
- table->syms_sz--;
- return 1; // 1 deleted
- }
-
-
- const asmsh_sym_t *asmsh_symtable_get(asmsh_symtable_t *table, const char *name)
- {
- if(strlen(name) > ASMSH_VARNAME_MAX)
- {
- return NULL;
- }
- for(int i=0; i<table->syms_sz; i++)
- {
- int cmp = strcmp(name, table->syms[i].name);
- if(!cmp)
- {
- return &(table->syms[i]);
- }
- if(cmp > 0) { break; }
- }
- return NULL;
- }
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