X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=progs%2Ftabs.c;h=01325c329cb986e1101eb1110c4f1828380b8315;hp=7588e8b2f0f5821b0f58ca4d3e13f0c28c9a0874;hb=88e7914acafc37f84af25b80f403eb4290e423d4;hpb=412da50547b9612cc8e759c533fe256198ec2dd3 diff --git a/progs/tabs.c b/progs/tabs.c index 7588e8b2..01325c32 100644 --- a/progs/tabs.c +++ b/progs/tabs.c @@ -1,5 +1,5 @@ /**************************************************************************** - * Copyright (c) 2008 Free Software Foundation, Inc. * + * Copyright (c) 2008-2016,2017 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * @@ -36,13 +36,22 @@ #define USE_LIBTINFO #include +#include -MODULE_ID("$Id: tabs.c,v 1.11 2008/11/16 00:58:24 tom Exp $") +MODULE_ID("$Id: tabs.c,v 1.41 2017/10/12 22:42:08 tom Exp $") static void usage(void) GCC_NORETURN; +const char *_nc_progname; static int max_cols; +static void +failed(const char *s) +{ + perror(s); + ExitProgram(EXIT_FAILURE); +} + static int putch(int c) { @@ -71,7 +80,7 @@ do_tabs(int *tab_list) break; } } - putchar('\n'); + putchar('\r'); } static int * @@ -83,15 +92,22 @@ decode_tabs(const char *tab_list) int prior = 0; int ch; + if (result == 0) + failed("decode_tabs"); + while ((ch = *tab_list++) != '\0') { if (isdigit(UChar(ch))) { value *= 10; value += (ch - '0'); } else if (ch == ',') { result[n] = value + prior; - if (n > 0 && value <= result[n - 1]) { - fprintf(stderr, "tab-stops are not in increasing order\n"); - ExitProgram(EXIT_FAILURE); + if (n > 0 && result[n] <= result[n - 1]) { + fprintf(stderr, + "%s: tab-stops are not in increasing order: %d %d\n", + _nc_progname, value, result[n - 1]); + free(result); + result = 0; + break; } ++n; value = 0; @@ -102,22 +118,26 @@ decode_tabs(const char *tab_list) } } - /* - * If there is only one value, then it is an option such as "-8". - */ - if ((n == 0) && (value > 0)) { - int step = value; - while (n < max_cols - 1) { - result[n++] = value; - value += step; + if (result != 0) { + /* + * If there is only one value, then it is an option such as "-8". + */ + if ((n == 0) && (value > 0)) { + int step = value; + value = 1; + while (n < max_cols - 1) { + result[n++] = value; + value += step; + } } + + /* + * Add the last value, if any. + */ + result[n++] = value + prior; + result[n] = 0; } - /* - * Add the last value, if any. - */ - result[n++] = value; - result[n] = 0; return result; } @@ -132,10 +152,11 @@ print_ruler(int *tab_list) for (n = 0; n < max_cols; n += 10) { int ch = 1 + (n / 10); char buffer[20]; - sprintf(buffer, "----+----%c", - ((ch < 10) - ? (ch + '0') - : (ch + 'A' - 10))); + _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) + "----+----%c", + ((ch < 10) + ? (ch + '0') + : (ch + 'A' - 10))); printf("%.*s", ((max_cols - n) > 10) ? 10 : (max_cols - n), buffer); } putchar('\n'); @@ -180,52 +201,193 @@ write_tabs(int *tab_list) putchar('\n'); } +/* + * Trim leading/trailing blanks, as well as blanks after a comma. + * Convert embedded blanks to commas. + */ +static char * +trimmed_tab_list(const char *source) +{ + char *result = strdup(source); + int ch, j, k, last; + + if (result != 0) { + for (j = k = last = 0; result[j] != 0; ++j) { + ch = UChar(result[j]); + if (isspace(ch)) { + if (last == '\0') { + continue; + } else if (isdigit(last) || last == ',') { + ch = ','; + } + } else if (ch == ',') { + ; + } else { + if (last == ',') + result[k++] = (char) last; + result[k++] = (char) ch; + } + last = ch; + } + result[k] = '\0'; + } + return result; +} + +static bool +comma_is_needed(const char *source) +{ + bool result = FALSE; + + if (source != 0) { + size_t len = strlen(source); + if (len != 0) + result = (source[len - 1] != ','); + } else { + result = FALSE; + } + return result; +} + +/* + * Add a command-line parameter to the tab-list. It can be blank- or comma- + * separated (or a mixture). For simplicity, empty tabs are ignored, e.g., + * tabs 1,,6,11 + * tabs 1,6,11 + * are treated the same. + */ +static const char * +add_to_tab_list(char **append, const char *value) +{ + char *result = *append; + char *copied = trimmed_tab_list(value); + + if (copied != 0 && *copied != '\0') { + const char *comma = ","; + size_t need = 1 + strlen(copied); + + if (*copied == ',') + comma = ""; + else if (!comma_is_needed(*append)) + comma = ""; + + need += strlen(comma); + if (*append != 0) + need += strlen(*append); + + result = malloc(need); + if (result == 0) + failed("add_to_tab_list"); + + *result = '\0'; + if (*append != 0) { + _nc_STRCPY(result, *append, need); + free(*append); + } + _nc_STRCAT(result, comma, need); + _nc_STRCAT(result, copied, need); + + *append = result; + } + free(copied); + return result; +} + +/* + * Check for illegal characters in the tab-list. + */ +static bool +legal_tab_list(const char *tab_list) +{ + bool result = TRUE; + + if (tab_list != 0 && *tab_list != '\0') { + if (comma_is_needed(tab_list)) { + int n, ch; + for (n = 0; tab_list[n] != '\0'; ++n) { + ch = UChar(tab_list[n]); + if (!(isdigit(ch) || ch == ',' || ch == '+')) { + fprintf(stderr, + "%s: unexpected character found '%c'\n", + _nc_progname, ch); + result = FALSE; + break; + } + } + } else { + fprintf(stderr, "%s: trailing comma found '%s'\n", _nc_progname, tab_list); + result = FALSE; + } + } else { + fprintf(stderr, "%s: no tab-list given\n", _nc_progname); + result = FALSE; + } + return result; +} + +static char * +skip_list(char *value) +{ + while (*value != '\0' && + (isdigit(UChar(*value)) || + isspace(UChar(*value)) || + strchr("+,", UChar(*value)) != 0)) { + ++value; + } + return value; +} + static void usage(void) { - static const char *msg[] = +#define DATA(s) s "\n" + static const char msg[] = { - "Usage: tabs [options] [tabstop-list]" - ,"" - ,"Options:" - ," -0 reset tabs" - ," -8 set tabs to standard interval" - ," -a Assembler, IBM S/370, first format" - ," -a2 Assembler, IBM S/370, second format" - ," -c COBOL, normal format" - ," -c2 COBOL compact format" - ," -c3 COBOL compact format extended" - ," -d debug (show ruler with expected/actual tab positions)" - ," -f FORTRAN" - ," -n no-op (do not modify terminal settings)" - ," -p PL/I" - ," -s SNOBOL" - ," -u UNIVAC 1100 Assembler" - ," -T name use terminal type 'name'" - ,"" - ,"A tabstop-list is an ordered list of column numbers, e.g., 1,11,21" - ,"or 1,+10,+10 which is the same." + DATA("Usage: tabs [options] [tabstop-list]") + DATA("") + DATA("Options:") + DATA(" -0 reset tabs") + DATA(" -8 set tabs to standard interval") + DATA(" -a Assembler, IBM S/370, first format") + DATA(" -a2 Assembler, IBM S/370, second format") + DATA(" -c COBOL, normal format") + DATA(" -c2 COBOL compact format") + DATA(" -c3 COBOL compact format extended") + DATA(" -d debug (show ruler with expected/actual tab positions)") + DATA(" -f FORTRAN") + DATA(" -n no-op (do not modify terminal settings)") + DATA(" -p PL/I") + DATA(" -s SNOBOL") + DATA(" -u UNIVAC 1100 Assembler") + DATA(" -T name use terminal type 'name'") + DATA(" -V print version") + DATA("") + DATA("A tabstop-list is an ordered list of column numbers, e.g., 1,11,21") + DATA("or 1,+10,+10 which is the same.") }; - unsigned n; +#undef DATA fflush(stdout); - for (n = 0; n < SIZEOF(msg); ++n) { - fprintf(stderr, "%s\n", msg[n]); - } + fputs(msg, stderr); ExitProgram(EXIT_FAILURE); } int main(int argc, char *argv[]) { - int rc = EXIT_SUCCESS; + int rc = EXIT_FAILURE; bool debug = FALSE; bool no_op = FALSE; int n, ch; NCURSES_CONST char *term_name = 0; - const char *mar_list = 0; /* ignored */ char *append = 0; const char *tab_list = 0; + TTY tty_settings; + int fd; + + _nc_progname = _nc_rootname(argv[0]); + + fd = save_tty_settings(&tty_settings, FALSE); if ((term_name = getenv("TERM")) == 0) term_name = "ansi+tabs"; @@ -238,23 +400,25 @@ main(int argc, char *argv[]) while ((ch = *++option) != '\0') { switch (ch) { case 'a': - switch (*option) { + switch (*++option) { + default: case '\0': tab_list = "1,10,16,36,72"; + option--; /* Assembler, IBM S/370, first format */ break; case '2': tab_list = "1,10,16,40,72"; /* Assembler, IBM S/370, second format */ break; - default: - usage(); } break; case 'c': - switch (*option) { + switch (*++option) { + default: case '\0': tab_list = "1,8,12,16,20,55"; + option--; /* COBOL, normal format */ break; case '2': @@ -265,8 +429,6 @@ main(int argc, char *argv[]) tab_list = "1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67"; /* COBOL compact format extended */ break; - default: - usage(); } break; case 'd': /* ncurses extension */ @@ -296,18 +458,23 @@ main(int argc, char *argv[]) if (*++option != '\0') { term_name = option; } else { - term_name = argv[n++]; + term_name = argv[n]; + option--; } option += ((int) strlen(option)) - 1; continue; + case 'V': + puts(curses_version()); + ExitProgram(EXIT_SUCCESS); default: if (isdigit(UChar(*option))) { - tab_list = option; - ++n; + char *copy = strdup(option); + *skip_list(copy) = '\0'; + tab_list = copy; + option = skip_list(option) - 1; } else { usage(); } - option += ((int) strlen(option)) - 1; break; } } @@ -316,52 +483,47 @@ main(int argc, char *argv[]) while ((ch = *++option) != '\0') { switch (ch) { case 'm': - mar_list = option; + /* + * The "+mXXX" option is unimplemented because only the long-obsolete + * att510d implements smgl, which is needed to support + * this option. + */ break; default: - usage(); + /* special case of relative stops separated by spaces? */ + if (option == argv[n] + 1) { + tab_list = add_to_tab_list(&append, argv[n]); + } + break; } } break; default: - if (isdigit(*option)) { - if (append != 0) { - if (tab_list != (const char *) append) { - /* one of the predefined options was used */ - append = strdup(option); - tab_list = append; - } else { - append = malloc(strlen(tab_list) + strlen(option) + 2); - sprintf(append, "%s,%s", tab_list, option); - free((char *) tab_list); - tab_list = append; - } - } else { - append = strdup(option); - tab_list = append; + if (append != 0) { + if (tab_list != (const char *) append) { + /* one of the predefined options was used */ + free(append); + append = 0; } - } else { - usage(); } + tab_list = add_to_tab_list(&append, option); break; } } - setupterm(term_name, STDOUT_FILENO, (int *) 0); + setupterm(term_name, fd, (int *) 0); max_cols = (columns > 0) ? columns : 80; if (!VALID_STRING(clear_all_tabs)) { fprintf(stderr, "%s: terminal type '%s' cannot reset tabs\n", - argv[0], term_name); - rc = EXIT_FAILURE; + _nc_progname, term_name); } else if (!VALID_STRING(set_tab)) { fprintf(stderr, "%s: terminal type '%s' cannot set tabs\n", - argv[0], term_name); - rc = EXIT_FAILURE; - } else { + _nc_progname, term_name); + } else if (legal_tab_list(tab_list)) { int *list = decode_tabs(tab_list); if (!no_op) @@ -371,13 +533,19 @@ main(int argc, char *argv[]) if (!no_op) do_tabs(list); if (debug) { + fflush(stderr); + printf("tabs %s\n", tab_list); print_ruler(list); write_tabs(list); } free(list); + } else if (debug) { + fflush(stderr); + printf("tabs %s\n", tab_list); } + rc = EXIT_SUCCESS; } - if (append) + if (append != 0) free(append); ExitProgram(rc); }