/* bufferop.c: Function operators for buffer manipulation. */ #include "x.tab.h" #include "execute.h" #include "ident.h" void op_buffer_len(void) { Data *args; int len; if (!func_init_1(&args, BUFFER)) return; len = buffer_len(args[0].u.buffer); pop(1); push_int(len); } void op_buffer_retrieve(void) { Data *args; int c, pos; if (!func_init_2(&args, BUFFER, INTEGER)) return; pos = args[1].u.val - 1; if (pos < 0) { throw(range_id, "Position (%d) is less than one.", pos + 1); } else if (pos >= buffer_len(args[0].u.buffer)) { throw(range_id, "Position (%d) is greater than buffer length (%d).", pos + 1, buffer_len(args[0].u.buffer)); } else { c = buffer_retrieve(args[0].u.buffer, pos); pop(2); push_int(c); } } void op_buffer_append(void) { Data *args; if (!func_init_2(&args, BUFFER, BUFFER)) return; args[0].u.buffer = buffer_append(args[0].u.buffer, args[1].u.buffer); pop(1); } void op_buffer_replace(void) { Data *args; int pos; if (!func_init_3(&args, BUFFER, INTEGER, INTEGER)) return; pos = args[1].u.val - 1; if (pos < 0) { throw(range_id, "Position (%d) is less than one.", pos + 1); return; } else if (pos >= buffer_len(args[0].u.buffer)) { throw(range_id, "Position (%d) is greater than buffer length (%d).", pos + 1, buffer_len(args[0].u.buffer)); return; } args[0].u.buffer = buffer_replace(args[0].u.buffer, pos, args[1].u.val); pop(2); } void op_buffer_add(void) { Data *args; if (!func_init_2(&args, BUFFER, INTEGER)) return; args[0].u.buffer = buffer_add(args[0].u.buffer, args[1].u.val); pop(1); } void op_buffer_truncate(void) { Data *args; int pos; if (!func_init_2(&args, BUFFER, INTEGER)) return; pos = args[1].u.val; if (pos < 0) { throw(range_id, "Position (%d) is less than zero.", pos); return; } else if (pos > buffer_len(args[0].u.buffer)) { throw(range_id, "Position (%d) is greater than buffer length (%d).", pos, buffer_len(args[0].u.buffer)); return; } args[0].u.buffer = buffer_truncate(args[0].u.buffer, pos); pop(1); } void op_buffer_to_strings(void) { Data *args; int num_args; List *list; Buffer *sep; if (!func_init_1_or_2(&args, &num_args, BUFFER, BUFFER)) return; sep = (num_args == 2) ? args[1].u.buffer : NULL; list = buffer_to_strings(args[0].u.buffer, sep); pop(num_args); push_list(list); list_discard(list); } void op_buffer_from_strings(void) { Data *args, *base; int num_args, i; Buffer *buf, *sep; if (!func_init_1_or_2(&args, &num_args, LIST, BUFFER)) return; sep = (num_args == 2) ? args[1].u.buffer : NULL; base = data_dptr(&args[0]); for (i = 0; i < args[0].u.substr.span; i++) { if (base[i].type != STRING) { throw(type_id, "List element %d (%D) not a string.", i + 1, &base[i]); return; } } buf = buffer_from_strings(base, args[0].u.substr.span, sep); pop(num_args); push_buffer(buf); buffer_discard(buf); }