X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/cff262f0a0384a8aaf0d719a32792fcc7ff89293..291d809da56d391a5e1aac7588bc0b4f4cdff260:/src/xbt/xbt_str.c diff --git a/src/xbt/xbt_str.c b/src/xbt/xbt_str.c index 18fb8eda78..b2593e5f1f 100644 --- a/src/xbt/xbt_str.c +++ b/src/xbt/xbt_str.c @@ -1,160 +1,141 @@ - /* xbt_str.c - various helping functions to deal with strings */ -/* Copyright (C) 2005-2007 Malek Cherier, Martin Quinson. */ -/* All rights reserved. */ +/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team. + * All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it - * under the terms of the license (GNU LGPL) which comes with this package. - */ + * under the terms of the license (GNU LGPL) which comes with this package. */ -/* Returns the string without leading whitespaces (xbt_str_ltrim), - * trailing whitespaces (xbt_str_rtrim), - * or both leading and trailing whitespaces (xbt_str_trim). - * (in-place modification of the string) - */ - +#include "portable.h" #include "xbt/misc.h" #include "xbt/sysdep.h" -#include "xbt/str.h" /* headers of these functions */ -#include "portable.h" -#include "xbt/matrix.h" /* for the diff */ - -static void free_string(void *d){ - free(*(void**)d); -} +#include "xbt/str.h" /* headers of these functions */ +#include "xbt/strbuff.h" +#include "xbt/matrix.h" /* for the diff */ /** @brief Strip whitespace (or other characters) from the end of a string. * - * This function returns a string with whitespace stripped from the end of s. - * By default (without the second parameter char_list), xbt_str_rtrim() will strip these characters : - * - * - " " (ASCII 32 (0x20)) space. - * - "\t" (ASCII 9 (0x09)) tab. - * - "\n" (ASCII 10 (0x0A)) line feed. - * - "\r" (ASCII 13 (0x0D)) carriage return. - * - "\0" (ASCII 0 (0x00)) NULL. - * - "\x0B" (ASCII 11 (0x0B)) vertical tab. + * Strips the whitespaces from the end of s. + * By default (when char_list=NULL), these characters get stripped: * - * @param s The string to strip. + * - " " (ASCII 32 (0x20)) space. + * - "\t" (ASCII 9 (0x09)) tab. + * - "\n" (ASCII 10 (0x0A)) line feed. + * - "\r" (ASCII 13 (0x0D)) carriage return. + * - "\0" (ASCII 0 (0x00)) NULL. + * - "\x0B" (ASCII 11 (0x0B)) vertical tab. + * + * @param s The string to strip. Modified in place. * @param char_list A string which contains the characters you want to strip. * - * @return If the specified is NULL the function returns NULL. Otherwise the - * function returns the string with whitespace stripped from the end. */ -char* -xbt_str_rtrim(char* s, const char* char_list) +void xbt_str_rtrim(char *s, const char *char_list) { - char* cur = s; - const char* __char_list = " \t\n\r\x0B"; - char white_char[256] = {1,0}; - - if(!s) - return NULL; - - if(!char_list){ - while(*__char_list) { - white_char[(unsigned char)*__char_list++] = 1; - } - }else{ - while(*char_list) { - white_char[(unsigned char)*char_list++] = 1; - } - } - - while(*cur) - ++cur; - - while((cur >= s) && white_char[(unsigned char)*cur]) - --cur; - - *++cur = '\0'; - return s; + char *cur = s; + const char *__char_list = " \t\n\r\x0B"; + char white_char[256] = { 1, 0 }; + + if (!s) + return; + + if (!char_list) { + while (*__char_list) { + white_char[(unsigned char) *__char_list++] = 1; + } + } else { + while (*char_list) { + white_char[(unsigned char) *char_list++] = 1; + } + } + + while (*cur) + ++cur; + + while ((cur >= s) && white_char[(unsigned char) *cur]) + --cur; + + *++cur = '\0'; } /** @brief Strip whitespace (or other characters) from the beginning of a string. * - * This function returns a string with whitespace stripped from the beginning of s. - * By default (without the second parameter char_list), xbt_str_ltrim() will strip these characters : - * - * - " " (ASCII 32 (0x20)) space. - * - "\t" (ASCII 9 (0x09)) tab. - * - "\n" (ASCII 10 (0x0A)) line feed. - * - "\r" (ASCII 13 (0x0D)) carriage return. - * - "\0" (ASCII 0 (0x00)) NULL. - * - "\x0B" (ASCII 11 (0x0B)) vertical tab. + * Strips the whitespaces from the begining of s. + * By default (when char_list=NULL), these characters get stripped: * - * @param s The string to strip. + * - " " (ASCII 32 (0x20)) space. + * - "\t" (ASCII 9 (0x09)) tab. + * - "\n" (ASCII 10 (0x0A)) line feed. + * - "\r" (ASCII 13 (0x0D)) carriage return. + * - "\0" (ASCII 0 (0x00)) NULL. + * - "\x0B" (ASCII 11 (0x0B)) vertical tab. + * + * @param s The string to strip. Modified in place. * @param char_list A string which contains the characters you want to strip. * - * @return If the specified is NULL the function returns NULL. Otherwise the - * function returns the string with whitespace stripped from the beginning. */ -char* -xbt_str_ltrim( char* s, const char* char_list) +void xbt_str_ltrim(char *s, const char *char_list) { - char* cur = s; - const char* __char_list = " \t\n\r\x0B"; - char white_char[256] = {1,0}; - - if(!s) - return NULL; - - if(!char_list){ - while(*__char_list) { - white_char[(unsigned char)*__char_list++] = 1; - } - }else{ - while(*char_list) { - white_char[(unsigned char)*char_list++] = 1; - } - } - - while(*cur && white_char[(unsigned char)*cur]) - ++cur; - - return memmove(s,cur, strlen(cur)); + char *cur = s; + const char *__char_list = " \t\n\r\x0B"; + char white_char[256] = { 1, 0 }; + + if (!s) + return; + + if (!char_list) { + while (*__char_list) { + white_char[(unsigned char) *__char_list++] = 1; + } + } else { + while (*char_list) { + white_char[(unsigned char) *char_list++] = 1; + } + } + + while (*cur && white_char[(unsigned char) *cur]) + ++cur; + + memmove(s, cur, strlen(cur) + 1); } /** @brief Strip whitespace (or other characters) from the end and the begining of a string. * - * This returns a string with whitespace stripped from the end and the begining of s. - * By default (without the second parameter char_list), xbt_str_trim() will strip these characters : - * - * - " " (ASCII 32 (0x20)) space. - * - "\t" (ASCII 9 (0x09)) tab. - * - "\n" (ASCII 10 (0x0A)) line feed. - * - "\r" (ASCII 13 (0x0D)) carriage return. - * - "\0" (ASCII 0 (0x00)) NULL. - * - "\x0B" (ASCII 11 (0x0B)) vertical tab. + * Strips the whitespaces from both the beginning and the end of s. + * By default (when char_list=NULL), these characters get stripped: + * + * - " " (ASCII 32 (0x20)) space. + * - "\t" (ASCII 9 (0x09)) tab. + * - "\n" (ASCII 10 (0x0A)) line feed. + * - "\r" (ASCII 13 (0x0D)) carriage return. + * - "\0" (ASCII 0 (0x00)) NULL. + * - "\x0B" (ASCII 11 (0x0B)) vertical tab. * * @param s The string to strip. * @param char_list A string which contains the characters you want to strip. * - * @return If the specified is NULL the function returns NULL. Otherwise the - * function returns the string with whitespace stripped from the end and the begining. */ -char* -xbt_str_trim(char* s, const char* char_list ){ - - if(!s) - return NULL; - - return xbt_str_ltrim(xbt_str_rtrim(s,char_list),char_list); +void xbt_str_trim(char *s, const char *char_list) +{ + + if (!s) + return; + + xbt_str_rtrim(s, char_list); + xbt_str_ltrim(s, char_list); } /** @brief Replace double whitespaces (but no other characters) from the string. * * The function modifies the string so that each time that several spaces appear, - * they are replaced by a single space. It will only do so for spaces (ASCII 32, 0x20). + * they are replaced by a single space. It will only do so for spaces (ASCII 32, 0x20). * * @param s The string to strip. Modified in place. * */ -void -xbt_str_strip_spaces(char *s) { +void xbt_str_strip_spaces(char *s) +{ char *p = s; - int e = 0; + int e = 0; if (!s) return; @@ -162,56 +143,104 @@ xbt_str_strip_spaces(char *s) { while (1) { if (!*p) goto end; - + if (*p != ' ') break; - + p++; } - + e = 1; - + do { if (e) *s++ = *p; - + if (!*++p) goto end; - - if (e ^ (*p!=' ')) + + if (e ^ (*p != ' ')) if ((e = !e)) - *s++ = ' '; + *s++ = ' '; } while (1); - end: +end: *s = '\0'; } -/** @brief Splits a string into a dynar of strings - * +/** @brief Substitutes a char for another in a string + * + * @param str the string to modify + * @param from char to search + * @param to char to put instead + * @param occurence number of changes to do (=0 means all) + */ +void xbt_str_subst(char *str, char from, char to, int occurence) +{ + char *p = str; + while (*p != '\0') { + if (*p == from) { + *p = to; + if (occurence == 1) + return; + occurence--; + } + p++; + } +} + +/** @brief Replaces a set of variables by their values + * + * @param str The input of the replacement process + * @param patterns The changes to apply + * @return The string modified + * + * Both '$toto' and '${toto}' are valid (and the two writing are equivalent). + * + * If the variable name contains spaces, use the brace version (ie, ${toto tutu}) + * + * You can provide a default value to use if the variable is not set in the dict by using + * '${var:=default}' or '${var:-default}'. These two forms are equivalent, even if they + * shouldn't to respect the shell standard (:= form should set the value in the dict, + * but does not) (BUG). + */ + +char *xbt_str_varsubst(const char *str, xbt_dict_t patterns) +{ + xbt_strbuff_t buff = xbt_strbuff_new_from(str); + char *res; + xbt_strbuff_varsubst(buff, patterns); + res = buff->data; + xbt_strbuff_free_container(buff); + return res; +} + + +/** @brief Splits a string into a dynar of strings + * * @param s: the string to split * @param sep: a string of all chars to consider as separator. * - * By default (with sep=NULL), these characters are used as separator: - * - * - " " (ASCII 32 (0x20)) space. - * - "\t" (ASCII 9 (0x09)) tab. - * - "\n" (ASCII 10 (0x0A)) line feed. - * - "\r" (ASCII 13 (0x0D)) carriage return. - * - "\0" (ASCII 0 (0x00)) NULL. - * - "\x0B" (ASCII 11 (0x0B)) vertical tab. + * By default (with sep=NULL), these characters are used as separator: + * + * - " " (ASCII 32 (0x20)) space. + * - "\t" (ASCII 9 (0x09)) tab. + * - "\n" (ASCII 10 (0x0A)) line feed. + * - "\r" (ASCII 13 (0x0D)) carriage return. + * - "\0" (ASCII 0 (0x00)) NULL. + * - "\x0B" (ASCII 11 (0x0B)) vertical tab. */ -xbt_dynar_t xbt_str_split(char *s, const char *sep) { - char *str=xbt_strdup(s); - xbt_dynar_t res = xbt_dynar_new(sizeof(char*), free_string); - char *p, *q; +xbt_dynar_t xbt_str_split(const char *s, const char *sep) +{ + xbt_dynar_t res = xbt_dynar_new(sizeof(char *), &xbt_free_ref); + const char *p, *q; int done; - const char* sep_dflt = " \t\n\r\x0B"; - char is_sep[256] = {1,0}; + const char *sep_dflt = " \t\n\r\x0B"; + char is_sep[256] = { 1, 0 }; /* check what are the separators */ - memset(is_sep,0,sizeof(is_sep)); + memset(is_sep, 0, sizeof(is_sep)); if (!sep) { while (*sep_dflt) is_sep[(unsigned char) *sep_dflt++] = 1; @@ -219,191 +248,679 @@ xbt_dynar_t xbt_str_split(char *s, const char *sep) { while (*sep) is_sep[(unsigned char) *sep++] = 1; } - is_sep[0] = 1; /* End of string is also separator */ - + is_sep[0] = 1; /* End of string is also separator */ + /* Do the job */ - p=q=str; - done=0; + p = q = s; + done = 0; + + if (s[0] == '\0') + return res; + while (!done) { char *topush; - while (!is_sep[(unsigned char)*q]) { + while (!is_sep[(unsigned char) *q]) { q++; } - if (*q == '\0') { -#ifdef UNDEF - if (p==q) { - /* do not push last empty line */ - free(str); - return res; - } -#endif + if (*q == '\0') + done = 1; + + topush = xbt_malloc(q - p + 1); + memcpy(topush, p, q - p); + topush[q - p] = '\0'; + xbt_dynar_push(res, &topush); + p = ++q; + } + + return res; +} + +/** + * \brief This functions splits a string after using another string as separator + * For example A!!B!!C splitted after !! will return the dynar {A,B,C} + * \return An array of dynars containing the string tokens + */ +xbt_dynar_t xbt_str_split_str(const char *s, const char *sep) +{ + xbt_dynar_t res = xbt_dynar_new(sizeof(char *), &xbt_free_ref); + int done; + const char *p, *q; + + p = q = s; + done = 0; + + if (s[0] == '\0') + return res; + if (sep[0] == '\0') { + s = xbt_strdup(s); + xbt_dynar_push(res, &s); + return res; + } + + while (!done) { + char *to_push; + int v = 0; + //get the start of the first occurence of the substring + q = strstr(p, sep); + //if substring was not found add the entire string + if (NULL == q) { + v = strlen(p); + to_push = malloc(v + 1); + memcpy(to_push, p, v); + to_push[v] = '\0'; + xbt_dynar_push(res, &to_push); done = 1; } else { - *q='\0'; + //get the appearance + to_push = malloc(q - p + 1); + memcpy(to_push, p, q - p); + //add string terminator + to_push[q - p] = '\0'; + xbt_dynar_push(res, &to_push); + p = q + strlen(sep); } - topush=xbt_strdup(p); - xbt_dynar_push(res,&topush); - p = ++q; } - free (str); return res; } -/** @brief Join a set of strings as a single string */ +/** @brief Just like @ref xbt_str_split_quoted (Splits a string into a dynar of strings), but without memory allocation + * + * The string passed as argument must be writable (not const) + * The elements of the dynar are just parts of the string passed as argument. + * + * To free the structure constructed by this function, free the first element and free the dynar: + * + * free(xbt_dynar_get_ptr(dynar,0)); + * xbt_dynar_free(&dynar); + */ +xbt_dynar_t xbt_str_split_quoted_in_place(char *s) { + xbt_dynar_t res = xbt_dynar_new(sizeof(char *), NULL); + char *beg, *end; /* pointers around the parsed chunk */ + int in_simple_quote = 0, in_double_quote = 0; + int done = 0; + int ctn = 0; /* Got something in this block */ + + if (s[0] == '\0') + return res; + + beg = s; + + /* do not trim leading spaces: caller responsability to clean his cruft */ + end = beg; + + while (!done) { + + + switch (*end) { + case '\\': + ctn = 1; + /* Protected char; move it closer */ + memmove(end, end + 1, strlen(end)); + if (*end == '\0') + THROWF(arg_error, 0, "String ends with \\"); + end++; /* Pass the protected char */ + break; + + case '\'': + ctn = 1; + if (!in_double_quote) { + in_simple_quote = !in_simple_quote; + memmove(end, end + 1, strlen(end)); + } else { + /* simple quote protected by double ones */ + end++; + } + break; + case '"': + ctn = 1; + if (!in_simple_quote) { + in_double_quote = !in_double_quote; + memmove(end, end + 1, strlen(end)); + } else { + /* double quote protected by simple ones */ + end++; + } + break; -char *xbt_str_join(xbt_dynar_t dyn, const char*sep) { - int len=2; - int cpt; + case ' ': + case '\t': + case '\n': + case '\0': + if (*end == '\0' && (in_simple_quote || in_double_quote)) { + THROWF(arg_error, 0, + "End of string found while searching for %c in %s", + (in_simple_quote ? '\'' : '"'), s); + } + if (in_simple_quote || in_double_quote) { + end++; + } else { + if (*end == '\0') + done = 1; + + *end = '\0'; + if (ctn) { + /* Found a separator. Push the string if contains something */ + xbt_dynar_push(res, &beg); + } + ctn = 0; + + if (done) + break; + + beg = ++end; + /* trim within the string, manually to speed things up */ + while (*beg == ' ') + beg++; + end = beg; + } + break; + + default: + ctn = 1; + end++; + } + } + return res; +} + +/** @brief Splits a string into a dynar of strings, taking quotes into account + * + * It basically does the same argument separation than the shell, where white + * spaces can be escaped and where arguments are never split within a + * quote group. + * Several subsequent spaces are ignored (unless within quotes, of course). + * You may want to trim the input string, if you want to avoid empty entries + * + */ + +xbt_dynar_t xbt_str_split_quoted(const char *s) +{ + xbt_dynar_t res = xbt_dynar_new(sizeof(char *), &xbt_free_ref); + xbt_dynar_t parsed; + char *str_to_free; /* we have to copy the string before, to handle backslashes */ + unsigned int cursor; + char *p; + + if (s[0] == '\0') + return res; + str_to_free = xbt_strdup(s); + + parsed = xbt_str_split_quoted_in_place(str_to_free); + xbt_dynar_foreach(parsed,cursor,p) { + char *q=xbt_strdup(p); + xbt_dynar_push(res,&q); + } + free(str_to_free); + xbt_dynar_shrink(res, 0); + xbt_dynar_free(&parsed); + return res; +} + +/** @brief Join a set of strings as a single string */ +char *xbt_str_join(xbt_dynar_t dyn, const char *sep) +{ + int len = 1, dyn_len = xbt_dynar_length(dyn); + unsigned int cpt; char *cursor; - char *res,*p; + char *res, *p; + + if (!dyn_len) + return xbt_strdup(""); + /* compute the length */ - xbt_dynar_foreach(dyn,cpt,cursor) { - len+=strlen(cursor); + xbt_dynar_foreach(dyn, cpt, cursor) { + len += strlen(cursor); } - len+=strlen(sep)*(xbt_dynar_length(dyn)-1); + len += strlen(sep) * dyn_len; /* Do the job */ res = xbt_malloc(len); - p=res; - xbt_dynar_foreach(dyn,cpt,cursor) { - p+=sprintf(p,"%s%s",cursor,sep); + p = res; + xbt_dynar_foreach(dyn, cpt, cursor) { + if ((int) cpt < dyn_len - 1) + p += sprintf(p, "%s%s", cursor, sep); + else + p += sprintf(p, "%s", cursor); + } + return res; +} +/** @brief Join a set of strings as a single string + * + * The parameter must be a NULL-terminated array of chars, + * just like xbt_dynar_to_array() produces + */ +char *xbt_str_join_array(const char *const *strs, const char *sep) +{ + char *res,*q; + int amount_strings=0; + int len=0; + int i; + + if ((!strs) || (!strs[0])) + return xbt_strdup(""); + + /* compute the length before malloc */ + for (i=0;strs[i];i++) { + len += strlen(strs[i]); + amount_strings++; + } + len += strlen(sep) * amount_strings; + + /* Do the job */ + q = res = xbt_malloc(len); + for (i=0;strs[i];i++) { + if (i!=0) { // not first loop + q += sprintf(q, "%s%s", sep, strs[i]); + } else { + q += sprintf(q,"%s",strs[i]); + } } return res; } - -#ifndef HAVE_GETLINE -long getline(char **buf, size_t *n, FILE *stream) { - - int i, ch; - - if (!*buf) { - *buf = xbt_malloc(512); - *n = 512; - } - - if (feof(stream)) - return (ssize_t)-1; - - for (i=0; (ch = fgetc(stream)) != EOF; i++) { - - if (i >= (*n) + 1) - *buf = xbt_realloc(*buf, *n += 512); - - (*buf)[i] = ch; - - if ((*buf)[i] == '\n') { - i++; - (*buf)[i] = '\0'; - break; - } - } - - if (i == *n) - *buf = xbt_realloc(*buf, *n += 1); - - (*buf)[i] = '\0'; - - return (ssize_t)i; + +#if defined(SIMGRID_NEED_GETLINE) || defined(DOXYGEN) +/** @brief Get a single line from the stream (reimplementation of the GNU getline) + * + * This is a redefinition of the GNU getline function, used on platforms where it does not exists. + * + * getline() reads an entire line from stream, storing the address of the buffer + * containing the text into *buf. The buffer is null-terminated and includes + * the newline character, if one was found. + * + * If *buf is NULL, then getline() will allocate a buffer for storing the line, + * which should be freed by the user program. Alternatively, before calling getline(), + * *buf can contain a pointer to a malloc()-allocated buffer *n bytes in size. If the buffer + * is not large enough to hold the line, getline() resizes it with realloc(), updating *buf and *n + * as necessary. In either case, on a successful call, *buf and *n will be updated to + * reflect the buffer address and allocated size respectively. + */ +long getline(char **buf, size_t * n, FILE * stream) +{ + + size_t i; + int ch; + + if (!*buf) { + *buf = xbt_malloc(512); + *n = 512; + } + + if (feof(stream)) + return (ssize_t) - 1; + + for (i = 0; (ch = fgetc(stream)) != EOF; i++) { + + if (i >= (*n) + 1) + *buf = xbt_realloc(*buf, *n += 512); + + (*buf)[i] = ch; + + if ((*buf)[i] == '\n') { + i++; + (*buf)[i] = '\0'; + break; + } + } + + if (i == *n) + *buf = xbt_realloc(*buf, *n += 1); + + (*buf)[i] = '\0'; + + return (ssize_t) i; } -#endif /* HAVE_GETLINE */ +#endif /* HAVE_GETLINE */ /* - * Diff related functions + * Diff related functions */ -static xbt_matrix_t diff_build_LCS(xbt_dynar_t da, xbt_dynar_t db) { - xbt_matrix_t C = xbt_matrix_new(xbt_dynar_length(da),xbt_dynar_length(db), - sizeof(int),NULL); - int i,j; +static XBT_INLINE int diff_get(xbt_matrix_t C, int i, int j) +{ + return (i == -1 || j == -1) ? 0 : xbt_matrix_get_as(C, i, j, int); +} + +static xbt_matrix_t diff_build_LCS(xbt_dynar_t da, xbt_dynar_t db, + int len_a, int len_b) +{ + xbt_matrix_t C = xbt_matrix_new(len_a, len_b, sizeof(int), NULL); + int i, j; + /* Compute the LCS */ /* - C = array(0..m, 0..n) - for i := 0..m - C[i,0] = 0 - for j := 1..n - C[0,j] = 0 - for i := 1..m - for j := 1..n - if X[i] = Y[j] - C[i,j] := C[i-1,j-1] + 1 - else: - C[i,j] := max(C[i,j-1], C[i-1,j]) - return C[m,n] - */ - for (i=0; i 0 and j > 0 and X[i] = Y[j] - printDiff(C, X, Y, i-1, j-1) - print " " + X[i] - else - if j > 0 and (i = 0 or C[i,j-1] >= C[i-1,j]) - printDiff(C, X, Y, i, j-1) - print "+ " + Y[j] - else if i > 0 and (j = 0 or C[i,j-1] < C[i-1,j]) - printDiff(C, X, Y, i-1, j) - print "- " + X[i] - */ - - if (i>=0 && j >= 0 && !strcmp(xbt_dynar_get_as(da,i,char*), - xbt_dynar_get_as(db,j,char*))) { - diff_build_diff(res,C,da,db,i-1,j-1); - topush = bprintf(" %s",xbt_dynar_get_as(da,i,char*)); + /* Construct the diff + function printDiff(C[0..m,0..n], X[1..m], Y[1..n], i, j) + if i > 0 and j > 0 and X[i] = Y[j] + printDiff(C, X, Y, i-1, j-1) + print " " + X[i] + else + if j > 0 and (i = 0 or C[i,j-1] >= C[i-1,j]) + printDiff(C, X, Y, i, j-1) + print "+ " + Y[j] + else if i > 0 and (j = 0 or C[i,j-1] < C[i-1,j]) + printDiff(C, X, Y, i-1, j) + print "- " + X[i] + */ + + if (i >= 0 && j >= 0 && !strcmp(xbt_dynar_get_as(da, i, char *), + xbt_dynar_get_as(db, j, char *))) { + diff_build_diff(res, C, da, db, i - 1, j - 1); + topush = bprintf(" %s", xbt_dynar_get_as(da, i, char *)); + xbt_dynar_push(res, &topush); + } else if (j >= 0 && + (i == -1 || diff_get(C, i, j - 1) >= diff_get(C, i - 1, j))) { + diff_build_diff(res, C, da, db, i, j - 1); + topush = bprintf("+ %s", xbt_dynar_get_as(db, j, char *)); + xbt_dynar_push(res, &topush); + } else if (i >= 0 && + (j == -1 || diff_get(C, i, j - 1) < diff_get(C, i - 1, j))) { + diff_build_diff(res, C, da, db, i - 1, j); + topush = bprintf("- %s", xbt_dynar_get_as(da, i, char *)); xbt_dynar_push(res, &topush); - } else if (j>=0 && - (i<0 || xbt_matrix_get_as(C,i,j-1,int) >= xbt_matrix_get_as(C,i-1,j,int))) { - diff_build_diff(res,C,da,db,i,j-1); - topush = bprintf("+ %s",xbt_dynar_get_as(db,j,char*)); - xbt_dynar_push(res,&topush); - } else if (i>=0 && - (j<0 || xbt_matrix_get_as(C,i,j-1,int) < xbt_matrix_get_as(C,i-1,j,int))) { - diff_build_diff(res,C,da,db,i-1,j); - topush = bprintf("- %s",xbt_dynar_get_as(da,i,char*)); - xbt_dynar_push(res,&topush); - } else if (i<0 && j<0) { - return; - } else { - THROW_IMPOSSIBLE; } } /** @brief Compute the unified diff of two strings */ -char *xbt_str_diff(char *a, char *b) { +char *xbt_str_diff(const char *a, const char *b) +{ xbt_dynar_t da = xbt_str_split(a, "\n"); xbt_dynar_t db = xbt_str_split(b, "\n"); + xbt_matrix_t C; + xbt_dynar_t diff; + char *res; + size_t len; + unsigned length_da; + + diff = xbt_dynar_new(sizeof(char *), &xbt_free_ref); + + /* Clean empty lines at the end of da and db */ + len = strlen(a); + if (len > 0 && a[len - 1] == '\n') + xbt_dynar_pop(da, NULL); + len = strlen(b); + if (len > 0 && b[len - 1] == '\n') + xbt_dynar_pop(db, NULL); + + /* Find the common suffix, do it before extracting the prefix, + * as xbt_dynar_pop costs less than xbt_dynar_shift */ + length_da = xbt_dynar_length(da); + while (length_da > 0 && xbt_dynar_length(db) > 0 && + !strcmp(xbt_dynar_get_as(da, length_da - 1, char *), + xbt_dynar_getlast_as(db, char *))) { + xbt_dynar_pop(db, NULL); + length_da--; + } - xbt_matrix_t C = diff_build_LCS(da,db); - xbt_dynar_t diff = xbt_dynar_new(sizeof(char*),free_string); - char *res=NULL; - - diff_build_diff(diff, C, da,db, xbt_dynar_length(da)-1, xbt_dynar_length(db)-1); - res = xbt_str_join(diff, "\n"); + /* Extract the common prefix */ + while (length_da > 0 && xbt_dynar_length(db) > 0 && + !strcmp(xbt_dynar_getfirst_as(da, char *), + xbt_dynar_getfirst_as(db, char *))) { + char *topush = bprintf(" %s", xbt_dynar_getfirst_as(da, char *)); + xbt_dynar_push(diff, &topush); + xbt_dynar_shift(da, NULL); + xbt_dynar_shift(db, NULL); + length_da--; + } - xbt_dynar_free(&da); + /* Compute the diff for the remaining */ + C = diff_build_LCS(da, db, length_da, xbt_dynar_length(db)); + diff_build_diff(diff, C, da, db, length_da - 1, xbt_dynar_length(db) - 1); + xbt_matrix_free(C); xbt_dynar_free(&db); + + /* Add the common suffix */ + for (; length_da < xbt_dynar_length(da); length_da++) { + char *topush = bprintf(" %s", xbt_dynar_get_as(da, length_da, char *)); + xbt_dynar_push(diff, &topush); + } + xbt_dynar_free(&da); + + /* Build the final result */ + res = xbt_str_join(diff, "\n"); xbt_dynar_free(&diff); - xbt_matrix_free(C); - + + return res; +} + + +/** @brief creates a new string containing what can be read on a fd + * + */ +char *xbt_str_from_file(FILE * file) +{ + xbt_strbuff_t buff = xbt_strbuff_new(); + char *res; + char bread[1024]; + memset(bread, 0, 1024); + + while (!feof(file)) { + int got = fread(bread, 1, 1023, file); + bread[got] = '\0'; + xbt_strbuff_append(buff, bread); + } + + res = buff->data; + xbt_strbuff_free_container(buff); return res; } + +#ifdef SIMGRID_TEST +#include "xbt/str.h" + +#define mytest(name, input, expected) \ + xbt_test_add(name); \ + d=xbt_str_split_quoted(input); \ + s=xbt_str_join(d,"XXX"); \ + xbt_test_assert(!strcmp(s,expected),\ + "Input (%s) leads to (%s) instead of (%s)", \ + input,s,expected);\ + free(s); \ + xbt_dynar_free(&d); + +XBT_TEST_SUITE("xbt_str", "String Handling"); +XBT_TEST_UNIT("xbt_str_split_quoted", test_split_quoted, "test the function xbt_str_split_quoted") +{ + xbt_dynar_t d; + char *s; + + mytest("Empty", "", ""); + mytest("Basic test", "toto tutu", "totoXXXtutu"); + mytest("Useless backslashes", "\\t\\o\\t\\o \\t\\u\\t\\u", + "totoXXXtutu"); + mytest("Protected space", "toto\\ tutu", "toto tutu"); + mytest("Several spaces", "toto tutu", "totoXXXtutu"); + mytest("LTriming", " toto tatu", "totoXXXtatu"); + mytest("Triming", " toto tutu ", "totoXXXtutu"); + mytest("Single quotes", "'toto tutu' tata", "toto tutuXXXtata"); + mytest("Double quotes", "\"toto tutu\" tata", "toto tutuXXXtata"); + mytest("Mixed quotes", "\"toto' 'tutu\" tata", "toto' 'tutuXXXtata"); + mytest("Backslashed quotes", "\\'toto tutu\\' tata", + "'totoXXXtutu'XXXtata"); + mytest("Backslashed quotes + quotes", "'toto \\'tutu' tata", + "toto 'tutuXXXtata"); + +} + +#define mytest_str(name, input, separator, expected) \ + xbt_test_add(name); \ + d=xbt_str_split_str(input, separator); \ + s=xbt_str_join(d,"XXX"); \ + xbt_test_assert(!strcmp(s,expected),\ + "Input (%s) leads to (%s) instead of (%s)", \ + input,s,expected);\ + free(s); \ + xbt_dynar_free(&d); + +XBT_TEST_UNIT("xbt_str_split_str", test_split_str, "test the function xbt_str_split_str") +{ + xbt_dynar_t d; + char *s; + + mytest_str("Empty string and separator", "", "", ""); + mytest_str("Empty string", "", "##", ""); + mytest_str("Empty separator", "toto", "", "toto"); + mytest_str("String with no separator in it", "toto", "##", "toto"); + mytest_str("Basic test", "toto##tutu", "##", "totoXXXtutu"); +} + +/* Last args are format string and parameters for xbt_test_add */ +#define mytest_diff(s1, s2, diff, ...) \ + do { \ + char *mytest_diff_res; \ + xbt_test_add(__VA_ARGS__); \ + mytest_diff_res = xbt_str_diff(s1, s2); \ + xbt_test_assert(!strcmp(mytest_diff_res, diff), \ + "Wrong output:\n--- got:\n%s\n--- expected:\n%s\n---", \ + mytest_diff_res, diff); \ + free(mytest_diff_res); \ + } while (0) + +XBT_TEST_UNIT("xbt_str_diff", test_diff, "test the function xbt_str_diff") +{ + unsigned i; + + /* Trivial cases */ + mytest_diff("a", "a", " a", "1 word, no difference"); + mytest_diff("a", "A", "- a\n+ A", "1 word, different"); + mytest_diff("a\n", "a\n", " a", "1 line, no difference"); + mytest_diff("a\n", "A\n", "- a\n+ A", "1 line, different"); + + /* Empty strings */ + mytest_diff("", "", "", "empty strings"); + mytest_diff("", "a", "+ a", "1 word, added"); + mytest_diff("a", "", "- a", "1 word, removed"); + mytest_diff("", "a\n", "+ a", "1 line, added"); + mytest_diff("a\n", "", "- a", "1 line, removed"); + mytest_diff("", "a\nb\nc\n", "+ a\n+ b\n+ c", "4 lines, all added"); + mytest_diff("a\nb\nc\n", "", "- a\n- b\n- c", "4 lines, all removed"); + + /* Empty lines */ + mytest_diff("\n", "\n", " ", "empty lines"); + mytest_diff("", "\n", "+ ", "empty line, added"); + mytest_diff("\n", "", "- ", "empty line, removed"); + + mytest_diff("a", "\na", "+ \n a", "empty line added before word"); + mytest_diff("a", "a\n\n", " a\n+ ", "empty line added after word"); + mytest_diff("\na", "a", "- \n a", "empty line removed before word"); + mytest_diff("a\n\n", "a", " a\n- ", "empty line removed after word"); + + mytest_diff("a\n", "\na\n", "+ \n a", "empty line added before line"); + mytest_diff("a\n", "a\n\n", " a\n+ ", "empty line added after line"); + mytest_diff("\na\n", "a\n", "- \n a", "empty line removed before line"); + mytest_diff("a\n\n", "a\n", " a\n- ", "empty line removed after line"); + + mytest_diff("a\nb\nc\nd\n", "\na\nb\nc\nd\n", "+ \n a\n b\n c\n d", + "empty line added before 4 lines"); + mytest_diff("a\nb\nc\nd\n", "a\nb\nc\nd\n\n", " a\n b\n c\n d\n+ ", + "empty line added after 4 lines"); + mytest_diff("\na\nb\nc\nd\n", "a\nb\nc\nd\n", "- \n a\n b\n c\n d", + "empty line removed before 4 lines"); + mytest_diff("a\nb\nc\nd\n\n", "a\nb\nc\nd\n", " a\n b\n c\n d\n- ", + "empty line removed after 4 lines"); + + /* Missing newline at the end of one of the strings */ + mytest_diff("a\n", "a", " a", "1 line, 1 word, no difference"); + mytest_diff("a", "a\n", " a", "1 word, 1 line, no difference"); + mytest_diff("a\n", "A", "- a\n+ A", "1 line, 1 word, different"); + mytest_diff("a", "A\n", "- a\n+ A", "1 word, 1 line, different"); + + mytest_diff("a\nb\nc\nd", "a\nb\nc\nd\n", " a\n b\n c\n d", + "4 lines, no newline on first"); + mytest_diff("a\nb\nc\nd\n", "a\nb\nc\nd", " a\n b\n c\n d", + "4 lines, no newline on second"); + + /* Four lines, all combinations of differences */ + for (i = 0 ; i < (1U << 4) ; i++) { + char d2[4 + 1]; + char s2[4 * 2 + 1]; + char res[4 * 8 + 1]; + char *pd = d2; + char *ps = s2; + char *pr = res; + unsigned j = 0; + while (j < 4) { + unsigned k; + for (/* j */ ; j < 4 && !(i & (1U << j)) ; j++) { + *pd++ = "abcd"[j]; + ps += sprintf(ps, "%c\n", "abcd"[j]); + pr += sprintf(pr, " %c\n", "abcd"[j]); + } + for (k = j ; k < 4 && (i & (1U << k)) ; k++) { + *pd++ = "ABCD"[k]; + ps += sprintf(ps, "%c\n", "ABCD"[k]); + pr += sprintf(pr, "- %c\n", "abcd"[k]); + } + for (/* j */ ; j < k ; j++) { + pr += sprintf(pr, "+ %c\n", "ABCD"[j]); + } + } + *pd = '\0'; + *--pr = '\0'; /* strip last '\n' from expected result */ + mytest_diff("a\nb\nc\nd\n", s2, res, + "compare (abcd) with changed (%s)", d2); + } + + /* Subsets of four lines, do not test for empty subset */ + for (i = 1 ; i < (1U << 4) ; i++) { + char d2[4 + 1]; + char s2[4 * 2 + 1]; + char res[4 * 8 + 1]; + char *pd = d2; + char *ps = s2; + char *pr = res; + unsigned j = 0; + while (j < 4) { + for (/* j */ ; j < 4 && (i & (1U << j)) ; j++) { + *pd++ = "abcd"[j]; + ps += sprintf(ps, "%c\n", "abcd"[j]); + pr += sprintf(pr, " %c\n", "abcd"[j]); + } + for (/* j */; j < 4 && !(i & (1U << j)) ; j++) { + pr += sprintf(pr, "- %c\n", "abcd"[j]); + } + } + *pd = '\0'; + *--pr = '\0'; /* strip last '\n' from expected result */ + mytest_diff("a\nb\nc\nd\n", s2, res, + "compare (abcd) with subset (%s)", d2); + + for (pr = res ; *pr != '\0' ; pr++) + if (*pr == '-') + *pr = '+'; + mytest_diff(s2, "a\nb\nc\nd\n", res, + "compare subset (%s) with (abcd)", d2); + } +} + +#endif /* SIMGRID_TEST */