diff options
| -rw-r--r-- | miscutils/bc.c | 130 |
1 files changed, 76 insertions, 54 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c index c819dec..dd01f54 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -169,13 +169,14 @@ typedef enum BcStatus { BC_STATUS_SUCCESS, + BC_STATUS_FAILURE, // BC_STATUS_ALLOC_ERR, // BC_STATUS_INPUT_EOF, - BC_STATUS_BIN_FILE, +// BC_STATUS_BIN_FILE, // BC_STATUS_PATH_IS_DIR, - BC_STATUS_LEX_BAD_CHAR, +// BC_STATUS_LEX_BAD_CHAR, BC_STATUS_LEX_NO_STRING_END, BC_STATUS_LEX_NO_COMMENT_END, BC_STATUS_LEX_EOF, @@ -239,12 +240,13 @@ typedef enum BcStatus { // Keep enum above and messages below in sync! static const char *const bc_err_msgs[] = { NULL, + "", // "memory allocation error", // "I/O error", - "file is not text:", +// "file is not text:", // "path is a directory:", - "bad character", +// "bad character", "string end could not be found", "comment end could not be found", "end of file", @@ -321,8 +323,6 @@ typedef struct BcVec { #define bc_map_init(v) (bc_vec_init((v), sizeof(BcId), bc_id_free)) -#define BC_READ_BIN_CHAR(c) ((((c) < ' ' && !isspace((c))) || (c) > '~')) - typedef signed char BcDig; typedef struct BcNum { @@ -1138,6 +1138,18 @@ static void quit(void) exit(0); } +static int bc_error(const char *fmt, ...) +{ + va_list p; + + va_start(p, fmt); + bb_verror_msg(fmt, p, NULL); + va_end(p); + if (!G.ttyin) + exit(1); + return BC_STATUS_FAILURE; +} + static void bc_vec_grow(BcVec *v, size_t n) { size_t cap = v->cap * 2; @@ -1289,54 +1301,63 @@ static size_t bc_map_index(const BcVec *v, const void *ptr) static BcStatus bc_read_line(BcVec *vec, const char *prompt) { - int i; - signed char c; + bool bad_chars; - bc_vec_npop(vec, vec->len); + do { + int i; + char c; - fflush_and_check(); + bad_chars = 0; + bc_vec_npop(vec, vec->len); + + fflush_and_check(); #if ENABLE_FEATURE_BC_SIGNALS - if (bb_got_signal) { // ^C was pressed + if (bb_got_signal) { // ^C was pressed intr: - bb_got_signal = 0; // resets G_interrupt to zero - fputs(IS_BC - ? "\ninterrupt (type \"quit\" to exit)\n" - : "\ninterrupt (type \"q\" to exit)\n" - , stderr); - } + bb_got_signal = 0; // resets G_interrupt to zero + fputs(IS_BC + ? "\ninterrupt (type \"quit\" to exit)\n" + : "\ninterrupt (type \"q\" to exit)\n" + , stderr); + } #endif - if (G.ttyin && !G_posix) - fputs(prompt, stderr); - fflush_and_check(); + if (G.ttyin && !G_posix) + fputs(prompt, stderr); #if ENABLE_FEATURE_BC_SIGNALS - errno = 0; + errno = 0; #endif - do { - i = fgetc(stdin); - - if (i == EOF) { + do { + i = fgetc(stdin); + if (i == EOF) { #if ENABLE_FEATURE_BC_SIGNALS - // Both conditions appear simultaneously, check both just in case - if (errno == EINTR || bb_got_signal) { - // ^C was pressed - clearerr(stdin); - goto intr; - } + // Both conditions appear simultaneously, check both just in case + if (errno == EINTR || bb_got_signal) { + // ^C was pressed + clearerr(stdin); + goto intr; + } #endif - if (ferror(stdin)) - quit(); // this emits error message - G.eof = 1; - // Note: EOF does not append '\n', therefore: - // printf 'print 123\n' | bc - works - // printf 'print 123' | bc - fails (syntax error) - break; - } + if (ferror(stdin)) + quit(); // this emits error message + G.eof = 1; + // Note: EOF does not append '\n', therefore: + // printf 'print 123\n' | bc - works + // printf 'print 123' | bc - fails (syntax error) + break; + } - c = (signed char) i; - if (i > UCHAR_MAX || BC_READ_BIN_CHAR(c)) return BC_STATUS_BIN_FILE; - bc_vec_push(vec, &c); - } while (c != '\n'); + if ((i < ' ' && i != '\t' && i != '\r' && i != '\n') // also allow '\v' '\f'? + || i > 0x7e + ) { + // Bad chars on this line, ignore entire line + bc_error("illegal character 0x%02x", i); + bad_chars = 1; + } + c = (char) i; + bc_vec_push(vec, &c); + } while (i != '\n'); + } while (bad_chars); bc_vec_pushByte(vec, '\0'); @@ -1352,7 +1373,10 @@ static char* bc_read_file(const char *path) buf = xmalloc_open_read_close(path, &size); for (i = 0; i < size; ++i) { - if (BC_READ_BIN_CHAR(buf[i])) { + char c = buf[i]; + if ((c < ' ' && c != '\t' && c != '\r' && c != '\n') // also allow '\v' '\f'? + || c > 0x7e + ) { free(buf); buf = NULL; break; @@ -3162,7 +3186,7 @@ static BcStatus bc_lex_token(BcLex *l) } else { l->t.t = BC_LEX_INVALID; - s = BC_STATUS_LEX_BAD_CHAR; + s = bc_error("bad character '%c'", '&'); } break; @@ -3291,7 +3315,7 @@ static BcStatus bc_lex_token(BcLex *l) ++l->i; } else - s = BC_STATUS_LEX_BAD_CHAR; + s = bc_error("bad character '%c'", c); break; } @@ -3353,7 +3377,7 @@ static BcStatus bc_lex_token(BcLex *l) } else { l->t.t = BC_LEX_INVALID; - s = BC_STATUS_LEX_BAD_CHAR; + s = bc_error("bad character '%c'", c); } break; @@ -3362,7 +3386,7 @@ static BcStatus bc_lex_token(BcLex *l) default: { l->t.t = BC_LEX_INVALID; - s = BC_STATUS_LEX_BAD_CHAR; + s = bc_error("bad character '%c'", c); break; } } @@ -3473,7 +3497,7 @@ static BcStatus dc_lex_token(BcLex *l) else if (c2 == '>') l->t.t = BC_LEX_OP_REL_GE; else - return BC_STATUS_LEX_BAD_CHAR; + return bc_error("bad character '%c'", c); ++l->i; break; @@ -3490,7 +3514,7 @@ static BcStatus dc_lex_token(BcLex *l) if (isdigit(l->buf[l->i])) s = bc_lex_number(l, c); else - s = BC_STATUS_LEX_BAD_CHAR; + s = bc_error("bad character '%c'", c); break; } @@ -3524,7 +3548,7 @@ static BcStatus dc_lex_token(BcLex *l) default: { l->t.t = BC_LEX_INVALID; - s = BC_STATUS_LEX_BAD_CHAR; + s = bc_error("bad character '%c'", c); break; } } @@ -6938,7 +6962,7 @@ static BcStatus bc_vm_file(const char *file) G.prog.file = file; data = bc_read_file(file); - if (!data) return bc_vm_error(BC_STATUS_BIN_FILE, file, 0); + if (!data) return bc_error("file '%s' is not text", file); bc_lex_file(&G.prs.l, file); s = bc_vm_process(data); @@ -7021,8 +7045,6 @@ static BcStatus bc_vm_stdin(void) bc_vec_npop(&buffer, buffer.len); } - if (s == BC_STATUS_BIN_FILE) s = bc_vm_error(s, G.prs.l.f, 0); - if (str) s = bc_vm_error(BC_STATUS_LEX_NO_STRING_END, G.prs.l.f, G.prs.l.line); |