[35aab3] | 1 | /**************************************** |
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| 2 | * Computer Algebra System SINGULAR * |
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| 3 | ****************************************/ |
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[be2303] | 4 | /* $Id: feread.cc,v 1.12 2008-09-17 08:05:12 Singular Exp $ */ |
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[35aab3] | 5 | /* |
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| 6 | * ABSTRACT: input from ttys, simulating fgets |
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| 7 | */ |
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| 8 | |
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| 9 | #include "mod2.h" |
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| 10 | |
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| 11 | // ---------------------------------------- |
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| 12 | // system settings: |
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| 13 | |
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| 14 | #undef USE_READLINE4 |
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| 15 | |
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[6a90646] | 16 | #define OM_NO_MALLOC_MACROS |
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[35aab3] | 17 | |
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| 18 | //---------------------------------------- |
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| 19 | #ifdef ix86_Win |
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| 20 | #define READLINE_STATIC |
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| 21 | #endif |
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| 22 | #include "febase.h" |
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| 23 | #include "omalloc.h" |
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| 24 | |
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| 25 | #include "../Singular/static.h" |
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| 26 | |
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| 27 | #ifdef HAVE_STATIC |
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| 28 | #undef HAVE_DYN_RL |
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| 29 | #endif |
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| 30 | |
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| 31 | #ifdef ix86_Linux |
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| 32 | #undef HAVE_FEREAD |
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| 33 | // not compatible with glibc2 |
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| 34 | #endif |
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| 35 | |
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| 36 | #if defined(HAVE_DYN_RL) |
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| 37 | #include <unistd.h> |
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| 38 | #endif |
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| 39 | |
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[88d631] | 40 | static char * fe_fgets_stdin_init(const char *pr,char *s, int size); |
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| 41 | char * (*fe_fgets_stdin)(const char *pr,char *s, int size) |
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[35aab3] | 42 | = fe_fgets_stdin_init; |
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| 43 | |
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[b6e51b] | 44 | extern char *iiArithGetCmd(int); |
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| 45 | |
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[35aab3] | 46 | /* ===================================================================*/ |
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| 47 | /* = static/dymanic readline = */ |
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| 48 | /* ===================================================================*/ |
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[e860fa] | 49 | #if defined(HAVE_READLINE) || defined(HAVE_DYN_RL) || defined(HAVE_LIBREADLINE) |
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[35aab3] | 50 | |
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| 51 | #include "../Singular/ipshell.h" |
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| 52 | |
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| 53 | #ifndef STDOUT_FILENO |
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| 54 | #define STDOUT_FILENO 1 |
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| 55 | #endif |
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| 56 | |
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| 57 | /* Generator function for command completion. STATE lets us know whether |
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| 58 | * to start from scratch; without any state (i.e. STATE == 0), then we |
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| 59 | * start at the top of the list. |
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| 60 | */ |
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| 61 | extern "C" |
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| 62 | char *command_generator (char *text, int state) |
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| 63 | { |
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| 64 | static int list_index, len; |
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| 65 | char *name; |
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| 66 | |
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| 67 | /* If this is a new word to complete, initialize now. This includes |
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| 68 | saving the length of TEXT for efficiency, and initializing the index |
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| 69 | variable to 0. */ |
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| 70 | if (state==0) |
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| 71 | { |
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| 72 | list_index = 1; |
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| 73 | len = strlen (text); |
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| 74 | } |
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| 75 | |
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| 76 | /* Return the next name which partially matches from the command list. */ |
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[b6e51b] | 77 | while ((name = iiArithGetCmd(list_index))!=NULL) |
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[35aab3] | 78 | { |
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| 79 | list_index++; |
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| 80 | |
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| 81 | if (strncmp (name, text, len) == 0) |
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| 82 | return (strdup(name)); |
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| 83 | } |
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| 84 | |
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| 85 | /* If no names matched, then return NULL. */ |
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| 86 | return ((char *)NULL); |
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| 87 | } |
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| 88 | #endif |
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| 89 | |
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| 90 | /* ===================================================================*/ |
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| 91 | /* = static readline = */ |
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| 92 | /* ===================================================================*/ |
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| 93 | /* some procedure are shared with "dynamic readline" */ |
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[c19e54] | 94 | #if (defined(HAVE_READLINE) || defined(HAVE_LIBREADLINE) || defined(HAVE_DYN_RL)) |
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[35aab3] | 95 | #include <unistd.h> |
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| 96 | #include <stdio.h> |
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| 97 | #include <stdlib.h> |
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| 98 | #include <sys/types.h> |
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| 99 | #include <sys/file.h> |
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| 100 | #include <sys/stat.h> |
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| 101 | #include <sys/errno.h> |
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| 102 | |
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| 103 | // #undef READLINE_READLINE_H_OK |
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| 104 | |
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| 105 | extern "C" { |
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| 106 | typedef char * (*RL_PROC)(const char*,int); |
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[c19e54] | 107 | #ifdef READLINE_READLINE_H_OK |
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| 108 | #include <readline/readline.h> |
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| 109 | #ifdef HAVE_READLINE_HISTORY_H |
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| 110 | #include <readline/history.h> |
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| 111 | #endif |
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[35aab3] | 112 | #endif |
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[c19e54] | 113 | |
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| 114 | #ifdef RL_VERSION_MAJOR |
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| 115 | #if (RL_VERSION_MAJOR >= 4) |
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| 116 | #define USE_READLINE4 |
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| 117 | #endif |
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| 118 | #endif |
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| 119 | |
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| 120 | #ifndef USE_READLINE4 |
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| 121 | #define rl_filename_completion_function filename_completion_function |
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| 122 | #define rl_completion_matches completion_matches |
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| 123 | #endif |
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| 124 | #ifndef READLINE_READLINE_H_OK |
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| 125 | /* declare everything we need explicitely and do not rely on includes */ |
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| 126 | extern char * rl_readline_name; |
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| 127 | extern char *rl_line_buffer; |
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| 128 | char *rl_filename_completion_function(const char*, int); |
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| 129 | typedef char **CPPFunction (); |
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| 130 | |
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| 131 | extern char ** rl_completion_matches (const char*, RL_PROC); |
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| 132 | extern CPPFunction * rl_attempted_completion_function; |
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| 133 | extern FILE * rl_outstream; |
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[be2303] | 134 | extern char * readline (const char *); |
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[c19e54] | 135 | extern void add_history (char *); |
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| 136 | extern int write_history (); |
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| 137 | extern void using_history(); |
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| 138 | extern int read_history(char *); |
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| 139 | extern int history_total_bytes(); |
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| 140 | #endif /* READLINE_READLINE_H_OK */ |
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| 141 | |
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| 142 | typedef char * (*PROC)(); |
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[35aab3] | 143 | |
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| 144 | typedef char **RL_CPPFunction (const char*, int,int); |
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| 145 | } |
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| 146 | |
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| 147 | |
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[88d631] | 148 | char * fe_fgets_stdin_rl(const char *pr,char *s, int size); |
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[35aab3] | 149 | |
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| 150 | /* Tell the GNU Readline library how to complete. We want to try to complete |
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| 151 | on command names or on filenames if it is preceded by " */ |
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| 152 | |
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| 153 | /* Attempt to complete on the contents of TEXT. START and END show the |
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| 154 | * region of TEXT that contains the word to complete. We can use the |
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| 155 | * entire line in case we want to do some simple parsing. Return the |
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| 156 | * array of matches, or NULL if there aren't any. |
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| 157 | */ |
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[e860fa] | 158 | #if defined(HAVE_DYN_RL) |
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| 159 | extern "C" |
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| 160 | { |
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| 161 | int fe_init_dyn_rl(); |
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| 162 | char *(*fe_filename_completion_function)(); /* 3 */ |
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[41b8d6] | 163 | char *(* fe_readline) (char *); /* 4 */ |
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| 164 | void (*fe_add_history) (char *); /* 5 */ |
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[e860fa] | 165 | char ** fe_rl_readline_name; /* 6 */ |
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| 166 | char **fe_rl_line_buffer; /* 7 */ |
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[c19e54] | 167 | char **(*fe_completion_matches)(...); /* 8 */ |
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[e860fa] | 168 | CPPFunction **fe_rl_attempted_completion_function; /* 9 */ |
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| 169 | FILE ** fe_rl_outstream; /* 10 */ |
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| 170 | int (*fe_write_history) (); /* 11 */ |
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| 171 | int (*fe_history_total_bytes) (); /* 12 */ |
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| 172 | void (*fe_using_history) (); /* 13 */ |
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[41b8d6] | 173 | int (*fe_read_history) (char *); /* 14 */ |
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[e860fa] | 174 | |
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| 175 | } |
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| 176 | #endif |
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[35aab3] | 177 | char ** singular_completion (char *text, int start, int end) |
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| 178 | { |
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| 179 | /* If this word is not in a string, then it may be a command |
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| 180 | to complete. Otherwise it may be the name of a file in the current |
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| 181 | directory. */ |
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[e860fa] | 182 | #ifdef HAVE_DYN_RL |
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| 183 | #define x_rl_line_buffer (*fe_rl_line_buffer) |
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| 184 | #define x_rl_completion_matches (*fe_completion_matches) |
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| 185 | #define x_rl_filename_completion_function (*fe_filename_completion_function) |
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| 186 | #else |
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| 187 | #define x_rl_line_buffer rl_line_buffer |
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| 188 | #define x_rl_completion_matches rl_completion_matches |
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| 189 | #define x_rl_filename_completion_function rl_filename_completion_function |
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| 190 | #endif |
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| 191 | if (x_rl_line_buffer[start-1]=='"') |
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| 192 | return x_rl_completion_matches (text, (RL_PROC)x_rl_filename_completion_function); |
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| 193 | char **m=x_rl_completion_matches (text, (RL_PROC)command_generator); |
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| 194 | #undef x_rl_line_buffer |
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| 195 | #undef x_rl_completion_matches |
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[35aab3] | 196 | if (m==NULL) |
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| 197 | { |
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| 198 | m=(char **)malloc(2*sizeof(char*)); |
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| 199 | m[0]=(char *)malloc(end-start+2); |
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| 200 | strncpy(m[0],text,end-start+1); |
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| 201 | m[1]=NULL; |
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| 202 | } |
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| 203 | return m; |
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| 204 | } |
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| 205 | |
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[e860fa] | 206 | #ifndef HAVE_DYN_RL |
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[88d631] | 207 | char * fe_fgets_stdin_rl(const char *pr,char *s, int size) |
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[35aab3] | 208 | { |
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| 209 | if (!BVERBOSE(V_PROMPT)) |
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| 210 | { |
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| 211 | pr=""; |
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| 212 | } |
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| 213 | mflush(); |
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| 214 | |
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| 215 | char *line; |
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| 216 | line = readline (pr); |
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| 217 | |
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| 218 | if (line==NULL) |
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| 219 | return NULL; |
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| 220 | |
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| 221 | if (*line!='\0') |
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| 222 | { |
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| 223 | add_history (line); |
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| 224 | } |
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| 225 | int l=strlen(line); |
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| 226 | if (l>=size-1) |
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| 227 | { |
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| 228 | strncpy(s,line,size); |
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| 229 | } |
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| 230 | else |
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| 231 | { |
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| 232 | strncpy(s,line,l); |
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| 233 | s[l]='\n'; |
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| 234 | s[l+1]='\0'; |
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| 235 | } |
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| 236 | free (line); |
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| 237 | |
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| 238 | return s; |
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| 239 | } |
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| 240 | #endif |
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[e860fa] | 241 | #endif |
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[35aab3] | 242 | |
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| 243 | /* ===================================================================*/ |
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| 244 | /* = emulated readline = */ |
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| 245 | /* ===================================================================*/ |
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| 246 | #if !defined(HAVE_READLINE) && defined(HAVE_FEREAD) |
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| 247 | extern "C" { |
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[88d631] | 248 | char * fe_fgets_stdin_fe(const char *pr,char *s, int size); |
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[35aab3] | 249 | } |
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[88d631] | 250 | char * fe_fgets_stdin_emu(const char *pr,char *s, int size) |
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[35aab3] | 251 | { |
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| 252 | if (!BVERBOSE(V_PROMPT)) |
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| 253 | { |
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| 254 | pr=""; |
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| 255 | } |
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| 256 | mflush(); |
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| 257 | return fe_fgets_stdin_fe(pr,s,size); |
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| 258 | } |
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| 259 | #endif |
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| 260 | |
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| 261 | /* ===================================================================*/ |
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| 262 | /* = dynamic readline = */ |
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| 263 | /* ===================================================================*/ |
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| 264 | /* some procedure are shared with "static readline" */ |
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| 265 | #if defined(HAVE_DYN_RL) |
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[88d631] | 266 | char * fe_fgets_stdin_drl(const char *pr,char *s, int size) |
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[35aab3] | 267 | { |
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| 268 | if (!BVERBOSE(V_PROMPT)) |
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| 269 | { |
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| 270 | pr=""; |
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| 271 | } |
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| 272 | mflush(); |
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| 273 | |
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| 274 | char *line; |
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| 275 | line = (*fe_readline) (pr); |
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| 276 | |
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| 277 | if (line==NULL) |
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| 278 | return NULL; |
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| 279 | |
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| 280 | if (*line!='\0') |
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| 281 | { |
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| 282 | (*fe_add_history) (line); |
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| 283 | } |
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| 284 | int l=strlen(line); |
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| 285 | if (l>=size-1) |
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| 286 | { |
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| 287 | strncpy(s,line,size); |
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| 288 | } |
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| 289 | else |
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| 290 | { |
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| 291 | strncpy(s,line,l); |
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| 292 | s[l]='\n'; |
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| 293 | s[l+1]='\0'; |
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| 294 | } |
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| 295 | free (line); |
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| 296 | |
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| 297 | return s; |
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| 298 | } |
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| 299 | #endif |
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| 300 | |
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| 301 | /* ===================================================================*/ |
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| 302 | /* = fgets = */ |
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| 303 | /* ===================================================================*/ |
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[88d631] | 304 | char * fe_fgets(const char *pr,char *s, int size) |
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[35aab3] | 305 | { |
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| 306 | if (BVERBOSE(V_PROMPT)) |
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| 307 | { |
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| 308 | fprintf(stdout,pr); |
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[cea6f3] | 309 | #ifdef DEFECT_SINGULAR |
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| 310 | fprintf(stdout,"\n"); |
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| 311 | #endif |
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[35aab3] | 312 | } |
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| 313 | mflush(); |
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| 314 | return fgets(s,size,stdin); |
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| 315 | } |
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| 316 | |
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| 317 | /* ===================================================================*/ |
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| 318 | /* = init for static rl, dyn. rl, emu. rl = */ |
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| 319 | /* ===================================================================*/ |
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[88d631] | 320 | static char * fe_fgets_stdin_init(const char *pr,char *s, int size) |
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[35aab3] | 321 | { |
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[e860fa] | 322 | #if (defined(HAVE_READLINE) || defined(HAVE_LIBREADLINE)) && !defined(HAVE_DYN_RL) && !defined(HAVE_FEREAD) |
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[35aab3] | 323 | /* Allow conditional parsing of the ~/.inputrc file. */ |
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| 324 | rl_readline_name = "Singular"; |
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| 325 | /* Tell the completer that we want a crack first. */ |
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| 326 | #ifdef USE_READLINE4 |
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| 327 | rl_attempted_completion_function = (rl_completion_func_t *)singular_completion; |
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| 328 | #else |
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| 329 | rl_attempted_completion_function = (CPPFunction *)singular_completion; |
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| 330 | #endif |
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| 331 | |
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| 332 | /* set the output stream */ |
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| 333 | if(!isatty(STDOUT_FILENO)) |
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| 334 | { |
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| 335 | #ifdef atarist |
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| 336 | rl_outstream = fopen( "/dev/tty", "w" ); |
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| 337 | #else |
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| 338 | rl_outstream = fopen( ttyname(fileno(stdin)), "w" ); |
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| 339 | #endif |
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| 340 | } |
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| 341 | |
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| 342 | /* try to read a history */ |
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| 343 | using_history(); |
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| 344 | char *p = getenv("SINGULARHIST"); |
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| 345 | if (p != NULL) |
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| 346 | { |
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| 347 | read_history (p); |
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| 348 | } |
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| 349 | fe_fgets_stdin=fe_fgets_stdin_rl; |
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| 350 | return(fe_fgets_stdin_rl(pr,s,size)); |
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| 351 | #endif |
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| 352 | #ifdef HAVE_DYN_RL |
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| 353 | /* do dynamic loading */ |
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| 354 | int res=fe_init_dyn_rl(); |
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| 355 | if (res!=0) |
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| 356 | { |
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| 357 | //if (res==1) |
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| 358 | // WarnS("dynamic loading of libreadline failed"); |
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| 359 | //else |
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| 360 | // Warn("dynamic loading failed: %d\n",res); |
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| 361 | if (res!=1) |
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| 362 | Warn("dynamic loading failed: %d\n",res); |
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| 363 | #ifdef HAVE_FEREAD |
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| 364 | fe_fgets_stdin=fe_fgets_stdin_emu; |
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| 365 | #else |
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| 366 | fe_fgets_stdin=fe_fgets; |
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| 367 | #endif |
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| 368 | return fe_fgets_stdin(pr,s,size); |
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| 369 | } |
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[e860fa] | 370 | else /* could load libreadline: */ |
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| 371 | { |
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| 372 | /* Allow conditional parsing of the ~/.inputrc file. */ |
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| 373 | *fe_rl_readline_name = "Singular"; |
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| 374 | /* Tell the completer that we want a crack first. */ |
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| 375 | *fe_rl_attempted_completion_function = (CPPFunction *)singular_completion; |
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| 376 | /* try to read a history */ |
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| 377 | (*fe_using_history)(); |
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| 378 | char *p = getenv("SINGULARHIST"); |
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| 379 | if (p != NULL) |
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| 380 | { |
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| 381 | (*fe_read_history) (p); |
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| 382 | } |
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| 383 | } |
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[35aab3] | 384 | |
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| 385 | /* set the output stream */ |
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| 386 | if(!isatty(STDOUT_FILENO)) |
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| 387 | { |
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| 388 | #ifdef atarist |
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| 389 | *fe_rl_outstream = fopen( "/dev/tty", "w" ); |
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| 390 | #else |
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| 391 | *fe_rl_outstream = fopen( ttyname(fileno(stdin)), "w" ); |
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| 392 | #endif |
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| 393 | } |
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| 394 | |
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| 395 | fe_fgets_stdin=fe_fgets_stdin_drl; |
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| 396 | return fe_fgets_stdin_drl(pr,s,size); |
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| 397 | #else |
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| 398 | #if !defined(HAVE_READLINE) && defined(HAVE_FEREAD) |
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| 399 | fe_fgets_stdin=fe_fgets_stdin_emu; |
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| 400 | return(fe_fgets_stdin_emu(pr,s,size)); |
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| 401 | #else |
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| 402 | fe_fgets_stdin=fe_fgets; |
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| 403 | return(fe_fgets(pr,s,size)); |
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| 404 | #endif |
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| 405 | #endif |
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| 406 | } |
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| 407 | |
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| 408 | /* ===================================================================*/ |
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| 409 | /* = TCL = */ |
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| 410 | /* ===================================================================*/ |
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| 411 | #ifdef HAVE_TCL |
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| 412 | /* tcl: */ |
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[88d631] | 413 | char * fe_fgets_tcl(const char *pr,char *s, int size) |
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[35aab3] | 414 | { |
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| 415 | if(currRing!=NULL) PrintTCLS('P',pr); |
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| 416 | else PrintTCLS('U',pr); |
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| 417 | mflush(); |
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| 418 | return fgets(s,size,stdin); |
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| 419 | } |
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| 420 | |
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| 421 | #endif |
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| 422 | |
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| 423 | /* ===================================================================*/ |
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| 424 | /* = batch mode = */ |
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| 425 | /* ===================================================================*/ |
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| 426 | /* dummy (for batch mode): */ |
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[88d631] | 427 | char * fe_fgets_dummy(const char *pr,char *s, int size) |
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[35aab3] | 428 | { |
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| 429 | return NULL; |
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| 430 | } |
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| 431 | |
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