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/* GNUPLOT - misc.c */

/*[

* Permission to use, copy, and distribute this software and its

* documentation for any purpose with or without fee is hereby granted,

* provided that the above copyright notice appear in all copies and

* that both that copyright notice and this permission notice appear

* in supporting documentation.

* Permission to modify the software is granted, but not the right to

* distribute the complete modified source code. Modifications are to

* be distributed as patches to the released version. Permission to

* distribute binaries produced by compiling modified sources is granted,

* provided you

* 1. distribute the corresponding source modifications from the

* released version in the form of a patch file along with the binaries,

* 2. add special version identification to distinguish your version

* in addition to the base release version number,

* 3. provide your name and address as the primary contact for the

* support of your modified version, and

* 4. retain our contact information in regard to use of the base

* software.

* Permission to distribute the released version of the source code along

* with corresponding source modifications in the form of a patch file is

* granted with same provisions 2 through 4 for binary distributions.

* This software is provided "as is" without express or implied warranty

* to the extent permitted by applicable law.

]*/

#include "misc.h"

#include "alloc.h"

#include "command.h"

#include "datablock.h"

#include "encoding.h"

#include "graphics.h"

#include "loadpath.h"

#include "plot.h"

#include "tables.h"

#include "util.h"

#include "scanner.h" /* so that scanner() can count curly braces */

#include "setshow.h"

#ifdef _WIN32

# include <fcntl.h>

# if defined(__WATCOMC__) || defined(_MSC_VER)

# include <io.h> /* for setmode() */

# endif

#endif

static void prepare_call(int calltype, udvt_entry *functionblock);

static void lf_exit_scope(int depth);

/* State information for load_file(), to recover from errors

* and properly handle recursive load_file calls

LFS *lf_head = NULL; /* NULL if not in load_file */

/* these are global so that plot.c can load them for the -c option */

int call_argc;

char *call_args[10] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };

static char *argname[] = {"ARG0","ARG1","ARG2","ARG3","ARG4","ARG5","ARG6","ARG7","ARG8","ARG9"};

/* Used to report failure on file open */

static char *failed_file_name = NULL;

/* Used by postscript terminal if a font file is found by loadpath_fopen() */

char *loadpath_fontname = NULL;

static void

prepare_call(int calltype, udvt_entry *functionblock)

{

struct udvt_entry *udv;

struct value *ARGV;

int argindex;

int argv_size;

/* call_args[] will hold arguments as strings.

* argval[] will be a private copy of numeric arguments as udvs.

* Later we will fill ARGV[] from one or the other.

struct value argval[9];

for (argindex = 0; argindex < 9; argindex++)

argval[argindex].type = NOTDEFINED;

if (calltype == 2 || calltype == 7) {

call_argc = 0;

while (!END_OF_COMMAND && call_argc < 9) {

call_args[call_argc] = try_to_get_string();

if (!call_args[call_argc]) {

int save_token = c_token;

/* This catches call "file" STRINGVAR (expression) */

if (type_udv(c_token) == STRING) {

call_args[call_argc] = gp_strdup(add_udv(c_token)->udv_value.v.string_val);

c_token++;

/* Evaluate a parenthesized expression or a bare numeric user variable

* and store the result in a string

} else if (equals(c_token, "(")

|| (type_udv(c_token) == INTGR || type_udv(c_token) == CMPLX)) {

char val_as_string[32];

struct value a;

const_express(&a);

argval[call_argc] = a;

switch(a.type) {

case CMPLX: /* FIXME: More precision? Some way to provide a format? */

sprintf(val_as_string, "%g", a.v.cmplx_val.real);

call_args[call_argc] = gp_strdup(val_as_string);

break;

default:

int_error(save_token, "Unrecognized argument type");

break;

case INTGR:

sprintf(val_as_string, PLD, a.v.int_val);

call_args[call_argc] = gp_strdup(val_as_string);

break;

}

/* Old (pre version 5) style wrapping of bare tokens as strings

* is still used for storing numerical constants ARGn but not ARGV[n]

} else {

double temp;

char *endptr;

m_capture(&call_args[call_argc], c_token, c_token);

c_token++;

temp = strtod(call_args[call_argc], &endptr);

if (endptr != call_args[call_argc] && *endptr == '\0')

Gcomplex(&argval[call_argc], temp, 0.0);

}

call_argc++;

}

lf_head->c_token = c_token;

if (!END_OF_COMMAND)

int_error(++c_token, "too many arguments for 'call <file>'");

} else if (calltype == 5) {

/* lf_push() moved our call arguments from call_args[] to lf->call_args[] */

/* call_argc was determined at program entry */

for (argindex = 0; argindex < 10; argindex++) {

call_args[argindex] = lf_head->call_args[argindex];

lf_head->call_args[argindex] = NULL; /* just to be safe */

}

#ifdef USE_FUNCTIONBLOCKS

} else if (calltype == 8) {

/* $functionblock(arg1, ...) */

cache_at(&lf_head->shadow_at, &lf_head->shadow_at_size);

memcpy(argval, eval_parameters, sizeof(argval));

call_argc = 0;

while ((call_argc < 9) && (argval[call_argc].type != NOTDEFINED)) {

/* Execute the equivalent of local paramN = ARGV[N] */

if (functionblock->udv_value.v.functionblock.parnames) {

char *name = functionblock->udv_value.v.functionblock.parnames[call_argc];

if (name) {

struct udvt_entry *udv = add_udv_by_name(name);

shadow_one_variable(udv);

udv->udv_value = eval_parameters[call_argc];

if (udv->udv_value.type == STRING)

udv->udv_value.v.string_val = strdup(udv->udv_value.v.string_val);

if (udv->udv_value.type == ARRAY) {

/* local arrays are freed only by lf_exit_scope() */

make_array_permanent(&(udv->udv_value));

udv->udv_value.v.value_array[0].type = LOCAL_ARRAY;

}

lf_head->local_variables = TRUE;

}

call_argc++;

}

if ((call_argc < 9)

&& (functionblock->udv_value.v.functionblock.parnames != NULL)

&& (functionblock->udv_value.v.functionblock.parnames[call_argc] != NULL))

int_warn(c_token-1, "Not enough parameters for %s", lf_head->name);

if (evaluate_inside_functionblock == 0) {

evaluate_inside_functionblock = lf_head->depth + 1;

FPRINTF((stderr, "setting flag evaluate_inside_functionblock to %d\n",

lf_head->depth + 1));

}

#endif

} else {

/* "load" command has no arguments */

call_argc = 0;

}

/* Old-style "call" arguments were referenced as $0 ... $9 and $#.

* New-style has ARG0 = script-name, ARG1 ... ARG9 and ARGC

* Version 5.3 adds ARGV[n]

udv = add_udv_by_name("ARGC");

Ginteger(&(udv->udv_value), call_argc);

udv = add_udv_by_name("ARGV");

argv_size = GPMIN(call_argc, 9);

init_array(udv, argv_size);

ARGV = udv->udv_value.v.value_array;

#ifdef USE_FUNCTIONBLOCKS

if (calltype == 8) {

for (argindex = 1; argindex <= argv_size; argindex++)

ARGV[argindex] = argval[argindex-1];

return;

}

#endif

udv = add_udv_by_name("ARG0");

gpfree_string(&(udv->udv_value));

Gstring(&(udv->udv_value), gp_strdup(lf_head->name));

for (argindex = 1; argindex <= 9; argindex++) {

char *argstring = call_args[argindex-1];

udv = add_udv_by_name(argname[argindex]);

gpfree_string(&(udv->udv_value));

Gstring(&(udv->udv_value), argstring ? gp_strdup(argstring) : gp_strdup(""));

if (argindex > argv_size)

continue;

if (argval[argindex-1].type == NOTDEFINED)

Gstring(&ARGV[argindex], gp_strdup(udv->udv_value.v.string_val));

else

ARGV[argindex] = argval[argindex-1];

}

* calltype indicates whether load_file() is called from

* (1) the "load" command, no arguments substitution is done

* (2) the "call" command, arguments are substituted for $0, $1, etc.

* (3) on program entry to load initialization files (acts like "load")

* (4) to execute script files given on the command line (acts like "load")

* (5) to execute a single script file given with -c (acts like "call")

* (6) "load $datablock"

* (7) "call $datablock"

* (8) execute commands in function block (called from f_eval)

void

load_file(FILE *fp, char *name, int calltype)

{

int len;

int start, left;

int more;

int stop = FALSE;

udvt_entry *gpval_lineno = NULL;

char **datablock_input_line = NULL;

udvt_entry *functionblock = NULL;

/* Support for "load $datablock" */

if (calltype == 6 || calltype == 7)

datablock_input_line = get_datablock(name);

#ifdef USE_FUNCTIONBLOCKS

/* Support for function blocks */

if (calltype == 8) {

functionblock = (udvt_entry *)(name);

datablock_input_line = functionblock->udv_value.v.functionblock.data_array;

name = strdup(functionblock->udv_name);

}

#endif

if (!fp && !datablock_input_line) {

failed_file_name = name;

int_error(NO_CARET, "Cannot load input from '%s'", failed_file_name);

}

/* Provide a user-visible copy of the current line number in the input file */

gpval_lineno = add_udv_by_name("GPVAL_LINENO");

Ginteger(&gpval_lineno->udv_value, 0);

lf_push(fp, name, NULL); /* save state for errors and recursion */

if (fp == stdin) {

/* DBT 10-6-98 go interactive if "-" named as load file */

interactive = TRUE;

while (!com_line());

(void) lf_pop();

return;

}

/* We actually will read from a file */

prepare_call(calltype, functionblock);

/* things to do after lf_push */

inline_num = 0;

/* go into non-interactive mode during load */

/* will be undone below, or in reset_load_stack_after_error */

interactive = FALSE;

while (!stop) { /* read all lines in file */

left = gp_input_line_len;

start = 0;

more = TRUE;

/* read one logical line */

while (more) {

if (fp && fgets(&(gp_input_line[start]), left, fp) == (char *) NULL) {

/* EOF in input file */

stop = TRUE;

gp_input_line[start] = '\0';

more = FALSE;

} else if (!fp && datablock_input_line && (*datablock_input_line == NULL)) {

/* End of input datablock */

stop = TRUE;

gp_input_line[start] = '\0';

more = FALSE;

} else {

/* Either we successfully read a line from input file fp

* or we are about to copy a line from a datablock.

* Either way we have to process line-ending '\' as a

* continuation request.

if (!fp && datablock_input_line) {

strncpy(&(gp_input_line[start]), *datablock_input_line, left);

datablock_input_line++;

}

inline_num++;

gpval_lineno->udv_value.v.int_val = inline_num; /* User visible copy */

if ((len = strlen(gp_input_line)) == 0)

continue;

--len;

if (gp_input_line[len] == '\n') { /* remove any newline */

gp_input_line[len] = '\0';

/* Look, len was 1-1 = 0 before, take care here! */

if (len > 0)

--len;

if (gp_input_line[len] == '\r') { /* remove any carriage return */

gp_input_line[len] = NUL;

if (len > 0)

--len;

}

} else if (len + 2 >= left) {

extend_input_line();

left = gp_input_line_len - len - 1;

start = len + 1;

continue; /* don't check for '\' */

}

if (gp_input_line[len] == '\\') {

/* line continuation */

start = len;

left = gp_input_line_len - start;

} else {

/* EAM May 2011 - handle multi-line bracketed clauses {...}.

* Introduces a requirement for scanner.c and scanner.h

* This code is redundant with part of do_line(),

* but do_line() assumes continuation lines come from stdin.

/* macros in a clause are problematic, as they are */

/* only expanded once even if the clause is replayed */

string_expand_macros();

/* Strip off trailing comment and count curly braces */

num_tokens = scanner(&gp_input_line, &gp_input_line_len);

if (gp_input_line[token[num_tokens].start_index] == '#') {

gp_input_line[token[num_tokens].start_index] = NUL;

start = token[num_tokens].start_index;

left = gp_input_line_len - start;

}

/* Read additional lines if necessary to complete a

* bracketed clause {...}

if (curly_brace_count < 0)

int_error(NO_CARET, "Unexpected }");

if (curly_brace_count > 0) {

if ((len + 4) > gp_input_line_len)

extend_input_line();

strcat(gp_input_line,";\n");

start = strlen(gp_input_line);

left = gp_input_line_len - start;

continue;

}

more = FALSE;

}

/* If we hit a 'break' or 'continue' statement in the lines just processed */

if (iteration_early_exit())

continue;

/* process line */

if (strlen(gp_input_line) > 0) {

screen_ok = FALSE; /* make sure command line is echoed on error */

if (do_line())

stop = TRUE;

}

/* pop state */

(void) lf_pop(); /* also closes file fp */

}

/* pop from load_file state stack

FALSE if stack was empty

called by load_file and reset_load_stack_after_error

TBOOLEAN

lf_pop()

{

LFS *lf;

int argindex;

struct udvt_entry *udv;

if (lf_head == NULL)

return (FALSE);

lf = lf_head;

if (lf->fp == NULL || lf->fp == stdin)

/* Do not close stdin in the case that "-" is named as a load file */

;

#if defined(PIPES)

else if (lf->name != NULL && lf->name[0] == '<')

pclose(lf->fp);

#endif

else

fclose(lf->fp);

/* call arguments are not relevant when invoked from do_string_and_free */

if (lf->cmdline == NULL) {

for (argindex = 0; argindex < 10; argindex++) {

if (call_args[argindex])

free(call_args[argindex]);

call_args[argindex] = lf->call_args[argindex];

}

call_argc = lf->call_argc;

/* Restore ARGC and ARG0 ... ARG9 */

if ((udv = get_udv_by_name("ARGC"))) {

Ginteger(&(udv->udv_value), call_argc);

}

if ((udv = get_udv_by_name("ARG0"))) {

gpfree_string(&(udv->udv_value));

Gstring(&(udv->udv_value),

(lf->prev && lf->prev->name) ? gp_strdup(lf->prev->name) : gp_strdup(""));

}

for (argindex = 1; argindex <= 9; argindex++) {

if ((udv = get_udv_by_name(argname[argindex]))) {

gpfree_string(&(udv->udv_value));

if (!call_args[argindex-1])

udv->udv_value.type = NOTDEFINED;

else

Gstring(&(udv->udv_value), gp_strdup(call_args[argindex-1]));

}

if ((udv = get_udv_by_name("ARGV")) && udv->udv_value.type == ARRAY) {

struct value *ARGV;

int argv_size = lf->argv[0].v.int_val;

init_array(udv, argv_size);

ARGV = udv->udv_value.v.value_array;

for (argindex = 0; argindex <= argv_size; argindex++)

ARGV[argindex] = lf->argv[argindex];

}

interactive = lf->interactive;

inline_num = lf->inline_num;

add_udv_by_name("GPVAL_LINENO")->udv_value.v.int_val = inline_num;

if_open_for_else = lf->if_open_for_else;

/* Restore saved input state and free the copy */

if (lf->tokens) {

num_tokens = lf->num_tokens;

c_token = lf->c_token;

assert(token_table_size >= lf->num_tokens+1);

memcpy(token, lf->tokens,

(lf->num_tokens+1) * sizeof(struct lexical_unit));

free(lf->tokens);

}

if (lf->input_line) {

strcpy(gp_input_line, lf->input_line);

free(lf->input_line);

}

free(lf->name);

free(lf->cmdline);

/* Clean up any local variables going out of scope */

if (lf->local_variables)

lf_exit_scope(lf->depth);

#ifdef USE_FUNCTIONBLOCKS

/* Restore action table context from which function block was called */

if (lf->shadow_at)

uncache_at(lf->shadow_at, lf->shadow_at_size);

if (evaluate_inside_functionblock > lf->depth) {

evaluate_inside_functionblock = 0;

FPRINTF((stderr, "Clearing flag evaluate_inside_functionblock on return to depth %d\n",

lf->depth));

}

#endif

lf_head = lf->prev;

free(lf);

return (TRUE);

}

/* lf_push is called from two different contexts:

* load_file passes fp and file name (3rd param NULL)

* do_string_and_free passes cmdline (1st and 2nd params NULL)

* In either case the routines lf_push/lf_pop save and restore state

* information that may be changed by executing commands from a file

* or from the passed command line.

void

lf_push(FILE *fp, char *name, char *cmdline)

{

LFS *lf;

int argindex;

lf = (LFS *) gp_alloc(sizeof(LFS), (char *) NULL);

if (lf == (LFS *) NULL) {

if (fp != (FILE *) NULL)

(void) fclose(fp); /* it won't be otherwise */

int_error(c_token, "not enough memory to load file");

}

lf->fp = fp; /* save this file pointer */

lf->name = name;

lf->cmdline = cmdline;

lf->interactive = interactive; /* save current state */

lf->inline_num = inline_num; /* save current line number */

lf->call_argc = call_argc;

/* Call arguments are irrelevant if invoked from do_string_and_free */

if (cmdline == NULL) {

struct udvt_entry *udv;

/* Save ARG0 through ARG9 */

for (argindex = 0; argindex < 10; argindex++) {

lf->call_args[argindex] = call_args[argindex];

call_args[argindex] = NULL; /* initially no args */

}

/* Save ARGV[] */

lf->argv[0].v.int_val = 0;

lf->argv[0].type = NOTDEFINED;

if ((udv = get_udv_by_name("ARGV")) && udv->udv_value.type == ARRAY) {

/* When called from the command line (-c option) call_argc correctly

* enumerates the entities on the command line, but they were not

* previously saved in ARGV.

int saved_args = udv->udv_value.v.value_array[0].v.int_val;

for (argindex = 0; argindex <= call_argc; argindex++) {

if (argindex > saved_args)

break;

lf->argv[argindex] = udv->udv_value.v.value_array[argindex];

if (lf->argv[argindex].type == STRING)

lf->argv[argindex].v.string_val =

gp_strdup(lf->argv[argindex].v.string_val);

}

lf->depth = lf_head ? lf_head->depth+1 : 0; /* recursion depth */

if (lf->depth > STACK_DEPTH)

int_error(NO_CARET, "load/eval nested too deeply");

lf->if_open_for_else = if_open_for_else;

lf->local_variables = FALSE;

lf->c_token = c_token;

lf->num_tokens = num_tokens;

lf->tokens = gp_alloc((num_tokens+1) * sizeof(struct lexical_unit),

"lf tokens");

memcpy(lf->tokens, token, (num_tokens+1) * sizeof(struct lexical_unit));

lf->input_line = gp_strdup(gp_input_line);

/* Only relevant for function block calls */

lf->shadow_at = NULL;

lf->shadow_at_size = 0;

lf->prev = lf_head; /* link to stack */

lf_head = lf;

}

/* used for reread vsnyder@math.jpl.nasa.gov */

FILE *

lf_top()

{

if (lf_head == (LFS *) NULL)

return ((FILE *) NULL);

return (lf_head->fp);

}

/* Guard against deleting or overwriting a script we are running from */

TBOOLEAN

called_from(const char *name)

{

LFS *frame = lf_head;

for (frame = lf_head; frame; frame = frame->prev) {

if (frame->name && !strcmp(name, frame->name))

return TRUE;

}

return FALSE;

}

/* Clean up from error inside a "load" or "call" scope

* (called from main).

void

lf_reset_after_error()

{

free(failed_file_name);

failed_file_name = NULL;

/* pop off everything on stack */

while (lf_pop());

}

/* Restore any variables that were shadowed by a local variable */

static void

lf_exit_scope(int depth)

{

struct udvt_entry *udv, *restored_udv;

struct udvt_entry *prev_udv = first_udv;

char prefix[13];

char *name;

snprintf(prefix, sizeof(prefix), "GPLOCAL_%03d_", depth);

FPRINTF((stderr, "Leaving scope of %s variables\n", prefix));

for (prev_udv = first_udv, udv = prev_udv->next_udv;

udv; prev_udv = udv, udv = udv->next_udv) {

if (strncmp(udv->udv_name,prefix,12))

continue;

name = &(udv->udv_name[12]);

restored_udv = get_udv_by_name(name);

if (restored_udv) {

if (restored_udv->udv_value.type == ARRAY) {

int subtype = restored_udv->udv_value.v.value_array[0].type;

if (subtype != TEMP_ARRAY && subtype != LOCAL_ARRAY)

/* prevents free_value from deleting permanent array content */

restored_udv->udv_value.type = NOTDEFINED;

}

free_value(&restored_udv->udv_value);

restored_udv->udv_value = udv->udv_value;

/* It is not sufficient to mark the shadow copy NOTDEFINED because if

* we see it later we would spuriously restore the original from it.

* Instead delete it altogether.

prev_udv->next_udv = udv->next_udv;

free(udv->udv_name);

free(udv);

udv = prev_udv;

}

FILE *

loadpath_fopen(const char *filename, const char *mode)

{

FILE *fp;

/* The global copy of fullname is only for the benefit of post.trm's

* automatic fontfile conversion via a constructed shell command.

free(loadpath_fontname);

loadpath_fontname = NULL;

#if defined(PIPES)

if (*filename == '<') {

restrict_popen();

if ((fp = popen(filename + 1, "r")) == (FILE *) NULL)

return (FILE *) 0;

} else

#endif /* PIPES */

if ((fp = fopen(filename, mode)) == (FILE *) NULL) {

/* try 'loadpath' variable */

char *fullname = NULL, *path;

while ((path = get_loadpath()) != NULL) {

/* length of path, dir separator, filename, \0 */

fullname = gp_realloc(fullname, strlen(path) + 1 + strlen(filename) + 1, "loadpath_fopen");

strcpy(fullname, path);

PATH_CONCAT(fullname, filename);

if ((fp = fopen(fullname, mode)) != NULL) {

/* free(fullname); */

loadpath_fontname = fullname;

fullname = NULL;

/* reset loadpath internals!

* maybe this can be replaced by calling get_loadpath with

* a NULL argument and some loadpath_handler internal logic */

while (get_loadpath());

break;

}

free(fullname);

}

#ifdef _WIN32

if (fp != NULL)

_setmode(_fileno(fp), _O_BINARY);

#endif

return fp;

}

/* Push current terminal.

* Called 1. in main(), just after init_terminal(),

* 2. from load_rcfile(),

* 3. anytime by user command "set term push".

static char *push_term_name = NULL;

static char *push_term_opts = NULL;

void

push_terminal(int is_interactive)

{

if (term) {

free(push_term_name);

free(push_term_opts);

push_term_name = gp_strdup(term->name);

push_term_opts = gp_strdup(term_options);

if (is_interactive)

fprintf(stderr, " pushed terminal %s %s\n", push_term_name, push_term_opts);

} else {

if (is_interactive)

fputs("\tcurrent terminal type is unknown\n", stderr);

}

/* Pop the terminal.

* Called anytime by user command "set term pop".

void

pop_terminal()

{

if (push_term_name != NULL) {

char *s;

int i = strlen(push_term_name) + 11;

if (push_term_opts) {

/* do_string() does not like backslashes -- thus remove them */

for (s=push_term_opts; *s; s++)

if (*s=='\\' || *s=='\n') *s=' ';

i += strlen(push_term_opts);

}

s = gp_alloc(i, "pop");

i = interactive;

interactive = 0;

sprintf(s,"set term %s %s", push_term_name, (push_term_opts ? push_term_opts : ""));

do_string_and_free(s);

interactive = i;

if (interactive)

fprintf(stderr," restored terminal is %s %s\n", term->name, ((*term_options) ? term_options : ""));

} else

fprintf(stderr,"No terminal has been pushed yet\n");

}

/* Parse a plot style. Used by 'set style {data|function}' and by (s)plot. */

enum PLOT_STYLE

get_style()

{

/* defined in plot.h */

enum PLOT_STYLE ps;

c_token++;

ps = lookup_table(&plotstyle_tbl[0], c_token);

c_token++;

if (ps == PLOT_STYLE_NONE)

int_error(c_token, "unrecognized plot type");

return ps;

}

/* Parse options for style filledcurves and fill fco accordingly.

* If no option given, set it to FILLEDCURVES_DEFAULT.

void

get_filledcurves_style_options(filledcurves_opts *fco)

{

enum filledcurves_opts_id p;

fco->closeto = FILLEDCURVES_DEFAULT;

fco->oneside = 0;

while ((p = lookup_table(&filledcurves_opts_tbl[0], c_token)) != -1) {

fco->closeto = p;

c_token++;

if (p == FILLEDCURVES_ABOVE) {

fco->oneside = 1;

continue;

} else if (p == FILLEDCURVES_BELOW) {

fco->oneside = -1;

continue;

}

fco->at = 0;

if (!equals(c_token, "="))

return;

/* parameter required for filledcurves x1=... and friends */

if (p < FILLEDCURVES_ATXY)

fco->closeto += 4;

c_token++;

fco->at = real_expression();

if (p != FILLEDCURVES_ATXY)

return;

/* two values required for FILLEDCURVES_ATXY */

if (!equals(c_token, ","))

int_error(c_token, "syntax is xy=<x>,<y>");

c_token++;

fco->aty = real_expression();

}

return;

}

/* Print filledcurves style options to a file (used by 'show' and 'save'

* commands).

void

filledcurves_options_tofile(filledcurves_opts *fco, FILE *fp)

{

if (fco->closeto == FILLEDCURVES_DEFAULT)

return;

if (fco->oneside)

fputs(fco->oneside > 0 ? "above " : "below ", fp);

if (fco->closeto == FILLEDCURVES_CLOSED) {

fputs("closed", fp);

return;

}

if (fco->closeto <= FILLEDCURVES_Y2) {

fputs(filledcurves_opts_tbl[fco->closeto].key, fp);

return;

}

if (fco->closeto <= FILLEDCURVES_ATY2) {

fprintf(fp, "%s=%g", filledcurves_opts_tbl[fco->closeto - 4].key, fco->at);

return;

}

if (fco->closeto == FILLEDCURVES_ATXY) {

fprintf(fp, "xy=%g,%g", fco->at, fco->aty);

return;

}

TBOOLEAN

need_fill_border(struct fill_style_type *fillstyle)

{

struct lp_style_type p;

p.pm3d_color = fillstyle->border_color;

if (p.pm3d_color.type == TC_LT) {

/* Doesn't want a border at all */

if (p.pm3d_color.lt == LT_NODRAW)

return FALSE;

load_linetype(&p, p.pm3d_color.lt+1);

}

/* Wants a border in a new color */

if (p.pm3d_color.type != TC_DEFAULT)

apply_pm3dcolor(&p.pm3d_color);

return TRUE;

}

int

parse_dashtype(struct t_dashtype *dt)

{

int res = DASHTYPE_SOLID;

int j = 0;

int k = 0;

char *dash_str = NULL;

/* Erase any previous contents */

memset(dt, 0, sizeof(struct t_dashtype));

/* Fill in structure based on keyword ... */

if (equals(c_token, "solid")) {

res = DASHTYPE_SOLID;

c_token++;

/* Or numerical pattern consisting of pairs solid,empty,solid,empty... */

} else if (equals(c_token, "(")) {

c_token++;

while (!END_OF_COMMAND) {

if (j >= DASHPATTERN_LENGTH) {

int_error(c_token, "too many pattern elements");

}

dt->pattern[j++] = real_expression(); /* The solid portion */

if (!equals(c_token++, ","))

int_error(c_token, "expecting comma");

dt->pattern[j++] = real_expression(); /* The empty portion */

if (equals(c_token, ")"))

break;

if (!equals(c_token++, ","))

int_error(c_token, "expecting comma");

}

if (!equals(c_token, ")"))

int_error(c_token, "expecting , or )");

c_token++;

res = DASHTYPE_CUSTOM;

/* Or string representing pattern elements ... */

} else if ((dash_str = try_to_get_string())) {

int leading_space = 0;

#define DSCALE 10.

while (dash_str[j] && (k < DASHPATTERN_LENGTH || dash_str[j] == ' ')) {

/* . Dot with short space

* - Dash with regular space

* _ Long dash with regular space

* space Don't add new dash, just increase last space */

switch (dash_str[j]) {

case '.':

dt->pattern[k++] = 0.2 * DSCALE;

dt->pattern[k++] = 0.5 * DSCALE;

break;

case '-':

dt->pattern[k++] = 1.0 * DSCALE;

break;

case '_':

dt->pattern[k++] = 2.0 * DSCALE;

dt->pattern[k++] = 1.0 * DSCALE;

break;

case ' ':

if (k == 0)

leading_space++;

else

dt->pattern[k-1] += 1.0 * DSCALE;

break;

default:

int_error(c_token - 1, "expecting one of . - _ or space");

}

j++;

}

/* Move leading space, if any, to the end */

if (k > 0)

dt->pattern[k-1] += leading_space * DSCALE;

#undef DSCALE

/* truncate dash_str if we ran out of space in the array representation */

dash_str[j] = '\0';

safe_strncpy(dt->dstring, dash_str, sizeof(dt->dstring));

free(dash_str);

if (k == 0)

res = DASHTYPE_SOLID;

else

res = DASHTYPE_CUSTOM;

/* Or index of previously defined dashtype */

} else {

res = int_expression();

if (res < 0)

int_error(c_token - 1, "dashtype must be non-negative");

if (res == 0)

res = DASHTYPE_AXIS;

else

res = res - 1;

}

return res;

}

* destination_class tells us whether we are filling in a line style ('set style line'),

* a persistent linetype ('set linetype') or an ad hoc set of properties for a single

* use ('plot ... lc foo lw baz').

* allow_point controls whether we accept a point attribute in this lp_style.

int

lp_parse(struct lp_style_type *lp, lp_class destination_class, TBOOLEAN allow_point)

{

/* keep track of which options were set during this call */

int set_lt = 0, set_pal = 0, set_lw = 0;

int set_pt = 0, set_ps = 0, set_pi = 0;

int set_pn = 0;

int set_dt = 0;

int new_lt = 0;

int set_colormap = 0;

/* EAM Mar 2010 - We don't want properties from a user-defined default

* linetype to override properties explicitly set here. So fill in a

* local lp_style_type as we go and then copy over the specifically

* requested properties on top of the default ones.

struct lp_style_type newlp = *lp;

if ((destination_class == LP_ADHOC)

&& (almost_equals(c_token, "lines$tyle") || equals(c_token, "ls"))) {

c_token++;

lp_use_properties(lp, int_expression());

}

while (!END_OF_COMMAND) {

TBOOLEAN lt_really_means_lc = FALSE;

/* This special case is to catch an attempt to "set object N lt <lt>",

* which would otherwise be accepted but ignored, leading to confusion.

View remainder of file in raw view

gnuplot/src/misc.c at master · gnuplot/gnuplot · GitHub

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