| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <assert.h> |
| |
| #include "asn1_ref.h" |
| |
| /* |
| * Construct a new empty reference. |
| */ |
| asn1p_ref_t * |
| asn1p_ref_new(int _lineno, struct asn1p_module_s *mod) { |
| asn1p_ref_t *ref; |
| |
| ref = calloc(1, sizeof *ref); |
| assert(ref); |
| asn1p_ref_set_source(ref, mod, _lineno); |
| |
| return ref; |
| } |
| |
| void |
| asn1p_ref_free(asn1p_ref_t *ref) { |
| if(ref) { |
| if(ref->components) { |
| size_t i = ref->comp_count; |
| while(i--) { |
| free(ref->components[i].name); |
| ref->components[i].name = 0; |
| } |
| free(ref->components); |
| ref->components = 0; |
| } |
| |
| free(ref); |
| } |
| } |
| |
| void |
| asn1p_ref_set_source(asn1p_ref_t *ref, struct asn1p_module_s *module, |
| int lineno) { |
| if(ref) { |
| ref->module = module; |
| ref->_lineno = lineno; |
| } |
| } |
| |
| static enum asn1p_ref_lex_type_e |
| asn1p_ref_name2lextype(const char *name) { |
| enum asn1p_ref_lex_type_e lex_type; |
| int has_lowercase = 0; |
| |
| if(*name == '&') { |
| if(name[1] >= 'A' && name[1] <= 'Z') { |
| lex_type = RLT_AmpUppercase; |
| } else { |
| lex_type = RLT_Amplowercase; |
| } |
| } else if(*name >= 'A' && *name <= 'Z') { |
| const char *p; |
| |
| for(p = name; *p; p++) { |
| if(*p >= 'a' && *p <= 'z') { |
| has_lowercase = 1; |
| break; |
| } |
| } |
| |
| if(has_lowercase) { |
| lex_type = RLT_Uppercase; |
| } else { |
| lex_type = RLT_CAPITALS; |
| } |
| } else if(*name == '@') { |
| if(name[1] == '.') |
| lex_type = RLT_AtDotlowercase; |
| else |
| lex_type = RLT_Atlowercase; |
| } else { |
| lex_type = RLT_lowercase; |
| } |
| |
| return lex_type; |
| } |
| |
| int |
| asn1p_ref_add_component(asn1p_ref_t *ref, const char *name, enum asn1p_ref_lex_type_e lex_type) { |
| |
| if(!ref || !name |
| || (int)lex_type < RLT_UNKNOWN || lex_type >= RLT_MAX) { |
| errno = EINVAL; |
| return -1; |
| } |
| |
| if(ref->comp_count == ref->comp_size) { |
| int newsize = ref->comp_size?(ref->comp_size<<2):4; |
| void *p = realloc(ref->components, |
| newsize * sizeof(ref->components[0])); |
| if(p) { |
| ref->components = p; |
| ref->comp_size = newsize; |
| } else { |
| return -1; |
| } |
| |
| } |
| |
| if(lex_type == RLT_UNKNOWN) { |
| lex_type = asn1p_ref_name2lextype(name); |
| } else { |
| assert(lex_type == asn1p_ref_name2lextype(name)); |
| } |
| |
| ref->components[ref->comp_count].name = strdup(name); |
| ref->components[ref->comp_count].lex_type = lex_type; |
| if(ref->components[ref->comp_count].name) { |
| ref->comp_count++; |
| return 0; |
| } else { |
| return -1; |
| } |
| } |
| |
| asn1p_ref_t * |
| asn1p_ref_clone(asn1p_ref_t *ref) { |
| asn1p_ref_t *newref; |
| |
| newref = asn1p_ref_new(ref->_lineno, ref->module); |
| if(newref) { |
| for(size_t i = 0; i < ref->comp_count; i++) { |
| if(asn1p_ref_add_component(newref, |
| ref->components[i].name, |
| ref->components[i].lex_type |
| )) { |
| asn1p_ref_free(newref); |
| newref = NULL; |
| break; |
| } |
| } |
| } |
| |
| return newref; |
| } |
| |
| int |
| asn1p_ref_compare(const asn1p_ref_t *a, const asn1p_ref_t *b) { |
| if(a->comp_count != b->comp_count) |
| return -1; |
| if(a->module != b->module) |
| return -1; |
| |
| for(size_t i = 0; i < a->comp_count; i++) { |
| if(a->components[i].lex_type != b->components[i].lex_type |
| || strcmp(a->components[i].name, b->components[i].name) != 0) { |
| return -1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| const char * |
| asn1p_ref_string(const asn1p_ref_t *ref) { |
| static char static_buf[32]; |
| static char *buf = static_buf; |
| static size_t buf_size = sizeof(static_buf); |
| char *p = buf; |
| |
| if(!ref) return "<no-ref>"; |
| |
| for(size_t i = 0; i < ref->comp_count; i++) { |
| size_t space = buf_size - (p - buf); |
| int ret = |
| snprintf(p, space, "%s%s", i ? "." : "", ref->components[i].name); |
| if(ret < 0 || (size_t)ret >= space) { |
| i--; |
| char *tmp = malloc(buf_size * 2 + 1); |
| assert(tmp); |
| size_t p_offset = p - buf; |
| memcpy(tmp, buf, (p - buf)); |
| if(buf != static_buf) free(buf); |
| buf_size *= 2; |
| buf = tmp; |
| p = tmp + p_offset; |
| } else { |
| p += ret; |
| } |
| } |
| |
| *p = '\0'; |
| return buf; |
| } |
| |